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v 2. 2 1 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush features ? 4,000 counts lcd display with 2 1 analog bar - graph ? l qfp 128l package ? 3v dc power supply ? slow adc conversion rate : 3 times/s ? bar - graph adc conversion rate : 3 0 times/s ? full automatic measurement voltage measurement : 400.0 mv , 4.000 v ? 1000v current measurement : a/ma/a frequency with voltage or current : resistance measurement : 40.00 ? 40.00 m capacitance measurement : 4.000 nf ? 40.00 mf ( taiwan patent no.: 323347, 453443 ) capacitance measurement for clampmeter mode : 4.000 nf ? 40.00 mf s mart auto check for r / s / d / c mode resistance : 0.0 ? 4.000 m (buz. on when r < 30) capacitance : 0 . 5 00 nf ? 400.0 u f ( taiwan patent no.: 326361) not contact ac electric field detection frequency counter : 400.0 hz ? 40.00 mhz duty cycle measurement : 5% ? 95% (< 10khz) ? diode measurement & continuity check ? hazardous ac/dc voltage (hv) indication ? 4 adp modes with external reference voltage and independent ?adp? user - defined segment on lcd ? temperature mode with internal scale translation circuit from 0 c to 0 f ? k - type thermoc ouple reference table compensation ( - 200 ~ 1350 o c range) ? push functions : inrush function va hz function max/min function relative function zero function: dca clampmeter only back light function key function data hold and delayed - hold function range change function semi - auto calibration operation ( taiwan patent no.: 367334 ) ? low pass filter mode for aca/acv measurement ( taiwan patent no.: 36 2409 ) ? band - gap reference voltage output ? voltage overflow selection ( dc / ac : 1010v, dc / ac : 610v ) ? serial data output ( rs232 format ) ? lcd segment check when power on ? auto power off ( 30min / 15min ) ? sleep state indicative signal output ? re - power on ? on - chip buzzer driver ? low battery detection ? description ES236 is an integrated analog - to - digital converter with 4,000- count lcd with bar - graph display, automatic range selection, and 3v dc power supply. automatic range selection is provided for acv/dcv measurement, resistance measurement, current measurement, capacitance measurement, and frequency counter. expensive and bulky m echanical range switches are not required. other features include relative value display, offset rem oving feature for dca clam p mode , data holding, maximum and minimum value holding, duty cycle measurement, diode measurement, inrush function for clamp - on a ca mode , temperature measurement, continuity checking, low battery detection, auto power off, re - power on, backlight driver, buzzer driver and rs232 data output.
v 2. 2 2 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush application ? digital multimeter ? clamp meter pin assignment ? 128l l qfp package cshp 127 cln 10 cshn 128 ivs 1 a dp 2 chp 5 chn 6 cih 7 bufh 8 cil 12 caz h 9 clp 11 caz l 13 bufl 14 raz 15 v rh 16 vr_clamp 18 o hm c4 20 o hm c3 21 o hm c2 22 o hm c1 23 o vsg 24 o r1 25 v r4 27 v r3 28 v r2 29 acvl 30 v r5 26 acvh 31 a di 32 a do 33 test5 34 sgn d 35 v r1 36 lpfout 38 mvi n 37 lpc1 39 lpc2 40 lpc3 41 can 42 cap 43 r1 0k 44 r1k 45 o vx 46 o vh 47 ovh1 48 sleep 49 freq 50 calenp 51 sda p 52 bzout 54 bkout 55 alarm1 56 alarm 57 bp4 58 bp3 59 bp2 60 bp1 61 se g2 9 62 se g2 8 63 seg2 6 65 seg2 5 66 seg2 4 67 seg2 3 68 seg2 2 69 seg2 1 70 seg2 0 71 seg1 9 72 seg1 8 73 seg1 7 74 seg1 6 75 seg1 5 76 seg1 4 77 seg1 3 78 seg1 2 79 seg1 1 80 seg1 0 81 seg0 9 82 seg0 8 83 seg0 7 84 seg0 6 85 seg0 5 86 seg0 4 87 seg0 3 88 seg0 2 89 seg0 1 90 cese l 91 sel 2 92 sel 1 93 d is 94 tsel 95 v st 96 aposel 97 vbar 98 rs232 99 o sc2 1 00 o sc1 1 01 t em pin 3 clampi n 4 vr_adp 19 rsout 1 02 inrush 103 hz 104 m mx 105 rel 106 bkl i t 107 key 108 h ol d 109 range 110 fc5 111 fc4 112 fc3 113 fc2 114 fc1 115 sl acd c 116 cn 117 cp 118 lbat9 119 v- 120 v- 121 v+ 122 v+ 123 dgnd 124 agnd 125 agnd 126 d aco 17 sclp 53 se g2 7 64 es23 6 cyrustek. com.tw
v 2. 2 3 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush pin description pin no symbol type description 1 ivs i m easurement input in ua/ma current mode. 2 adp i measurement input in adp mode. 3 tempin i measurement input in temperature mode. 4 clampin i current measurement input in clamp mode. 5 chp i / o positive connection for reference capacitor of high - speed a/d. 6 chn i / o negative connection for reference capacitor of high - speed a/d. 7 cih o high - speed integrator output. connect to integral capacitor. 8 bufh o high - speed buffer output pin. conn ect to integral resistor. 9 cazh o high - speed auto - zero capacitor connection. 10 cln i / o nega tive connection for reference capacitor of high - resolution a/d. 11 clp i / o posi tive connection for reference capacitor of high - resolution a/d. 12 cil o hi gh - resolution integrator output. connect to integral capacitor. ( metalized polypropylene film capacitor type is recommended) 13 cazl o high - resolution auto - zero capacitor connection. 14 bufl o high - resolution b uffer output pin. connect to integral resist or 15 raz o buffer output pin in az and zi phase. 16 vrh o output of band - gap voltage reference. typically ? 1.23v . 17 daco o output of band - gap voltage reference. typically ? 400 m v. 18 vr_clamp i reference input voltage connection. typically ? 400 mv. 19 vr_adp i reference input voltage connection. typically ? 400mv. 20 ohmc4 o filter capacitor connection for resistance mode. 21 ohmc3 o filter capacitor connection for resistance mode. 22 ohmc2 o filter capacitor connection for resistance mode. 23 oh mc1 o filter capacitor connection for resistance mode. 24 ovsg o sense low voltage for resistance/voltage measurement 25 or1 o reference resistor connection for 40.00 / 400.0 range 26 vr5 o voltage measurement 10000 attenuator(1000v) 27 vr4 o voltage measurement 1000 attenuator( 400.0 v) 28 vr3 o voltage measurement 100 attenuator( 40.00 v) 29 vr2 o voltage measurement 10 attenuator( 4.000 v) 30 acvl i rectified signal low input in acv/aca mode. connect to negative output of external ac to dc converter. 31 acvh i rectified signal high input in acv/aca mode. connect to positive output of external ac to dc converter. 32 adi i negative input of internal ac to dc op amp. 33 ado o output of internal ac to dc op amp. 34 test5 o buffer output of ovsg. 35 sgnd i signal ground input . 36 vr1 i measurement input. connect to a precise d 10m resistor.
v 2. 2 4 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush pin description ( c ontinued ) pin no symbol type description 37 mvin i measurement input in 400.0 mv mode. 38 lpfout o capacitor c1 connection for internal low - pass filter. 39 lpc1 o capacitor c1 connection for internal low - pass filter. 40 lpc2 o capacitor c2 connection for internal low - pass filter. 41 lpc3 o capacitor c3 connection for internal low - pass filter. 42 can i / o negative auto - zero capacitor connection for capacitor measurement. 43 cap i / o positive auto - zero capacitor co nnection for capacitor measurement. 44 r10k o connect to a precise d 10 k resister for capacitor measurement. 45 r1k o connect to a precise d 1k resister for capacitor measurement. 46 ovx i sense input for resistance / capacitance measurement. 47 ovh o output connection for resistance measurement. 48 ovh1 o output connect ion for resistance measurement. (optional) 49 sleep o sleep mode indicator, asserts low in sleep mode. 50 freq i frequency counter input, offset v - /2 internally by the chip. 51 calenp i pulled to v - to enable the calibration scheme . 52 sdap i / o input / output from to eeprom 24lc02 data. 53 sclp o output to eeprom 24lc02 clock. 54 bzout o outputs a 2khz audio frequency signal for driving piezoelectric buzzer 55 bkout o if bklit function is enabled, this pin will change from v - to v+ . o nce press bkli t pin again within 30 0 sec, this pin will change back to v - . 56 alarm1 o short circuit indication output . 57 alarm o hv signal detection in voltage mode and ef mode indication output . 58 bp4 o lcd backplane 4. 59 bp3 o lcd backplane 3. 60 bp2 o lcd ba ckplane 2. 61 bp1 o lcd backplane 1. 62 - 90 seg29 - seg01 o lcd segment line 01 ? 29. 91 cesel * i voltage ol selection feature control pin. (10 1 0v/6 1 0v) 92 sel2 * i diode ol level and hv indication selection pin. 93 sel1 * i s et current mode ol level s election pin. (dmm or clamp mode) 94 dis * i control warning buzzer output at lpf and hv mode 95 tsel * i temperature mode controls the automatic mode or manual mode and enable or disable input terminal symbol displayed on the lcd panel selection pin. 96 vst * i e nable the auto range voltage mode to start from 400.0 v or disable adp input terminal symb o l displayed on the lcd panel selection pin. 97 aposel i idle time selection for auto power off feature. 98 vbar i in a or ma modes, it is used to control t he ?? or ?m? sign. set to v - to enable clamp current mode.
v 2. 2 5 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush pin description ( c ontinued ) pin no symbol type description 99 rs232 i assert low (v - ) to make serial data output function not available . 100 osc2 o crystal oscillator output connection . 101 osc1 i crystal oscillator input connection . 102 rsout o serial data output. 103 inrush i pulse to v - to enable the inrush function for aca mode . 104 hz i pulse to v - to enable vahz mode or duty cycle measurement in freq. mode . 105 mmx i pulse to v - to enable max/min function. 106 rel i pulse to v - to enable /disable relative function or zero function. pulse to v - larger than one second to enable rs232 output. when rs232 output is enabled, t h e apo will be disable d automatically. 107 bklit i back light function. pulse low to set bkout pin output. 108 key i pulse to v - to change mode. 109 hold i pulse to v - to enable hold function. pulse to v - larger than one second to enable delayed hold function. 110 range i pulse to v - to enable manual mode and manu al range selection. 111 fc5 i switch 5 for function selection. 112 fc4 i switch 4 for function selection. 113 fc3 i switch 3 for function selection. 114 fc2 i switch 2 for function selection. 115 fc1 i switch 1 for function selection. 116 slacdc i se lect initial dc/ac state. 117 cn o negative capacitor connection for on - chip dc - dc converter. 118 cp o positive capacitor connection for on - chip dc - dc converter. 119 l b at 9 i multi - level low battery configuration input. simple external resistor divider i s required. 120 v - p negative supply voltage. 121 v - p negative supply voltage. 122 v+ o output of on - chip dc - dc converter. 123 v+ o output of on - chip dc - dc converter. 124 dgnd p / g digital ground. 125 agnd p / g analog ground. 126 agnd p / g analo g ground. 127 cs h p i / o positive inrush hold terminal. 128 cshn i / o negative inrush hold terminal . note: p in9 1- p in96 are 4 - level logic definition: (v+/dgnd/floating/v - ) , see section operation mode
v 2. 2 6 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush absolute maximum ratings characteristic rating s upply voltage (v - to agnd) - 4v analog input voltage v - - 0.6 to v+ +0.6 v+ v+ (agnd/dgnd+0.5v) agnd/dgnd agnd/dgnd (v - - 0.5v) digital input v - - 0.6 to dgnd +0.6 power dissipation. flat package 500mw operating temperature - 20 to 70 storage tempe rature - 4 5 to 125 electrical characteristics parameter symbol test condition min. typ. max units power supply v - 2. 4 - 3. 0 3. 3 v operating supply current in dcv mode i dd normal operation ? 1.8 2.5 ma i ss in sleep mode ? 5 10 a voltage roll - over e rror rev 10m input resistor ? ? 0.1 %f.s 1 voltage nonlinearity nlv best case straight line cil=mpr capacitor ? ? 0.1 %f.s 1 zero input reading 10m input resistor - 000 000 +000 counts band - gap reference voltage v ref 100k resistor between vrh and agn d - 1.3 0 - 1.2 3 - 1.1 6 v open circuit voltage for 6 0 0 measurement v - =3v ? - 3. 0 ? v open circuit voltage for other measurement - 1.19 - 1.08 - 0.97 v peak to peak backplane voltage - 3.5v v - 2.2v 3.0 3.1 3.2 v internal pull - high to 0v current between v - pin and hold, range, key, fc1 - fc5, bklit, ? 1.2 ? a between v - pin and rs232 ? 11 ? a ac frequency response at 4.000 v range 1% ? 40- 400 ? hz 5% (no compensated) ? 400- 2000 ? 3db frequency for lpf mode f 3db = 1khz ? 1k ? khz f 3db = full 100k ? ? khz multi - level low battery detector v t1 l b at 9 v s . v - 2.15 v v t2 1.82 reference voltage temperature coefficient tc rf - 20 v 2. 2 7 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush function description 1. operating modes 1.1. semi - auto calibration scheme ES236 includes dmm & c lamp - on meter features in single chip. dmm manufacturers need the calibration process in production. the traditional solution needs the variable resistors for calibration by manual adjustment. ES236 provide another calibration scheme and the most variable resistors could be ignored. when ES236 is at off - state, pull calenp (pin 51 ) to v - to active the calibration scheme after re - power on. a digital controlled voltage output will be active from daco. when semi - auto calibration scheme is active, use hold (or bklit ) key to decrease voltage and use range (or mmx ) key to increase the voltage. decrease the reference voltage means the counts o n display will be increased. increase the reference voltage means the counts on display will be decreased. the adjustment step is approximate one count. if coarse adjustment is required, push hold (or bklit ) and range (or mmx ) larger than one second to spe ed up to approximate 1 0 counts per second. after calibration process is finished, push hold (or bklit ) and range (or mmx ) less than 1 sec . simultaneously to save the digital control code to external eeprom (24 l c02) . the semi - auto calibration scheme suppo rts the following nine measurement modes. when calenp pin is active, set the proper function switches or push key to choose the target measurement mode. when mode is selected, the lcd segment of unit at related measurement will be blinking. mode default ra nge for cal remark voltage measurement 4.000 v (dc/ac separated) accuracy of other ranges is guaranteed by external resistor. mv voltage measurement 400.0 mv (dc/ac separated) dc current measurement for m ultimeter (ua/ma) 400.0 a or 4000 a ( 2 modes choose one for calibration ) auto 2 ranges choose one, p roposed to use a large range to calibration . a c current measurement for m ultimeter (ua/ma) 400.0 a or 4000 a ( 2 modes choose one for calibration ) auto 2 range s separate d for cal ibration is necessary . dc current measurement for m ultimeter (a) 4a or 20a auto 2 ranges choose one, p roposed to use a large range to calibration . a c current measurement for m ultimeter (a) 4a or 20a auto 2 range s individual for calibration is necessary. dc current measurement for clampmeter 400.0 a or 4000 a ( 6 modes choose one for calibration ) auto 2 ranges choose one, p roposed to use a large range to calibration . a c current measurement for clampmeter 400.0 a or 4000 a ( 6 modes choose one for calibration ) auto 2 range s separate d for calibration is necessary . capacitor measurement 40.00 nf temperature measurement 400.0 lower range in auto temperature measurement. adp measurement 4000 / 400.0 / 40.00 / 4.000 4 range s sep arate d for c alibration . after calibration procedure is finished, set ES236 to off - state and set calenp (pin51) to dgnd or kept floating to return to normal mode operation after re - power on.
v 2. 2 8 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 1.2. voltage measurement a re - configurable voltage divider automatic ally provides a suitable range in voltage measurement mode. 400.0 mv range is independent and manual mode. it takes input signal from mvin pin . the following table summarizes the full - scale ranges in each configuration. configuration full scale range divid er ratio resister connection input pin vr1 400.0 mv 1 - mvin v.s. sgnd vr2 4.000 v 1/10 vr2 (1.111m) vr1 v.s. sgnd vr3 40.00 v 1/100 vr3 (101k) vr1 v.s. sgnd vr4 400.0 v 1/1000 vr4 (10k) vr1 v.s. sgnd vr5 1000v 1/10000 vr5 (1k) vr1 v.s. sgnd the vst pin is used to control the voltage start range from 4.000 v or 400.0v , refer to the table. vst v+ dgnd f loating v - initial state 400.0 v 4.000 v 400.0 v 4.000 v the ES236 provide two types of the hazardous live voltage warning by different condition. sel2 v+ dgnd f loating v - dcv 35v 70v acv 16v 33v when the voltage measured exceeds the level defined, t he buzzer generates 2khz beep and alarm (pin 57 ) drive high output (v+ level) periodically. it can remind the user to notice the hazardous volta ge. the buzzer sound warning could be cancelled by dis (pin94). dis v+ dgnd f loating v - buzzer disable enable
v 2. 2 9 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 1.2.1. ol selection ES236 has a voltage ol selection feature archived by configuring the pin cesel . in automatic voltage mode, ES236 will show ol when the voltage is exceed the overflow level. if cesel is connected to v+ , ES236 will have a 1010v overflow level in voltage mode. if cesel connected to dgnd , the overflow level will be set to 6 10v in dcv and acv mode. the configuration of cesel is listed below. for acv/dcv voltage mode s : cesel v+ dgnd ol level 101 0v 6 1 0v note: v - /floating level is not available. 1.3. low p ass f ilter (lpf) m ode f or aca/acv m ode ES236 provides a 3 rd order low - pass filter to reduce the influence of high freque ncy noise. this lpf feature is available in acv or aca modes. set fc5 to low in these modes, the key button is used to activate the lpf feature. press key button for less than 1 second to select the 3db bandwidth of lpf sequentially ( full / 1khz ) and the relative lcd symbol on lcd panel will be active also. when inrush mode is active, the lpf mode (bw 3db = 1khz) will be en abled temporarily. the dis (pin94) could enable/disable the low pass filter feature available. dis v+ dgnd f loating v - lpf disab le enable disable enable
v 2. 2 10 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 1.4. current m easurement f or m ulti - meter ES236 has 3 automatic current measurement modes for multimeter. the following table summarizes the full - scale range of each mode. when ES236 operates in the current measurement modes for multi - meter, i t takes high input from pin ivs , low input from pin sgnd and reference voltage from calibration scheme . mode fc1~4 1 vbar full scale input terminal automatic1 1,1,0,1 1 400.0 a / 4000a ivs v.s. sgnd automatic2 1,1,1,1 1 40.00 ma / 400.0 ma ivs v.s. sgnd automatic 3 0,0,0,0 1 4.000 a /10.00a 2 ivs v.s. sgnd note: 1. connect vbar to v - will disable the ? 2 ? / ?m 2 ? symbol on lcd panel . 2. connect sel 1 to v+ (or f loated ) or v - (or dgnd) will set maximum readings of input for automatic3 mode . sel 1 v+ dgnd f loating v - ol level 10.00a 20.00a 10.00a 20.00a 1.5. current m easurement f or c lamp - meter ES236 has 2 automatic and 4 manual current measurement modes for clampmeter. the following table summarizes the full - scale range of each mode. when ES236 operate in the automatic mode s and the manual mode1~4 , it takes high input from clampin pin , low input from sgnd and reference voltage from vr _clamp . mode fc1~4 1 vbar full scale input terminal automatic1 1,1,0,1 0 400.0 a / 4000a 2 clampin v.s. sgnd auto matic2 1,1,1,1 0 40.00 a / 400.0 a clampin v.s. sgnd manual1 1,1,0,0 x 4.000 a clamp in v.s. sgnd manual2 1,0,0,0 x 40.00 a clamp in v.s. sgnd manual3 1,0,1,0 x 400.0 a clamp in v.s. sgnd manual4 1,0,0,1 x 1000a or 2000 a 2 clamp in v.s. sgnd note: 1. connect vbar to v - will disable the ? 2 ? / ?m 2 ? symbol on lcd panel . 2. connect sel 1 to dgnd or v - will set maximum of input for automatic1 & manual4 mode s . 3. in dc current modes for clamp - meter, ES236 provides zero f unction for offset removing. sel 1 v+ dgnd f loating v - ol level 1000a 2000a
v 2. 2 11 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 1.6. scan rsdc measurement ES236 provide the smart auto check mode for the dut type. it could scan the four types of device r esistor / s horted / d iode / c apacitor. push key to change to individual function is available. it could i ncrease the measurement ranges. the following table summarizes the detective range for the smart scan rsdc mode . mode fc1~ 4 slacdc available scanning range scan rsdc 1,1,1,0 0 r: ~ 4 m ? ( parasitic capacitance < 1 00pf) s: < 30 ? buzzer on d: forward/reverse diode direction c: ~ 4 00uf (minimum 5 00pf) 1.7. resistance measurement a re - configurable divider automatically provides a suitable full - scale range in resistance measurement mode. th e following table summarizes the f ull - s cale ranges and the reference r esistors in each configuration. configuration full scale range relative resistor equivalent value or 0 40.00 ? or1 100 or1 400.0 or1 100 or2 4.000 k vr5 1k or3 40.00 k vr4 || vr1 10k or4 400.0 k vr3 || vr1 100k or5 4.000 m vr2 || vr1 1m or6 40.00 m vr1 10m
v 2. 2 12 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 1.8. capacitance measurement the following table summarizes the eight ranges of capacitance measurement mode. configuration 1 full scale range relative resistor mea surement period c1 3 4.000 nf ratio to c2 0.3 6 sec c2 2 40.00 nf cal 0.3 6 sec c3 400.0 nf ratio to c2 1.15 sec c4 4.000 uf ratio to c2 1.15 sec c5 40.00 uf r 10k 0. 33 sec c6 400.0 uf r 10k 3 . 3 sec (max) c7 4.000 mf r1k 1.32 sec (max) c8 40.00 mf r1k 13. 2 sec (ma x) note: 1. in order to obtain an accurate reading, a capacitor must be discharged before measurement begins. the chip has a built - in discharge mode to automatically discharge the capacitor. in discharge mode, the main - display shows dis.c . discharging throug h the chip is quite slow. we recommend users to discharge the capacitor with some other apparatus. 2. the c2 range is calibrated in calibration scheme. 3. the c1 range residual offset could be compensated by the small capacitors near to ovh pin. 1.9. continuity check continuity check shares the same configuration with 400.0 manual resistance measurement mode and has buzzer output to indicate continuity. the buzzer generates 2khz beep and alarm1 (pin 56 ) drive high output (v+ level) whenever the reading is less than 30. the ES236 built in a high speed short detection circui t and the detection could be less than 10ms .
v 2. 2 13 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 1.10. diode measurement diode measurement mode shares the same configuration with 4.000 v manual voltage measurement mode and has buzzer output to indicate continuity. the buzzer generates a 2khz sound and alarm1 (pin 56 ) drive high output (v+ level) whenever the reading is less than 30mv. if the test circuit is open or the voltage drop between the two ports of the diode under test is larger than 2v or 2.5v (depends on sel2 pin level) , the lcd panel will show ?ol?. sel 2 v+ dgnd f loating v - ol 2.500v 2.000v 2.500v 2.000v the ES236 also support a led forward voltage measurement mode. it is necessary to use external source to achieve the measurement. the following table & diagram summarizes the diode & led measurement mode. mode slacdc fc1~4 sel2 full scale input terminal led 1 0,0,1,0 v + o r f l o at 3.500v vr1 v.s. sgnd l ed p tc l ed m od e r 1.111m 10m ovh v+ ovsg v es235 / 236 / 238 / 239 p tc external source diode mode inte rnal source
v 2. 2 14 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 1.11. frequency c ounter the time base of the frequency counter is derived from an external crystal oscillator by t counter = 4,000,000 f osc w here f osc is the frequency of the crystal oscillator. thus, the counter has a 1 - second time base when a 4mhz oscillator is used. the frequency counter can select the proper range automatically or manually. auto - range operation extends over six decades, from 400.0 hz to 40.00 mhz. the following table summarizes the full - scale range of the frequency counter. range full scale fr 1 400.0 hz fr 2 4.000 khz fr 3 40.00 khz fr 4 400.0 khz fr 5 4.000 mhz fr 6 40.00 mhz *if input frequency is less than 1 .0h z, ES236 will show 0 . 0hz 1.12. duty cycle m easurement when frequency mode is selected, push hz key to enter duty cycle measurement . the duty cycle mode range is within 5 .0% to 95 .0% (< 10khz@3vpp). the minimum resolution is 0.1%. if the source frequency duty cycle is smaller than 5.0 %, the ul will be shown on the lcd display. if the duty cycle is larger than 9 5.0 %, the ol will be shown on the lcd. when the frequency is zero, the duty cycle display will be 0.0% or ? ul ? shown.
v 2. 2 15 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 1.13. electrical field det ection mode ES236 supports a non - contact ac voltage measurement, which is called electric field measurement also. the adc input is configured from adp pin vs. sgnd . when no or less electric field is detected, the lcd display shows ?ef?. if the electric fi eld is detected, the strength will be showed on the lcd display by ? - ? not digits type. level 1(equivalent to 12.5% full scale of adc) is ? - ? and the level 4(equivalent to 100% full scale of adc) is ? ---- ?. additional beeper ( buzout pin) and led alarm ( ala rm pin) will be output from ES236 . the frequency of buzzer and led alarm depends on the strength of electric field also. the faster beeper means the stronger electric field (ac voltage) is sensed. mode fc1~ 4 slacdc full scale input terminal ef 1,1,1,0 1 - adp v.s. sgnd 1.14. temperature m easurement mode temperature measurement mode takes input signal from tempin pin. the ES236 ha s oc to of scale translation circuit and standard k - type thermocouple reference table is built - in . external cold - junction c ompensation circuit is still necessary. in temperature measurement mode , there is automatic mode and manual mode . the tsel pin (pin95) is used to control the automatic mode (0.1 o c/1 o c resolution) or manual mode (0.1 o c resolution) selection. it also could e nable or disable display of input terminal symbol on the lcd panel (seg28) . manual range auto range oc range - 200.0 oc ~ 400.0 oc - 200.0 oc ~ 400.0 oc / - 200 oc ~ 13 50 oc of range - 328.0 of ~ 752.0 of - 328.0 of ~ 752.0 of / - 328 of ~ 2462 of t he foll owing table summarizes the operation of tsel pin: tsel v+ dgnd f loating v - range select manual range auto range manual range auto range lcd seg28 display symbol on display symbol on display symbol off display symbol off adp 100 m ef test circuit efin+ sgnd agnd efin - 100k v radp - 400mv
v 2. 2 16 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush temperature mode circuit exam ple: 1.15. adp ES236 provides 4 manual range adp measurement modes for user define . the adp pin is auxiliary input terminal for adc of ES236 . the full scale for adp mode is 400.0 mv. if fc5=0, the minus sign will not be shown on lcd segment. mode fc1~ 4 slacdc full scale input terminal a dp0 0,0,1,1 1 4000 adp v.s. sgnd adp1 0,0,0,1 1 400.0 adp v.s. sgnd adp2 0,1,1,1 1 40.00 adp v.s. sgnd adp3 /led 0,0,1,0 1 1 4.000 adp v.s. sgnd note: 1. if sel2 pin is set to v+ or kept floating, the adp3 mode will be disable d a nd change to led mode. the vst pin (pin96) could be used to enable or disable input terminal symbol displayed on lcd panel for adp mode . vst v+ dgnd f loating v - lcd seg28 display symbol on display symbol off
v 2. 2 17 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 1.16. auto p ower o ff a nd i dle t ime s election ES236 has a default auto power off function. if the meter is idle for more than the given idle time duration , the chip automatically turns the power off. the idle time to trigger the auto power off function is determined by aposel pin. if aposel is connect ed to v - , the i dle t ime will be set to 30 minutes. if pin aposel is floating, the idle time will be set to 15 minutes. when apo is occurred , the state of the meter is reserved . the apo symbol on the lcd panel indicates whether the auto power off is enabled or not. in some cases, user might want to disable auto power off. there are two ways to disable this feature as following: 1. power on the meter when any of the push functions, except for hold, is pressed down. 2. in addition, when rs232 output is active, the a uto power off function is also disabled automa t ically . note: powering on the meter while pressing hold and lasts 2 seconds turns on all lcd segments until hold is pressed again. 1.17. sleep the meter enters sleep mode after auto power off. the sleep pin assert s low (v - ) in the sleep mode, and asserts high (v+, not 0v) after re - power on. 1.18. re - p ower o n after auto power - off, pushing any of the push function or changing the rotary mode can turn on the meter again. if the meter is re - powered on by changing the rotary mode, the saved state is cleared. if the meter is re - powered on by push functions, the chip restores the saved state and enters hold mode. the lcd displays the saved value. 1.19. hazardous voltage indication the ES236 could provide the ac/dc hazardous voltage indication for voltage/resistor/capacitor/diode modes. of course, the indication could support lcd symbol /led /buzzer driving simultaneously . especially ES236 could detect the ac voltage in dcv mode and detects the dc voltage in acv mode. it mean s if not proper ac or dc voltage signal exists on the dut when dcv or acv measurement mode is set, the hv indication will be active.
v 2. 2 18 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush hv indication criterion function / range dc voltage (typ.) ac voltage (typ.) ac mv > + 3v ol ac 4 v > + 20v ol ac 4 0v ? 1000v > + 100v depends on sel2 dc mv ol > 3vrms (40 - 1khz) dc 4 v ol > 20vrms (40 - 1khz) dc 4 0v - 1000v depends on sel2 > 90vrms (40 - 1khz) res/cap/diode modes > + 10v > 10vrms (40 - 1khz) note: if ac+dc signal is applied, the voltage criterion will be chang ed. 1.20. multi - level l ow b attery v oltage d etection ES236 provides a voltage detection input (pin 121: lbat9 ) for multi - level low battery application. there are two internal voltage reference vt1 & vt2 for comparing with lbat9 . if lbat9 is larger than vt1, the lcd segment of slb 1 ? slb 3 will active always. this status implies full battery. when lbat9 is less than vt1 but larger than vt2, the lcd segment of slb 1 will disappear and this status implies half battery. when lbat9 is less than vt2, the lcd segment of s lb2 will disappear and this status implies low battery. when the low battery status lasts for 10 seconds, the lcd segment of slb 3 will be blinking. when the slb 3 is blinking for 20 seconds, the operation of meter will be inhibited and lcd panel will show ? lo.bt?. in this case, it is suggested to replace a new battery immediately. after ?lo.bt? appears and lasts for 60 seconds, ES236 will enter to auto power off mode. l o.b t low battery condition > 30s operation not allowed dc 1.8 0 0 v low battery dc auto auto 1.8 0 0 v half battery dc auto 1.8 0 0 v full battery dc auto blinking l o.b t low battery condition > 30s operation not allowed dc 1.8 0 0 v low battery dc auto auto 1.8 0 0 v half battery dc auto 1.8 0 0 v full battery dc auto l o.b t low battery condition > 30s operation not allowed dc 1.8 0 0 v low battery dc auto auto 1.8 0 0 v half battery dc auto 1.8 0 0 v full battery dc auto blinking low battery test circuit (a) 120 k 470 k ba tte lbat9 v - agnd 0.1u 0v 3 v low battery test circuit (b) 910 k 30 0k ba tte lbat9 v - agnd 0.1u 0v 9v
v 2. 2 19 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 2. measurement mode switching measurement mode depends on the logic leve l of slacdc, fc1, fc2, fc3, fc4, fc5 and key selection . when fc5 is high, the measurement mode list is shown below : slacdc fc1 fc2 fc3 fc4 mode key selection 0 1 0 1 1 dc voltage measurement dcv ? acv 0 1 1 0 1 2 3 auto dc current measurement(a) dca ? aca 0 1 1 1 1 2 3 auto dc current measurement(ma) dca ? aca 0 0 0 0 0 2 3 a uto dc current measurement(a) dca ? aca 0 1 1 1 0 scan rsdc ? continuity ? diode ? cap ? s can 0 1 1 0 0 3 manual dc 4.0 00 a dca ? aca 0 1 0 0 0 3 manual dc 40.00 a dca ? aca 0 1 0 1 0 3 manual dc 400.0 a dca ? aca 0 1 0 0 1 3 manual dc 4000 a dca ? aca 0 0 0 1 1 resistance measurement ? continuity 0 0 0 0 1 continuity check continuity ? diode 0 0 1 1 1 resistance measurem ent ? continuity ? diode 0 0 0 1 0 frequency measurement ---- 0 0 1 1 0 capacitance measurement ---- 0 0 1 0 0 auto temperature measurement ? H 0 0 1 0 1 dcmv dc m v ? ac m v 1 1 0 1 1 ac voltage measurement a cv ? d cv 1 1 1 0 1 2 3 auto ac current measu rement(a) a ca ? d ca 1 1 1 1 1 2 3 auto ac current measurement(ma) a ca ? d ca 1 0 0 0 0 2 3 auto ac current measurement(a) a ca ? d ca 1 1 1 1 0 ef mode ---- 1 1 1 0 0 3 manual ac 4.000 a a ca ? d ca 1 1 0 0 0 3 manual ac 40.00 a a ca ? d ca 1 1 0 1 0 3 manual ac 40 0.0 a a ca ? d ca 1 1 0 0 1 3 manual ac 4000 a a ca ? d ca 1 0 0 1 1 1 adp0 ( 4000 ) ---- 1 0 0 0 1 1 adp1 ( 400.0 ) ---- 1 0 1 1 1 1 adp2 ( 40.00 ) ---- 1 0 0 1 0 1 adp3 ( 4.000 ) set to led mode if sel2 is kept float 1 0 1 1 0 capacitance measurement (clamp) ---- 1 0 1 0 0 auto temperature measurement y? 1 0 1 0 1 acmv a c m v ? d cm v note: 1. when fc5 is high, the adp0, adp1, adp2 and adp3 modes can display minus sign. 2. t hese modes could be designed for multimeter current modes, please refer to section 1. 4 . 3. t hese modes could be designed for clampmeter current modes, please refer to section 1. 5 . .
v 2. 2 20 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush measurement mode switching (c ontinued ) measurement mode depends on the logic level of slacdc, fc1, fc2, fc3, fc4, fc5 and key selection . when fc5 is low, the key func tion is disable d in most modes . the measurement mode list is shown below : slacdc fc1 fc2 fc3 fc4 mode key selection & remaks 0 1 0 1 1 d c voltage measurement ---- 0 1 1 0 1 2 3 auto dc current measurement(a) ---- 0 1 1 1 1 2 3 auto dc current measurement( ma) ---- 0 0 0 0 0 2 3 a uto dc current measurement(a) ---- 0 1 1 1 0 scan rsdc ? continuity ? diode ? cap ? s can 0 1 1 0 0 3 manual dc 4.000 a ---- 0 1 0 0 0 3 manual dc 40.00 a ---- 0 1 0 1 0 3 manual dc 400.0 a ---- 0 1 0 0 1 3 manual dc 4000 a ---- 0 0 0 1 1 resistance measurement ---- 0 0 0 0 1 continuity check ---- 0 0 1 1 1 diode measurement ---- 0 0 0 1 0 frequency measurement ---- 0 0 1 1 0 capacitance measurement ---- 0 0 1 0 0 auto temperature measurement 0 0 1 0 1 dcmv ---- 1 1 0 1 1 ac v oltage measurement lpf full ? ? 1k 1 1 1 0 1 2 3 auto ac current measurement(a) lpf full ? ? 1k 1 1 1 1 1 2 3 auto ac current measurement(ma) lpf full ? ? 1k 1 0 0 0 0 2 3 auto ac current measurement(a) lpf full ? ? 1k 1 1 1 1 0 ef mode ---- 1 1 1 0 0 3 manual ac 4.000 a lpf full ? ? 1k 1 1 0 0 0 3 manual ac 40.00 a lpf full ? ? 1k 1 1 0 1 0 3 manual ac 400.0 a lpf full ? ? 1k 1 1 0 0 1 3 manual ac 4000 a lpf full ? ? 1k 1 0 0 1 1 1 adp0 ( 4000 ) ---- 1 0 0 0 1 1 adp1 ( 400.0 ) ---- 1 0 1 1 1 1 adp2 ( 40.00 ) ---- 1 0 0 1 0 1 adp3 ( 4. 000 ) set to led mode if sel2 is kept float 1 0 1 1 0 capacitance measurement (clamp) ---- 1 0 1 0 0 auto temperature measurement H 1 0 1 0 1 acmv lpf full ? ? 1k note: 1. when fc5 is lo w, the adp0, adp1, adp2 and adp3 modes can ? t display minus sign. 2. these m odes could be designed for multi - meter current modes, please refer to section 1. 4 . 3. these modes could be designed for clamp - meter current modes, please refer to section 1. 5 .
v 2. 2 21 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 3. push function all the enabled push functions will be reset when the measurement mode is changed when fc1 - fc5 modes are changed . the following table lists the available function versus every measurement mode . note: 1 include automatic a, automatic ma and manual a modes, please refer to section 1. 4 . 2 include 2 automatic modes and 4 manual modes, please refer to section 1. 5 . 3 when clamp - meter dca mode is selected, the rel function will be changed to zero function operat ion automatically. 4 only auto range temperature mode is available. 5 when rs232 (pin 99 ) is pulled to v - , push rel key and lasts for 2 seconds will active the uart output. inrush h z m mx rel /rs232 5 bklit k ey hold range voltage mode x ac o o o o o o mv mode x ac o o o o o x 1 current mode for mult imeter x ac o o o o o o 2 current mode for clampmeter o ac o o 3 o o o x resistance x x o o o o o o continuity x x o o o o o x diode mode x x o o o o o x frequency x o x o o x o o capacitance x x o o o x o o temperature x x o o o o o o 4 scan rsdc x x x o o o o x ef mode x x x o o x x x adp mode x x o o o x o x
v 2. 2 22 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 3.1. range push range 1 key to switch from automatic to manual mode, and whi le in manual mode, changes the f ull - s cale range. the following figure shows the state transition. automatic mode manual mode 1 push < 1 sec 1 push > 1 sec 1 push < 1 sec range up measurement mode auto manual control range initial range v vr2 ? vr5 vri vri + 1, vr5 vr 2 4.000 v ? 1000v 4.000 v 2 auto a r1 ? r2 r1 r2, r2 r1 400.0 a ? 4000 a 400.0 a auto ma r1 r2 r1 r2 r2 r1 40.00 ma ? 400.0 ma 40.00 ma auto a r1 r2 r1 r2 r2 r1 4.000 a ? 10.00a 4.000 a auto 6 0 a/ 6 0 0a (clamp) r1 r2 r1 r2 r2 r1 40.00 a ? 400.0 a 40.00 a auto 6 0 0a/ 4000 a (clamp) r1 r2 r1 r2 r2 r1 400.0 a ? 4000 a 400.0 a capacitance c1 ? c8 ci ci + 1, c8 c1 4.000 nf ? 40.00 mf 4.000 nf capacitance (clamp) c1 ? c8 ci ci + 1, c8 c1 4.000 nf ? 40.00 mf 4.000 nf or 0 ? or 6 ori ori + 1, or 6 or 0 40.00 ? 40.00 m 40.00 temp t1 - t2 t1 ? t2 t2 ? t1 400.0 o c~1350 o c 400.0 o c frequency fr1 ? fr7 fri fri + 1 fr7 fr1 400.0 hz ? 40.00 mhz 400.0 hz note: 1. pushing range resets all existing special modes except for vahz mode . 2. initial range of voltage mode depends on vst pin configuration
v 2. 2 23 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush original state (aut o/manual) rel active. the relative value rel and h active. hold the relative value push hold push rel push rel push hold 3.2. hold a nd delay ed hold f eature hold mode makes the meter stop updating the lcd panel. this mode can be nested in most of the special modes. enabling hold function in automatic mode makes the meter swi tch to manual mode, but the full - scale range remains the same. ES236 provides a delay hold feature. to activate delay hold feature, press down the hold bottom and last for 2 seconds. the meter will delay for 6 seconds, than enters hold mode. in the 6 - secno d delayed time, the hold symbol on lcd panel will blink. hold function and the delayed state can be cancelled by changing the measurement mode, pressing range , or push hold again. normal mode (auto/manual) hold mode (manual) push < 2s delay state (auto/manual) push > 2s push < 2s push < 2s push > 2s 6sec past 3.3. key see section ?measurement mode switching? for the function of this pi n. 3.4. rel + hold in rel mode, the lcd panel displays d n+k - d n , where n = 1, 2, 3, ? , d n is the last value before rel key is pushed, and d n+k is the current value. the meter returns to normal operation if rel is pressed again. pressing hold in rel mode make s the meter stop updating the lcd panel . note: 1. it?s possible that relative value ( d n+k - d n ) exceeds 4,000 or - 4,000 counts. the lcd shows ol in rel mode only if d n or d n+k is more than 4,000 counts .
v 2. 2 24 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush original state (automatic/manual) ?max? active max value ?min? active min value ?max? ?h? active hold max value. ?min? ?h? active hold min v alue. push hold push hold 1push<1s 1 push>1 sec 1 push>1s 1 push<1s ?max? ?min? blink current value 1push<1s push hold ?max??min? ?h? blink hold current value. 1push<1s 1push<1s 1 push>1 sec 1push<1s 1push<1s 3.5. max/min + hold the meter displays the maximu m or minimum value of the input in max/min mode. when mmx key is pressed for the first time, the meter displays the maximum value. the meter displays the minimum value, when it is pressed again. when mmx key is pressed for the third time, the meter display s current value. the meter returns to normal operation if mmx is pressed and held for longer than one second. pressing hold in max/min mode makes the meter stop updating the maximum or the minimum value. 3.6. relative + max/min + hold max/min mode c an be nested in rel mode. the meter displays the maximum or minimum value relative to the reference when mmx is pressed in rel mode. pressing hold under rel + max/min makes the meter stop updating the lcd panel . original state (auto/manual) rel active. the relative value rel and max active. maximum rel. value rel max min blink. current rel. value rel and min active. minimum rel. value push mmx push mmx > 1s push mmx rel , max , h active. hold max. rel. value rel , min , h active. hold min. rel. value rel , max , min , h blink. hold the cu rrent rel. value push mmx push mmx push hold push hold push hold push mmx push rel push rel push mmx
v 2. 2 25 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 3.7. inrush f unction ES236 provides an inrush function for ac current measurement for clampmeter to dectect the starting - up current of a motor. push inrush (pin 10 3 ) key to enable the inrush function. when inrush mode is active , the lcd display shows ? - - - - ? until the motor starting up and being det ected. if the starting - up signal is detected, ES236 execute the inrush current measurement and held the inrush rms current value with 100ms integration period on lcd display. when the inrush current measurement is done, press inrush could enter inrush mode (waiting state) again. to exit inrush mode, press inrush key more than one second. enter inrush mode in automatic aca modes will force the range to be locked in manual range. any change of the component value may have influence on the inrush characteristi c. so it?s not recommended to have any change on these component value. for inrush function, an external true rms - to - dc es6 ic must be required. the flow chart of inrush function is shown below. 3.8. zero f unction in manual dc 4.000a, 40.00 a, 400.0 a and 4000 a, auto dc 40.00a/ 400.0a , and auto dc 400.0a/ 4000a ( please refer to section 1.5) mesurement modes, ES236 provides z ero function to remove the residual current value. push rel key less than one second to enter zero mode. in zero mode , the lcd panel displays d n+k - d n , where n = 1, 2, 3, ? , d n is the last conversion value before rel key is pushed, and d n+k is the current conversion value. if rel key is pushed again in zero mode, the meter will refresh the d n value and displays the d n+ k - d n again . the meter returns to normal operation if rel key is pressed and held for longer than one second. pressing hold in zero mode makes the meter stop updating the lcd panel. in 2- range auto dca modes for clampmeter ( 400.0a/ 4000 a or 40.00 a/ 400.0 a), the system will stay in automatic mode, even if the zero function is activated. in other words, it could achieve real automatic operation. in automatic mode, zero function could not be entered from higher range, but it could be still activated if current range is lower one. this is because most residual current value is so small that the range could not be higher one in automatic mode. when enter zero mode from lower range, the system will store the nonzero counts (residual current value). if the range goe s up to higher one automatically, the nonzero counts will be divided by ten. so this function will still work well in automatic modes. normal state inrush mode wait ing s tate inrush mode lcd display : inrush v alue press inrush detected press inrush <1sec press inrush key >1sec
v 2. 2 26 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush ? state diagram for zero mode : ? state diagram for zero + hold mode : ? state diagram for zero + max/min + hold mode : original state ?zero? active show d n+k - d n press zero > 1s press zero press zero < 1s original state ?zero? active show d n+k - d n press zero > 1s press zero press zero < 1s ?zero? ?hold? active stop lcd upgrading press hold original state (auto/manual) ?zero? ?max? active show max. d n+k - d n zero max min blink. current d n+ k - d n ?zero? ?min? active show min. d n+k - d n push mmx push mmx > 1s push mmx ?zero? ?max? ?hold? active hold max. d n+k - d n val u e ?zero? ?min? ?hold? active hold min. d n+k - d n val u e zero , max , min , h blink . hold the current d n+k - d n push mmx push mmx push hold push hold push hold push mmx push rel push rel > 1s push mmx ?zero? active show d n+k - d n push rel < 1s
v 2. 2 27 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 3.9. vahz function when voltage or current measurement mode is selected, the vahz funtion is available. push h z key to select this frequency measurement mode. the frequency is measured by auto ranging. the maximum frequency ra nge is 60k hz. the sensitivity of signal input is 5 % full scale of signal in voltage or current mode typically . configuration range fr1 400.0 hz fr2 4.000 khz fr3 40.00 khz 4. serial data output the rs232 function will be activated if press down the rel key and last for 2 seconds , rs232 symbol will be show n on the lcd display. the serial data sent to sdo pin periodically at every a/d conversion cycle by 15 times per second . the data format complies with 8 bits transmission code with a baud rate of 9600. t he host can use rs232 interface to read the data. a single data packet includes a start bit (always 0), 8 data bits with no parity check bit, and a stop bit (always 1). the high and low voltage levels correspond to dgnd and v - respectively. sdo remains at 1 (high) when it is inactive. hence the start bit (0) could be used as the triggering signal to begin the reading process. the following figure shows the data format of a single packet. s ingle pack et 0 1 0v msb lsb -3v d7 d6 d5 d4 d3 d2 d1 d0 one data block consi sts of 17 packets. the following figure shows the format of a data block. the header and device code leads the whole packets. the range packet indicates the decimal point position on lcd panel of meter. main_ digit 1- 3 consist s of the readings on the lcd pan el. the function packet indicates the measurement mode of the meter. status 1- 4, unit and bargraph give the other status of the meter. cr and lf are delimiters used to separate the blocks.
v 2. 2 28 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush a ll pack ets 0 0 1 0 1 0 1 1 0 0 1 0 1 0 1 1 h e a d e r d e v i c e r a n g e m a i n _ d i g i t 1 m a i n _ d i g i t 2 m a i n _ d i g i t 3 f u n c t i o n 1 f u n c t i o n 2 f u n c t i o n 3 s t a t u s 1 u n i t b a r g r a p h c r l f s t a t u s 2 s t a t u s 3 s t a t u s 4 0 0 1 0 1 0 1 1 0 0 1 0 1 0 1 1 0 0 1 0 1 0 1 1 0 1 0 1 d 7 d 0 the meter always outputs the current value shown on lcd screen to the serial port. the detailed data format of each packet is listed below. d0 d1 d2 d3 d4 d5 d6 d7 a01 0 0 0 0 1 1 1 1 header a02 1 0 0 0 0 0 0 1 device a03 x x x x m_dp1 m_dp2 m_dp3 x range a04 m_sign x x x x x x x main_digit1 a0 5 digit3 3 digit3 2 digit3 1 digit3 0 digit2 3 digit2 2 digit2 1 digit2 0 main_digit2 a06 digit1 3 digit1 2 digit1 1 digit1 0 digit0 3 digit0 2 digit0 1 digit0 0 main_digit3 a07 v a ohm continuity diode capacitance hz duty function1 a08 va h z H inrush efmode scan clamp led function2 a0 9 adp0 adp1 adp 2 adp3 x x x x function3 a10 auto m a nu ac dc ol ul x x status1 a11 slb3 slb2 slb1 lbat30s bw _full x bw1k hold status2 a12 rel zero max min current x x x status3 a13 danger open short disch inrush_wait x x x status4 a14 mega kilo x m ili x m icro x n ano unit a15 b_sign x b<06> b<05> b<04> b<03> b<02> b<01> bargraph a1 6 0 0 0 0 1 1 0 1 cr a 17 0 0 0 0 1 0 1 0 lf not e 1. x ? undefind . 2. whole packet is shown by lsb first.
v 2. 2 29 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 4.1. range this packet indicates range state of the meter. the m_dp1 ? m_dp3 corresponding d p1 ? dp3 of lcd segment (see section 5 ) . i n dcv 4.000 v range, this a03 packet will set xxxx001x. if change to 40.00 v the packet will be xxxx010x. d0 d1 d2 d3 d4 d5 d6 d7 a03 x x x x m_dp1 m_dp2 m_dp3 x 4.2. m ain_d igit 1 ?m ain_d igit 3 m ain_d igit 1 ? m ain_d igit 3 is the readings of measurement result shown on lcd panel. digitn 3 ? digitn 0 consist of 4- bit bcd code . th e m_sign is the sign bit of readings. d0 d1 d2 d3 d4 d5 d6 d7 a04 m_sign x x x x x x x a0 5 digit3 3 digit3 2 digit3 1 digit3 0 digit2 3 digit2 2 digit2 1 digit2 0 a06 digit1 3 digit1 2 digit1 1 digit1 0 digit0 3 digit0 2 digit0 1 digit0 0 4.3. function th e packet s of a07- a09 indicate the measurement mode of the meter. the following table summarizes the transmitted bit for each mode. note that the encoding of this packet is different from the encoding of fc1 - fc5 switch . for example, if the meter operates in voltage mode, this a07 packet is 1000 0000. if va h z key is pushed to vahz mode , the a08 will be 10000000 also. d0 d1 d2 d3 d4 d5 d6 d7 a07 v a ohm continuity diode capacitance hz duty a08 va h z H inrush efmode scan clamp led a0 9 adp0 adp1 adp2 adp3 x x x x 4.4. status the a10 - a13 packets indicate the whole status when ES236 is in normal operation. for example, if meter is operated at acv / m a nu range, then a10 packet will set 011000xx . the format of th e four packets are shown below. d0 d1 d2 d3 d4 d5 d6 d7 a10 auto m a nu ac dc ol ul x x a11 slb3 slb2 slb1 lbat30s bw _full x bw1k hold a12 rel zero max min current x x x a13 danger open short disch inrush_wait x x x
v 2. 2 30 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush auto : when auto range is s elected. m a nu : when manual mode is selected. ac : when ac mode is selected. dc : when dc mode is selected. ol : when ? ol ? is displayed on lcd. ul : when ? ul ? is displayed on lcd. slb3/slb2/slb1 : when low battery segment is shown on lcd. lbat30s : when ? l obt ? is shown on lcd. bw1k/full : indication of low - pass - filter 3db bandwidth. hold : when data hold mode is active. rel : when relative mode is active. zero : when zero mode is active. max/min/current : when max/min mode is active. if current=1 means max/min symbol is blinking on lcd. clamp : when clamp current mode is selected. inrush : when inrush mode is active. inrush_wait : when inrush mode is waiting for trigger. danger : hazard voltage warning symbol is active on lcd. open : open state is detected on scan mode. short : short circuit is detected on continuity or diode mode. disc : t h e ? disc ? is shown on lcd. it means the dut is necessary to be discharged on cap mode. 4.5. unit t his packet indicates the measurement unit of the lcd display . d0 d1 d2 d3 d4 d5 d6 d7 a14 mega kilo x m ili x m icro x n ano 4.6. bargraph the a15 packet is the readings of bar - graph shown on lcd panel. b06 ? b01 consist of 6 - bit unsigned binary code. the b_sign is the sign bit of bar - graph. the result is necessary to be divided by 2 to match the bar - grap h of lcd panel. the format of this pack et is shown below . d0 d1 d2 d3 d4 d5 d6 d7 a15 b_sign x b0 6 b05 b04 b03 b02 b01
v 2. 2 31 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 4.7. cr carriage return : the transmitted code is 00 001101. 4.8. lf line feed : the transmitted code is 00001010. 5. miscellaneous the condit ions, which the meter turns on the buzzer, include: (1) changing measurement mode generates one beep. (2) pressing any of the push functions generates one beep, if the function is valid. (3) power on and re - power on generate one beep. (4) input overflow in voltage and current mode generates one beep every 0.3 seconds (or 3.33 beeps per second.) (5) continuity(diode) check generates a continuous 2khz beep whenever the measurement is less then 30(30mv) (6) auto power off generates a 2khz beep which lasts for 1.5 seconds. the following figures show the output waveform from the buzout pin. 0.5 ms (a) continuous 2khz beep 0.3 sec 0.15 sec (b) 3.33 beep/sec
v 2. 2 32 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 5.1. lcd panel s01 s02 s03 s04 s05 s06 s07 s08 s09 s10 s11 s12 s13 s14 s15 bp1 slb1 apo scan auto inrush 4f 4a 4b hold 3f 3a 3b buz 2f 2a bp2 slb2 rs232 man ac minus 4e 4g 4c dp3 3e 3g 3c dp2 2e 2g bp3 slb3 danger bar0 dc bar3 b ar 4 4d b ar 6 bar 7 bar 9 3d bar1 1 bar1 2 bar1 3 2d bp4 bar - bar1 bar2 b ar 5 bar 8 bar1 0 bar 14 s16 s17 s18 s19 s20 s21 s22 s23 s24 s25 s26 s27 s28 s29 bp1 2b diode 1f 1a 1b rel led 2 m n vin adp0 bp2 2c dp1 1e 1g 1c max full m2 k 1 com adp1 bp3 bar 15 bar 17 bar 18 1d bar2 0 min H v m1 main adp2 bp4 bar 16 bar 19 % 1k a hz f ain adp3 lcd backplane waveform bp1 bp2 bp3 bp4 v - +3.1 v - v - +3.1 v - v - +3.1 v - v - +3.1 v -
v 2. 2 33 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 5.2. lcd d isplay o n c ondition lcd annunciator condition v in voltage measurement mode, and diode measurement mode. a in current measurement mode. in resistance measurement mode, and continuity mode. f in capacitance measurement mode. in continuity check mode. in diode mode. % in duty cycle measurement. hz in frequency mode. adp 0 when adp 0 mode is active . adp 1 when adp 1 mode is active . adp 2 when adp 2 mode is active . adp 3 when adp 3 mode is active . dc in dc voltage or dc current mode. ac in ac voltage or ac current mode. auto when automatic full scale range selection is enabled. manu in manual mode. hold when hold function is enabled. when relative fun ction is enabled. m ax when m ax function is enabled. min when min function is enabled. inrush when inrush function is enabled . scan when smart (resistance, continuity, diode, capacitance auto check mode) is active. m 1 in capacitor measurement mode and the full scale range is in the order of mf. 1 in capacitor measurement mode and the full scale range is in the order of uf. n in capacitor measurement mode and the full scale range is in the order of nf. m 2 in voltage or current measurement mode and th e full scale range is in the order of 10 -3 . 2 in current measurement mode and the full scale range id in the order of ua. m in resistance measurement mode and the full scale range is in the order of m . k in resistance measurement mode and the full sca le range is in the order of k . in temperature measurement mode and when the unit is . H in temperature measurement mode and when the unit is H . when the reading is exceeding default hazardous live voltage or ol in d c v o r a c v, the hv warning symbol will be display. apo when auto power off function is enabled. slb 1 when voltage (ref. to v - ) of lbat9 pin is less than vt1, slb1 will disappear. slb 2 when voltage (ref. to v - ) of lbat9 pin is less than vt2, slb2 will dis appear. slb 3 when slb2 disappears for 8 seconds, slb3 will be blinking. rs232 when rs232 output is enabled. test when led measurement function is enabled .
v 2. 2 34 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush 5.3 operating timing ES236 incorporates a dual slope adc with fou r phases: zi, az, int and dint. the timing of each phase are listed below. (1) voltage / diode /adp / manual current (for clampmeter) measurement: phase high resolution high speed zi 5 0ms 5ms az 25ms 2.5ms int 100ms 10ms dint 1 55ms 15.5ms (2) current mode for multimeter/auto current mode for clampmeter/2 - range auto voltage mode: phase dc / ac dc lower range zi 5 0ms 5 0ms az 25ms 25ms int 100ms 1000 ms dint 155ms 175ms (3) continuity / ohm measurement: phase time zi 5 0ms az 100ms int 25ms * dint 155ms no te : int time = 250ms for 40.00 ? range (4) capacitance measurement: range total measurement time 4.000 nf 0.3 6 sec 40.00 nf 0.3 6 sec 400.0 nf 1.15 sec 4.000 f 1.15 sec 40.00 f 0. 33 sec 400.0 f 3.3 sec (max) 4.000 mf 1.32 sec (max) 40.00 mf 13.2 sec (max) (5) frequency / duty cycle / vahz measurement: every conversion takes 1.05 second. (6) temperature measurement : every conversion takes 1.25 second . note: 1. in the frequency measurement with auto mode, if the range is changed, the internal clock rate will increase ten times and the new measurement cycle becomes 1/10 times of the original cycle until the range is stable.
v 2. 2 35 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush ? application circuit 1. t ure rms circuit (support es 5 only) 1 2 3 4 5 6 a b c d 6 5 4 3 2 1 d c b a title num b e r revision size b date : 6-mar-2015 sh ee t of file: d:\protel 99\protel file\ka035\ka035_spec.ddb drawn by : trms ( es5 ) demo bo ard circuit v1 jack chang es 23 6 + c2 10uf + c3 10uf z r2 7 . 5v v + c7 0.1uf c6 0.1uf z r1 5 . 6v sw1 power switch v - ba t- ba t+ bz1 bu zz e r v - r9 10k r10 10k b zo u t q1 2n3906 d1 bkout r1 100k v - b ko u t r11 100 d2 hv r2 100k v - alarm r12 100 q3 2n3904 q2 2n3904 d3 sh or t r3 100k v - alarm1 r13 100 q8 2n3904 v - v + c20 100nf c19 220nf r30 470k c18 100nf c22 47nf c16 22nf c23 1 uf c21 220nf r32 1 00 r33 1 k r35 101k r36 1.111m precision resistors ovsg r34 10.01k r37 10m bot t om polygon plane mvi n c24 2.2nf c25 300pf c26 1 nf c9 470nf r21 9k c29 220pf r24 2 00 c22 cl os e t o i c c12 0-100pf c11 0-100pf r25 2 00 r23 180k v r1 sleep c alenp sda p sclp b zo u t b ko u t alarm1 alarm s eg2 0 s eg2 1 s eg2 2 s eg2 3 s eg1 6 s eg1 7 s eg1 8 s eg1 9 s eg1 2 s eg1 3 s eg1 4 s eg1 5 s eg0 8 s eg0 9 s eg1 0 s eg1 1 s eg0 4 s eg0 5 s eg0 6 s eg0 7 s eg0 3 s eg0 2 s eg0 1 b p4 b p3 b p2 b p1 seg28 seg27 s eg2 6 s eg2 5 s eg2 4 seg29 c es e l s el 2 s el 1 dis a pos el tsel v st vbar rs232 y1 4 mh z key b kl i t i r h/ p e k f c5 range h ol d f c2 f c3 f c4 f c1 rsout m mx r el slacdc hz lbat9 c8 470nf r14 200 r15 2 . 2k p tc + c10 2.2uf q4 2n3904 q7 2n3904 q5 2n3904 q6 2n3904 vr_clamp daco v rh v r1 2k r22 900 v r2 200 a0 1 a1 2 a2 3 g nd 4 sda 5 scl 6 wp 7 v cc 8 u2 24a02 v - r19 47k c alenp sda p sclp r20 47k acvh c17 10nf r29 470k c15 22nf c14 22nf r5 100k a dp t em p in v r_ a dp r6 100k r4 100k i vs c13 22nf buff in 1 nc 2 common 3 output offset 4 cs 5 den input 6 nc 7 ca v 8 r ms o ut 9 - vs 10 + vs 11 nc 12 vin 13 buff out 14 u3 es5 v s + v s - r26 100k r27 4 . 7k v r3 500k + c31 4.7uf v s + v s - + c4 10uf + c5 10uf v s + v s - metallized polypropylene film capacitor : c19 metallized polyester capacitor : c9, c14 , c18, c20 r8 100k vin 1 1 gnd 1 fin dc 3.0v r17 2 .2k ptc r18 2 .2k ptc q10 2n3904 q9 2n3904 q12 2n3904 q11 2n3904 q14 2n3904 q13 2n3904 r16 2 .2k ptc sw1 6 r c_ s w sw3 fc5 sw4 fc4 sw2 sl acd c f c4 f c5 slacdc v - sw5 fc3 sw6 fc2 sw7 fc1 f c1 f c2 f c3 sw8 hz sw1 0 rel sw1 1 i rh/ p e k sw9 m mx hz i r h/ p e k r el m mx v - sw1 2 bkl i t b kl i t sw1 3 key sw1 4 h ol d h ol d key sw1 5 range range 1 j4 1 j5 sw1 8 ua sw1 9 ma ua/ ma ua/ ma /a ua ma d5 f? f? a 1 j6 com r38 99 r39 0 . 99 r40 0 . 01 d4 d6 d7 acvh cshp 127 cln 10 cshn 128 ivs 1 a dp 2 chp 5 chn 6 cih 7 bufh 8 cil 12 caz h 9 clp 11 caz l 13 bufl 14 raz 15 v rh 16 vr_clamp 18 o hm c4 20 o hm c3 21 o hm c2 22 o hm c1 23 o vsg 24 o r1 25 v r4 27 v r3 28 v r2 29 acvl 30 v r5 26 acvh 31 a di 32 a do 33 test5 34 sgn d 35 v r1 36 lpfout 38 mvi n 37 lpc1 39 lpc2 40 lpc3 41 can 42 cap 43 r1 0k 44 r1k 45 o vx 46 o vh 47 ovh1 48 sleep 49 freq 50 calenp 51 sda p 52 bzout 54 bkout 55 alarm1 56 alarm 57 bp4 58 bp3 59 bp2 60 bp1 61 se g2 9 62 se g2 8 63 seg2 6 65 seg2 5 66 seg2 4 67 seg2 3 68 seg2 2 69 seg2 1 70 seg2 0 71 seg1 9 72 seg1 8 73 seg1 7 74 seg1 6 75 seg1 5 76 seg1 4 77 seg1 3 78 seg1 2 79 seg1 1 80 seg1 0 81 seg0 9 82 seg0 8 83 seg0 7 84 seg0 6 85 seg0 5 86 seg0 4 87 seg0 3 88 seg0 2 89 seg0 1 90 cese l 91 sel 2 92 sel 1 93 d is 94 tsel 95 v st 96 aposel 97 vbar 98 rs232 99 o sc2 1 00 o sc1 1 01 t em pin 3 clampi n 4 vr_adp 19 rsout 1 02 inrush 103 hz 104 m mx 105 rel 106 bkl i t 107 key 108 h ol d 109 range 110 fc5 111 fc4 112 fc3 113 fc2 114 fc1 115 sl acd c 116 cn 117 cp 118 lbat9 119 v- 120 v- 121 v+ 122 v+ 123 dgnd 124 agnd 125 agnd 126 d aco 17 sclp 53 se g2 7 64 u1 ES236 fi xed 1k fi xed 10 k a di sw1 7 acv_sw sw2 0 clampin r7 10k c27 220pf a di c31 22uf
v 2. 2 36 2015 / 1 2 / 15 es 23 6 4000 counts dmm / inrush ? package information 1. 128l l qfp outline drawing 2. dimension parameters

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