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keysight E4981A capacitance meter data sheet
02 | keysight | E4981A capacitance meter - data sheet definitions and specifications this document provides specifications and supplemental information for the keysight technologies, inc. E4981A capaci - tance meter. all specifications apply to the conditions of a 0 c to 45 c temperature range, unless otherwise stated, and 30 minutes after the instrument has been turned on. warranted performance. specifications include guard bands to account for the expected statistical performance distribution, measurement uncertainties, and changes in performance due to environmental conditions. supplemental information is intended to provide information that is helpful for using the instrument but that is not guaranteed by the product warranty. describes performance that will be met by a minimum of 80% of all products. it is not guaranteed by the product warranty. a general descriptive term that does not imply a level of performance. the available frequency is defined as follows. E4981A-001: 120 hz/1 khz/1 mhz/1 mhz 1%/1 mhz 2% E4981A-002: 120 hz/1 khz the information regarding frequency 1 mhz/1 mhz 1%/1 mhz 2% in speci - fications, supplemental and general information in not valid for the E4981A - 002. C cp-d, cp-q, cp-rp, cp-g C cs-d, cs-q, cs-rs where cp: capacitance value measured using the parallel equivalent circuit model cs: capacitance value measured using the series equivalent circuit model d: dissipation factor q: quality factor (inverse of d) g: equivalent parallel conductance measured using the parallel equivalent circuit model rp: equivalent parallel resistance measured using the parallel equivalent circuit model rs: equivalent series resistance measured using the series equivalent circuit model definitions specification (spec.): typical (typ.): nominal (nom.): option dependencies basic specifications measurement parameters
03 | keysight | E4981A capacitance meter - data sheet specifications measurement frequency allowable frequencies 120 hz 1 khz 1 mhz 0.98 mhz (1 mhz C 2%) 0.99 mhz (1 mhz C 1%) 1.01 mhz (1 mhz + 1%) 1.02 mhz (1 mhz + 2%) accuracy 0.02% level range 0.1 v to 1 v resolution 0.01 v accuracy 5% output mode continuous or synchronous source delay time 1 range 0 to 1 s resolution 0.1 ms measurement signals 1. source delay time is effective when output mode is set to synchronous mode.
04 | keysight | E4981A capacitance meter - data sheet measurement signal frequency: 120 hz 10 nf 22 nf 47 nf 100 nf 220 nf 470 nf 1 f 2.2 f 4.7 f 10 f 22 f 47 f 100 f 220 f 470 f 1 mf measurement signal frequency: 1 khz 100 pf 220 pf 470 pf 1 nf 2.2 nf 4.7 nf 10 nf 22 nf 47 nf 100 nf 220 nf 470 nf 1 f 2.2 f 4.7 f 10 f 22 f 47 f 100 f measurement signal frequency: 1 mhz / 1 mhz 1% / 1 mhz 2% 1 pf 2.2 pf 4.7 pf 10 pf 22 pf 47 pf 100 pf 220 pf 470 pf 1 nf for information on measurable range in each measurement mode, refer to available measurement ranges (tables 2 through 4). 0 m, 1 m, 2 m 5 speeds measurement time mode n = 1, 2, 4, 6, 8 for information on the measurement time in each mode, refer to table 15 measurement time. auto, hold range 1 to 256 measurements resolution 1 measurement cable lengths: measurement time selection: measurement range selection: measurement range: averaging:
05 | keysight | E4981A capacitance meter - data sheet range 0 to 1 s resolution 0.1 ms trigger mode: internal trigger (int), manual trigger (man), external trigger (ext), gpib/usb/lan trigger (bus) trigger delay time: table 1 shows the range of the measured value that can be displayed on the screen. table 1. allowable measured value display range parameter measurement display range cs, cp 1.000000 af to 999.9999 ef d 0.000001 to 9.999999 q 0.01 to 99999.99 rs, rp 1.000000 a to 999.9999 e g 1.000000 as to 999.9999 es % 0.0001 % to 999.9999 % a: 1 x 10 -18 , e: 1 x 10 18 measurement display ranges
06 | keysight | E4981A capacitance meter - data sheet available measurement ranges tables 2 through 4 show recommended measurement ranges (recommended for accurate measurement) and significant measurement ranges (ranges that do not cause overload) for each measurement value under the condition d (dissipation factor) 0.5. table 2. measurable capacitance ranges when measurement frequency is 120 hz measurement range setting recommended measurement range significant measurement range 10 nf 0 f to 15 nf 0 f to 15 nf 22 nf 15 nf to 33 nf 0 f to 33 nf 47 nf 33 nf to 68 nf 0 f to 68 nf 100 nf 68 nf to 150 nf 0 f to 150 nf 220 nf 150 nf to 330 nf 0 f to 330 nf 470 nf 330 nf to 680 nf 0 f to 680 nf 1 f 680 nf to 1.5f 0 f to 1.5 f 2.2 f 1.5 f to 3.3 f 0 f to 3.3 f 4.7 f 3.3 f to 6.8 f 0 f to 6.8 f 10 f 6.8 f to 15 f 0 f to 15 f 22 f 15 f to 33 f 0 f to 33 f 47 f 33 f to 68 f 0 f to 68 f 100 f 68 f to 150 f 0 f to 150 f 220 f 150 f to 330 f 0 f to 330 f 470 f 330 f to 680 f 0 f to 680 f 1 mf 680 f to 2 mf 0 f to 2 mf
07 | keysight | E4981A capacitance meter - data sheet table 3. measurable capacitance ranges when measurement frequency is 1 khz measurement range setting recommended measurement range significant measurement range 100 pf 0 pf to 150 pf 0 f to 150 pf 220 pf 150 pf to 330 pf 0 f to 330 pf 470 pf 330 pf to 680 pf 0 f to 680 pf 1 nf 680 pf to 1.5 nf 0 f to 1.5 nf 2.2 nf 1.5 nf to 3.3 nf 0 f to 3.3 nf 4.7 nf 3.3 nf to 6.8 nf 0 f to 6.8 nf 10 nf 6.8 nf to 15 nf 0 f to 15 nf 22 nf 15 nf to 33 nf 0 f to 33 nf 47 nf 33 nf to 68 nf 0 f to 68 nf 100 nf 68 nf to 150 nf 0 f to 150 nf 220 nf 150 nf to 330 nf 0 f to 330 nf 470 nf 330 nf to 680 nf 0 f to 680 nf 1 f 680 nf to 1.5 f 0 f to 1.5 f 2.2 f 1.5 f to 3.3f 0 f to 3.3 f 4.7 f 3.3 f to 6.8 f 0 f to 6.8 f 10 f 6.8 f to 15 f 0 f to 15 f 22 f 15 f to 33 f 0 f to 33 f 47 f 33 f to 68 f 0 f to 68 f 100 f 68 f to 200 f 0 f to 200 f available measurement ranges (continued)
08 | keysight | E4981A capacitance meter - data sheet table 4. measurable capacitance ranges when measurement frequency is 1 mhz, 1 mhz 1%, 1 mhz 2% measurement range setting recommended measurement range significant measurement range 1 pf 0 f to 1 pf 0 f to 1 pf 22 pf 1 pf to 33 pf 0 f to 33 pf 4 pf 33 pf to 68 pf 0 f to 68 pf 10 pf 68 pf to 1 pf 0 f to 1 pf 22 pf 1 pf to 33 pf 0 f to 33 pf 4 pf 33 pf to 68 pf 0 f to 68 pf 100 pf 68 pf to 10 pf 0 f to 10 pf 220 pf 10 pf to 330 pf 0 f to 330 pf 40 pf 330 pf to 680 pf 0 f to 680 pf 1 nf 680 pf to 1 nf 0 f to 1 nf available measurement ranges (continued)
09 | keysight | E4981A capacitance meter - data sheet the measurement accuracy is defined when all of the following conditions are met: C warm-up time: 30 minutes or longer C ambient temperature: 18 c to 28 c C execution of open correction C execution of cable correction for 1 mhz measurement C measurement cable length: 0 m, 1 m, or 2 m (16048a/b/d) 1 C d (dissipation factor) 0.5 measurement accuracy 1. the outer conductor resistance of cable requires the following condition. %pruehor pruehor 2. if you select a secondary measurement parameter other than d, calculate d. accuracy of cp, cs, d, g, rs, q and rp tables 8 through 13 show the measurement accuracy of cp, cs, and d when table 14 shows the formula of the measurement accuracy of g, rs, q and rn khq :khqpxowlsowkhdffxudfrewdlqhglq7deohvwkurxjkewkh coefficient in table 5. table 5. dissipation factor coefficient parameter coefficient cp, cs, g, rs 2 1 + d 2 d 1 + d table 6. formula of the measurement accuracy of g, r s , q and r p parameter formula g e (g accuracy) (c e /100) 2 f c x rs e (r s accuracy) (c e /100) / (2 f c x ) q e (q accuracy) qx 2 de 1 qx de rp e (rp accuracy) rpx 2 ge 1 rpx ge c e : cp or cs accuracy [%] f: measurement frequency [hz] c x : measurement value of cp or cs [f] q x : measurement value of q rp x : 0hdvxuhphqwydoxhri5s de: d accuracy [%] basic accuracy (typical) c: 0.042%, d: 0.0003
10 | keysight | E4981A capacitance meter - data sheet when the ambient temperature exceeds the range of 18 c to 28 c, multiply the accuracy obtained above by the coefficient shown in the table below. table 7. temparature coefficient coefficient 0 c ambient temperature < 8 c 3 8 c ambient temperature < 18 c 2 18 c ambient temperature 28 c 1 28 c ambient temperature 38 c 2 38 c ambient temperature 45 c 3 accuracy when ambient temperature exceeds the range of 18 c to 28 c (typical) accuracy when an alternative current magnetic field is applied when an alternating current magnetic field is applied to the instrument. multiply the accuracy obtained in tables 8 through 13. 1+b (2+0.5 k) b: magnetic flux density [gauss] cx: measured value of the capacitance (cp or cs), cr: a measurement range [f] vs: a measurement signal level [v]. in tables 8 through 13, k is defined as follows: &[&u. 9v&u&[ cx > cr: k = 1/vs where cx is measured value of the capacitance (cp or cs), cr is a measurement range and vs is a measurement signal level [v].
11 | keysight | E4981A capacitance meter - data sheet measurement accuracy (continued) table 8. measurement accuracy of cp, cs (measurement frequency: 120 hz) cp, cs [%] measurement time mode (n) 1 2 4 6 8 10 nf 22 nf 47 nf 100 nf 220 nf 470 nf 1 f 2.2 f 4.7 f 10 f 22 f 47 f 100 f 0.055 + 0.030 k 0.055 + 0.022 k 0.055 + 0.018 k 0.055 + 0.016 k 0.055 + 0.015 k 220 f 470 f 1 mf 0.4 + 0.060 k 0.4 + 0.044 k 0.4 + 0.036 k 0.4 + 0.032 k 0.4 + 0.030 k table 9. measurement accuracy of d (measurement frequency: 120 hz) d measurement time mode (n) 1 2 4 6 8 10 nf 22 nf 47 nf 100 nf 220 nf 470 nf 1 f 2.2 f 4.7 f 10 f 22 f 47 f 100 f 0.00035 + 0.00030 k 0.00035 + 0.00022 k 0.00035 + 0.00018 k 0.00035 + 0.00016 k 0.00035 + 0.00015 k 220 f 470 f 1 mf 0.004 + 0.00060 k 0.004 + 0.00044 k 0.004 + 0.00036 k 0.004 + 0.00032 k 0.004 +0.00030 k
12 | keysight | E4981A capacitance meter - data sheet measurement accuracy (continued) table 10. measurement accuracy of cp, cs (measurement frequency: 1 khz) cp, cs [%] measurement time mode (n) 1 2 4 6 8 100 pf 0.055 + 0.070 k 0.055 + 0.047 k 0.055 + 0.036 k 0.055 + 0.033 k 0.055 + 0.030 k 220 pf 0.055 + 0.045 k 0.055 + 0.032 k 0.055 + 0.025 k 0.055 + 0.022 k 0.055 + 0.020 k 470 pf 1 nf 2.2 nf 4.7 nf 10 nf 22 nf 47 nf 100 nf 220 nf 470 nf 1 f 2.2 f 4.7 f 10 f 0.055 + 0.030 k 0.055 + 0.022 k 0.055 + 0.018 k 0.055 + 0.016 k 0.055 + 0.015 k 22 f 47 f 100 f 0.4 + 0.060 k 0.4 + 0.044 k 0.4 + 0.036 k 0.4 + 0.032 k 0.4 + 0.030 k table 11. measurement accuracy of d (measurement frequency: 1 khz) d measurement time mode (n) 1 2 4 6 8 100 pf 0.00035 + 0.00070 k 0.00035 + 0.00047 k 0.00035 + 0.00036 k 0.00035 + 0.00033 k 0.00035 + 0.00030 k 220 pf 0.00035 + 0.00045 k 0.00035 + 0.00032 k 0.00035 + 0.00025 k 0.00035 + 0.00022 k 0.00035 + 0.00020 k 470 pf 1 nf 2.2 nf 4.7 nf 10 nf 22 nf 47 nf 100 nf 220 nf 470 nf ) ) ) ) 0.00035 + 0.00030 k 0.00035 + 0.00022 k 0.00035 + 0.00018 k 0.00035 + 0.00016 k 0.00035 + 0.00015 k ) ) ) 0.004 + 0.00060 k 0.004 + 0.00044 k 0.004 + 0.00036 k 0.004 + 0.00032 k 0.004 + 0.00030 k
13 | keysight | E4981A capacitance meter - data sheet measurement accuracy (continued) table 12. measurement accuracy of cp, cs (measurement frequency: 1 mhz, 1 mhz 1%, 1 mhz 2%) cp, cs [%] measurement time mode (n) 1 2 4 6 8 1 pf 0.055 + 0.070 k 0.055 + 0.047 k 0.055 + 0.036 k 0.055 + 0.033 k 0.055 + 0.030 k 2.2 pf 0.055 + 0.045 k 0.055 + 0.032 k 0.055 + 0.025 k 0.055 + 0.022 k 0.055 + 0.020 k 4.7 pf 10 pf 22 pf 47 pf 100 pf 220 pf 470 pf 1 nf 0.055 + 0.030 k 0.055 + 0.022 k 0.055 + 0.018 k 0.055 + 0.016 k 0.0 55 + 0.015 k table 13. measurement accuracy of d (measurement frequency: 1 mhz, 1 mhz 1%, 1 mhz 2%) d measurement time mode (n) 1 2 4 6 8 1 pf 0.00035 + 0.00070 k 0.00035 + 0.00047 k 0.00035 + 0.00036 k 0.00035 + 0.00033 k 0.00035 + 0.00030 k 2.2 pf 0.00035 + 0.00045 k 0.00035 + 0.00032 k 0.00035 + 0.00025 k 0.00035 + 0.00022 k 0.00035 + 0.00020 k 4.7 pf 10 pf 22 pf 47 pf 100 pf 220 pf 470 pf 1 nf 0.00035 + 0.00030 k 0.00035 + 0.00022 k 0.00035 + 0.00018 k 0.00035 + 0.00016 k 0.00035 + 0.00015 k
14 | keysight | E4981A capacitance meter - data sheet accuracy (d) 0 0.0001 0.0002 0.0003 0.0004 0.0005 0.0006 0.0007 0.0008 0.0009 0.001 measurement value (cp, cs) [f] 1.0e-9 1.0e-8 1.0e-7 1.0e-6 1.0e-5 1.0e-4 1.0e-3 n = 8 n = 4 n = 1 figure 1. accuracy of d when measurement frequency is 120 hz (measurement range: 10 nf to 100 f / measurement signal level: 0.5 v) accuracy (cp, cs) [%] 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2 1.0e-9 1.0e-8 1.0e-7 1.0e-6 1.0e-5 1.0e-4 1.0e-3 measurement value (cp, cs) [f] n = 1 n = 4 n = 8 figure 2. accuracy of cp and cs when measurement frequency is 120 hz (measurement range: 10 nf to 100 f / measurement signal level: 0.5 v)
15 | keysight | E4981A capacitance meter - data sheet accuracy (d) 0.0042 0.0043 0.0044 0.0045 0.0046 0.0047 0.0048 0.0049 0.005 measurement value (cp, cs) [f] 0.0001 0.001 0.01 n = 8 n = 4 n = 1 figure 3. accuracy of d when measurement frequency is 120 hz (measurement range: 220 f to 1 mf / measurement signal level: 1 v) accuracy (cp, cs) [%] 0 0. 1 0. 2 0. 3 0. 4 0. 5 0. 6 0. 7 measurement value (cp, cs) [f] 0.0001 0.001 0.01 n = 8 n = 4 n = 1 accuracy of cp and cs when measurement frequency is 120 hz (measurement signal level: 0.5 v) figure 4. accuracy of cp and cs when measurement frequency is 120 hz (measurement range: 220 f to 1 mf / measurement signal level: 1 v)
16 | keysight | E4981A capacitance meter - data sheet accuracy (d) 0 0.0002 0.0004 0.0006 0.0008 0.001 0.0012 0.0014 0.0016 0.0018 0.002 measurement value (cp, cs) [f] 1.0e -11 1.0e -10 1.0e-9 1.0e-8 1.0e-7 1.0e-6 1.0e-5 1.0e-4 n = 8 n = 4 n = 1 figure 5. accuracy of d when measurement frequency is 1 khz (measurement range: 100 pf to 10 f / measurement signal level: 1 v) accuracy (cp, cs) [%] 0 0. 05 0. 1 0. 15 0. 2 0. 25 measurement value (cp, cs) [f] 1.0e -11 1.0e -10 1.0e-9 1.0e-8 1.0e-7 1.0e-6 1.0e-5 1.0e-4 n = 8 n = 4 n = 1 figure 6. accuracy of cp and cs when measurement frequency is 1 khz (measurement range: 100 pf to 10 f / measurement signal level: 1 v)
17 | keysight | E4981A capacitance meter - data sheet accuracy (d) 0 . 0 0 4 2 0 . 0 0 4 3 0 . 0 0 4 4 0 . 0 0 4 5 0 . 0 0 4 6 0 . 0 0 4 7 0 . 0 0 4 8 0 . 0 0 4 9 0 . 0 0 5 measurement value (cp, cs) [f] 0.00001 0.0001 0.001 n = 8 n = 4 n = 1 accuracy (cp, cs) [%] 0.42 0.43 0.44 0.45 0.46 0.47 0.48 0.49 0.5 measurement value (cp, cs) [f] 0.00001 0.0001 0.001 n = 8 n = 4 n = 1 figure 8. accuracy of cp and cs when measurement frequency is 1 khz (measurement range: 22 f to 100 f / measurement signal level: 1 v) figure 7. accuracy of d when measurement frequency is 1 khz (measurement range: 22 f to 100 f / measurement signal level: 1 v)
18 | keysight | E4981A capacitance meter - data sheet accuracy (cp, cs) [%] 0 0.05 0.1 0.15 0.2 0.25 measurement value (cp, cs) [f] 1 .0e - 1 3 1 .0e - 1 2 1 .0e - 1 1 1 .0e - 1 0 1.0e-9 1.0e-8 n = 1 n = 4 n = 8 figure 9. accuracy of cp and cs when measurement frequency is 1 mhz (measurement signal level: 1 v) accuracy (d) 0 0 . 0 0 0 2 0 . 0 0 0 4 0 . 0 0 0 6 0 . 0 0 0 8 0 . 0 0 1 0 . 0 0 1 2 0 . 0 0 1 4 0 . 0 0 1 6 0 . 0 0 1 8 0 . 0 0 2 measurement value (cp, cs) [f] 1.0e-13 1.0e-12 1.0e-11 1.0e-10 1.0e-9 1.0e-8 n = 1 n = 4 n = 8 figure 10. accuracy of d when measurement frequency is 1 mhz (measurement signal level: 1 v) sample calculation of measurement accuracy is described on page 31.
19 | keysight | E4981A capacitance meter - data sheet supplemental information e x t _ t r i g / i n d e x /eom /ready for_trig t 1 t 2 t4 t 5 t 3 figure 11. timing chart and measurement time measurement time output impedance frequency: 120 hz slc off ( 220 f range) slc on ( 220 f range) 2.2 f to 100 f range 10 nf to 1 f range 1.5 (nom.) 1 0.3 (nom.) 1 0.3 (nom.) 1 20 (nom.) 1 frequency: 1 khz slc off ( 22 f range) slc on ( 22 f range) 220 nf to 10 f range 100 pf to 100 nf range 1.5 (nom.) 1 0.5 (nom.) 1 0.3 (nom.) 1 20 (nom.) 1 frequency: 1 mhz / 1 mhz 2% / 1 mhz 1% 20 (nom.) 1 measurement signals 1. this value is defined without an extension cable.
20 | keysight | E4981A capacitance meter - data sheet table 14 shows the values of t1 C t5 when the following conditions are met: C display update: off C synchronous source: on C measurement range mode: hold range mode (hold) C source delay time: 0 ms C trigger delay time: 0 ms C averaging factor: 1 C slc: off C measurement time mode (n): 1 C correction: on C multi connection: on C lan: not connected table 14. values of t1 C t5 (typical) measurement frequency minimum value typical value t1 trigger pulse width n/a 1 s C t2 trigger response time of /ready_for_trig, /index and /eom n/a C 40 s (t3 + t4) measurement time t3 analog measure - ment time 120 hz 1 khz 1 mhz C C C 10.0 ms 2.0 ms 1.3 ms (t3 + t4) measurement time t4 measurement computation time n/a C 1.0 ms t5 trigger wait time n/a 0 sec C
21 | keysight | E4981A capacitance meter - data sheet display time except in the case of the display blank page, the time required to update the display on each page (display time) is as follows (table 15). when the screen is changed, drawing time and switching time are added. the measurement display is updated about every 100 ms. table 15. display time item time meas display page drawing time 10 ms meas display page (large) drawing time 10 ms bin no. display page drawing time 10 ms bin count display page drawing time 10 ms measurement display switching time 35 ms table 16 shows the measurement time (t3 + t4) for each measurement time mode. table 16. measurement time frequency measurement time [ms] 120 hz (n 8.3 ave + 2.7) 0.5 1 khz (n 1.0 ave + 2.0) 0.5 1 mhz / 1 mhz 1% / 1 mhz 2% (n 1.0 (100/(100 + fshift )) ave + 1.3) 0.5 measurement time mode (n) = 1, 2, 4, 6, 8 ave: averaging factor fshift : frequency shift setting measurement time
22 | keysight | E4981A capacitance meter - data sheet table 17 shows the measurement data transfer time under the following condi - tions. the measurement transfer time varies with the measurement conditions and computer used. C host computer: dell precision 390, 1.86 ghz/windows xp C usb gpib interface card: 82350a C usb gpib interface: e2078a C display: on C measurement range mode: hold range mode (hold) C open/short/load correction: off C measurement signal monitor: off C bin count function: off table 17. measurement data transfer time (typical) interface data transfer format using: fetc? command (one point measurement) using: read command (one point measurement) using data buffer memory (1000 measurement points (buffer3)) comparator on [ms] comparator off [ms] comparator on [ms] comparator off [ms] comparator on [ms] comparator off [ms] gpib ascii 1 1 3 3 202 186 ascii long 1 1 3 3 247 231 binary 1 1 3 4 145 111 usb ascii 1 1 4 4 101 94 ascii long 1 1 4 4 121 114 binary 1 1 4 4 43 33 lan ascii 3 3 5 5 158 146 ascii long 3 3 6 6 193 181 binary 5 5 7 7 105 79 measurement data transfer time
23 | keysight | E4981A capacitance meter - data sheet measurement assistance functions measurement assistance functions correction function C open/short/load correction are available C the offset correction is available multi correction function C open/short/load correction for 256 channels C the load correction standard value can be defined for each channel cable correction funtion cable correction is available deviation measurement function deviation from reference value and percentage of deviation from the reference value can be outputted as the result comparator function C bin sort: the primary parameter can be sorted into 9 bins, out_of_bins, aux_bin, and lowc_or_nc. the secondary parameter can be sorted into high, in, and low. C limit setup: an absolute value, deviation value, and % deviation value can be used for setup C bin count: countable from 0 to 999999 low c reject function extremely low measured capacitance values can be automatically detected as measurement errors contact check function the contact check function is available on 120 hz and 1 khz single level compensation C slc function compensates the voltage drop by the resistance inside the E4981A and the extension cable under the following frequencies and ranges C measurement cable: 16048a or 16048d C when the measurement frequency is 120 hz: 220 f range, 470 f range, 1 mf range C when the measurement frequency is 1 khz: 22 f range, 47 f range, 100 f range 1 10 100 10000 c d ut [ uf ] C30 C25 C20 C15 C10 C5 0 5 10 v er r [ %] s i g na l l ev el e r r o r (120 hz) s l c : o f f s l c : o n d = 0 d = 0 . 2 d = 0 . 5 0 . 1 1 10 100 1000 c d ut [ uf ] C30 C25 C20 C15 C10 C5 0 5 10 v er r [ %] s i g na l l ev el e r r o r (1 khz) s l c : o n d = 0 d = 0 . 2 d = 0 . 5 s l c : o ff
24 | keysight | E4981A capacitance meter - data sheet measurement assistance functions measurement signal level monitor function C measurement voltage and measurement current can be monitored C level monitor accuracy (typical): (3% + 1 mv) data buffer function up to 1000 measurement results can be read out in batch save/recall function C up to 10 setup conditions can be written to/read from the built-in nonvolatile memory C up to 10 setup conditions can be written to/read from the external usb memory C auto recall function can be performed when the setting conditions are written to register 9 in the built-in non-volatile memory key lock function the front panel keys can be locked gpib interface complies with ieee488.1, 2 and scpi usb host port universal serial bus jack, type-a (4 contact positions, contact 1 is on your left); female; for connection to usb memory device only note: the following usb memory can be used. C complies with usb 1.1; mass storage class, fat16/fat32 format; maximum consumption current is below 500 ma C recommended usb memory: 4 gb usb flash memory (keysight pn 1819-0637) C use the prepared usb memory device exclusively for the E4981A; otherwise, other previously saved data may be cleared. if you use a usb memory other than the recommended device, data may not be saved or recalled normally. C keysight will not be responsible for data loss in the usb memory caused by using the E4981A usb interface port C universal serial bus jack, type mini-b (4 contact positions); complies with usbtmc-usb488 and usb 2.0; female; for connection to the external controller. C usbtmc: abbreviation for usb test & measurement class lan interface C 10/100 baset ethernet, 8 pins; two speed options C compliant with lxi standard (lan extensions for instrumentation): version 1.2, class c C auto mdix handler interface the input/output signals are negative logic and optically isolated open collector signals C output signal: bin1Cbin9, out of bins, aux bin, p-hi, p-lo, s-reject, index, eom, alarm, ovld, low c reject or no contact, ready_for_trigger C input signal: keylock, ext-trigger scanner interface the input/output signals are negative logic and optically isolated open collector signals C output signal: index, eom C input signal: ch0 C ch7, ch valid, ext-trigger measurement circuit protection the maximum discharge withstand voltage, where the internal circuit remains protected if a charged capacitor is connected to the unknown terminal, is illustrated below. note: discharge capacitors before connecting them to the unknown terminal or a test fixture. table 18. maximum discharge withstand voltage (typical) maximum discharge withstand voltage range of capacitance value c of dut 1000 v c < 2 f 2/c v c 2 f
25 | keysight | E4981A capacitance meter - data sheet figure 13. maximum discharge withstand voltage (typical) voltage [v] 0 200 400 600 800 1000 1200 capacitance [f] 1 p 10 p 100 p 1 n 10 n 100 n 1 10 100
26 | keysight | E4981A capacitance meter - data sheet general specifications power source voltage 90 vac to 264 vac frequency 47 hz to 63 hz power consumption maximum 150 va operating environment temperature 0 c to 45 c humidity ( 40 c, no condensation) 15% to 85% rh altitude 0 m to 2000 m storage environment temperature C20 c to 70 c humidity ( 65 c, no condensation) 0% to 90% rh altitude 0 m to 4572 m other weight 4.3 kg (nominal) display lcd, 320 x 240 (pixel), rgb color outer dimensions 370 (width) x 105 (height) x 405 (depth) mm (nominal) note: effective pixels are more than 99.99%. there may be 0.01% or smaller missing pixels or constantly lit pixels, but this is not a malfunction.
27 | keysight | E4981A capacitance meter - data sheet 367.43 27 22 22 22 40.1 55.15 27.28 27.53 103.76 55.01 40.1 338.57 14.43 14.43 figure 14. dimensions (front view, with handle and bumper, in millimeters, nominal) 319.08 27 22 22 22 30.3 55.15 17.99 21.79 87.72 32.02 367.43 41.67 24.75 58.1 42.64 31 15.5 28.05 52.35 10.39 113.85 70.07 71.03 17.63 332.17 41.65 37.65 36.72 101.58 40.43 39.38 17.63 figure 16. dimensions (rear view, with handle and bumper, in millimeters, nominal) figure 15. dimensions (front view, without handle and bumper, in millimeters, nominal)
28 | keysight | E4981A capacitance meter - data sheet 319.08 41.62 24.8 51.54 88.28 36.04 31 15.5 24.04 47.44 10.37 107.38 63.47 71.03 32.87 28.37 32.71 31.24 30.1 401.95 79.76 141.49 103.78 55.03 101.58 373.96 19.72 50.9 88.28 10.45 347.85 15.65 21.91 21.92 45.72 84.43 figure 19. dimensions (side view, without handle and bumper, in millimeters, nominal) figure 18. dimensions (side view, with handle and bumper, in millimeters, nominal) figure 17. dimensions (rear view, without handle and bumper, in millimeters, nominal)
29 | keysight | E4981A capacitance meter - data sheet description specification emc european council directive 2004/108/ec iec 61326-1:2012 en 61326-1:2013 cispr 11:2009 +a1:2010 en 55011: 2009 +a1:2010 group 1, class a iec 61000-4-2:2008 en 61000-4-2:2009 4 kv cd / 8 kv ad iec 61000-4-3:2006 +a1:2007 +a2:2010 en 61000-4-3:2006 +a1:2008 +a2:2010 3 v/m, 80-1000 mhz, 1.4 - 2.0 ghz / 1v/m, 2.0 - 2.7 ghz, 80% am iec 61000-4-4:2004 +a1:2010 en 61000-4-4:2004 +a1:2010 1 kv power lines / 0.5 kv signal lines iec 61000-4-5:2005 en 61000-4-5:2006 0.5 kv line-line / 1 kv line-ground iec 61000-4-6:2008 en 61000-4-6:2009 3 v, 0.15-80 mhz, 80% am iec 61000-4-8:2009 en 61000-4-8:2010 30a/m, 50/60hz iec 61000-4-11:2004 en 61000-4-11:2004 0.5-300 cycle, 0% / 70% ices-001:2006 group 1, class a aas/nzs cispr11:2004 group 1, class a kn11, kn61000-6-1 and kn61000-6-2 group 1, class a emc, safety, environment and compliance
30 | keysight | E4981A capacitance meter - data sheet description specification safety european council directive 73/23/eec, 93/68/eec iec 61010-1:2001 en 61010-1:2001 measurement category i pollution degree 2 indoor use iec60825-1:1994 class 1 led can/csa c22.2 61010-1-04 measurement category i pollution degree 2 indoor use weee european council directive 2002/96/ec emc, safety, environment and compliance continued
31 | keysight | E4981A capacitance meter - data sheet sample calculation of measurement accuracy this section describes an example for calculating the measurement accuracy of each measurement parameter, assuming the following measurement conditions sample C measurement signal frequency: 1 khz C measurement signal level: 0.5 v C measurement range: 10 nf C measurement time mode: n = 1 C ambient temperature: 28 c when measurement parameter is cp-d (or cs-d) the following is an example for calculating the accuracy of cp (or cs) and d, assuming that measured result of cp (or cs) is 8.00000 nf and measured result of d is 0.01000. from table 7, the equation to calculate the accuracy of cp (or cs) is 0.055 + 0.030 k and the equation to calculate the accuracy of d is 0.00035 + 0.00030 k the measurement signal level is 0.5, the measurement range is 10 nf, and the measured result of cp (or cs) is 8.00000 nf. therefore, k = (1/0.5) (10/8.00000) = 2.5 substitute this result into the equation. as a result, the accuracy of cp (or cs) is 0.055 + 0.030 2.5 = 0.13% and the accuracy of d is 0.00035 + 0.00030 2.5 = 0.0011 therefore, the true cp (or cs) value exists within 8.00000 (8.00000 0.13/100) = 8.00000 0.0104 nf that is, 7.9896 nf to 8.0104 nf and the true d value exists within 0.01000 0.0011 that is, 0.0 0 8 9 to 0.0111
32 | keysight | E4981A capacitance meter - data sheet the following is an example for calculating the accuracy of cp (or cs) and q, assuming that measured result of cp (or cs) is 8.00000 nf and measured result of q is 20.0. the accuracy of cp (or cs) is the same as that in the example of cp-d. from table 8, the equation to calculate the accuracy of d is 0.00035 + 0.00030 k substitute k = 2.5 (same as cp-d) into this equation. the accuracy of d is 0.00035 + 0.00030 2.5 = 0.0011 then, substitute the obtained d accuracy into equation 1. the accuracy of q is (20.0)2 0.0011/(1 + 20.0 0.0011) = 0.44/(1 + 0.022) that is, C0.43 to 0.45 therefore, the true q value exists within the range of 19.57 to 20.45 when measurement parameter is cp-q (or cs-q)
33 | keysight | E4981A capacitance meter - data sheet the following is an example for calculating the accuracy of cp and g, assuming that measured result of cp is 8.00000 nf and measured result of g is 1.00000 s. the accuracy of cp is the same as that in the example of cp-d. from table 11, the equation to calculate the accuracy of g is (3.5 + 2.0 k) cx substitute k = 2.5 (same as cp-d) and 8.00000 nf of the measured cp result into this equation. the accuracy of g is (3.5 + 2.0 2.5) 8.00000 = 68 ns (0.068 s) therefore, the true g value exists within 1.00000 0.068 s that is, 0.932 s to 1.068 s when measurement parameter is cp-g
34 | keysight | E4981A capacitance meter - data sheet the following is an example for calculating the accuracy of cp and rp, assuming that measured result of cp is 8.00000 nf and measured result of rp is 2.00000 m. the accuracy of cp is the same as that in the example of cp-d. from table 11 the equation to calculate the accuracy of g is (3.5 + 2.0 k) cx substitute k = 2.5 (same as cp-d) and 8.00000 nf of the measured cp result into this equation. the accuracy of g is (3.5 + 2.0 2.5) 8.00000 = 68 ns then, substitute the obtained g accuracy into equation 2. the accuracy of rp is (2 10 6 ) 2 68 10 C9 /(1 + 2 10 6 68 10 C9 ) = 0.272 10 6 /(1 + 0.136) that is, C0.23944 m to 0.31481 m therefore, the true rp value exists within 1.76056 m to 2.31481 m when measurement parameter is cp-rp
35 | keysight | E4981A capacitance meter - data sheet 35 when measurement parameter is cs-rs the following is an example for calculating the accuracy of cp and rs, assuming that measured result of cs is 8.00000 nf and measured result of rs is 4.00000 k. because the cs accuracy is d = 2 freq cs rp = 2 10 3 8 10 C9 4 10 3 = 0.2 > 0.1 multiply 0.13% (the result obtained for cs-d) by 1 + d2. the result is 0.13 (1 + 0.22) = 0.1352% from table 11 the equation to calculate the accuracy of rs is (90 + 50 k)/cx substitute k = 2.5 (same as cs-d) and 8.00000 nf of the measured cs result into this equation. the accuracy of g is (90 + 50 2.5)/8.00000 = 26.875 because d > 0.1, multiply the result by 1 + d2 as in the case of cs. the final result is 27.95 . therefore, the true cs value exists within 8.00000 (8.00000 0.1352/100) = 8.00000 0.01082 nf that is, 7.98918 nf to 8.01082 nf and the true rs value exists within 4.00000 0.02795 k that is, 3.97205 to 4.02795 k
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