SJ 20240-1993 Verification Procedure for HP4284A Precision LCR Tester
Some standard content:
Military Standard of the Electronic Industry of the People's Republic of China FL0150
SJ20240—93
HP4284A Precision LCR Tester
Verification Regulation
Verification Regulation of Model HP4284A LCR Precision Measurement Instruments1993—02—09Released
China Electronics Industry Corporation
1993—05—01Implementation
Military Standard of the Electronic Industry of the People's Republic of China HP4284A Precision LCR Tester
Verification Regulation
Verification Regulation of Model HP4284ALCR Precision Measurement Instruments instruments1 Scope
1.1 Subject
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This verification procedure specifies the verification conditions, verification items, verification methods, verification result processing and verification cycle of HP4284A precision LCR tester (hereinafter referred to as HP4284A).
1.2 Scope of application
This verification procedure is applicable to the verification of HP4284A precision LCR tester. The same type of instruments can also be verified by referring to this procedure. 2 Referenced documents
There are no provisions in this chapter.
3 Definitions
There are no provisions in this chapter.
China Electronics Industry Corporation Issued on February 9, 1993 Implemented on May 1, 1993
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4 General requirements
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4.1 Purpose and principle of the inspected measuring instruments
HP4284A is a general-purpose LCR tester, suitable for testing L, C, R components, materials and semiconductor devices. The measurement frequency range is 20Hz~1MHz, and the basic accuracy of C-D measurement is ±0.05% (C), ±0.0005 (D). The measurement results are directly displayed on the LCD screen with a six-digit resolution. It also has functions such as comparison, classification and frequency sweep test, and can be used with other devices to achieve fully automated component testing, classification and product quality control.
The instrument adopts vector voltage and current measurement method, and uses four-terminal pairs to connect the measured components, which can effectively eliminate the influence of distributed capacitance, residual resistance and inductance, thereby ensuring a high measurement accuracy.
4.2 Technical requirements
4. 2. 1 Measurement function
4. 2, 1. 1 Measurement parameters
ZI, IYI, L, C, R, GD, QR.R., X, B, o.4. 2.1. 2 Parameter combination mode
4.2.1.3 Measurement equivalent circuit
Parallel and series.
4.2.1.4 Test cable length
Standard is 0m and 1m.
4.2.1.5 Measurement rate
Slow, medium and fast.
4.2.2 Test signal
4. 2.2.F Particle rate
D, QR.R..G
Frequency range: 20Hz～1MHz Total 8610 selectable frequency points: 2
Accuracy: Main 0.01%.
4.2.2.2 Signal level
Voltage: 5mV～2V:
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Accuracy: soil (10% + 1mV):
Current: 50gA ~ 20mA:
Accuracy: = (10% + 10μA).
4.2.3 Measurement range
zRX0.01mn ~ 99.9999Mo
IY., G, B: 0. 01nS ~ 99. 9999S
C: 0.01IF ~ 99.9999F
L: 0.01nH ~ 99.9999kH
D: 0.000001 ~ 9.99999
Q: 0. 01 ~ 99999. 9
0: 180. 000° ~ 180.000°
A%：-999.999%999.999%
4.2.4 Measurement Accuracy
The following conditions must be met for the measurement accuracy verification: (1) Warm-up time ≥30min.
(2) Measurement cable length: 0m, 1m.
If 2m.4m cable is selected, the test signal voltage and frequency should meet the requirements of page 10 of Chapter 9 of the manual.
(3) Open circuit and short circuit calibration have been performed.
(4) Bias current is set to QFF.
(5) The test signal voltage and DC bias voltage should be set according to Figure B on page 11 of Chapter 9 of the manual.
4.2.4.1 Total Uncertainty
The total uncertainty of a.IZi, IYI.LC.RXC and B is given by the following formula. A.+A. ... ()
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Formula 4. is the accuracy. A: a is the calibration uncertainty. When Dx 0.1, for L, CX, B, A should be multiplied by the factor Vi-D
When Qx ≥ 0.1, for R, G, A should be multiplied by the factor V1Q, hD The total uncertainty is given by the following formula.
D,+fml ...
In the formula, D. is the measurement accuracy of the D value, and 0 is the calibration uncertainty (radians). When Dx (measured value) ≥ 0.1, 0 should be multiplied by (1+Dx). 4. 2. 4.2 Accuracy
a.ZI.YL, CR, X and B The uncertainty is given by the following formula. A,=±A+(K,+K,+Kb×KbXK.)×100+K,)XK.(%).
Wherein: A—basic accuracy;
K,K, impedance proportionality coefficient,
+*+*. (3)
Kd, K. Kh——cable length coefficient (see the instruction manual for details); K—parallel/short circuit calibration coefficient:
K.——--temperature coefficient.
bD dimension accuracy
D,=±A,/100 (absolute D value)
When Dx≥0.1, D, should be multiplied by (1Dx)4.3 Verification conditions
4.3.1 Environmental conditions
a. Ambient temperature: 20±2℃:
b. Relative sensitivity, 45%～~75%;
c. Atmospheric pressure: 86~106kPa
d. Power supply: 220V±2%, 50Hz±1%: ++*.(4)
e. Surrounding environment: no mechanical vibration, impact and electromagnetic field4
interference that may affect the normal operation of the instrument.
4.3.2 Calibration equipment
4.3.2.1 Digital rate meter
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Frequency range: 20Hz~1MHz;
Accuracy: ≤±1×10-5,
Reference model: E312.
4.3.2.2 Voltmeter
Frequency range: 20Hz~1MHz;
AC effective value voltage range: 5mV~20V; DC voltage range: 40~40V:
AC measurement accuracy: soil 3.0%;
DC measurement accuracy, ±0.1%;
Reference model: HP3458A, 7150 and DA-16. 4.3.2.3 Standard capacitor bank| |tt||Capacitance: lpF, 10pF, 100pF, 1000pF, 0.01μF, 0.1μF, lμF calibration accuracy: ±0.01%;
Reference model: HP16380A, HP16380C4.3.2.4 standard resistor group
Resistance value: 1000, 1,0kz
Calibration accuracy: ±0.01%;
Reference model: HP16074A.
4.3.2.5 Converter and test cable
Reference model: HPPN1250—0080, HPPN1250-0781HP PN 1251-2277, HP PN 8120-1838HP16048A.
5 Detailed requirements
5.1 Verification items and verification methods
5.1.1 Appearance and working normality inspection
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5.1.1.1 The inspected instrument should be accompanied by the product technical manual and necessary accessories. If it is not the first calibration, the previous calibration certificate should be attached.
5.1.1.2 The instrument under inspection should have no mechanical damage that affects its normal operation, and the instrument should be able to work normally after power is turned on.
5.1.1.3 The instrument under test must be placed under the calibration environment conditions for 24 hours before it can be calibrated. 5.1.2 Test signal frequency accuracy verification
5.1.2.1 Preheat the instrument for more than 30 minutes after turning on the power. 5.1.2.2 Connect the instrument as shown in Figure 1.
BNC-BNC cable aCem
5.1.2.3 Reset the HP4284A system.
HP4284A
a. Press the MEASSETUPMENU key and the instrument displays the MEASSET UP page.
b. Press the CURSOR key to move the cursor to the SYSMENL (menu column) area.
c. Press the [more1/2] software to display ESYSTEMKEEFT in the lower left corner of the instrument to reset the system.
d. Press the SYSTEMRESET soft key,
e. Press the YESI soft key and the system will be reset. 5.1.2.3 Verify the frequency at the verification points specified in Table 1 and record the frequency meter reading in Table AI of Appendix A (Supplement).
Rate point
20klEs
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Test frequency and qualified range
Qualified range
0.9999~1.m1kHz
7. 9592~8. 12008k1z
19.998~2n.002kHz
79. 992--80. 008kHx
399. 96 ~ 40, 04kHz
0.9999k1z1.0001MHz
5.1.3 Verification of signal level and level monitor Connect the instrument as shown in Figure 2.
5. 1. 3. 1
Converter
HP3458A
Voltmeter
BINC coaxial cable
5-1.3.2 Set the voltmeter to the ACV position.
5.1.3.3 Reset HP4284A according to 5.1.2.3. 5.1.3.4 Set HP4284A as follows: FREQ (frequency): 1.25kHz
HI-PW (high voltage): OFF
HP4284A
Three-way light connector
5.1.3.5 Make the instrument display MEASDISPLAY (measurement single display) negative. Set the oscillation level according to Table 2 and record the voltmeter reading and the voltage monitor display 5.1.3.6
value in Appendix A, Table A2.
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Level verification point and qualified range of level monitor (HI-PWOFF) Test level point
Qualified range
Voltmeter reading limit
10=2mV
20±3mV
50±6rsV
100±11mV
200±21mV
250±26mV
500±51mV
1V±0m
2V±201mV
Note: 1>MR is the voltmeter reading.
Level monitor reading limit
MRP±(3%+0.5mV)
5.1.3.7 Set the test frequency to 960kHz. Repeat 4.1.3.6. 5.1.3.8 Set HI-PW to ON and record the voltmeter readings and level monitor display values in Appendix A Table A2 at the points specified in Table 3 at frequencies of 1.25kHz and 960kHz respectively.
Test level and qualified range of level monitor (HI-PWOV) Test level point
Standard voltage
Voltmeter reading limit
10=2mV
2.5±0.26V
20±2.01V
5.1.4 DC bias voltage accuracy verification
Connect the instrument as shown in Figure 3.
5. 1. 4. 1
Level monitor reading limit
MR =(3%+0. 5mV)
MR ±t3% +0. 5mV)
MR+(3%+5mV)
MR±(3%5mV)
HP5458A
Electrical meter
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2 Set the voltmeter to the DCV position.
5. 1. 4. 2
5.1.4.3 Reset the HP4284A system according to Section 5.1.2.3. 5.1.4.4 Set the instrument status as follows: TestSignalLevel (test signal level): 0V; HighPowerOption (high voltage option): OFF; DC Bias (DC bias): ON.
HP4278A
5.1.4.5 Perform calibration according to the bias voltage value specified in Table 4 and record the voltmeter reading in Table A3 of Appendix A.
High voltage selection
DC bias level verification
Storage level
Qualified range
1.425~1.575
1. 9 ~2. 1
0. 0010--—0.010
0. 0989~0.1011
1.9970-2.0030
5.9920--6.0080
13. 98114. 019
29. 960-30. 040
39. 950-~ 40 050)
[h1rF,989
—2,0030~—1.9970
—6.0089~—5.9920
-14. 019~—13, 981
：30.040~—20,960
- 40. 050~ 39, 950
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3. 1.4. 6 If the device is equipped with 001 high voltage option, set H1-PW to 0N. Then calibrate according to the calibration points specified in Table 4 and record the voltmeter readings in Appendix A Table A3. 5.1.5 Verification of impedance measurement accuracy
5.1.5. 1 Connect the standard device according to Figure 4.
Standard instrument
5.1.5.2 Reset the HP4284A system according to 5.1.2.3. 5.1.5.3 Press the MEAS SETUP MENUA key, then press the [CORRECTION] key to display the calibration page.
5.1.5.4 Connect the open terminator to the Unknown test input of the HP4284A.
5.1.5.5 Move the cursor to OPEN and press the [MEASOPEN] key to store the open circuit correction data (wait for about 90 seconds). 5.1.5.6 Connect the short-circuit terminator to the Unknown terminal of HP4284A. 5.1.5.7 Move the cursor to SHORT and press the [MEAS SHORT] key to store the short circuit correction data.
3.15.8 Put the HP4284A into manual trigger mode. 5.1.5.9 According to the signal level and test frequency specified in Table 5-1, connect 10pF, 100pF and 1000pF standard capacitors to the Unknown terminal of the instrument respectively. Perform calibration in manual trigger mode. Record the measured readings in Table A4-I of Appendix A. 5.1.5.10 According to the signal level and frequency specified in Table 5-2, connect 0.01μF, 0.1μF and 1μF standards to the Unknown terminal of the instrument respectively and calibrate in manual trigger mode. 10
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Record the measured readings at each point in Appendix A Table A42. Table 5-1
Signal setting
Impedance accuracy verification points and their qualified ranges (C,LD)
ltpP standard instrument
12. 5kHz Cjc.V.±0.6318F
±0.6G031
100pF standard instrument
CV ±1.759pF
±0.01739
C. V, +. 312pF
= t. 04293
CV±o.137uF
43kHxGp C. V, +u.U2462FI CV ±G. 162pF=0. 0190
96klIz
G,IC. V. ±i.1275pF
Cr'CY +. 0249pF
1kHz iCr
±0. 0n38
Cp/CV ±b. 2pF
1kHzCp
CV -0.122pF
+ 0. 0116
CV -0. 112pP
CV ±u. BS8pF
CV ±0. 208F
CV +0. 293pF
1MHxCpC.V. The calibration value of a.029?pF
CV±0.152pF
CV standard at 1kHz.
CVCV value multiplied by 1.003.
Table 5-2
Signal setting
5t ri v
1000pF standard
cV±a2.9pF
±0.00319
CV ±3. 05pF
Main core.D0286
CV ±1.00pF
= 0. 000a1
C. V, =1. 13pF
±0.00095
CV ±1.16p2
C, V. ±1. 31pF
CV'+I 53pF
± 0. 00083
CV ±2.53pF
CV'±2. 59pF
CV±1.48pF
C V.*+2. 03pF
Impedance accuracy verification point and its qualified range qualified model diagram (Cp）
.Standard
Center. 1μF standard
CV ± 0. 0052nF
CV±0.0R1nF
C. Vu+u, trInF
CV ±t.1814nF
CV +a. T132nF
Cv: Calibration value of standard at IklIz, *only applicable to 001 optional.
CV -). 13InF
1#E standard
C, V. ±.08inFwwW.bzxz.Net
CV ±6.67nF
CV ±1.31nF
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