SJ 20253-1993 Verification procedures for HP435B power indicator

SJ 20253-1993 HP435B Power Indicator Verification Procedure SJ20253-1993 Standard download decompression password: www.bzxz.net

Military Standard of the Electronic Industry of the People's Republic of China FL0150
SJ20253—93
HP435B Power Indicator
Verification Regulation
Verification regulation of
model HP435B power meter
1993—02—09 Issued
China Electronics Industry Corporation
1993—05—01 Implementation
Military Standard of the Electronic Industry of the People's Republic of China HP435B Power Indicator
Verification Regulation
Verification regulation of
model HP43SB power meter
1 Scope
1.1 Subject Content
SJ20253—93
This verification procedure specifies the verification conditions, verification items, verification methods, verification result processing and verification cycle of HP435B power indicator. 1.2 Scope of Application
This verification procedure is applicable to the verification of HP435B power indicator. Other similar power indicators can also be verified with reference to this procedure. 2 Reference Documents
No provisions in this chapter.
3 Definitions
No provisions in this chapter.
4-General requirements
China Electronics Industry Corporation 1993-02-09 Issued 1
1993-05-01 Implementation
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SJ20253-93
4.1 Purpose and principle of the inspected measuring instrument
HP435B power indicator and power head are used to measure power. The power head converts RF power proportionally into DC voltage. The HP435B power indicator measures the RF power value by measuring the size of the converted DC voltage. 4.2 Technical requirements
4.2.1 Reference signal
Output frequency: 50=0.5MHLz
Input power: 1mW ±1.2%.
4.2.2 Zero-range conversion error
0.5% full scale.
4.2.3 Power indication error
Main 1% full scale.
4.2.4 Calibration coefficient error
4.3 Verification conditions
4.3.1 Environmental conditions
: Ambient temperature: 23±2℃;
b. Relative humidity: 45%~75%:
c. Atmospheric pressure: 86~106KPa1
d. Power supply: 220V±2%, 50Hz±1%. e. Surrounding environment:
, no direct sunlight, no mechanical vibration and electromagnetic field interference that affect the work of the belt.
4.3.2 Verification equipment
4. 3. 2. 1 Range calibrator
Calibration uncertainty: ±0.25% (full scale); output voltage and power indicator ranges correspond to each other; reference model: HP11683A.
4.3.2.2 Digital multimeter
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DC voltage: 0.1~100V±0.07%:
Resistance: 0~3000±0.07%;
Resolution: 5×10~;
Input impedance: ≥10MO;
Reference model: ·1905a or 8840A.
4.3.2.3 Thermal power head
Standing wrinkle ratio: 1.05 (50MHz);
Accuracy: ±0.5% (50MHz);
Reference model: HP478A-75,
4.3.2.4 Test power meter
Conversion accuracy: ±0.2%:
Reference model:
4.3.2.5 Counter
Frequency range: 200Hz~50MHz
Accuracy: ±0.01%;
Reference model: HP515.
5 Detailed requirements
5.1 Verification items and verification methods
5.1.1 Appearance and normal working inspection
5.1.1.1 The inspected HP435B power indicator (hereinafter referred to as the inspected instrument) shall be accompanied by the product technical manual and necessary accessories. If it is not the first verification, the previous verification certificate shall be attached.
5.1.1.2 The inspected instrument shall have no mechanical damage that affects normal operation and correct reading. 5.1.2 Verification of reference signal output rate
5.1.2.1 Connect the meter as shown in Figure 1.
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Tested Instrument
SJ20253--93
Reference Output
Counter
5.1.2.2 Directly measure the frequency of the reference signal by the counter1. And record the measurement results in Appendix A (Supplementary) Table A1. bzxZ.net
5.1.2.3 Calculate the error of the output frequency by formula (1)4. Record the results in Table A1.
Where: 4——Output frequency error:
f—Nominal value of output frequency (50MHz): f—Actual value of output frequency.
5.1.3 Verification of reference signal output power
5.1.3.1 Connect the measuring instrument according to Figure 2.
1st pin
Test power meter
Digital multimeter
5.1.3.2 In order to accurately determine the output power of the reference signal, first measure the bridge arm resistance of the test power meter, as shown in Figure 2. Remove the power head and use the ohm function of the digital multimeter to measure the internal bridge arm resistance R of the indicator between the V socket on the rear panel of the indicator and the first pin connected to the power head (the resistance reading is kept to two decimal places). 4
Record the measurement results in Table A1.
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5.1.3.3 Connect the measuring instrument according to Figure 3. Turn off the reference output of the instrument under test. Hot compress
Tested power group
Xin power output
Power head
Power meter
H digital sub
Multimeter
5.1.3.4 Adjust the calibration coefficient of the test power meter to 50MH, the calibration coefficient value CF at the bottom, first perform coarse zero adjustment, then perform fine zero adjustment on the minimum range, and finally turn the range switch to 1mw.
5.1.3.5 As shown in Figure 3, set the digital multimeter to the voltage function and micro-optimal range, and use the digital meter to measure the voltage between the sockets V and V. 5.1.3.6 If the digital multimeter indicates less than 400μV, proceed to 5.1.3.7. If the digital multimeter indicates more than 400uV, perform the test power meter "fine zero adjustment" and adjust its "coarse zero adjustment" at the same time, so that the digital multimeter indicates 200mV less, then release the "fine zero adjustment" and turn off.
5.1.3.7 Correctly adjust the range of the digital multimeter and observe the indication value V. of the digital multimeter at this time and record it in Table AI.
5.1.3.8 Set the reference output of the instrument under test to the open state, read the indication value V of the digital multimeter, and record the result in Table A1. 5.1.3.9 As shown in Figure 3, remove the lead connected to Vr and transfer it to the ground wire "female socket. Then, read the indication value Ve of the digital multimeter and record the result in Table Al.
5.1.3.10 Calculate the actual value PRF of the reference signal output power according to formula (2) and record the result in Table AI.
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Per - 2Vex(Vl-Vo)+Ve-V
1*****(2)
Where: Vc, V, V:. The meanings of R and CF are as described above. 5.1.3.11. Calculate the error 4 of the reference signal output power according to formula (3). Record the result in Table A1.
1mWPz×100%
5.1.4 Verification of zero-point range conversion error
5.1.4.1 Connect the measuring instrument according to Figure 4.
Adapter
Tested instrument
...(3)
Digital meter
Record output
5.1.4.2: Set the calibration coefficient of the tested instrument to 100%, set the range switch to the bottom position in the counterclockwise direction (this position is recorded as range 1), set the reference power switch to the "OFF\ position, and set the range of the digital meter to 100mVpc. 5.1.4.3 Press and hold the fine zero adjustment switch on the front panel of the instrument under test, wait for the digital meter reading to stabilize, at which point the digital meter reading should be less than or equal to 0.9mVc, and then release the fine zero adjustment switch.
5.1.4.4 Turn the range switch of the instrument under test from the counterclockwise position to the clockwise position in sequence: and note and record the digital meter reading Dt under each range, and record the D1 value under each range in Table A2. 5.1.5 Verification of power indication error
5.1.5.1 Connect the meter according to Figure 5.
Range calibrator
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Variable testing instrument
Record output
Digital multimeter
5.1.5.2 Set the range switch of the range calibrator to 1mW. Set the function switch to Calibrate and the polarity switch to Normal. Set the range switch of the digital multimeter to 1000mVc. Set the range switch of the instrument under test to the range 5 position. 5.1.5.3 Adjust the calibration potentiometer (CAL ADJ) on the front panel of the instrument under test so that the digital multimeter indicates 1000 ± 2mV
5.1.5.4 As shown in Table A3, start from the counterclockwise position and move the range switches of the range calibrator and the instrument under test in the clockwise direction one by one. Record the reading D of the digital multimeter under each range and record the result in Table A3.
5.1.6 Verification of calibration coefficient
5.1.6.1 Connect the measuring instrument according to Figure 5.
5.1.6.2 Set the range switch of the range calibrator to \1mW”. Set the function switch to calibration push and the polarity switch to normal.
5.1.6.3 Set the calibration coefficient switch of the instrument under test to 100% and the range switch to range 5.
5.1.6.4 Adjust the calibration potentiometer on the front panel of the instrument under test so that the digital multimeter indicates 1000±2mVx.
5 .1.6.5 Starting from 100%, adjust the position of the calibration coefficient switch of the instrument under test in sequence until it reaches 85%, and at the same time record the reading D of the digital multimeter under each corresponding calibration coefficient, and record D in Table A4. 5.2 Verification result processing and verification cycle
5.2.1 For the HP435B power indicator that has been verified, a verification certificate shall be issued; for those that fail to meet the standards, a verification result notice shall be issued, and the unqualified items shall be indicated. 5.2.2 The verification cycle is one year, and it can be sent for inspection at any time if necessary. 7
TTTKAON KAca
Output frequency
Output power Pr
Bridge arm electric medicine R
Range 1
Range 2
Range 4
Range 5
Range 6
Range?
Range 8
Range 9
Range 10
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Thank you A| |tt||Format of calibration record
(Supplement)
Calibration of reference signal
Actual value
Calibration of zero-range conversion error
Reading D of digital multimeter
Actual value
Calibrated range
Range of the instrument under test
Range 1
Range 2
Range 3
Range 4
Range 5
Range 6
Range 7
Range B
Range 9
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Calibration of power indication error
Reading of digital multimeter
Actual value
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Tested instrument
Calibration coefficient switch
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Calibration coefficient verification
Digital square meter reading
Measured value
Additional instructions:
SJ2025393
This standard is proposed by the Science and Technology Quality Bureau of China Electronics Industry Corporation. This standard is under the jurisdiction of China Electronics Technology Standardization Institute. This standard was drafted by the Thirteenth Institute of the Ministry of Machinery and Electronics Industry. The main drafter of this standard is Gao Jinliang.
Participating drafter of this standard: Zheng Yanqiu.
Project code: 075-1~47.
YKAONIKAca-2 The calibration cycle is one year and can be sent for inspection at any time if necessary. 7
TTTKAON KAca
Output frequency
Output power Pr
Bridge arm current R
Range 1
Range 2
Range 4
Range 5
Range 6
Range?
Range 8
Range 9
Range 10
SJ20253—93
Thank you A
Format of calibration record
(Supplement)
Calibration of reference signal
Actual value
Calibration of zero-range conversion error
Reading of digital multimeter D
Actual value
Difficult range to be calibrated
Range of the instrument under test
Range 1
Range 2
Range 3
Range 4
Range 5
Range 6
Range 7
Range B
Range 9
SJ20253--93
Verification of power indication error
Digital multimeter reading
Actual value
TYKAON KACa-
Tested instrument
Calibration coefficient switch
SJ20253-93
Verification of calibration coefficient
Digital multimeter reading
Actual value
Additional remarks:
SJ2025393
This standard is proposed by the Science and Technology Quality Bureau of China Electronics Industry Corporation. This standard is under the jurisdiction of China Electronics Technology Standardization Institute. This standard was drafted by the 13th Research Institute of the Ministry of Machinery and Electronics Industry. The main drafter of this standard is Gao Jinliang.
Participating drafter of this standard: Zheng Yanqiu.
Project code: 075-1~47.
YKAONIKAca-2 The calibration cycle is one year and can be sent for inspection at any time if necessary. 7
TTTKAON KAca
Output frequency
Output power Pr
Bridge arm current R
Range 1
Range 2
Range 4
Range 5
Range 6
Range?
Range 8
Range 9
Range 10
SJ20253—93
Thank you A
Format of calibration record
(Supplement)
Calibration of reference signal
Actual value
Calibration of zero-range conversion error
Reading of digital multimeter D
Actual value
Difficult range to be calibrated
Range of the instrument under test
Range 1
Range 2
Range 3
Range 4
Range 5
Range 6
Range 7
Range B
Range 9
SJ20253--93
Verification of power indication error
Digital multimeter reading
Actual value
TYKAON KACa-
Tested instrument
Calibration coefficient switch
SJ20253-93
Verification of calibration coefficient
Digital multimeter reading
Actual value
Additional remarks:
SJ2025393
This standard is proposed by the Science and Technology Quality Bureau of China Electronics Industry Corporation. This standard is under the jurisdiction of China Electronics Technology Standardization Institute. This standard was drafted by the 13th Research Institute of the Ministry of Machinery and Electronics Industry. The main drafter of this standard is Gao Jinliang.
Participating drafter of this standard: Zheng Yanqiu.
Project code: 075-1~47.
YKAONIKAca-
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