SJ 20248-1993 Verification procedures for ED4070 dual-channel digital spectrum analyzer

SJ 20248-1993 Verification Procedure for ED4070 Dual Channel Digital Spectrum Analyzer SJ20248-1993 Standard download decompression password: www.bzxz.net

People's Republic of China Electronic Industry Military Standard FL0150
SJ20248—93
Verification regulation of
model ED4070 dual--channel
digital spectrum ahalyzers
1993—02--09 Issued
China Electronics Industry Corporation
1993—05--01 Implementation
People's Republic of China Electronic Industry Military Standard ED4070 dual-channel digital spectrum analyzer verification regulation
Verification regulation of
model ED4070 dual-channel
digital spectrum
1 Scope
1.1 Content
SJ20248—93
This verification procedure specifies the verification conditions, verification items, verification methods, verification result processing and verification cycle of ED4070 dual-channel digital spectrum analyzers. 1.2 Scope of application
This verification procedure is applicable to the verification of ED4070 dual-channel digital spectrum analyzers.
2 References
No provisions in this chapter.
3 Definitions
No provisions in this chapter.
4 General requirements
China Electronics Industry Corporation
1993-0209 Issued 1993-05-01 Implementation KAONKAca-
SJ20248-93
4.1 Purpose and principle of the inspected measuring instrument
ED4070 dual-channel digital spectrum analyzer (hereinafter referred to as the inspected instrument) is an instrument that uses the internationally widely used Fourier transform technology to perform various spectrum analyses on the collected low-frequency signals. This instrument has two channels and can analyze various transfer functions. It is widely used in non-photographic inspection and vibration analysis of machinery, transportation, and construction.
4.2 Technical requirements
4.2.1 Analysis frequency range and error
4.2.1.1 Analysis frequency range
Single channel (A channel): 0~5kHz, 0~ikHz; 0~5001z.0~100Hz..
Dual channel (AB channel): 0~1kHz, 0~500Hz, 0~100Hz. 4.2.1.2 Analysis frequency error
±0.5%±1 word.
4.2.2 Input signal voltage range
10mV~20V (peak-to-peak value);
Divided into 1, 2, 5 grades, a total of 11 grades. When the input signal is greater than 1/2.5 of each level (peak-to-peak value > voltage), it should be able to work normally.
4.2.3 Analysis speed
Single channel FFT analysis time: less than 15±1s Dual channel FFT analysis time: less than 30±15. 4.2.4 Trigger function
4. 2. 4. 1 Trigger mode
Start trigger
Press the start button to collect the measured signal. b. Preset trigger
0 Preset trigger: The trigger point is zero:
Preset 64-point trigger: The maximum number of preset points before triggering is 64 points; 2
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Preset 128-point trigger: The maximum number of preset points before triggering is 128 points. 4.2.4.2 Trigger level
High level trigger: It should be greater than 2/3 times the input level mark voltage to trigger Low level trigger: It should be no less than 0.032 times the input level mark voltage to trigger.
4.2.4 .3 Trigger polarity
Positive trigger: input positive signal to trigger; Negative trigger: input negative signal to trigger. 4.3 Calibration conditions
4.3.1 Environmental conditions
a. Ambient temperature: 20±2℃;
b. Relative humidity: 45%~75%;
c. Atmospheric pressure: 86~106kPa;
d. Power supply: 220V±2%, 50Hz mains: e. Surrounding environment: no direct sunlight, no mechanical vibration and electromagnetic field interference that may affect normal operation.
4.3.2 Calibration equipment
4.3.2.1 Standard Quasi-frequency meter
Frequency range: 10Hz5kHz#
Frequency accuracy: ±1×10-4±1 word; Frequency stability: ±1×10~/h
Reference model: E312 counting frequency meter. 4.3.2.2 Function generator
Frequency range: 0.0001Hz-5kHz
Frequency accuracy: 1×10-±1 word;
Frequency stability: 1×10-\/h;
Amplitude: 20Vp-p;
Reference model: YT1631 digital function generator, 3
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Sensitivity: 5mV/div~~5V/div=3%; Bandwidth: DC~20MHz;
Scanning mode, X-Y mode;
Reference model: VZ12 oscilloscope,
4.3.2.4 Voltmeter
AC voltage measurement range: 0~~20V (five gears) Frequency range: 10Hz~5kHz
Resolution 10μV;
Accuracy: ±0.3% (reading) ±0.2% (full scale): Reference model: HG1943 digital multimeter. 4.3.2.5 DC regulated power supply
Output voltage, 0~30V:
Wave voltage: ≤1mV (effective value):
Reference model: WYJ30 precision DC regulated power supply. 4.3.2.6 Stopwatch
Time accuracy: 2s/hl
Reference model: Shanghai Watch Factory No. 1 stopwatch. 5 Detailed requirements
5.1 Verification items and verification methods
5.1.1 Appearance and normal working inspection
5.1.1.1 The inspected instrument shall be accompanied by the product 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 its normal operation and correct reading, the buttons shall work normally, and all LED indicators on the panel shall display normally. 5.1.1.3 The instrument under test should be able to work normally after being powered on and preheated for 15 minutes. 5.1.2 Single-channel analysis rate range and error verification 4
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5.1.2.1 Connect the instrument according to Figure 1. The instrument under test is placed in the single-channel measurement position. DC regulated power supply
Function generator
Standard frequency meter
Display
Tested instrument
Printer
5.1.2.2 Adjust the DC regulated power supply voltage to 1V. The function generator outputs a 1Vp-p sinusoidal signal, and its frequency value is set according to the requirements of Appendix A (Supplementary Table A1). The frequency is calibrated with a standard frequency meter.
5.1.2.3 Tested instrument\auxiliary input attenuation\set to 2V;\frequency selection\set according to the requirements of Table A1, "Function key\set to linear spectrum, "display selection" set to A channel, \preset trigger\set points, respectively Display graphics and print data. 5.1.2.4 The instrument under test is connected to a DC regulated power supply and a function generator respectively, and the standard signal sent in is collected. After the collected waveform is observed on the oscilloscope, a linear spectrum is made. After the linear spectrum is observed, it is printed. The frequency value of the printed spectrum line is the frequency value of the measured signal.
5.1.2.5 Calculate the analysis frequency error according to the following formula + and record the verification results in Table A1. ff×100%
Where.f. Signal source output standard frequency value: f The nominal value of the frequency of the instrument under test
5.1.3 Dual-channel analysis frequency range and error verification 5. 1.3.1 Connect the instrument as shown in Figure 1. Place the instrument under test in the dual-channel (A, B channel) measurement position.
5.1.3.2 Repeat 5.1.2.2 to 5.1.2.5, and calibrate the A channel and B channel rate according to the requirements of Table A2. Record the calibration results in Table A2. 5
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5.1.4 Checking the input signal voltage range
5.1.4.1 Connect the instrument as shown in Figure 2. Place the instrument under test in the dual-channel (A,5.1.4.2 The function generator outputs a 200Hz sinusoidal signal, adjusts the voltage value according to the requirements of Table A3 (monitored by a voltmeter), and then inputs it to the A and B input terminals of the instrument under test. 5.1.4.3 The input attenuation level of the instrument to be tested shall be changed according to the requirements of Table A3. Set the "Analysis Frequency Range Key" to 1kHz, "Function Key" to transient recording, and "Display Selection Key" to A&.B. Start the acquisition. Channel A and Channel B should be displayed normally in the oscilloscope. Record the inspection results of Channel A and Channel B in Table A3.
5.1.5 Inspection of Analysis Speed
5.1.5.1 Connect the instrument according to Figure 3. The instrument under test covers the dual-channel (A and B channels) measurement position.
Function Generator
Instrument under Test
Oscilloscope
5.1.5.2 Inspection of Single-Channel FFT Analysis Time The function generator outputs a 100Hz sine signal with a voltage amplitude of 1VrP, which is sent to the A and B channels of the instrument under test at the same time. Set the frequency of the instrument under test to 1kHz, "Function Key" to transient recording, and "Display Selection Key" to Channel A. After starting the acquisition circuit, the oscilloscope displays the acquired transient state. Then set the "Function" to power spectrum, press the start button, and start timing with a stopwatch until the spectrum line appears on the oscilloscope. Record the single-channel measured analysis time. Record the inspection results in Table A4.
5.1.5.3 Inspection of dual-channel FFT analysis time Set the display selection key of the inspected instrument to A&B, repeat 5.1.5.2, record the dual-channel measured time, and record the inspection results in Table A4. 5.1.6 Inspection of trigger mode
5.1.6.1, inspection of start trigger function
. Connect the instrument according to Figure 3, and set the inspected instrument to the dual-channel (A and B channels) measurement position.
b. The function generator outputs a 100Hz sinusoidal signal with a voltage amplitude of 1Vp-P- and sends it to the A and B channels of the instrument under test at the same time. Set the frequency of the instrument under test to 1kHz. Set the function key to the transient recording position and the display selection key to A&B. Press the total clear key and then press the start key. It should be triggered. Start the acquisition circuit to record the input transient waveform, and the oscilloscope should be able to display the input sinusoidal signal. Record the inspection results in Table A5. 5.1.6.2 Inspection of preset trigger function
a. Connect the instrument according to Figure 4.
Function generator-instrument under test Oscilloscope
Printer
b. The function generator outputs a 100Hz sinusoidal signal with a voltage amplitude according to the voltage requirements of the full-scale value of each input level of the instrument under test. c. Set the frequency range key of the instrument under test to 1kHz, the function selection key to the transient recording position, and the trigger selection to 0 preset position. d.0 Pre-mask trigger inspection: Press the total clear key of the instrument under inspection, and then press the start key. Connect the input signal, and the collected sine signal can be displayed on the oscilloscope. Set the print key to the print position, and then press the start key to print out the data. The first point of the data is the 0 preset trigger point. Record the inspection results in Table A5. 7
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e. Check for 64-point preset trigger: Set the trigger selection to 64 points, repeat the previous item (d), and the maximum number of points between the first point of the printed data and the trigger point should be 64 points. Record the inspection results in Table A5.
f. Check for 128-point preset trigger: Set the trigger selection to 128 points, repeat item d, and the maximum number of points between the first point of the printed data and the trigger point should be 128 points. Record the inspection results in Table A5.
5.1.6.3 Check of trigger polarity and level
8. Connect the instrument according to Figure 4.
b. Check of positive trigger polarity and high level: Set the trigger level selection key of the instrument under test to positive polarity and high level. Press the total clear key of the instrument under test, and then press the start key (the instrument under test has been connected to the input signal). At this time, the collected sine signal can be seen on the oscilloscope. Its trigger point should be positive polarity and high level. The first point of the data printed by the printer is the trigger point, and its amplitude is greater than 2/3 times the voltage value of the input level of the instrument under test. The same applies to each input level. Record the inspection results in Table A6. C. Check of positive trigger polarity and low level: Repeat the previous item (b), and set the trigger selection key to the low level position. The amplitude of the first point of the printed data should not be less than 0.032 times the voltage value of the input level. Record the inspection results in Table A6. d. Trigger negative polarity, high level inspection: Repeat item b, set the trigger polarity key to the negative polarity position, the amplitude of the first point of the printed data is negative, and the absolute value of its amplitude should be greater than 2/3 times the input level of the instrument under inspection. Record the inspection results in Table A6. e. Trigger negative polarity, low level inspection, repeat item c, set the trigger polarity key to the negative polarity position. The first point of the printed data is negative polarity, and the absolute value of its amplitude should not be less than 0.032 times the voltage value of the input level of the instrument under inspection. Record the inspection results in Table A6.
5.2 Verification result processing and verification cycle
5.2.1 A verification certificate shall be issued for instruments that pass the verification; a verification result notice shall be issued for those that fail the verification, 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. 8
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Appendix A
Verification record table format
(Supplement)
Table AI Single channel analysis frequency range and error verification rate range
0～5kHz
D~1kHa
0~500Hz
0～00H
赫南申
497,5z
Nominal value
KAONTKAca|| tt||SJ20248-93
Table A2 Dual-channel analysis frequency range and error verification frequency range
(a~-1kHz
0~500Hz
0~100Hz
0~500Hx
0~100Hz
Standard value
Nominal value
Decrease in position
Signal rate
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Table A3 Input signal voltage range check
Input voltage (A, B)
BmV, 20mV
20mV, 50mV
40mV.100mV
80mV, 200mV
200mV.500mV
Measurement result A
Table A4 Analysis speed Check
Amplitude
Detected frequency
Single channel
Nominal channel
<15+18
Measurement result B
FFT analysis time
Dual channel
Actual differential value
Nominal value
<30+18
Actual value
TYKAOIKAca-3. Inspection of dual-channel FFT analysis time Set the display selection key of the instrument under test to A&B, repeat 5.1.5.2, record the actual measurement time of the dual channels, and record the inspection results in Table A4. 5.1.6 Inspection of trigger mode
5.1.6.1. Inspection of start trigger function
. Connect the instrument according to Figure 3, and set the instrument under test to the dual-channel (A and B channels) measurement position.
b. The function generator outputs a 100Hz sine signal with a voltage amplitude of 1Vp-P- and sends it to the A and B channels of the instrument under test at the same time. Set the frequency of the instrument under test to 1kHz. Set the function key to the transient recording position, and set the display selection key to A&B. Press the total clear key, and then press the start key. It should be triggered. Start the acquisition circuit to record the input transient waveform, and the oscilloscope should be able to display the input sine signal. Record the inspection results in Table A5. 5.1.6.2 Inspection of preset trigger function
a. Connect the instrument according to Figure 4.
Function generator - Oscilloscope of the instrument under test
Printer
b. The function generator outputs a 100Hz sine signal, and the voltage amplitude is output according to the voltage requirements of the full-scale value of each input level of the instrument under test. c. Set the frequency range key of the instrument under test to 1kHz, the function selection key to the transient recording position, and the trigger selection to the 0 preset position. d. Check the 0 preset trigger: Press the total clear key of the instrument under test, and then press the start key. Connect the input signal, and the collected sine signal can be displayed on the oscilloscope. Set the print key to the print position, and then press the start key to print out the data. The first point of the data is the 0 preset trigger point. Record the inspection results in Table A5. 7
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e. Checking the preset 64-point trigger: Set the "trigger selection" to the 64-point position, repeat the previous item (d), and the maximum preset between the first point of the printed data and the trigger point should be 64 points. Record the inspection results in Table A5.
f. Checking the preset 128-point trigger: Set the "trigger selection" to the 128-point position, repeat item d, and the maximum preset between the first point of the printed data and the trigger point should be 128 points. Record the inspection results in Table A5.
5.1.6.3 Checking the trigger polarity and level
8. Connect the instrument according to Figure 4.
b, Checking the positive polarity and high level of the trigger: Set the trigger level selection key of the instrument under test to positive polarity and high level. Press the total clear key of the instrument under test, and then press the start key (the instrument under test has been connected to the input signal). At this time, the collected sine signal can be seen on the oscilloscope. Its trigger point should be a positive polarity high level. The first point of the data printed by the printer is the trigger point, and its amplitude is greater than 2/3 times the voltage value of the input level of the instrument under test. The same applies to each input level. The inspection results are recorded in Table A6. C. Trigger positive polarity, low level inspection: Repeat the previous item (b), and set the trigger selection key to the low level position. The amplitude of the first point of the printed data should not be less than 0.032 times the voltage value of the input level. The inspection results are recorded in Table A6. d. Trigger negative polarity, high level inspection: Repeat item b, set the trigger polarity key to the negative polarity position, and the amplitude of the first point of the printed data is negative. The absolute value of its amplitude should be greater than 2/3 times the input level of the instrument under test. The inspection results are recorded in Table A6. e. Trigger negative polarity, low level inspection, repeat item c, and set the trigger polarity key to the negative polarity position. The first point of the printed data is negative polarity, and the absolute value of its amplitude should not be less than 0.032 times the voltage value of the input level of the instrument under inspection. Record the inspection results in Table-A6.
5.2 Verification result processing and verification cycle
5.2.1 A verification certificate shall be issued for instruments that pass the verification; a verification result notice shall be issued for instruments that fail the verification, and the unqualified items shall be indicated. 5.2.2 The verification cycle is one year, and the instrument can be sent for inspection at any time if necessary. 8
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Appendix A
Verification record table format
(Supplement)
Table AI Single channel analysis frequency range and error verification rate range
0～5kHz
D~1kHa
0~500Hz
0～00H
赫南申
497,5z
Nominal value
KAONTKAca|| tt||SJ20248-93
Table A2 Dual-channel analysis frequency range and error verification frequency range
(a~-1kHz
0~500Hz
0~100Hz
0~500Hx
0~100Hz
Standard value
Nominal value
Decrease in position
Signal rate
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Table A3 Input signal voltage range check
Input voltage (A, B)
BmV, 20mV
20mV, 50mV
40mV.100mV
80mV, 200mV
200mV.500mV
Measurement result A
Table A4 Analysis speed Check
Amplitude
Detected frequency
Single channel
Nominal channel
<15+18
Measurement result B
FFT analysis time
Dual channel
Actual differential value
Nominal value
<30+18
Actual value
TYKAOIKAca-3. Inspection of dual-channel FFT analysis time Set the display selection key of the instrument under test to A&B, repeat 5.1.5.2, record the actual measurement time of the dual channels, and record the inspection results in Table A4. 5.1.6 Inspection of trigger mode
5.1.6.1. Inspection of start trigger function
. Connect the instrument according to Figure 3, and set the instrument under test to the dual-channel (A and B channels) measurement position.
b. The function generator outputs a 100Hz sine signal with a voltage amplitude of 1Vp-P- and sends it to the A and B channels of the instrument under test at the same time. Set the frequency of the instrument under test to 1kHz. Set the function key to the transient recording position, and set the display selection key to A&B. Press the total clear key, and then press the start key. It should be triggered. Start the acquisition circuit to record the input transient waveform, and the oscilloscope should be able to display the input sine signal. Record the inspection results in Table A5. 5.1.6.2 Inspection of preset trigger function
a. Connect the instrument according to Figure 4.
Function generator - Oscilloscope of the instrument under test
Printer
b. The function generator outputs a 100Hz sine signal, and the voltage amplitude is output according to the voltage requirements of the full-scale value of each input level of the instrument under test. c. Set the frequency range key of the instrument under test to 1kHz, the function selection key to the transient recording position, and the trigger selection to the 0 preset position. d. Check the 0 preset trigger: Press the total clear key of the instrument under test, and then press the start key. Connect the input signal, and the collected sine signal can be displayed on the oscilloscope. Set the print key to the print position, and then press the start key to print out the data. The first point of the data is the 0 preset trigger point. Record the inspection results in Table A5. 7
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e. Checking the preset 64-point trigger: Set the "trigger selection" to the 64-point position, repeat the previous item (d), and the maximum preset between the first point of the printed data and the trigger point should be 64 points. Record the inspection results in Table A5.
f. Checking the preset 128-point trigger: Set the "trigger selection" to the 128-point position, repeat item d, and the maximum preset between the first point of the printed data and the trigger point should be 128 points. Record the inspection results in Table A5.
5.1.6.3 Checking the trigger polarity and level
8. Connect the instrument according to Figure 4.
b, Checking the positive polarity and high level of the trigger: Set the trigger level selection key of the instrument under test to positive polarity and high level. Press the total clear key of the instrument under test, and then press the start key (the instrument under test has been connected to the input signal). At this time, the collected sine signal can be seen on the oscilloscope. Its trigger point should be a positive polarity high level. The first point of the data printed by the printer is the trigger point, and its amplitude is greater than 2/3 times the voltage value of the input level of the instrument under test. The same applies to each input level. The inspection results are recorded in Table A6. C. Trigger positive polarity, low level inspection: Repeat the previous item (b), and set the trigger selection key to the low level position. The amplitude of the first point of the printed data should not be less than 0.032 times the voltage value of the input level. The inspection results are recorded in Table A6. d. Trigger negative polarity, high level inspection: Repeat item b, set the trigger polarity key to the negative polarity position, and the amplitude of the first point of the printed data is negative. The absolute value of its amplitude should be greater than 2/3 times the input level of the instrument under test. The inspection results are recorded in Table A6. e. Trigger negative polarity, low level inspection, repeat item c, and set the trigger polarity key to the negative polarity position. The first point of the printed data is negative polarity, and the absolute value of its amplitude should not be less than 0.032 times the voltage value of the input level of the instrument under inspection. Record the inspection results in Table-A6.
5.2 Verification result processing and verification cycle
5.2.1 A verification certificate shall be issued for instruments that pass the verification; a verification result notice shall be issued for instruments that fail the verification, and the unqualified items shall be indicated. 5.2.2 The verification cycle is one year, and the instrument can be sent for inspection at any time if necessary. 8
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Appendix A
Verification record table format
(Supplement)
Table AI Single channel analysis frequency range and error verification rate range
0～5kHz
D~1kHa
0~500Hz
0～00H
赫南申
497,5z
Nominal value
KAONTKAca|| tt||SJ20248-93
Table A2 Dual-channel analysis frequency range and error verification frequency range
(a~-1kHz
0~500Hz
0~100Hz
0~500Hx
0~100Hz
Standard value
Nominal value
Decrease in position
Signal rate
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Table A3 Input signal voltage range check
Input voltage (A, B)
BmV, 20mVWww.bzxZ.net
20mV, 50mV
40mV.100mV
80mV, 200mV
200mV.500mV
Measurement result A
Table A4 Analysis speed Check
Amplitude
Detected frequency
Single channel
Nominal channel
<15+18
Measurement result B
FFT analysis time
Dual channel
Actual differential value
Nominal value
<30+18
Actual value
TYKAOIKAca-Trigger negative polarity, low level inspection, repeat item c, and set the trigger polarity key to negative polarity. The first point of the printed data is negative polarity, and the absolute value of its amplitude should not be less than 0.032 times the voltage value of the input level of the instrument under inspection. Record the inspection results in Table-A6.
5.2 Verification result processing and verification cycle
5.2.1 Verification certificates shall be issued for instruments that pass the verification; verification result notices shall be issued for instruments that fail the verification, and the unqualified items shall be noted. 5.2.2 The verification cycle is one year, and it can be sent for inspection at any time if necessary. 8
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Appendix A
Verification record table format
(Supplement)
Table AI Single channel analysis frequency range and error verification rate range
0～5kHz
D~1kHa
0~500Hz
0～00H
赫南申
497,5z
Nominal value
KAONTKAca|| tt||SJ20248-93
Table A2 Dual-channel analysis frequency range and error verification frequency range
(a~-1kHz
0~500Hz
0~100Hz
0~500Hx
0~100Hz
Standard value
Nominal value
Decrease in position
Signal rate
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Table A3 Input signal voltage range check
Input voltage (A, B)
BmV, 20mV
20mV, 50mV
40mV.100mV
80mV, 200mV
200mV.500mV
Measurement result A
Table A4 Analysis speed Check
Amplitude
Detected frequency
Single channel
Nominal channel
<15+18
Measurement result B
FFT analysis time
Dual channel
Actual differential value
Nominal value
<30+18
Actual value
TYKAOIKAca-Trigger negative polarity, low level inspection, repeat item c, and set the trigger polarity key to negative polarity. The first point of the printed data is negative polarity, and the absolute value of its amplitude should not be less than 0.032 times the voltage value of the input level of the instrument under inspection. Record the inspection results in Table-A6.
5.2 Verification result processing and verification cycle
5.2.1 Verification certificates shall be issued for instruments that pass the verification; verification result notices shall be issued for instruments that fail the verification, and the unqualified items shall be noted. 5.2.2 The verification cycle is one year, and it can be sent for inspection at any time if necessary. 8
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Appendix A
Verification record table format
(Supplement)
Table AI Single channel analysis frequency range and error verification rate range
0～5kHz
D~1kHa
0~500Hz
0～00H
赫南申
497,5z
Nominal value
KAONTKAca|| tt||SJ20248-93
Table A2 Dual-channel analysis frequency range and error verification frequency range
(a~-1kHz
0~500Hz
0~100Hz
0~500Hx
0~100Hz
Standard value
Nominal value
Decrease in position
Signal rate
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Table A3 Input signal voltage range check
Input voltage (A, B)
BmV, 20mV
20mV, 50mV
40mV.100mV
80mV, 200mV
200mV.500mV
Measurement result A
Table A4 Analysis speed Check
Amplitude
Detected frequency
Single channel
Nominal channel
<15+18
Measurement result B
FFT analysis time
Dual channel
Actual differential value
Nominal value
<30+18
Actual value
TYKAOIKAca-
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