Keysight Technologies DAQ970A Service Manual page 73

Frequency accuracy verification
1 Ensure that you have read the
2 This procedure will measure the input signal from the function/arbitrary
3 Configure each function and range to the respective channel in the order
4 Apply the input values and allow for appropriate source settling and compare
5 Repeat step 4 for each accuracy verification item.
Input
[b]
Vrms Frequency
0.1 Vrms 10 Hz
0.01 Vrms 300 kHz
[a] Q: Quick performance verification test points.
[b] Keysight 33500B Series function/arbitrary waveform generator: Select Function to Sinusoid, Output Load to High Impedance (INF).
[c] For Channel 302, select frequency function, voltage range, and 1 second gate time.
AC voltage and AC current gain verification
1 Ensure that you have read the
2 This procedure will measure the input signal from the calibrator source
3 Configure each function and range to the respective channel in the order
4 Apply the input values and allow for appropriate source settling and compare
Keysight DAQ970A/DAQ973A Service Guide
waveform generator connected to Channel 302 (frequency). See the
connections in "Input test signal"
shown in following table. Provide the indicated input voltage and frequency.
Enable Channel Monitor on the selected channel before each test (see
"Channel monitor" on page 50).
the measurement results to the appropriate test limits.
Channel 302
Quick
Voltage
check
[c]
range
1 Vrms
0.1 Vrms
connected to Channel 302 (AC voltage) and Channel 321 (AC current). See the
connections in "Input test signal"
shown in following table. Enable Channel Monitor on the selected channel
before each test (see
the measurement results to the appropriate test limits.
"Test Considerations"
on page 38.
[a]
24 hours
±3 mHz
Q ±60 Hz
"Test Considerations"
on page 38.
"Channel monitor" on page 50).
Performance Verification
on page 47.
Error from nominal
90 days 1 year
±3 mHz ±3 mHz
±150 Hz ±210 Hz
on page 47.
3
2 years
±3 mHz
±270 Hz
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