Calibration Procedures 2
Keysight DAQ970A/DAQ973A Service Guide 59
7 A “Calibration Step Succeeded” message indicates success; if the display
shows “Calibration Step Failed”, check the input value, range, function, and
entered calibration value, and repeat the calibration step.
8 Repeat step 5 to step 7 for each frequency in the following table.
9 Repeat step 5 to step 8 for each current in the following table.
10 Store the new gain and flatness calibration constants (see “Storing calibration
constants” on page 46).
Frequency accuracy calibration
1 Ensure that you have read the “Test Considerations” on page 47 and the “Gain
and flatness adjustment considerations” on page 55.
2 Ensure that you follow the sequence listed in the “Calibration Adjustment
Sequence” on page 51.
3 This procedure will measure and adjust the input signal from the calibrator
source connected to Channel 302 (Frequency). See the connections in “Input
test signal” on page 38.
4 Select Channel 302 and configure the function in the order shown in the table
below and enable Channel Monitor on the selected channel before each test
(see “Channel monitor” on page 50).
5 Apply the input signal per the input column in Table 2-4 and allow for
appropriate source settling.
Table 2-3 AC current gain and flatness calibration
Input Channel 321
Current Frequency Function Range AC filter
1 A
5 kHz | 7.5 kHz |
9.7 kHz | 10 kHz |
220 Hz | 1 kHz
AC current
1 A
>3 Hz
100 mA 100 mA
10 mA 10 mA
1 mA 1 mA
100 mA 100 mA
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