3 Front-Panel Overview
56 Keysight 34970A/34972A Service Guide
To Perform a Zero Adjustment
The instrument features closed case electronic calibration. No internal mechanical
adjustments are required. The instrument calculates correction factors based
upon an input reference value and stores the correction factors in non-volatile
memory. This procedure demonstrates making the zero adjustment from the front
panel. The gain adjustments are similar.
DO NOT perform this procedure before reading Chapter 4. Chapter 4 describes
this procedure, the required input connections, input signals, and test
considerations required for a valid adjustment.
1 Configure the channel.
You must configure a channel before applying performing the adjustment
procedure. Configure the channel to DC VOLTS and 6½ digits.
2 Apply the input signal.
In this example, the input signal is a copper short (see page 69).
3 Setup the calibration.
The display will show PERFORM CAL.
4 Set the adjustment value.
The display will show the a number. Edit the number to the actual input value.
For the Zero Adjustment, the input value is 0.000000.
5 Begin the ad justment.
The display will show the progress of the adjustment. When all the
adjustments are completed, the display will show done.
+000.000,000 mVDC
DONE
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