HP 3325A Calibration Manual page 21

(a) ENTRY FREQ.
(b) 100 kHz.
(c) ENTRY AMPTD.
(d) 10 V RMS.
(e) AMPTD CAL.
(5) Multimeter will indicate between 9 and 11 V ac.
(6) Press keys and enter values using DATA keys as listed in (a) through (f) below:
(a) FUNCTION square wave.
(b) ENTRY FREQ.
(c) 2 kHz.
(d) ENTRY AMPTD.
(e) 20 V RMS.
(f) AMPTD CAL.
(7) Multimeter will indicate between 19.6 and 20.4 V ac.
(8) Press FUNCTION triangle key and enter 11.5 V RMS using DATA keys.
(9) Press AMPTD CAL key. Multimeter will indicate between 11.27 and 11.73 V ac.
(10) Press FUNCTION positive ramp key and repeat (9) above.
b. Adjustments. No adjustments can be made.
20. Power Supply
Do not perform power supply check if all other parameters are
within tolerance.
a. Performance Check
(1) Connect multimeter INPUT HI to -15 V TP (fig. 5) and LO to ground side of C9
(fig. 5). Adjust R22 (fig. 5) for a multimeter indication of -14.97 to -15.03 V dc (R).
(2) Connect multimeter INPUT HI to +15 V TP (fig. 5). Readjust R22 (fig. 5) if
multimeter does not indicate between 14.9 and 15.1 V dc.
(3) Connect multimeter INPUT HI to +5 V TP (fig. 5). Readjust R22 (fig. 5) if
multimeter does not indicate between 5.01 and 5.05 V dc.
(4) Repeat (1) through (3) above for best in-tolerance condition on all test points.
NOTE
TB 9-6625-2049-35
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