HP 181A manual DC Power Supply HP 53131A Counter

Chapter 6 Backdating

The HP 53131A Calibration Procedures

This completes the Offset Calibration procedure. Proceed to the next procedure to calibrate the gain.

CHANGE 1 (Firmware Revisions 3317, 3335, 3402, 3427) (Continued)

To Calibrate the Gain for Channels 1 and 2

1Press any one of the arrow keys until CAL: GAIN 1 ? is displayed.

2Press Enter key.

A scrolling message is displayed. Follow the instruction by performing the following steps.

3Connect a BNC tee connector to Channel 1 of the Counter.

4Connect the Counter, dc power supply, and multimeter as shown in Figure 2-1.

DC Power Supply	HP 53131A
	Counter	Digital Multimeter

+ - -

BNC Tee

Figure 2-1. Gain Calibration Setup

5Adjust the power supply until the multimeter displays + 5.000 V ± 0.001 V.

6Disconnect the digital multimeter from the Counter to prevent noise from being introduced into the measurement.

7Press Enter key.

The Counter momentarily displays CALIBRATING, and then it should display GAIN 1 PASS.

Assembly-Level Service Guide 6-11

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