HP 53132A Assembly And Service Manual page 211

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
1 Press any one of the arrow keys until CAL: GAIN 1 ? is displayed.
2 Press Enter key.
A scrolling message is displayed. Follow the instruction by performing the
following steps.
3 Connect a BNC tee connector to Channel 1 of the Counter.
4 Connect the Counter, dc power supply, and multimeter as shown
in Figure 2-1.
DC Power Supply
+
Figure 2-1. Gain Calibration Setup
5 Adjust the power supply until the multimeter displays
+ 5.000 V ± 0.001 V.
6 Disconnect the digital multimeter from the Counter to prevent
noise from being introduced into the measurement.
7 Press Enter key.
The Counter momentarily displays CALIBRATING , and then it should
display GAIN 1 PASS .
Assembly-Level Service Guide
HP 53131A
Counter
- -
BNC Tee
Digital Multimeter
6-11