HP E8402A, User And Service Manual, Page: 192 / 249

194 Calibrating and Verifying Performance
Chapter 4
Calibration
Procedure
1. Measure the +5Vdc supply at the Diagnostic Connector (Pin 1).
2. For Calibration, start by storing the reference voltage by sending the
CAL:VAL:VOLT
<supply>,<value> command. For example, if the +5 Vdc
supply measured 4.987, send the command:
CAL:VAL:VOLT P5,4.987
The P5 specifies the Positive 5 Vdc supply. Repeat the procedure for the +12
Vdc Supply (use P12 to specify), –12 Vdc Supply (N12), +24 Vdc Supply
(P24), –24 Vdc Supply (N24), –5.2 Vdc Supply (N5PT2), and –2.0 Vdc
Supply (N2).
After you have measured and stored the actual power supply voltages;
perform the actual calibration by sending the command:
CAL:VOLT?
3. Optionally, you can also calibrate the measurements for the +5 volt external
supply (used for the RS-232 port) and the +5 volt standby supply. Measure the
supply voltages where they enter the mainframe (rear panel for the +5 volt
external, Diagnostic Connector for +5 volt standby). Calibrate by sending the
commands:
CAL:VAL:VOLT P5EX,x.xxx
for 5 volt external supply
CAL:VAL:VOLT P5ST,x.xxx
for 5 volt standby supply
4. Remeasure the voltages at the Diagnostic Connector. Record these voltage
readings on the Performance Test Record Table.
This concludes the Power Supply Voltage Monitor calibration procedure.
Verification
Procedure
1. Measure the +5Vdc supply at the Diagnostic Connector (Pin 1).
2. For Performance Verification, record this reading on the Performance Test
Record Table.
Repeat steps 1 and 2 for the + 12 Vdc Supply, –12 Vdc Supply, +24 Vdc
Supply, –24 Vdc Supply, –5.2 Vdc Supply, and –2.0 Vdc Supply. Record
these voltage readings on the Performance Test Record Table.
This concludes the Power Supply Voltage Monitor verification procedure.