1. High-Voltage Power Supply Adjustment

Equipment

Digital Multimeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3456A DVM Test Leads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 34118A

Procedure

Warning After disconnecting the ac power cord, allow capacitors in the high-voltage supply to discharge for at least 30 seconds before removing the protective cover from the A6 Power Supply.

1.Set the HP 8560A (LINE) switch off, disconnect the power cord, and remove the analyzer cover. Fold down the A2 Controller, A3 Interface, A4 Log Amplifier, and A5 IF assemblies. Remove the A6 Power Supply cover.

2.Position the HP 8560A as shown in Figure 2-l. Connect the positive DVM lead to A6TP405 and the negative DVM lead to A6TP401.

3.Set the HP 3456A controls as follows:

FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DCVOLTS RANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1OOOVOLTS

4.Reconnect the power cord to the HP 8560A and set the @ switch on.

5.Record the voltage marked on the A6Al HV Module.

Voltage marked on A6Al HV Module =

 

Vdc

6.Adjust A6R410 HV ADJ for a voltage equal to the voltage recorded in step 5.

7.Set the HP 8560A (LINE) switch off and disconnect the power cord. Wait at least 30 seconds for the high-voltage power supply capacitors to discharge.

8.Disconnect the DVM test leads from A6TP401 and A6TP405. Reinstall the power supply cover.

Adjustment Procedures 2- 13