Manual - 8500A Series Peak Power Meter - Giga-tronics

Testing and Calibration
5.3.3 A2 Regulator Board
A. +5 V Adjust
1. Connect the DVM LO test lead to A2TP11.
2. Connect the DVM HI test lead to A2TP9.
3. Adjust A2R42 (+5V ADJ) for a DVM reading of +5.000V ±100 mV.
4. Vary the Variac voltage from 100 Vac to 130 Vac. The DVM reading must not change more
than ±5 mV.
B. -5.2 V Check.
1. Connect the DVM HI test lead to A2TP10. The DVM must read -5.200 V ±200 mV.
2. Vary the Variac voltage from 100 to 130 Vac. The DVM reading must not change by more
than ±5.2 mV.
3. Set the Variac to 115 Vac.
C. -15 V Adjust.
1. Connect the DVM LO test lead to A2TP6.
2. Connect the DVM HI test lead to A2TP5.
3. Adjust A2R22 (-15 V ADJ) for a DVM reading of -15.000V ±15 mV.
4. Vary the Variac voltage from 100 to 130 Vac. The DVM reading must not change by more
than ±15 mV.
D. +15 V Check.
1. Connect the DVM HI test lead to A2TP3. The DVM must read +15.000 V ±45 mV.
2. Vary the Variac voltage from 100 to 130 Vac. The DVM reading must not change by more than
±15 mV.
Turn OFF the power.
Disconnect the Variac and connect the power meter to the ac power source.
Manual No. 20790, Rev C, November 1998 5-11
Superceded by Revision D, March 2009