4. Verify that scope reads 10 times the panel METER reading (2 div at these settings).
5. Using JUNCTION ZERO control adjust METER to 0 mV.
6. Set the METER SELECT switch to the
Vc position. Verify that METER reads zero.
7. Set VOLTAGE COMMAND toggle to positive (+).
8. Adjust VOLTAGE HOLD control fully CW.
9. Verify the METER reads a minimum of
200 mV.
10. Set oscilloscope to 1 V/div. Verify that scope reads 10x the meter reading. (e.g. 2 V for
a meter reading of 200 mV).
11. Switch VOLTAGE HOLD toggle to minus (–). Redo steps 9 and 10.
12. Switch VOLTAGE HOLD toggle to positive (+).
13. Using VOLTAGE HOLD control, adjust until meter reads 150 mV.
14. Switch METER SELECT to Junction Zero.
15. Adjust JUNCTION ZERO until METER reads +100 mV.
16. Set METER SELECT to V
c
+h IN. Verify that METER reads holding potential of 150 mV.
17. Set METER SELECT to
V
c
. Verify that meter reads sum of holding potential and junction
offset (250 mV).
18. Set METER SELECT control to V
c
+h IN. Verify that the adjustment of JUNCTION ZERO control
does not affect the meter reading.
19. Set the VOLTAGE HOLD toggle to off.
20. Set the METER SELECTOR switch to Junction Zero and adjust the METER to zero.
21. Return amplifier to initial settings.
External DC Voltage command checkout
1. Apply a +1 VDC signal to COMMAND IN BNC on instrument rear panel.
2. Connect oscilloscope to V
c
x10 output BNC on instrument front panel.
3. Set the METER SELECT switch to
Vc.
4. Set COMMAND SELECT (COMMANDS block) to external command.
5. Set COMMAND SENSITIVITY to x0.1.
6. Turn COMMAND SENSITIVITY toggle to on.
7. Set oscilloscope to 0.5 V/div.
8. Verify that METER reads 100 ± 1 mV and that oscilloscope reads 1 V (2 div at these
settings).
9. Set COMMAND SENSITIVITY toggle to x0.01.
10. Set oscilloscope to 50 mV/div.
11. Verify that METER reads 10 mV and that oscilloscope reads 100 mV (2 div at these
settings).
12. Set COMMAND SENSITIVITY toggle to x0.001.
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