Doric Instruments 1000 Pro Series Digital Panel meters are suitable User Manual

Page 21

1000-ACV

AC Volts

Equipment Required:

1. Precision AC voltage source with a resolution to 0.1mV and

an accuracy of ±0.1%

2. Interconnecting copper wire from the AC source to the

indicator.

3. Trimmer adjusting tool.

STEP 1.

Disconnect power from the unit and using copper

connecting leads, connect the output of the AC Voltage source to
terminals 5 and 6 of the indicator according to the chart on page 5.

STEP 2.

Remove the front panel lens and reconnect power and

allow for a 5-minute warm-up.

STEP 3.

Input 0.0 mV from the AC voltage source and adjust the

ZERO pot for a display of 0.0±1 count. (Refer to the figure on page
15 for the location of the zero and span pots).

STEP 4.

Input 190.0 mV at the measured frequency from the AC

source and adjust the SPAN pot for a reading of 190.0±1 count.

STEP 5.

Repeat steps

3 and

4 until no further adjustment is

needed.