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

Page 23

1000-DCA

DC Current

Equipment Required:

1. Precision DC current source with a resolution to 0.1mA and

an accuracy of ±0.1%

2. Interconnecting copper wire from the DC current source to the

indicator.

3. Trimmer adjusting tool.

STEP 1.

Disconnect

power from the unit and use copper

connecting leads, connect the output of the DC current source to
terminals 3 (+) and 6 (-) of the indicator according to the chart on
page 5.

STEP 2.

Remove the front panel lens, reconnect power and allow

for a 5-minute warm-up.

STEP 3.

Input 0.0 mA from the DC current 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 mA from the DC current 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.