3 scale calibration – Monarch Instrument DC 2000 User Manual
Page 120
Chapter 6 Calibration
Page 6-2
6.3 Scale Calibration
The Recorder menu supports full calibration for the voltage and current input ranges of the instrument. Each range
requires a unique calibration constant, which is automatically calculated during the calibration of each range.
6.3.1 Calibration Scales
Follow the procedures below to calibrate scales.
6.3.1.2 Connecting Voltage Source
Connect the precision voltage source to any available direct input at the rear upper (lower) analog Input
terminals. Select any channel and connect the voltage source to the + and - inputs ensuring the correct
polarity. Turn on the Voltage Source and allow 10 minutes for it to warm up and stabilize. See Figure 2-6.
6.3.1.3 Programming from COMMAND Prompt
In the Hidden menu use the UP (
↑
) or DOWN (
↓
) Arrow Keys to select “ADC Control” and press ENTER.
Use the UP (
↑
) or DOWN (
↓
) Arrow Keys to select “Cal ADC” and press ENTER. Use the UP (
↑
) or DOWN
(
↓
) Arrow Keys to select “Cal Scale” and press ENTER.
6.3.1.4 Calibrating the Voltage Ranges
To calibrate any of the voltage ranges, a known good input must be supplied to the Recorder as shown in
the table below:
Range to Calibrate
Voltage Source
150 mV
150 mV
1.25 V
1.25 V
2.5 V
2.5 V
12.5 V
12.5 V
25 V
25 V
The following steps are used to guide the user through calibration of all the voltage ranges. Set the
precision Voltage Source for the appropriate range. Use the UP (
↑
) or DOWN (
↓
) Arrow Keys to select the
range in need of calibration and press ENTER. Use the UP (
↑
) or DOWN (
↓
) Arrow Keys to select to select
the Channel Input Number 1, 2, 3, 4, 5 or 6 to which the voltage source is connected and press ENTER.
With voltage source connected and turned on, press ENTER. A window will appear showing the reading of
the voltage source connected.
NOTE: If the calibration is not correct, the value shown in the window will not be correct.
You will then be prompted with an “Are you sure?” message. Select YES to continue the calibration or NO
to abort. If YES is selected, the Recorder calibrates the selected range. Repeat for the remaining voltage
ranges.