Manual

30
•
Calibration
5.5 Bipolar Output Calibration
If Bipolar mode for analog output is used, use Bipolar Output Calibration to
correctly calibrate. There are two steps involved: Gain Calibration and Offset
Calibration.
Gain Calibration:
1.
Set jumpers
JP1
and
JP5
(for
CH1
) or
JP2
and
JP9
(for
CH2
) as
bipolar, and choose an internal reference as
-5V
.
2.
Set the digital data as (1000 0000 0000)
B
, trim VR4 (for CH1) or VR10
(for CH2) until the voltmeter reading is
0V
.
Offset Calibration:
1.
Set the internal reference to -
5V
.
2.
Set the digital data as (0000 0000 0000)
B
, trim VR6 (for CH1) or VR12
(for CH2) until the voltmeter reading is
-5V
.
5.6 Current Sink Calibration
If using current sink output, please do the following:
Use
-5V
for internal reference and its reference voltage.
Follow the below procedures to calibrate the current sink output.
1.
Set the digital data as (0000 0000 0000)
B
, and internal reference as
-
5V
, using unipolar output range.
2.
Trim VR5 (for CH1) or VR11 (for CH2) until there is a constant current
of
4mA
.