24
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Calibration
Offset Calibration:
1.
Set internal reference as -5V
2.
Set the digital data as (1000 0000 0000)
B
, trim VR5 (for CH1) or VR10
( for CH2)until the voltmeter reading is 0V.
5.5 Unipolar Output Calibration
If you choose Unipolar mode for analog output, you have to go through
the Unipolar Output Calibration. There are two steps - Gain Calibration
and Offset Calibration, the detailed calibration procedures are list as
follows.
Gain Calibration:
1.
Set jumper JP1 & JP5( for CH1) or JP2 & JP9 ( for CH2) as unipolar,
and choose internal reference as -5V
2.
Set the digital data as (1111 1111 1111)
B
, trim VR3 ( for CH1) or VR9
( for CH2)until the voltmeter reading flickers between 4.99V and 5.00V.
Offset Calibration:
1.
Set jumper JP1 & JP5( for CH1) or JP2 & JP9 ( for CH2) as
unipolar
,
and choose internal reference as
-5V
2.
Set the digital data as (0000 0000 0000)
B
, trim VR4 ( for CH1) or VR11
( for CH2)until the voltmeter reading is 0 V.
5.6 Current Sink Calibration
If you choose the current sink output, please set the configuration as :
Internal Reference, and its reference voltage set as -5V.
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
, and unipolar output range.
2.
Trim VR5 ( for CH1) or VR6 ( for CH2) to keep a constant current of
4mA.
Summary of Contents for ACL -6128
Page 1: ...N u D A Q A C L 6 1 2 8 2 Channel Isolated 12 bit Analog Output Card U s e r s G u i d e...
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