ADLINK Technology ACL -6128, User Manual

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Calibration
5
Calibration
In data acquisition process, how to calibrate your measurement devices
to maintain its accuracy is very important. This chapter will guide you to
calibrate your ACL-6128 to an accurate condition.
5.1 What do you need
Before calibrating your ACL-6128 card, you should prepare some
equipment for the calibration:
1.
Calibration program : once the program is executed, it will walk you
through calibration procedure, step-by-step. This program is included
in the delivered package.
2.
one 4 1 /2 digital multimeter
5.2 VR Assignment
There are twelve variable resistors (VR) on the ACL-6128 board to allow
you making accurate adjustment on two D/A channels. VR1 to VR6
belong to CH1, and VR7 to VR12 belongs to CH2. The detailed
functionality of each VR is listed below:
CH1‘s VR
VR1 (-10V)Internal reference VR2 (-5V)Internal reference
VR3 Gain Adjustment VR4 Unipolar Offset
VR5 Bipolar Offset VR6 Current Sink Offset (4mA)