Cleveland Motion Controls DIN Rail Amplifier MWI-13261 Ultra Series Isolated REV BA - Manual (Page 27)

MAN-13261 R EV BA DIN R AIL A MPLIFIER , MWI-13261 U LTRA
3.10 G
AIN
A
ND
F
INE
Z
ERO
C
ALIBRATION
Use the following steps to make your final calibration adjustments:
1. Verify Zero on the analog Outputs for the “unloaded” condition and adjust the (Fine) Zero potentiometer to
correct for any minor offset voltage.
2. Apply the calibration force to the transducer(s) and adjust the Gain potentiometer to achieve the desired
span.
3. Verify linear operation of the transducer and amplifier by applying a force that falls somewhere between
the zero and full-scale endpoints. The intent is not to conduct any calibration per se, but to confirm the
hardware’s ability to accurately report a measured force.
We recommend that you focus only on achieving a particular voltage “span” between the load and unloaded forces
by alternating between the two force levels. Do not repeatedly adjust the Zero potentiometer between measurements
unless the offset voltage becomes excessive and interferes with achieving a valid output signal on the analog output.
You should only adjust the final Zero after the desired Gain setting has been achieved.
These final calibration steps represent the minimal adjustments that might be required at periodic calibration
intervals and
typically involves only the Zero and Gain potentiometers accessible through the small holes in the
front cover.
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