Loma IQ2 Service Manual page 45

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Monitor the R channels signal, the numbers will be continually moving. Observe the numbers
and their sign to determine if the average movement is symmetrical about 0 or if it is biased in
a negative or positive direction. If the direction is biased one way try to estimate the
symmetrical point of that bias. This number will be the starting value entered into the
adjustment menu position.
•
If the numbers observed after averaging are symmetrical then no adjustment is required.
Repeat for the X channel.
•
If the direction is biased one way then step down to the ADC R offset (sign) menu and select
the direction that is in the opposite to the signal bias.
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Step down to the ADC R channel (value) menu and enter the estimated number required to
return symmetry to about 0v. Return to the R signal menu and observe the effect of the offset
entry. This is a trial and error set up therefore several changes to the offset value entry may be
required.
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When satisfied that the average is symmetrical. Repeat the set up process using the X
channel ADC menu positions.
Module 7026
Configuration and Set up Information
5-23