Chapter 6: AD12-8 Windows Driver Reference
Manual Number: 00650-014-4
Page 6-5
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ref_channel:
If the curve type is T for reference junction compensation, the A/D
channel that the reference junction compensation should be applied to is
passed here. For example if a zero is passed for this parameter, then all
AT16-P channels attached to AD12-8 channel 0 will be compensated,
provided they are set up as thermocouples.
Notes:
If no scaling is desired, than pass zero for the
hi
and
low
parameters.
If a curve is desired, then it is recommended that you do not use scaling. If values are passed for
hi
and
low
, then the driver will scale the results, after the temperature conversion.
The bipolar 5 volt range is recommended for thermocouples.
The following chart on the next page indicates the recommended gain for each thermocouple type.
You are not restricted to these values, the driver will compensate for any gain code you desire. If
you do not use the recommended gains however, a small round off error may result.
The auto-range gain code causes the driver to take an initial sample at a gain of two, then from the
result, determine the best gain to use to obtain the best resolution.
