Maintence and Troubleshooting
Unipro 3.5
Rev. 11.00
December 30, 1995
Preparing For Calibration
Before placing the UNIPRO into calibration
mode, check to be sure that for each input:
The proper thermocouple
type has been selected, and
Cold Junction compensation has
been selected, if required. Cold Junction
compensation can be selected by using the
[Setup] key. The option is below the
corresponding input type selection.
The UNIPRO is placed into calibration mode by connecting a
jumper from TBD-17 to TBD-18. To make sure of the integrity
of the calibration factors, power should be applied to the
UNIPRO before this jumper is installed and not removed until
after this jumper has been removed. The UNIPRO should be
operating for at least 30 minutes before calibration to make
sure that input circuits have stabilized.
For each input of the UNIPRO, follow the calibration
procedure by the type of input board installed for that input.
Once an input has been calibrated, be sure to press the [Enter]
key to make sure that the latest calibration factors are stored.
Calibration Of The Thermocouple Board This calibration procedure assumes that a
thermocouple has been selected and internal cold junction
compensation is being used. If this is not true, follow the
procedure for the auxiliary board using a 0 to 40 millivolt
signal. The calibration procedure is as follows:
Connect the input to be calibrated
to a junction compensated calibrator (IE:
Biddle Instrument Co. Versa-Cal
Calibrator) using the proper extension
wire for the thermocouple type selected.