Super Systems 9130 Series - Manual (Page 82)

Series 9130 Operations Manual Rev - 81
Cold Junction Calibration
Set up the calibrator for the specific
thermocouple type of the thermocouples in the
analog board, i.e. type K, type J, etc. Then,
source a specific temper
is recommended that the actual temperature
used be similar to an appropriate process
temperature. For example, if your equipment
The “Cold Junction” tab will allow the user to
perform a cold junction trim on the selected
board.
The user can select the input to perform the
trim on from the “Input:” box. The user can
enter the cold junction offset in the “Offset:” box. The current cold junction value will be displayed next to
the “CJ:” line. Also, the current values from the selected inputs will be displayed on the right of the tab. To
display an input’s value on the “Cold Junction” tab, click on the “Zero/Span” tab and check that input’s
checkbox, then return to the “Cold Junction” tab.
To determine if a cold junction adjust is necessary, source a specific temperature to the input(s). If the
temperature reading displayed does not match closely enough to the source value, then the “Offset” will
need to be changed. Enter the amount of change in the “Offset” box. If the value of 1750 °F is being
sourced, but the input(s) is showing 1751.3 °F, then the “Offset” would be set to “-1.3” to bring the
temperature display back down to 1750 °F. If the input was showing 1748.3 °F, then the “Offset” would be
set to “1.07”.
Note – The current cold junction value is for display purposes only and should not be
considered when determining the cold junction offset .
Click on the Calibrate button to begin the calibration.
Click on the Done button to close down the screen.
9130 User Calibration
Click on the “click” value next to the “9130 User Calibration” field to start the user calibration. The
Calibration screen will be displayed. For complete calibration of Analog Inputs start with step #2 Zero and
Span Calibration . The Cold Junction should be performed AFTER the user has calibrated all of the inputs
and outputs .