PROBE BUDDY – USER MANUAL
Page 20 of 27
UPC_MAN013_R7
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Both the TC and mV values show the input signals in mV. If these values match the mV signal
inputs then only the cold junction calibration may be necessary.
Change to Output mode and enter typical values for the TC mV and mV outputs. Make sure
the TC and mV connections are plugged into mV meters to verify the output signals. The
following figure shows the output for TC set to 10mV and the output for MV set to 500mV
If the same values are shown on the attached mV meters, then it is not necessary to calibrate
the outputs.
The only measure that may need calibrating is the Cold Junction (input).
Calibration Displays and Keyboard Operation
When entering the Calibration Menu, the operator has to answer questions depending on
which I/O functions have to be calibrated. If the CAL INPUT prompt selection is YES, then the
parameters related to the thermocouple input and millivolt input can be changed. If this prompt
is skipped by pressing the Enter key, then a second prompt, CAL OUTPUT is displayed. If this
prompt is answered with a YES, then the preset outputs for TC and MV zero and span will be
generated. The operator can adjust values for each setting to match these preset values.
In the Calibration Menu, the display and panel keys function similar to other modes. The LCD
display shows the input and calibration point being calibrated. The upper line of the display
indicates that the instrument is in CAL mode. The lower display line indicates the actual input
or output level at the connection selected.
It is very important that the display indicates the proper type and zero or span parameter
before making an adjustment, otherwise the wrong value will be changed.
