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PROBE BUDDY – USER MANUAL Page 21 of 27
UPC_MAN013_R7
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Once the particular calibration mode is selected, the following keys perform the described
functions:
Key Function
UP ARROW Increases the displayed value.
DOWN ARROW Decreases the displayed value.
RIGHT ARROW Shifts the cursor to the upper digits to adjust the calibration factor. The
most significant digit of the display has the most effect on the displayed
value.
LEFT ARROW Shifts the cursor to the lower digits to adjust the calibration factor. The
least significant digit allows for the smallest adjustment.
ENTER Moves to the next calibration step and saves the calibration changes.
Wraps back to the CAL menu heading, if continually pressed.
SETUP Exits Cal mode, saves any changes, and returns to normal operation
mode.
Preparing for Input Calibration
The following items are required to calibrate thermocouple and millivolt inputs. The TC
extension wire and calibrator setting must match the PROBE BUDDY thermocouple setting.
• Calibrated millivolt source, 0 – 2000mV with a 0.1 mV resolution
• Calibrated TC millivolt source, -10mV to 70mV with a 0.1 uV resolution
• Copper wire with banana plug to connect millivolt source mV input
• Copper wire with uncompensated mini-thermocouple plug to connect the TC mV source
to the TC input
• Calibrated thermocouple simulator with internal cold junction compensation
• Thermocouple extension wire and similar mini thermocouple plug for the type of
thermocouple to be used
The TC zero and span calibration is done with the mV source. The cold junction calibration is
done with the TC source and set to the same thermocouple type as the PROBE BUDDY.
4.2.1 Calibration of Inputs
Calibration procedure:
1. In Calibration mode, press and hold the SETUP key to go to setup mode.
2. Press the ◄ or ► keys until the CALIB menu is shown.
3. Press Enter to go to CAL INPUT , press the ▲ or ▼ key to select Yes.
4. Press Enter to display the TC 0mV page.
5. Use a TC millivolt source with copper wire. Connect to the TC input connector.
6. Set the source output for 0.000mV.
7. Press Enter. The input will be averaged and the calibration values set.
8. The TC 100mV page is displayed.
9. Set the source output to 100.000mV.
10. Press Enter. The input will be averaged and the calibration values set.
11. Display changes to MV 0mV.
12. Connect mV source to mV connect and set to 0.00mV.