Perma Pure Modular Board - Manual (Page 10)

A volt meter and a thermocouple calibrator are required for the operations.
The cold junction temperature should be set first prior to the thermocouple
calibration.
Cold Junction Temperature
Turn both #5 and #6 switches to the ‘ON’ position of the DIP Switch labeled
SW1. The display will toggle between a label of ‘ cJt’ and the value of the board
temperature. The label ‘ cJt’ will be displayed for 1 second followed by the value
of the board temperature for 3 seconds.
Measure the temperature of the board near the thermocouple connectors. Adjust
the displayed temperature using the ‘UP’ or ‘DOWN’ buttons. When the
temperature displayed matches the measured value; move switches #5 and #6 to
the ‘OFF’ position to record the value.
Analog Calibration (Voltage output calibration)
Move switch #6 to the ‘ON’ position of the DIP Switch labeled SW1 to begin
calibration. The front digital display will go blank. The back indicator LED lights
will be lit and display the calibration stage.
Voltage Output Calibration
Voltage 1
Connect negative probe of the volt meter to ‘Analog Output’ connector CN11 to
pin 1 ‘COMM’.
Connect positive probe of the volt meter to ‘Analog Output’ connector CN11 to
pin 3 ‘AN1(+)’.
Set the voltmeter range to +/- 2.000 VDC, 1 mV resolution.
Voltage 1 Zero is the first step; The top light is on solid and the next three lights
will blink.
LED indicators in order top to bottom
CAL : CHANNEL : IN / OUT : HIGH / LOW
SOLID
BLINK
BLINK
BLINK
The volt meter will display the voltage associated with 0.0 °C. Adjust the output
voltage using the ‘UP’ and ‘DOWN’ buttons. Press the ‘NEXT’ button when the
voltage output measures 0.000 +/- 0.005 VDC.