Doric Instruments 5000D Digital Process Indicator and Miniature Datalogger - Manual (Page 25)

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the main board electronics out of the case from the front.
(Gently lift the display board above the catch located on the
bottom of the inside of the plastic housing while pushing on
the rear male connector on the rear of the main board
assembly.)
STEP 2. O bserving polarity, connect the DC voltage source
to the thermocouple inputs according to the wiring diagram
located on the plastic housing. With the power OFF, plug in
the wiring connector to the rear of the main board. Turn
power on and allow at least a 10-minute warm-up.
STEP 3.
Enter the program mode by pressing the PGM key
and then the ENT key. The INPT menu appears. Press the
Arrow key until the CAL menu appears. Press ENT. Input
0.00 mV and adjust the ZERO potentiometer RV201 (see
figure below) for a display of 0.0 ± 0.1.
ZERO
SPAN