Resistance Signal Calibration; Voltage Signal Calibration - Process Technology DQ15D Instruction Manual

Step 9: Press and hold the "SET" key for one second. The
display will read "HoLd". Wait for the display to change
to "CAL2".
Step 10: Proceed with CAUTION to avoid SHOCK hazard.
Remove and relocate one end of the jumper cable to the
loose end of the second precision resistor for the second
resistance value (i.e. 2000 ohms or 200 ohms), as shown.
Step 11: Press and hold the "SET" key for one second. The
display will read "HoLd". Wait for the display to reset.
After it resets, the display should indicate the
approximate temperature value for the connected
precision resistors (i.e. 511º F or 266º C).
Step 12: Turn OFF power to the controller and remove the
precision resistors. Retain for future use. Reinstall the
RTD sensor and rear cover of controller. Return the
calibrated control to service.
Resistance Signal
The configuration and calibration procedures used for measuring pure
resistance are the same as are used to configure and calibrate a two wire
RTD sensor. However, in the setting configuration mode, the "U1" sen-
sor type parameter must be set to "12". See the "U1" instructions on
page 24. The unit will then measure pure resistance from 0-1000 ohms.
15

Voltage Signal Calibration

Optional PCN 5447 or 5416 board needed. The DQ15D control mea-
sures DC voltage and compares that measurement with a "standard" set
of values in the control memory. To restore, update or merely verify that
this "standard" set of values are correct, do the following:
Make sure that the DIP switch settings are OFF, ON, OFF (see page 29).
The voltage signal must be connected across terminals #1 and #2 of the
Adder Board (PCN 5416 or 5447). Terminal #2 is common (negative),
and terminal #1 is the signal connection (positive).
Note: Polarity must be observed.
WARNING!
Calibration procedures require the removal of the rear cover of the
control. It also requires that power is ON, exposing the technician to
potentially lethal voltages. Exercise EXTREME CARE and wear
tested electrician's gloves whenever power is on.
Calibration procedure for voltage signal:
Step 1: Turn OFF all power.
Step 2: Remove rear cover.
Step 3: Remove voltage input wiring.
Step 4: Install a voltage calibrator or power supply to terminal #1
and #2.
16