Pyromation Series 423 - Manual (Page 16)

15-1 THERMOCOUPLE CALIBRATION PROCEDURE
= UP = ENTER = DOWN
Page 15
Power panel meter for at least 30 minutes.
Enter menu program, go to the CAL mode. Press the down
button and hold for approximately 1.5 seconds until the meter
reads SHRT , then release the button. Failure to hold the button
for 1.5 seconds will terminate the calibration process.
Install jumpers between terminals 5, 6, and 7 using copper
wire. Press and release the enter button. Wait until 50mV
appears. Disconnect jumpers.
Now that 50mV appears, connect the leads from the 50mV
source to the meter using terminals 5 and 6, remembering that
terminal 5 is negative. Set the voltage supply for 50.040mV,
then press and release the enter button. This simulates a
thermocouple input. Wait until 100 ohm appears. Disconnect
supply.
Press the down button to skip 100 ohm input.
Now that CJC appears, place the thermometer across the
terminal strip and do not remove until the temperature stabi-
lizes. The reading from the thermometer is going to be the new
CJC temperature. Press and release the enter button. Use the
up or down button to set the value, then press the enter button
three times until V3.1 appears. Calibration is now complete.
{Step 1}
{Step 2}
{Step 3}
{Step 4}
{Step 5}
{Step 6}
Figure 25
7
JUMPER
6
5
Note: If calibration is off due to the CJC , refer to CJC Calibration on page 17
Figure 26
CJC COMPENSATION