Pyromation Series 423 User 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

JUMPER

Note: If calibration is off due to the

CJC

, refer to

CJC

Calibration on page 17

Figure 26

CJC COMPENSATION