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SECTION 19. COLD JUNCTION OFFSET CALIBRATION (C.J.OF)
The cold junction offset equals the actual temperature minus the reading temperature. You may
compensate for any error due to cold junction on the TC input. You may perform this
compensation in any temperature from 0°C to 40°C (or 32°F to 104°F), however we recommend
you perform this compensation at 0°C (32°F) for best result. To do this, immerse the
thermocouple hot junctions into a mixture of ice and water. Check the Reading Configuration bit
R.1 of the
“RD.CF”
menu setting for the proper temperature units.
TO PERFORM THIS COMPENSATION, FOLLOW THESE STEPS:
1.
Connect the thermocouple wire to the (+) and (-) input.
2.
Press the
MENU
button until meter displays
“CJ.OF”
.
3.
Press the
/
DEV
button. the meter displays the previous offset value with flashing 4th
digit.
4.
Press the
/
DEV
button again. The reading temperature will be displayed (with no digit
flashing).
5A. If the value is okay, then press the
MENU
button. The display will show
“STRD”
and 0
value will be entered at the offset.
B. If the value is not okay, then enter the actual temperature using the
/
DEV
and
/MAX
buttons. Once you enter the accurate temperature, press the
MENU
button. The meter
displays
“STRD”
and stores the offset value.
1.
Temperature unit is either celsius or fahrenheit and will always be displayed at 0.1
degree resolution. The meter flashes corresponding LED.
2.
MAX/MIN offset value will be ±25.0 °C or 45.0 °F. If offset the limit, the meter will
flash
“ER 3”
and previous offset will not be changed.
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Summary of Contents for CN1001-TC
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