Omega 24, 27, 25, 26 manual Opr, Meter Mode Operation Thermocouples Set-Up

METER: (unit functioning as a thermometer)

K:(K-type thermocouple)

°F:	(Fahrenheit readings)
OPR:	(Instrument is operational)

If no input thermocouple is connected to the unit at this time, the numeric segments will indicate "OPEN".

Plugging a thermocouple into the meter jack (connector T2, on the top right side) will give actual thermocouple temperature readings.

NOTE: To obtain full accuracy, allow 1-2 minutes after connect- ing a thermocouple plug, for thermal setting.

If the instrument is to be used as a thermometer or ohmmeter, refer to the Meter Mode Operation section for detailed instructions. For use as a tem- perature-calibrator or ohms simulator, refer to Calibrator Mode Operation.

3.METER MODE OPERATION (Thermocouples) Set-Up:

1.Turn on instrument by depressing the ON/OFF key.

2.Check that the BAT annunciator turns off following the power-up LCD test. If it does not turn off, less than 10% of battery remains. Refer to Battery Installation/Replacement instructions.

3.If the meter is already in the METER mode, the METER annunciator will be on. Otherwise the calibrator mode is enabled and the CALIB annunci- ator is on. Depress the METER key to return to meter mode.

4.Connect an input thermocouple (TC) to connector T2. Select the appro- priate TC Type with the select-key. A display annunciator will indicate the selected TC-type.

NOTE: Space and legibility constraints on the display preclude the use of dedicated annunciators for the less common tungsten- rhenium thermocouple types (G, C & D). Instead, these types are annunciated momentarily on the alpha-numeric display when first selected. Both T and R annunciators remain on to indicate a Tungsten-Rhenium selection. To recall the actual G, C, D selec- tion, turn the unit off, then on again for another momentary read- out.

5.Select temperature scale with °F/°C key. The corresponding annunciator is enabled.

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