Omega 27, 25, 26, 24 manual CHANGE/ENTER, 2, 1, 2, 0, CHANGE/ENTER

6. Select the resolution desired (0.1°/1° key).

NOTE: With 1° resolution, one less key stroke will be required to enter calibrator output temperatures via the keypad.

7.The unit accepts numeric inputs by first changing the keypad to its num- ber-entry mode (NUM) by depressing the CHANGE/ENTER key once. The numeric display will flash, the OPR annunciator will turn off, and the NUM annunciator will turn on. Key in desired temperature value, most sig- nificant digit first. After the desired temperature value is keyed in, hit CHANGE//ENTER to return to OPR mode.

7.To enter a value of 212° with 0.1° resolution, the following keystrokes are used:

CHANGE/ENTER, 2, 1, 2, 0, CHANGE/ENTER

NOTES:

•Invalid numeric entries (eg. a temperature beyond the span of the selected TC type) will cause a corresponding error code to be displayed.

•To enter negative (ie. minus) temperatures, hit the –0 key first when in the NUM mode. The first hit on this key enters the neg- ative sign. Subsequent hits enter zeros.

•To correct a numeric entry while in the NUM mode, hit the CHANGE/ENTER key twice. This will return number entry to the beginning of a new number.

•To return the calibrator output to 0° while in the OPR mode, hit the CLEAR key.

•The unit can be used as a convenient °F to °C or °C to °F cal- culator.

For example, to convert 77°F to a Celsius reading, go to the CALIB OPR mode, enter the reading to be converted, and change scale.

eg. °F

eg. CHANGE/ENTER eg. 77

eg. CHANGE/ENTER

eg. °C (Display reads 25°C)

7.CALIBRATOR MODE OPERATION (RTD, Thermistor & Ohms) Set-Up:

1.Connect measurement equipment under test (eg. RTD thermometer, ohmmeter, etc.) to the instrument as shown in Figures 8, 9, or 10.

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