Omega CL24, CL25, CL27, CL23A, CL26 manual CHANGE/ENTER, 2, 1, 2, 0, CHANGE/ENTER

Page 20

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.

18

Page 19 Page 21
Image 20
Page 19 Page 21
Contents
User’sGuide Omega.comTM Table of Contents Common Specifications General InformationTemperature Coefficient Page Unique Specifications Model CL23A/CL23ECModel CL24 Model CL25/CL25ECModel CL27/CL27EC FeaturesManual Addenda Unpacking Your Unit Safety InformationSafety Precautions Page Battery INSTALLATION/REPLACEMENT Battery InstallationMemory Backup Operation with Rechargeable BatteryDiagnostics and Error Messages Problem Likely CauseOperating Instructions Initial Turn onKeypad Meter Mode Operation Thermocouples Set-Up OPRMeter Mode Operation RTD, Thermistor & Ohms Set-Up HoldData Logging and Recall To Save Readings To Recall ReadingsTo Erase Data Locations Meter Mode Calibrator Mode Operation Thermocouples Set-UpCalibrator Mode Operation RTD, Thermistor & Ohms Set-Up CHANGE/ENTER, 2, 1, 2, 0, CHANGE/ENTERWire Resistance Simulation Storage and Recall of Calibrator Settings To Store OutputsTo Erase Set-Up Locations Calibrator Mode To Recall OutputsStep Function Ramp Function CL25 and CL27Service Information Calibration ProceduresThermocouple Calibration Test Equipment Required Ambient ConditionsPage Calibration Adjustments Meter-Mode Zero & Gain Adjustments Sensor Step Input Adjust ReadingCalibrator-Mode Zero & Gain Adjustments Sensor Output Adjust ReadingCalibration Setup, Copper Mode Resistance Calibration Test Equipment RequiredResistance Calibration Setup RTD-100 390.26Ω Output Input Adjust Verify Reading Input Adjust Verify ReadingCalibration of Meter-Mode Resistance Functions RTD-Thermistor Sensor Unit StepCalibration Verification Model Software Revision Equipment RequiredPage Page Alloy Mode Verification Procedure for Thermocouple Functions Page Mechanical Parts Diagram Calibration Procedures Page Page Page USAWARRANTY/DISCLAIMER Temperature