Omega 25, 27, 26, 24 manual Data Logging and Recall

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WHT

BLK

GRN

RED

Figure 6. 4-Wire Resistance Measurement

Lead resistance errors are compensated for in 3-wire configurations. However full compensation requires equal resistance in each lead. This configuration is common with 100-ohm RTDs.

In 4-wire configurations, accuracy is unaffected by lead resistance, and resistance differences between leads.

NOTE: These instruments measure input voltages on all 4 termi- nals, and are able to distinguish between 2-4 and 3-wire hookups. Switching between these measurement modes is automatic.

2.Set instrument to METER mode.

3.Use the sensor-select key to set the instrument to the appropriate func- tion and range.

NOTE: Due to limited display area, 100Ω and 1000Ω RTD's are indicated on the display by a momentary readout of "RTD-100" (or "RTD-1000") when first selected.

Thermistors are identified by a momentary alpha-numeric readout of "Y-400" (signifying YSI Series-400 type thermistor).

Any of these readouts can be recalled by turning the unit off and back on.

5. DATA LOGGING AND RECALL

Operating as a meter, the unit can save and recall up to 10 readings (each with independent parameters: eg. °F/°C, TC-type and resolution) in random access memory.

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Contents CL23A, 24, 25, 26 Omega.comTM Table of Contents General Information Common SpecificationsTemperature Coefficient Page Model CL23A/CL23EC Unique SpecificationsModel CL24 Model CL25/CL25ECModel CL27/CL27EC FeaturesManual Addenda Unpacking Your Unit Safety InformationSafety Precautions Page Battery Installation Battery INSTALLATION/REPLACEMENTOperation with Rechargeable Battery Memory BackupProblem Likely Cause Diagnostics and Error MessagesOperating Instructions Initial Turn onKeypad OPR Meter Mode Operation Thermocouples Set-UpHold Meter Mode Operation RTD, Thermistor & Ohms Set-UpData Logging and Recall To Recall Readings To Save ReadingsCalibrator Mode Operation Thermocouples Set-Up To Erase Data Locations Meter ModeCHANGE/ENTER, 2, 1, 2, 0, CHANGE/ENTER Calibrator Mode Operation RTD, Thermistor & Ohms Set-UpWire Resistance Simulation To Store Outputs Storage and Recall of Calibrator SettingsTo Recall Outputs To Erase Set-Up Locations Calibrator ModeRamp Function CL25 and CL27 Step FunctionCalibration Procedures Service InformationThermocouple Calibration Test Equipment Required Ambient ConditionsPage Calibration Adjustments Input Adjust Reading Meter-Mode Zero & Gain Adjustments Sensor StepCalibrator-Mode Zero & Gain Adjustments Sensor Output Adjust ReadingCalibration Setup, Copper Mode Test Equipment Required Resistance CalibrationResistance Calibration Setup Calibration Adjustments Input Adjust Verify Reading Output Input Adjust Verify ReadingCalibration of Meter-Mode Resistance Functions RTD-Thermistor Sensor Unit StepCalibration Verification Equipment Required Model Software RevisionPage Page Alloy Mode Verification Procedure for Thermocouple Functions Page Mechanical Parts Diagram Calibration Procedures Page Page Page Page Page USAWARRANTY/DISCLAIMER Temperature