Omega CL27 User Manual

http://www.omega.com e-mail: [email protected]®User’s GuideCL23A, 24, 25, 26, 27Digital Calibrator/Thermometer

WARNINGDo not touch a temperature probe sheath when measuringexcessively high or low temperatures, or toxic substances.WARNINGDo not attempt to measur

CAUTIONKeep inputs electrically isolated from outputs. Do not con-nect an external voltage source between the two connectors,and avoid any external el

2. Remove the old battery by lifting the battery extractor loop.3. Place the new battery in the battery compartment. Be sure to observeproper polarity

OPERATING INSTRUCTIONS1. DIAGNOSTICS AND ERROR MESSAGESUnit self-diagnostics provide fault condition readouts which are describedbelow:PROBLEM: LIKELY

If the unit is turning on for the first time after a new battery is installed, it willautomatically default to the METER mode (ie. temperature measure

METER: (unit functioning as a thermometer)K: (K-type thermocouple)°F: (Fahrenheit readings)OPR: (Instrument is operational)If no input thermocouple is

14Figure 4. 2-Wire Resistance MeasurementFigure 5. 3-Wire Resistance Measurement6. Select display resolution with 0.1°/1° key.NOTE: Set-up is retained

15Lead resistance errors are compensated for in 3-wire configurations.However full compensation requires equal resistance in each lead. Thisconfigurat

To Save Readings:1. While in the METER OPR mode, depress the STORE key. Note that theOPR annunciator is replaced by STO.2. Next depress one of the mem

eg. RECALL 3eg. RECALL 5eg. RECALL 2eg. etc.4. To return the meter to the operate mode, depress OPR after recalling thelast reading. All active locati

Servicing North America:USA: One Omega Drive, Box 4047ISO 9001 Certified Stamford, CT 06907-0047Tel: (203) 359-1660 FAX: (203) 359-7700e-mail: info@om

186. Select the resolution desired (0.1°/1° key).NOTE: With 1° resolution, one less key stroke will be required toenter calibrator output temperatures

Figure 10. 4-Wire Resistance Simulation19Figure 8. 2-Wire Resistance SimulationFigure 9. 3-Wire Resistance SimulationGRNREDBLKWHTNOTE: Colors indicate

8. STORAGE AND RECALL OF CALIBRATOR SETTINGSWhile operating as a calibrator, the unit can store and recall up to 10 outputsettings (each with independ

To Recall Outputs:1. While in the CALIB OPR mode, set-ups saved earlier in memory can berecalled to program the calibrator output. First depress the R

9. STEP FUNCTIONWhen operating in the CALIBRATOR mode, the STEP key will sequentiallyrecall data stored in memory (up to 10 steps). At each step, the

SERVICE INFORMATIONWARNINGAll service information is intended for qualified electronic mainte-nance personnel only.1. CALIBRATION PROCEDURESThis is a

24NOTE: For calibrators with the older, single-jumper configura-tion, refer to calibration procedure beginning on page 39.14. Install calibration cove

Calibration Adjustments:NOTE: Do not deviate from the calibration adjustment sequencethat follows. This will ensure that adjustments to be stored inEE

Sensor U.U.T. DMMStep Select Output Adjust Reading*1 K 32.0°F P1 0.000 mV ±1µV2 K 2500.0°F P41 54.856 mV ±1µV3 Repeat Steps 1 & 2 As Required4 J 3

27Figure 13. Calibration Setup, Calibrator Mode.Figure 11. Calibration Setup, Copper Mode.Figure 12. Calibration Setup, Meter Mode.

TABLE OF CONTENTSGeneral Information... 2Common Specifications...

B. RESISTANCE CALIBRATIONNOTE: Thermocouple and resistance calibrations are indepen-dent. However, potentiometer P1 is used in both thermocoupleand re

29Figure 14. Resistance Calibration Setup

Sensor Unit UnitStep Select Input Adjust Verify Reading*1 RTD-100 390.26Ω P1** 1562.0°F±0.5°F2 RTD-100 100.00Ω√32.0±0.1°F3 RTD-100 18.49Ω√–328.0±0.2°F

31CurrentSensor Unit Source DMMStep Select Output Input Adjust Verify Reading*1 RTD-100 1562.0°F 1mA P38 0.39026v2 RTD-100 32.0°F 1mA √ 0.10000±0.0000

CurrentSensor Unit Source DMMStep Select Output Input Adjust Verify Reading*1 RTD-100 1562.0°F 1mA P38 0.39026v2 RTD-100 32.0°F 1mA √ 0.10000±0.00006v

33Model Software RevisionCL23A 6.7CL24 7.7CL25 3.7CL26 5.6CL27 4.16(Software revision is marked on a label attached to integrated-circuit U1 onthe mot

4. Select type K thermocouple (“K” on display) by pressing the SENSORSELECT function button until type K is reached.5. Select the tenth degree display

19. Press the SENSOR SELECT function button. The sensor type willchange to type T. The “J” will disappear from the display and a “T” willappear on t

32. Press the SENSOR SELECT function button. The sensor type will change totype C. A “C” will appear momentarily in the center of the display. “600.0”

3. Select the calibrator mode (“CALIB” on display) by pressing theCALIB/METER function button.4. Select type K thermocouple (“K” on display) by pressi

GENERAL INFORMATIONThis manual provides operating instructions and maintenance information forfive temperature instruments. These instruments are high

4. MECHANICAL PARTS DIAGRAM38

39CALIBRATION PROCEDURESTest Equipment Required:1. Thermocouple simulator (OMEGA CL25, or equivalent).2. Microvolt null-meter (Keithley 155, or equiva

40NOTE: • With J1 removed, the digital-filters in the U.U.T. are dis-abled. This is to speed up U.U.T. response to calibra-tion adjustments. In this m

4123. Select Type-E thermocouple.24. Turn off U.U.T.25. Replace T calibration-cable with E calibration-cable.26. Turn on U.U.T. Allow 2-3 minutes for

4247. Set both the U.U.T. and TC-simulator to output 32.0°F (Type T). AdjustP1 for a null-meter reading of 0±3µV.48. Hit OPR key to store T-calib zero

WARRANTY/DISCLAIMEROMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for aperiod of 37 months from date of

M1554/499Where Do I Find Everything I Need for Process Measurement and Control? OMEGA…Of Course!TEMPERATURE䡺⻬Thermocouple, RTD & Thermistor Probes

3RTD; ±0.2°F (rdg ≥ – 50°F)RTD; ±0.5°F (rdg < – 50°F)RTD; ±0.2°F ±0.04% rdg (meter mode)THERMISTOR; ±0.5FOHMS; ±0.02% range* Exclusive of sensor er

4KEYPAD: 12 momentary switches with tactile feedback select;• On/Off• Change/Enter• Clear/–0• Sensor Select/1• °F/°C/2• Resolution/3• Operate/4• Store

5BATTERY LIFE, CONTINUOUS: 10 hrs. typical, alkaline; 3 hrs typical, Ni-Cd(rechargeable).BATTERY INDICATOR: Display indicates BAT when less than 10% o

ACCURACY: (18°C to 28°C ambient, 2 years): ±0.5 °F (rdg ≥ –50°F).±0.04% rdg (rdg > 1250°F)±1.0°F (rdg < –50°F)OHMS; ±0.04% rangeTEMPERATURE COEF

UNPACKING YOUR UNITRemove the Packing List and verify that you have received all equipment. Ifyou have any questions about the shipment, please call t