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User’s Guide
®
http://www.omega.com
e-mail: info@omega.com
CL23A, 24, 25, 26, 27
Digital Calibrator/Thermometer
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TM omega.com ® OMEGA SM OMEGAnet On-Line Service Internet e-mail http://www.omega.com info@omega.com Servicing North America: USA: One Omega Drive, Box 4047 ISO 9001 Certified Stamford, CT 06907-0047 Tel: (203) 359-1660 FAX: (203) 359-7700 e-mail: info@omega.com Canada: 976 Bergar Laval (Quebec) H7L 5A1 Tel: (514) 856-6928 FAX: (514) 856-6886 e-mail: canada@omega.com For immediate technical or application assistance: SM USA and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA SM Customer S
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TABLE OF CONTENTS General Information......................................................................... 2 Common Specifications................................................................... 2 Unique Specifications...................................................................... 5 Features........................................................................................... 6 Manual Addenda ............................................................................. 6 Unpac
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GENERAL INFORMATION This manual provides operating instructions and maintenance information for five temperature instruments. These instruments are high performance cali- brator-thermometers capable of simulating and measuring a wide-variety of sensors. In addition, features such as data storage and ramping further enhance their versatility. It is recommended that you read this manual thoroughly, especially the sec- tions on safety, prior to operating these instruments. COMMON SPECIFICATIONS THE
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RTD; ±0.2°F (rdg ≥ – 50°F) RTD; ±0.5°F (rdg < – 50°F) RTD; ±0.2°F ±0.04% rdg (meter mode) THERMISTOR; ±0.5F OHMS; ±0.02% range * Exclusive of sensor errors, and lead resistance induced errors. RESOLUTION: TEMPERATURE; 0.1°/1° F/C RESOLUTION: OHMS; 0.01Ω /0.1Ω /1Ω REPEATABILITY (1 week at constant ambient temperature): K, J, T, E, N; ±0.2°F typ. B, R, S, G, C, D; ±1.0°F typ. RTD, THERMISTOR; ±0.1°F typ. OHMS; ±0.01% rng typ. TEMPERATURE COEFFICIENT: From 18°C to 28°C, included in accuracy specifi
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KEYPAD: 12 momentary switches with tactile feedback select; • On/Off • Change/Enter • Clear/–0 • Sensor Select/1 • °F/°C/2 • Resolution/3 • Operate/4 • Store/5 • Recall/6 • Calibrator/Meter/Up Ramp/7 • Calibrator Step/Down Ramp/8 • Calibrator Ramp/Meter Hold/9 DISPLAY: 5 digit LCD, 0.4" height, and decimal point. Annunciators; • Loaded Memory Locations (10 for data storage, 4 for ramp parameters) • Low Battery (BAT) • Number Change Mode (NUM) • Calibrator Mode (CALIB) • Meter Mode (METER) • Oper
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BATTERY LIFE, CONTINUOUS: 10 hrs. typical, alkaline; 3 hrs typical, Ni-Cd (rechargeable). BATTERY INDICATOR: Display indicates BAT when less than 10% of life remains. DIMENSIONS, WEIGHT: 7.0" × 2.9 × 1.1". Net weight 12 oz. UNIQUE SPECIFICATIONS NOTE: The specifications below are specific to the model(s) as identified by model number. The difference specifications are in addition to the OVERALL SERIES SPEC- IFICATIONS found on pages 2-5. • MODEL CL23A/CL23EC: SENSOR SELECTION: K, J, T/K, J, T, L
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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% range TEMPERATURE COEFFICIENT: 18°C to 28°C; included in accuracy specifications. From 0°C to 18°C, and 28°C to 50°C. K, J, T, E; ±(0.006% rdg + 0.03°C)/°C RTD, THERMISTOR, OHMS; ±(0.006% rdg +0.012% rng)/°C RAMP FUNCTION: Not Included. • MODEL CL27/CL27EC: SENSOR SELECTION: K, J, T, E, N, B, R, S, G, C, D/K, J, T, E, N, B, R, S, L, C, D Thermocouples 100Ω /1000Ω Platinu
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UNPACKING YOUR UNIT Remove the Packing List and verify that you have received all equipment. If you have any questions about the shipment, please call the OMEGA Customer Service Department at 1-800-622-2378 or (203) 359-1660. When you receive the shipment, inspect the container and equipment for any signs of damage. Note any evidence of rough handling in transit. Immediately report any damage to the shipping agent. NOTE: The carrier will not honor any claims unless all shipping material is saved
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WARNING Do not touch a temperature probe sheath when measuring excessively high or low temperatures, or toxic substances. WARNING Do not attempt to measure temperatures beyond the range of the probe being used. Probe damage or personal injury could result from exceeding a probe's maximum temperature rating. WARNING The American National Safety Institute (ANSI) states that a shock hazard exists when probes or sensors are exposed to voltage levels greater than 42VDC or 42V peak AC. Do not use this
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CAUTION Keep inputs electrically isolated from outputs. Do not con- nect an external voltage source between the two connectors, and avoid any external electrical pathways between input and output (T2 & T1). Failure to do so will disturb meter readings and calibrator output levels. Damage to the instrument is also possible. Where the meter and calibrator connectors are simultane- ously wired into a system lacking the above isolation, it is necessary to use an "ungrounded" (i.e. electrically isola
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2. Remove the old battery by lifting the battery extractor loop. 3. Place the new battery in the battery compartment. Be sure to observe proper polarity. 4. Re-install the battery cover before resuming use of the instrument. NOTES: • Less than 10% of battery life remains when the BAT annuncia- tor turns on. • When the battery is excessively discharged, the display is blanked. • If the instrument is going to be stored for a long period of time or in a high temperature environment, remove the bat
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OPERATING INSTRUCTIONS 1. DIAGNOSTICS AND ERROR MESSAGES Unit self-diagnostics provide fault condition readouts which are described below: PROBLEM: LIKELY CAUSE: Blank display, unit does not (1) Improper battery installation. power-up. (1) Check battery polarity. (2) Dead battery. BAT Annunciator. (1) Low battery voltage, install a new battery. If problem persists, con- sult factory. Display reads OPEN. (1) No thermocouple, RTD or thermis- tor is plugged into the meter input. Display reads E1 mo
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Figure 2. Keypad Figure 3. Display Test If the unit is turning on for the first time after a new battery is installed, it will automatically default to the METER mode (ie. temperature measurement operation). It also defaults to K-type thermocouples, and °F readings with 0.1° resolution. The corresponding LCD annunciators are enabled: 12
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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 t
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6. Select display resolution with 0.1°/1° key. NOTE: Set-up is retained during power-off. Hold: Meter readings can be put on hold at any time by depressing the HOLD key. At this time, the HOLD annunciator turns on, the reading is frozen, and all keys (except ON/OFF and HOLD) are locked out. Depress the HOLD key again to return to real-time readings, and re-enable the keypad. 4. METER MODE OPERATION (RTD, Thermistor & Ohms) Set-Up: 1. Connect a sensor or unknown resistance to the instrument as sh
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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 the
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To Save Readings: 1. While in the METER OPR mode, depress the STORE key. Note that the OPR annunciator is replaced by STO. 2. Next depress one of the memory location numbers (keys 0, 1, . . ., 9). The corresponding memory annunciator turns on and the meter returns momentarily to the OPR mode, displaying thermocouple temperature. eg. STORE 7 NOTES: • The enabled location annunciator indicates that the meter read- ing at the instant that the location number key was hit, was stored in memory. • Whe
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eg. RECALL 3 eg. RECALL 5 eg. RECALL 2 eg. etc. 4. To return the meter to the operate mode, depress OPR after recalling the last reading. All active location annunciators will turn on again, together with the OPR annunciator. NOTE: Recalling data from unused (ie, empty) locations will give a zero reading. To Erase Data Locations (Meter Mode): 1. Individual data locations can be erased by recalling the location to be cleared, followed by a CLEAR key input. Note that the annunciator for the cleare
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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 temper
