High Precision Handheld
Calibrator/Thermometers

• 0.5°F Accuracy Over the Range of 18°C to 28°C (64°F to 82°F)
• NIST Traceable Certificate of Calibration
• Simulates and Measures Thermocouples, RTDs, Thermistors and Ohms
• 0.1°F/0.1°C Resolution
• 10 Memory Locations for Saving Meter Readings and/or Calibrator Outputs
• Step Calibrator, Meter Hold, Thermometer Functions
• Ramp Function (Models CL25 and CL27)

The OMEGA CL20 series calibrator/ thermometers simulate, measure and record RTD, ohm, thermocouple and thermistor signals all in one meter. They outperform the competition in the lab and on the factory floor with 0.5°F accuracy and in ambient temperatures from 18° to 28°C ( 64° to 82° F).

This powerful handheld meter allows the user to calibrate in the field as well as in the lab and offers many additional functions that translate into cost-effectiveness, increased productivity and long-lasting versatility and reliability.

The 5-digit LCD display indicates all active functions and allows users to have 0.1° resolution in both Fahrenheit and Celsius. This convenient display takes the guesswork out of which sensor has been selected, displaying °F or °C and operating mode.

Programming a CL20 series calibrator is a snap. The keypad allows direct entry of calibrator setpoints. Setpoints can also be entered from an outside source by inputting temperatures or voltages through the thermometer mode. There are no reprogramming hassles. The program won't be lost when the meter is shut off. All values are retained and can be retrieved for fast repeat use.

These calibrators feature 10 memory locations that can instantly recall any programmed value, and the step function lets the user run through the test points at the push of a button. This efficient feature saves time by allowing the user to just enter the output value and calibrate.

The ramp function of Models CL25 and CL27 makes calibrating switch and alarm setpoints quick and easy. By entering the upper limit, lower limit and step size, the meter automatically ramps between the limits. There is also a manual ramp function.

No matter what thermocouple type is used, one of these meters can handle it. Features to choose from include 100 ohm and 1000 ohm RTD and 2252 ohm thermistor capabilities.

SPECIFICATIONS:

Display: 5-digit LCD custom indicators for calibration type, units hold, recall, store, operating mode, bal, loaded memory locations (up to 10)
Keypad: Momentary switches with tactile feedback, select power, thermocouple type, units, resolution, hold, store/recall, stop/clear, operating mode
Configuration Retention: selected operating mode, thermocouple type, units, resolution and memory contents retained on power off
Diagnostics: low battery, open input, invalid keypad entry, out of range, internal hardware fault
Accuracy: see ordering matrix for details Ambient Temperature: 0 to 50°C (32 to 122°F), 0 to 90% RH
Reading Rate: 1 per second
Input Current: 50 nA typical(meter mode)
Output Load: 100 ohms, min. (calibrator mode) Max. Common Mode Voltage:42 V peak to earth ground
Power: 9 Vdc battery
Battery Life: 16 hrs alkaline
Dimensions: 178 H x 74 W x 28 mm D (7.0 x 2.9 x 1.1")
Weight: 340 g (12 oz.)

full scale B,R,S,G,C,D,J-DIN ±0.5°F from -50 to 1250°F 0.04% over 1250°F

To Order (Specify Model Number)
Model Number	Price	Features
		TC Types	Platinum RTDs	Thermistor	Resistance 0 to:	Resistance Resolution	Accuracy Calibrator & Thermometer	Ramp Feature
CL23A*	$545	K,J,T	¯	¯	¯	¯	±0.5°F from -50 to 1250°F 0.04% over 1250°F ±1.0°F under -50°F	-
CL23EC*	545	K,T,E,J-DIN	¯	¯	¯	¯	±0.5°F from -50 to 1250°F 0.04% over 1250°F ±1.0°F under -50°F	-
CL24	600	K,J,T,E	¯	¯	¯	¯	±0.5°F from -50 to 1250°F 0.04% over 1250°F ±1.0°F under -50°F	-
CL25	845	K,J,T,E,N, R,S,B,G,C,D	¯	¯	¯	¯	±0.5°F full scale K,J,T,E,N	Yes
CL25EC	845	K,J,T,E,N, R,S,B,G,C, J-DIN	¯	¯	¯	¯	1.5°F full scale B,R,S,G,C,D ±0.5°F full scale K,J,T,E,N,1.5°F	Yes
CL26	895	K,J,T,E	100	400 Series 2252	100k 100á₧	1 0.01 ₧	±1.0°F under -50°F Ohms: 0.04% of range ±0.5°F RTD & thermistor ±0.5°F full scale K,J,T,E,N	Yes
CL27	1095	K,J,T,E,N, R,S,B,G,C,D	100 1000	¯	1k 100	0.1 0.01	±1.5°F full scale B,R,S,G,C,DOhms: 0.02% of range 0.2°F full scale RTD ±0.5°F full scale K,J,T,E,N	Yes
CL27EC	1095	K,J,T,E,N, R,S,B,G,C, J-DIN	100 1000	¯	1k 100	0.1 0.01	±1.5°F full scale B,R,S,G,C,D,J-DIN; Ohms: 0.02% of range 0.2°F full scale RTD	Yes
CL28MA	495	0 to 21 mA simulator/meter ±0.05% of range						Yes
*Note: Not compatible with Type E thermocouple Each CL20 series unit is supplied as a complete kit with 4 beaded wire thermocouples (J,K,T,E), 4 TAS standard to mini thermocouple adaptors (J,K,T,E), 4 calibration cables (J,K,T,E), shock resistant holster, belt clip, integral tilt stand/handle, wrist strap, rugged carrying case, and certificate of calibration. The CL26 and CL27 also include one 3-wire RTD calibration cable, one 2-wire resistance cable and one TA4F RTD adaptor. CL23A does not include type E thermocouple, adaptor or cable. Ordering Examples: CL24 J/K/T/E calibration/thermometer kit, $600. CL26 J/K/T/E, thermistor and RTD calibration/thermometer kit, $895.

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