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14 Thermocouple Types and Millivolt Calibrator & Simulator

Thermocouple Simulator
  • RoHS Icon
  • CE Approved


Item# CL540ZA

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 C$1,799.76
5-9 C$1,709.77
10-24 C$1,673.78
25-49 C$1,601.79
50-99 C$1,565.79
100+ C$1,529.80

In stock

Lead Time (If not in stock): 5 weeks
Thermocouple Simulator CL540ZA CL540ZA
  • Source 14 Thermocouple Types
  • Easy-to-Read Backlight Display
  • Easily Change Thermocouple Types and Scale
  • Calibrate Directly in Temperature (°C or °F)

CL540ZA Model Options

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Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination.

Type of Thermocouple Signals
Type of RTD signal
Type of Thermistor Signal
Accuracy Value
Communications Protocol
Battery Run Time
Additional Features

With the CL540ZA you can check and calibrate all your thermocouple instruments. Connect via a miniature thermocouple connector on the top end of the source. Use your own thermocouple wire connectors or order one of the cable accessories for easy operation out of the box. Easy to operate even in the dark areas of the plant with the backlit display. Stop carrying around a millivolt source and thermocouple tables. The CL540ZA works with the thermocouples you use including Types J, K, T, E, R, S, B, N, G, C, D, L (J-DIN), U (T-DIN) and P (Platinel II). Easily set any value quickly to within 0.1° with the adjustable digital potentiometer “DIAL” plus store any three temperatures for instant recall with the selector switch. You can also calibrate from -13.000 to +80.000 mV. Connect directly to the thermocouple inputs of smart transmitters, PLCs, controllers and multichannel recorders and verify their outputs or displays.

Accuracy: ±(0.015% of Reading + 0.006 mV)
Cold Junction Compensation: ±0.25°C (±0.45°F)
Operating Temperature Range: -25 to 60°C (-10 to 140°F)
Millivolt Range: -13.000 to 80.000 mV
Relative Humidity Range: 10% ? RH ? 90% 0 to 35°C (32 to 95°F), non-condensing. 10% ? RH ? 70% 35 to 60°C (95 to 140°F), non-condensing
Dimensions: 126 L x 69 W x 45 mm D (4.96 x 2.73 x 1.79")
    With Boot: 144 L x 78 W x 52 mm D (5.67 x 3.06 x 2.05")
Weight: 238 g (8.4 oz) (including batteries)
    With Boot: 311.8 g (11 oz) (including batteries)
Batteries: Four "AA" Alkaline 1.5V (included)
Battery Life: 50 hours
Low Battery: Low battery indication with nominal 1 hour of operation left
Protection Against Misconnection: Over-voltage protection to 60 Vdc (rated for 30 seconds)
Display: High contrast graphic liquid crystal display. LED backlighting for use in low lit areas
    Output Impedance: < 0.3 ?
    Source Current: > 20 mA (drives 80 mV into 10 ?)
    Noise: ?4 microvolts p-p for frequencies of 10 Hz or below
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Rated 5 out of 5 by from Thermocouple injector Excellent product! Affordable price too. Best injector I have ever used.
Date published: 2017-11-15
Rated 4 out of 5 by from Works well but lacks the speed adjust Purchased this to replace an older model. We liked several of the upgrades but miss the ability to quick adjust the temperature (mV) output.
Date published: 2016-02-12
Rated 5 out of 5 by from Awesome tool! Excellent tool for troubleshooting/testing controls
Date published: 2024-05-24
Rated 4 out of 5 by from Very handy and effective Great working product, nice an handy when trouble shooting or needing to verify temps.
Date published: 2018-10-17
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Can we use this CL540ZA Model for Thermocouples type P Thanks AM

Asked by: ANDMIR
Hi Andmir, Thank you for the inquiry. This calibrator does not have a range for type P. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2023-10-07

CL540Z calibrator use : for different different types of thermocouple types we need to use different different types of thermocouple wires for calibration or who we need to verify all the thermocouple modules?

Asked by: Swapna
Thank you for your inquiry Swapna. That is correct to use different thermocouple types you need to use the corresponding thermocouple wire to make sure you are using the correct metals with the specific thermocouple type. If this is not follow then you will not be using this unit correctly.
Answered by: Application Engineer MC
Date published: 2022-12-16

Does this simulator come with an NIST calibration cert?

Asked by: Chris Lew
Hi Chris, Thank you for the inquiry. Yes, this product includes NIST certificate. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2024-01-16

We use &quot;two point&quot; thermocouples to measure surface temperature of aluminum. Could this simulator be used to check the two point devices periodically?

Asked by: JimMacC
The CL540Z will only simulate a thermocouple. This device is used to check instrument display for correct response. The devices to check the probes are as follows; CL514-PLUS or the low cost CL3512A If you have a stable surface temperature that can be verified with reference probe then you can use the above meters to verify the probe readings by comparison check. Please contact us anytime with any further questions.
Answered by: Jane
Date published: 2019-06-13
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Rubber boot
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0.6 m (2') thermocouple cable, SMP male to spade lugs, type J
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Retractable cable 0.6 m (2'), Type J
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