Ametek CTC140A Compact
Dry Block Temperature Calibrator (-1 to 284°F)
See: CTC155

  • Enhanced stability-MVI circuitry ensures stability despite mains supply variations in the process environment
  • Timesaving features- Fast one-key-one-function access to the automatic switch test and auto stepping
  • Documentation made easy-optional RS-232 communications are available. Supplied with AMECAL-TEMPERATURE calibration software
Click here for larger image - Ametek CTC140 Compact Temperature Calibrator Dry Block CalibratorClick here for larger image - Ametek CTC650 Compact Temperature Calibrator Dry Block Calibrator (122 to 1202°F)
Ametek CTC140A Shown

Product Information
Datasheet 1.71 MBPDF
Ordering Info Jump to Product Models, Prices, Accessories, and Ordering Information
PDF HelpPDF Help
The CTC140A series is a fast dry-block that offers both interchangeable inserts, the MVI stability circuitry, and calibration software. Both speed and portability are superior to liquid baths. Dry-block calibrators do not require hazardous liquids and provide a wide temperature range.

The CTC140A series is designed for both on-site and maintenance shop use. The applications are generally critical process control but can vary based on calibration and testing requirements. The user interface is easy and intuitive. One-key-one-function gives you quick access to timesaving features such as the switch test or the auto-stepping function. All models feature a large, backlit LCD display panel, which is easy-to-read even in well-lit areas. Units feature an informative display that provides icons and information regarding the status of the CTC140A and the calibration in-progress.

A rugged, slim-line, aluminum outer casing with die-cast top and bottom protects the CTC650A of dry-block calibrators. For easy documentation and automatic calibration, all units are delivered with RS232 serial communication and JOFRACAL calibration software.

Peltier effect
The model CTC-140 A features Peltier elements. In 1834, Jean Peltier, a French physicist found that an ’’opposite thermocouple effect’’ could be observed when an electric current was connected to a thermocouple. Heat would be absorbed at one of the junctions and discharged at the other junction. This effect is called the ’’Peltier effect’’.

The practical Peltier element (electronic heating pump) consists of many elements of semiconductor material connected electrically in series and thermally in parallel. These thermoelectric elements and their electrical interconnections are mounted between two ceramic plates. The plates serve to mechanically hold the overall structure together and to electrically insulate the individual elements from one another.

Maximum temperature
From the setup menu, the user can select the maximum temperature limit for the calibrator. This function prevents damage to the sensor-under-test caused by the application of excessive temperatures. The feature also aids in reducing drift resulting from extended periods of expo-sures to high temperatures. This feature can be locked with an access code.

MVI - Improved temperature stability
MVI stands for "Mains power Variance Immunity". Unstable mains power supplies are a major contributor to on-site calibration inaccuracies. Traditional temperature calibrators often become unstable in production environments where large electrical motors, heating elements, and other devices are periodically cycled on or off. The cycling of supply power can cause the temperature regulator to perform inconsistently leading to both inaccurate readings and unstable temperatures.

The CTC series employ the MVI, thus avoiding such stability problems. The MVI circuitry continuously monitors the supply voltage and ensures a constant energy flow to the heating elements.

Easy-to-use, intuitive operation
All instrument controls may be performed from the front panel. The heat source is positioned away from the panel. This design helps to protect the operator. The main functions on the CTC series are designed with one-key-one-function logic. This means that there are no sub-menus or difficult to remember multiple keystrokes necessary to access primary functions. The easy-to-read, backlit display features dedicated icons, which help in identifying instrument conditions and operational steps.

Instrument setups
The CTC series stores the complete instrument setup, including: engineering units, stability criteria, resolution, display contrast, slope (ramp) rate, auto-step settings, and maximum temperature.

The CTC series has a very easy and straightforward procedure for re-calibration/adjustment. There is no need for a screwdriver or PC software. The only thing you need is a reliable reference thermometer.

Place the probe in the calibrator and follow the instructions on the display. Third-party labs and calibration facilities will be able to perform this function if a certificate from an independent source is necessary. Of course, AMETEK can provide you with a traceable calibration certificate from our labs when you require a higher level of confidence.
JOFRACAL Calibration Software
The JOFRACAL calibration software ensures easy calibration of RTD´s, thermocouples, transmitters, thermoswitches, pressure gauges and pressure switches. JOFRACAL can be used with Ametek DPC-500, APC, CPC and IPI pres-sure calibrators, all Ametek temperature calibrators, as well as Ametek AMC900, ASC300 multi signal calibrator and ASM-800 signal multi scanner.
Requirements Details
Minimum Requirements:
  • Intel Pentium II 1.4 GHz Processor
  • 64MB Ram (128MB recommended)
  • Standard VGA (800x600, 256 colors). 1024x768 Recommended
  • CD-Rom Drive for installation of program
  • 1 or 2 free RS-232 serial ports, depending on configurations
Minimum Requirements:
  • Microsoft Windows 98, Microsoft Windows NT 4.0, Microsoft Windows 2000,
  • Microsoft Windows ME, Microsoft Windows XP, Windows Vista
  • System fonts: MS Sans Serif, Arial
Calibration Software:   View PDF

JOFRACAL calibration software may also be used for manual calibrations, as it can be set up to accept manual entry of calibration data together with other liquid baths, ice points or dry-block heat sources. The calibration data collected may be stored on a PC for later recall or analysis. The ITC calibrator stores the calibration procedure and may be taken out to the process site without using a personal computer. Once all calibrations are completed, the data may be uploaded to the JOFRACAL calibration software for post-processing and printing of certificates. The calibration data collected may be stored on the personal computer for later recall or analysis.

Calibration of up to 24 sensors with Ametek ASM
Using the Ametek ITC series together with the ASM Advanced Signal Multi-scanner offers a great time-saving automatic solution to calibrate multiple temperature sensors at the same time.

The ASM series is an eight channel scanner controlled by JOFRACAL software on a PC. Up to 3 ASM units can be stacked to calibrate up to 24 sensors at the same time. It can handle signals from 2-, 3- and 4 wire RTD’s, TC’s, transmitters, thermisters, temperature switches and voltage.
For more info on the ADM Advanced Signal Temperature Mulit-Scanner, please visit to the 7533PC page.

Main specifications
Voltage 115V(90-127)
Frequency, non US deliveries 50 Hz ±5, 60 Hz ±5
Frequency, US deliveries 60 Hz ±5
Power consumption (max) 150 VA
Temperature range Maximum 140°C / 284°F
Minimum @ ambient temp. 0°C / 32°F -30°C / -22°F
Minimum @ ambient temp. 23°C / 73°F -17°C / 1°F
Minimum @ ambient temp. 40°C / 104°F -2°C / 28°F
Resolution Selectable 1º or 0.1º
Stability +0.05°C / +0.09°F
Time to stability 5 Minutes
Resolution 1° or 0.1° or 0.01°
Accuracy +0.4°C / +0.7°F
Immersion depth 115 mm / 4.5 in
Well Diameter 19.2 mm / 0.76 in
Switch Input Test Voltage Maximum 5 VDC
Test current Maximum 2.5 mA
Automatic Switch Test Finds Switching Temp. Open, Close, hysteresis
Slope rate, programmable 0.1 to 9.9°C/°F
Automatic Stepping Programmable Up to 9 steps
Dwell time on each Step Programmable
Enhanced Stability Unstable mains protection MVI Circuitry
Clear stability indication Yes, in display
Multi-information display Stability indicator MVI Circuitry
Countdown timer before stable 4 minutes
Temperature SET and READ simultaneously
Alphanumeric messages Yes
Calibration status icons Yes
Training mode (heating/cooling block disabled) Simulation of all functions Yes
Simulating heating and cooling Approx. 100° per minute
Heating time -17 to 23°C / 1 to 73°F 3 minutes
23 to 140°C / 73 to 284°F 15 minutes
Cooling time 100 to 0°C / 212 to 32°F 10 minutes
0 to -15°C / 32 to 5°F 16 minutes
140 to 100°C / 284 to 212°F 2 minutes
SYNC output (dry contact) Switching Voltage Maximum 30 VDC
Switching Current Maximum 100 mA
Service facilities Adjustment of the unit from the keypad Yes
Self explaining guide in display Approx. 100° per minute
Other information Displays serial number, software revision level, and last calibration date
Setup facilities Stability criteria Extra time before "stable indication" is shown
Display resolution 0.1° or 1°C/°F
Temperature units °C or °F
Slope rate 0.1 to 9.9°/minute
Maximum temperature Any value within range
Serial data interface RS232 (9-pin Male)
Temperature Operating 0 to 40°C / 32 to 104°F
Storage -20 to 50°C / -4 to 122°F
Humidity 0 to 90% RH
Protection class IP-10
DNV Marine Approval, Certificate no A-10384
Physical Specifications
Instrument Weight 7 kg / 15.5 lb
Size (L x W x H) 241 x 139 x 325 mm / 9.5 x 5.5 x 12.8 in
Ordering Information
Model Description Buy Online Price
CTC140A Ametek CTC140A Dry Block Calibrator (-1 to 284°F) Discontinued
See: CTC155
Included Accessories
  • 1 - Mains power cable
  • 1 - Manufacturer Traceable certificate - temperature performance
  • 1 - Insert
  • 1 - 3 piece insulation plugs for: 6, 10, 13 mm (1/4, 3/8, 1/2 in.) sensors (CTC-140 only)
  • 1 - Tool for insertion tubes
  • 1 - User’s manual (multi-language)
  • 1 - Reference manual (English)
  • 1 - Test cables (1 x red, 1 x black)
  • 1 - RS-232 cable & software
Optional Accessories
105173 Ametek 105173 10 Pack of Insulation Plates Buy Now $50.00