Ametek ATC650A Advanced Temperature
Dry Block Calibrator 33 to 650°C (91 to 1202°F)

  • Dry Block Calibrator (122 to 1202°F) 50 to 650°C, Enhanced
  • Dual-Zone Heating Block-ensures temperature homogeneity throughout the block. Performance equivalent to liquid temperature bath
  • Enhanced Accuracy and Stability by the built-in reference sensor. MVI circuitry ensures stability despite mains supply variations
  • Universal Inputs-handles multiple type temperature sensors, no need for multiple instruments.
  • Automatic, stand alone calibration system. Upload/download your calibration routines
Click here for larger image - Ametek ATC650A Advanced Temperature Dry Block Calibrator (122 to 1202°F)Click here for larger image - Ametek ATC650A Advanced Temperature Dry Block Calibrator (122 to 1202°F)
Ametek ATC650A Shown
Product Information
Datasheet 1.35 MB
Ordering Guide
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The Ametek ATC series (Advanced Temperature Calibrators) combines the accuracy of laboratory temperature sources with the speed and portability of field dry-block calibrators. The unique dual-zone design sets new standards for optimum temperature performance bin dry-block calibrators.

The Ametek ATC-650A all features the unique dual-zone heating block - designed for optimum performance and superior temperature homogeneity throughout the block. This new design has a performance equivalent to a liquid temperature bath. The ATC-650A features the widest temperature range for a cooling dry-block on the market today.

Each ATC dry-block calibrator may be used to perform fully automatic calibration routines without using an external computer. Use the computer for full upload and download capabilities. Units may also be supplied with inputs for external reference sensors and for sensors-under-test. All ATC calibrators feature RS232 serial communication and standard delivery also includes the JOFRACAL  calibration PC software.

The ATC series of calibrators provide precision temperature calibration of sensors; whatever the type or format. This is accomplished through an innovative dual-zone heating technology.

The Ametek ATC-650AS all feature a dual-zone heating technology. Each heating zone is independently controlled for precision temperature calibration. The homogeneity in the lower part is close to that of a laboratory liquid bath. The lower zone ensures optimum heat dissipation throughout the entire calibration zone. The upper zone compensates for heat loss from the sensor-under-test and from the open top. This design also eliminates the need for insulation of the sensors-under-test and makes it possible to calibrate liquid-filled and other mechanical sensors.
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 Ametek ATC-650 calibrators 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.

Highest accuracy
ATC series calibrators may be supplied with a built-in reference thermometer for use with an external sensor. This feature allows one instrument to provide the freedom and flexibility to perform calibrations at the process site while maintaining a high accuracy.

A special 90° angled external reference sensor has been designed to accommodate sensors with a transmitter head, top connector or similar arrangement. The user can decide whether to read the built-in reference sensor or the more accurate angled reference sensor from the calibrator’s large, easy-to-read LCD display. The external sensor and the internal sensor are independent of one another. Downloading of reference sensor linearization is done via a personal computer.

Available on the ATC650B, the “SET-Follows TRUE” makes the instrument tune in until the temperature of the external reference “TRUE” meets the desired “SET” temperature. This is used when it is critical that the temperature of the calibration zone matches the desired temperature when measured with accurate external reference sensors. This feature is ideal when calibrating gas correctors or other custody transfer applications. It is also extremely useful to calculation procedures.

Reading of sensor-under-test
The ATC650 is equipped with built-in converters (inputs) that enables measurement of virtually any type of temperature sensor including:
  • thermostats
  • resistance thermometers (RTD)
  • thermocouples (TC)
  • transmitters
  • milliamps (mA)
  • voltage (V)
The ATC calibrators can be user-programmed for completely automated temperature calibrations. Once the unit is programmed, the instrument operates itself by performing the configured calibration routine. All calibration data is stored and available for uploading and generating exact calibration certificates or reports

Switch test
Users may perform a thermo switch test and find “Open”, “Closed” and the hysteresis (deadband) automatically. The instrument retains the last five tests.

Easy-to-use, intuitive operation
All instrument settings can be performed from the front panel. The heat source is positioned away from the panel which helps protect the operator. The ATC keyboard is equipped with five, positive feedback function keys. They correspond to the text in the display and change functionality based on instrument operations. There are also dedicated function keys with permanent functions.

The easy-to-read, backlit display is large with a high contrast that is readable even in high ambient light conditions. The display is easily read from all angles and from a distance without parallax problems. The display also features icons which help identifying instrument conditions and operational steps, making it more intuitive to work with.

Set temperature
The “Set temperature” feature allows the user to set the exact desired temperature with a resolution of 0.01°.

Enhanced stability
A stability indicator shows when the ATC calibrator has reached the desired temperature and is stable. The user may change the stability criteria, external reference and the sensor-under-test quickly and simply. The stability criteria is the user’s security for a correct calibration. A count-down timer is displayed next to the temperature read-out.

Instrument setups
The ATC series allows the user to store up to nine (9) complete instrument setups. You may store all sorts of information including temperature units, stability criteria, use of external reference sensor, resolution, sensor-under-test (SUT), conversion to temperature, display contrast, etc. The setup may be recalled at any time.

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 exposures to high temperatures. This feature can be locked with an access code.
JOFRACAL  Calibration Software
The JOFRACAL  calibration software ensures easy calibration of RTD´s, thermocouples, transmitters, thermoswithes, 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.


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.

As found/as left
The Ametek ATC series calibrator automatically handles “As Found/As Left” calibrations. The calibrator stores both results. The first performed calibration is “As found” and the last performed calibration is the “As left”, regardless of the number of calibrations/adjustments that may have been made in between.

SYNC output
An output is located directly on the front of the ATC calibrator. This output signals when the instrument is stable and may be used with ancillary devices such as video recorders, digital cameras or as an input to a data logging device. The SYNC output may be useful for automating and documenting your calibrations when calibrating external reading devices

Users may perform or read the results of the calibration tasks directly on the instrument. When calibrating an indicating device, users may key in the results during or after the test. Using the “Calibration info” function, the user may view the complete calibration task, including the “Scenario” be-fore the calibration takes place.
ATC-650B Specifications
Main specifications
Voltage 115V(100-127)
Frequency, non US deliveries 50 Hz ±5, 60 Hz ±5
Frequency, US deliveries 60 Hz ±5
Power consumption (max) 1150 VA
Temperature range 33 to 650°C / 91 to 1202°F
Resolution Selectable 1º or 0.1º
Stability (@650°C / 1202°F) +0.02°C / +0.036°F
Time to stability 10 Minutes
Resolution 1° or 0.1° or 0.01°
Accuracy +0.11°C / +0.20°F
Accuracy with internal reference sensor (@650°C / 1202°F 0.35°C / +0.63°F
Immersion depth 150 mm / 5.9 in
Well Diameter 30 mm / 1.18 in
Heating time 50 to 320°C / 122 to 608°F 10 minutes
50 to 650°C / 122 to 1202°F 27 minutes
Cooling time 650 to 100°C / 1202 to 212°F 43 minutes
100 to 50°C / 212 to 122°F 25 minutes
SYNC output (dry contact) Switching Voltage Maximum 30 VDC
Switching Current Maximum 100 mA
Input Specifications
Transmitter supply Output voltage 24VDC +10%
Output current Maximum 25 mA
Transmitter input mA Range 0 to 12 VDC
Accuracy (12 months) +0.005% Rdg. +0.015% F.S.
Voltage input VDC Range 0 to 12 VDC
Accuracy (12 months) +0.005% Rdg. +0.015% F.S.
Switch input Test voltage Maximum 5 VDC
Test current Maximum 2.5 mA
Input Specifications (RTD)
RTD Type


4-wire RTD with true ohm measurements
True ohm measurements are an effective method to eliminate errors from induced thermoelectrical voltages
2-wire RTD
3-4 wire RTD
F.S. (Full Scale) 350 ohm or 2900 ohm
Accuracy (12 months) ±0.005% rdg. + 0.005% F.S. + 50 m
RTD Type

RTD Type Input Chart >>

Input Specifications (Thermocouple)
Thermocouple Type


78 mV

F.S. (Full Scale) 78 mV
Accuracy (12 months) 0.01% rdg. + 0.005% F.S.
Thermocouple Type

Thermocouple Input Chart >>

Physical Specifications
Instrument Weight 1.8 kg / 3.9 lb
Size (L x W x H) 172 × 72 × 182 mm / 6.8 × 2.8 × 7.2 in
Ordering Guide
Model Product Description
ATC-650 series, 33 to 650°C (91 to 1202°F)
Code Model Version
Basic model no sensor-under-test or reference probe input
Including sensor-under-test or reference probe input
Code Mains Power Cable Type
European, 230V
UK, 240V
South Africa, 220V
Italy, 220V
Australia, 240V
Denmark, 230V
Switzerland, 220V
Israel, 230V
Code Insert Type and Size
1 x Insert for dry-block configuration
Code Calibration Certificate
NPL Traceable temp. certificate(standard for Europe, Asia, Australia and Africa)
NIST traceable temperature certificate(standard for Americas)
Accredited certificate
Code Options
Basic calibration kit
Carrying case
90° angled reference sensor with accredited certificate (STS100A901AH)
No option used
Sample Order Number
ATC650B230AM01FX - JOFRA ATC-156 B with standard accessories, 230VAC, European power cord, dry-block configuration with multihole insert type M01, and NPL traceable temperature certificate.
Ordering Information
Model Description Buy Online Price
ATC650A   Ametek ATC650A Dry Block Calibrator Discontinued
See: RTC Series
Included Accessories
  • 1 - Calibration software AMECAL-LIGHT
  • 1 - User & reference manual
  • 1 - Mains power cable
  • 1 - Shoulder strap
  • 1 - RS-232 cable
  • 1 - 1x predrilled insertion tube
  • 1 - Tool for insertion tube
  • 1 - Factory traceable calibration certificate
Optional Accessories
Insertion Tube (Predrilled Hole, Singular)
105676 Ametek 105676 Imperial Single hole Insertion tube - 4 x 1/8" diameter for ATC320A/B, ATC650A/B, ITC320/650A  Buy Now $195.00
105678 Ametek 105678 Imperial Single hole Insertion tube - 4 x 3/16" diameter for ATC320A/B, ATC650A/B, ITC320/650A  Buy Now $195.00
105680 Ametek 105680 Imperial Single hole Insertion tube - 4 x 1/4" diameter for ATC320A/B, ATC650A/B, ITC320/650A  Buy Now $195.00
105682 Ametek 105682 Imperial Single hole Insertion tube - 4 x 5/16" diameter for ATC320A/B, ATC650A/B, ITC320/650A  Buy Now $195.00
105684 Ametek 105684 Imperial Single hole Insertion tube - 4 x 3/8" diameter for ATC320A/B, ATC650A/B, ITC320/650A  Buy Now $195.00
105686 Ametek 105686 Imperial Single hole Insertion tube - 4 x 7/16" diameter for ATC320A/B, ATC650A/B, ITC320/650A  Buy Now $195.00
105688 Ametek 105688 Imperial Single hole Insertion tube - 4 x 1/2" diameter for ATC320A/B, ATC650A/B, ITC320/650A  Buy Now $195.00
105690 Ametek 105690 Imperial Single hole Insertion tube - 9/16" diameter for ATC320A/B, ATC650A/B, ITC320/650A  Buy Now $195.00
105692 Ametek 105692 Imperial Single hole Insertion tube - 5/8" diameter for ATC320A/B, ATC650A/B, ITC320/650A  Buy Now $195.00
Insertion Tube (Multi-Holes)
122758 Ametek 122758 Metric Multiple-hole Insertion tube (M05) for ATC320/650 & ITC320/650  Buy Now $345.00
122760 Ametek 122760 Metric Multiple-hole Insertion tube (M05) for ATC320/650 & ITC320/650  Buy Now $345.00
Insertion Tube (Packs, Blanks)
122719 Ametek 122719 Package of 5 blank insertion tubes for ATC320A/B, ATC650A/B  Buy Now $435.00
122721 Ametek 122721 Package of 5 blank insertion tubes w/ 4mm hole for ATC320A/B, ATC650A/B, ITC320/650A  Buy Now $585.00