Ametek ATC-320A Advanced Temperature Calibrator
Dry Block

    ATC-320 Series Features:
  • Temperature range 33 to 320°C (91 to 608°F)
  • 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 main supply variations
  • Stand-alone operation eliminates the need for secondary equipment and PC.
  • RS232 communication and JOFRACAL calibration software are included in the standard delivery.

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Ametek ATC-320A Shown

Product Information
Datasheet 1.65 MBpdf
Software Information
Ordering Guide
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The Ametek ATC-320A 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-125 ultra cooler calibrator may be used to perform fully automatic calibration routines without using an external computer. It is also possible to use the computer for full upload and download capabilities. All ATC calibrators feature RS232 serial communication and the standard delivery also includes the JOFRACAL calibration PC software.

Unique temperature performance

The JOFRA ATC-320 features dual-zone technology. Each zone is 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 temperature distribution throughout the entire calibration zone. The upper zone compensates for heat loss from the sensor-under-test.

MVI - Improved temperature stability

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 JOFRA ATC-320 calibrator employ the MVI by running on stabilized DC voltage, thus avoiding any stability problems (MVI).

Features ATC-320 Series Details
Set temperature The “Set temperature” feature allows the user to set the exact desired temperature with a resolution of 0.01°.
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.
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.
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 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.
Auto-stepping Up to 20 different temperature steps may be programmed including the hold time for each step. Upon completion of an auto step routine, the user can easily read the results for the sensor-under-test. Up to five (5) auto step results are stored.
ATC-320A Specifications
Main specifications
Voltage 115V(90-27)
Frequency, non US deliveries 50 Hz ±5, 60 Hz ±5
Frequency, US deliveries 60 Hz ±5
Power consumption (max) 1150 VA
Temperature range 33°C to 320°C / 91°F to 1202°F
Resolution Selectable 1º or 0.1º
Stability +0.01°C / +0.018°F 1)
Measured after the stability indicator has been on for 10 minutes. Measuring time is 30 minutes.
Time to stability 10 Minutes
Resolution 1° or 0.1° or 0.01°
Accuracy (with Internal Reference Sensor) +0.20°C / +0.36°F
Radial Homogeneity
(difference between holes)
0.01°C / 0.02°F
Immersion depth including insulation plug 150 mm / 5.9 in
Well Diameter 30 mm / 1.18 in
Heating time 50 to 320°C / 122 to 608°F 7 minutes
Cooling Time 320 to 100°C/ 608 to 212°F 22 minutes
100 to 50°C / 212 to 122°F 20 minutes
SYNC output (dry contact) Switching Voltage Maximum 30 VDC
Switching Current Maximum 100mA
Physical Specifications
Instrument Weight 10.2 kg / 22.5 lb
Size (L x W x H) 352 x 156 x 360 mm / 3.9 x 6.1 x 14.2 in

JOFRACAL Calibration Software

The JOFRACAL calibration software ensures easy calibration of RTD´s, thermocouples, transmitters, thermo-switches, pressure gauges and pressure switches.

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 ATC calibrator stores the calibration procedure and may be taken out to the process site without using a personal computer.

This then allows the Calibrator to:

  • Operate as a stand-alone instrument, using advanced calibration routines without the assistance of a personal computer on site;
  • Prevent unauthorized changes to a calibration routine. Personnel who are not authorized to alter a calibration routine cannot do so.

Calibration of up to 24 sensors with Ametek ASM

Using the Ametek ATC 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 the 7533PC page.

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
Ordering Guide
Model Product Description
ATC-320 series, 33 to 320°C (91 to 608°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
ATC320B230AM01FX - 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
ATC320A Ametek ATC-320A Dry Block Calibrator Discontinued
See: RTC Series
Included Accessories
  • 1 -Carrying case
  • 1 -Mains power cable (user specified)
  • 1 -Traceable certificate - temperature performance
  • 1 - Insert
  • 1 - Set of matching insulation plugs
  • 1 - Set of rubber cones for insulation plug
  • 1 - Tool for insertion tubes
  • 1 - JOFRACAL calibration software
  • 1 - AMETRIM-ATC Software to adjust the ATC series
  • 1 - Users’ manual (multi-language)
  • 1 - Reference manual (English)