JOFRA ATC Series - Advanced Temperature Calibrator

The unique active dual-zone heating block is designed to ensure optimum temperature homogeneity in the calibration zone of the block. This design eliminates the major uncertainties due to heat loss through the sensor-under-test and from the top of the block. The dry-block design combined with the external reference sensor input make the ATC series as accurate as a laboratory calibrator but maintain the speed and portability of a dry-block.

The ATC measures the output from the sensor-under-test directly: Thermocouples, RTD, mV, mA, and V. There is no need for multiple instruments. The JOFRA ATC series saves time by performing automatic stand-alone calibrations. Just run the downloaded work orders from the JOFRACAL calibration software. After completion of the work orders, the results may be downloaded into the computer for analysis, filing, and printing of certificates.

Two models of the ATC series (ATC-140 and ATC-250) fitted with a 160 mm deep well with a diameter of 63.5 mm (2.5 in) can be used both as dry-block calibrators and as liquid calibration baths with a magnetic stirrer. This is of great relevance when calibration several sensors or when calibrationg liquid and odd/big size sensors.

Models and temperature ranges

ATC-125    -90°C to 125°C (-130°F to 257°F) 
ATC-140    -20 to 140°C (-4 to 284°F)
ATC-156    -24 to 155°C (-11 to 311°F)
ATC-157    -45 to 155°C (-49 to 311°F)
ATC-250    28 to 250°C (82 to 482°F)
ATC-320    33 to 320°C (91 to 608°F)
ATC-650    33 to 650°C (91 to 1202°F)

Features for the ATC

• All units with dual-zone heating block
• ATC-125 down to -90°C
• ATC-140 and ATC-250 as liquid bath
• ATC-140 and ATC-250 as large diameter dry-block calibrator
• Universal input for sensor-under-test
• Input for external reference probe
• Automatic switch test
• RS232 and JOFRACAL calibration software
• Multi information display + numeric keyboard
• Autostepping
• Stability indicator
• Count-down timer (shows when unit is stable)
• Automatic, stand-alone calibration system
• Up- and download of work orders (calibrations)
• MVI Mains Variance Immunity 

JOFRA ATC-125 - the coolest temperature calibrator in the world
The JOFRA ATC-125 ultra cooler features a unique free piston stirling cooler technology for optimum performance and superior temperature homogeneity throughout the block at very low temperatures. The JOFRA ATC-125 ultra cooler is the world’s first temperature dry-block calibrator capable of reaching -90˚C. Featuring patent-applied for Free Piston Stirring Cooler (FPSC) technology for cooling, together with a special heating element, the ATC-125 offers high accuracy, excellent stability and extremely fast heating and cooling times.

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. The ATC-125 may also be supplied with inputs for external reference sensors and for sensors-under-test. All ATC calibrators feature RS232 serial communication and the standard delivery also includes the JOFRACAL calibration PC software.

Trouble-free calibration of sanitary and short temperature sensors
JOFRA offers a complete, highly accurate, and portable calibration solution for calibration of sanitary and short temperature sensors, thus avoiding cumbersome and lengthy calibrations in liquid baths and older dry-block calibrators. The basic solution is a small reference sensor, which is placed in parallel with the sanitary or short sensor in the dry-block, featuring the dual-zone technology. Additionally, a sanitary kit has been designed around the ATC-156 B dry-block calibrator, and customized inserts and the short reference sensor have furthermore been developed specifically for this application.

 

MVI - Mains Variance Immunity MVI - Mains Variance Immunity Temperature dry-block calibrators from AMETEK 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. JOFRACAL calibration software JOFRACAL calibration software ensures easy calibration of RTD´s, thermocouples, transmitters, thermoswithes, pressure gauges and pressure switches.