Ametek ATC-125 -90°C to 125°C (-130°F to 257°F) Advanced Temperature Calibrator
The JOFRA ATC-125 ultra cooler is the first dry-block calibrator on the market offering the widest temperature range ever for cooling dry-blocks from 125°C down to -90°C!
The unique free piston stirring cooler technology sets new standards for optimum temperature calibrations in frozen and deep frozen applications.
The JOFRA ATC-125 ultra cooler features a unique technology for optimum performance and superior temperature homogeneity throughout the block at very low temperatures. The ATC-125 has a performance equivalent to a liquid temperature bath and features the widest temperature range for any cooling dry-block on the market today.
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.
The ATC-125 ultra cooler is part of a series of calibrators, that includes the ATC-140 (-20 to 140°C) and the ATC-250 (28 to 250°C) available as liquid bath or large diameter dry-block calibrators, and the ATC-156, ATC-157, ATC-320 and ATC-650 dry-block calibrators covering temperature ranges between -45°C and 650°C.
Features:
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Wide temperature range
ATC-125 ultra cooler: -90°C to 125°C / -130°F to 257°F
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Portable calibration at low temperature
State of the art cooling technology ensures energy efficiency, environmental friendliness and portable calibration
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High accuracy
Using the internal reference or the external reference probe. 4-wire True-Ohm-Measurement technology is used
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Improved temperature homogeneity
Unique dual-zone block ensures good temperature homogeneity in the critical calibration zone
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Cost effective calibration system
Stand-alone operation eliminates the need for secondary equipment and PC. Universal inputs handle multiple type temperature sensors
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Time saving features
Up- and download complete calibration tasks. Auto-stepping, switch testing and many more features make the daily use smooth and fast
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Documentation made easy
RS232 communication and JOFRACAL calibration software are included in the standard delivery
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Complete marine program
Part of a complete program of marine approved temperature, pressure and signal calibrators; including temperature sensors
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Unique Temperature Performance
The ATC series of calibrators provide precision temperature calibration of sensors; whatever the type or format. This is accomplished through an innovative dual-zone technology.
The JOFRA ATC-125 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.
Efficient Cooling Techniques
The ATC-125 with both heating and cooling capabilities features the FPSC (Free piston stirling cooler) as cooling source. The FPSC is a Stirling heat pump that uses a small amount helium gas as a heat transport medium, instead of standard refrigerants. The FPSC has an advantage, over traditional cooling systems, both in energy efficiency and environmental friendliness. These advantages are accomplished using state of the art technology and by virtue of being Freon, CFC and HFC free.
The FPSC has two major moving parts (piston and displacer) that oscillate in a linear motion along the same axis within a single cylinder which is installed in a stainless steel casing. The piston repeatedly compresses and expands the helium gas to cool the tip (cold head) of the extended part of the casing. The FPSC can be used to cool an object down to a temperature between -50°C and -100°C at an ambient temperature condition of 23°C. The FPSC has a high efficiency. It can be as much as 6 times higher than thermoelectric (Peltier) coolers.
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 JOFRA ATC-125 calibrator employ the MVI by running on stabilized DC voltage, thus avoiding any stability problems (MVI).
Highest Accuracy (Model B Only)
ATC series calibrators may be supplied with a built-in reference thermometer for use with an external probe. 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 external 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.
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.
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 readible 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 thetemperature 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-undertest (SUT), conversion to temperature, display contrast, etc. The setup may be recalled at any time.
SET-Follows-TRUE (Model B Only)
Available on B models only, 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 (Model B Only)
The ATC series model B is equipped with built-in converters (inputs) that enables measurement of virtually any type of temperature sensor including:
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 (Model B Only)
Users may perform a thermoswitch test and find “Open”, “Closed” and the hysteresis (deadband) automatically. The instrument retains the last five tests.
Specifications:
Specifications (Model B Only):
Physical Specifications:
RTD Input:
Thermocouple Input:
Functional Comparison:
Jofracal Calibration Software:
JOFRACAL calibration software ensures easy calibration of RTD´s, thermocouples, transmitters, thermoswithes, pressure gauges and pressure switches. JOFRACAL can be used with JOFRA DPC-500, APC, CPC and IPI pressure calibrators, all JOFRA temperature calibrators, as well as JOFRA AMC900, ASC300 multi signal calibrator and ASM-800 signal multi scanner.
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 allows the ATC calibrator to:
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Operate as a stand-alone instrument, using advanced calibration routines without the assistance of a personal computer on site;
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Prevent unauthorized changes to a calibration routine. Personnel who are not authorized to alter a calibration routine cannot do so.
Once all calibrations are completed, the data may be uploaded to the JOFRACAL calibration software for postprocessing and printing of certificates. The calibration data collected may be stored on the personal computer for later recall or analysis. The JOFRACAL temperature calibration software may be donwloaded free of charge from the web-page www.jofra.com.
As Found/As Left (Model B Only)
The JOFRA 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.
Calibration (Model B Only)
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” before the calibration takes place.
Calibration of up to 24 Sensors with JOFRA ASM
Using the JOFRA 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 the 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.
JOFRACAL Software
Minimum hardware requirements for JOFRACAL calibration software.
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INTEL TM 486 processor (PENTIUMTM 800 MHz recommended)
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32 MB RAM (64 MB recommended)
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80 MB free disk space on hard disk prior to installation
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Standard VGA (800 x 600, 16 colors) compatible screen (1024 x 786, 256 colors recommended)
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CD-ROM drive for installation of the program
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1 free RS232 serial port
Optional Probe Inserts:
