Jofra ATC-125 ultra cooler from Ametek Calibration Instruments is the world's first dry-block calibrator capable not only of reaching -90C but to have a temperature range of 215C (-90 to 125C)
Featuring patent-applied for free piston stirring cooler (FPSC) technology for cooling, together with a special heating element, the ATC-125 offers high accuracy and excellent stability.
Most importantly, its extremely fast heating and cooling makes a five point calibration up to five times quicker than with an equivalent liquid bath.
It can be used equally as easily in a laboratory or factory environment.
Ideally suited to calibration applications in the pharmaceutical, food, food ingredients, hospital and marine industries, the ATC-125 can be used to perform fully automatic calibration routines without the need for a PC.
However the unit is also fully compatible with PC operation and is supplied complete with Jofracal calibration software.
The patent-applied for FPSC is a Stirling heat pump in a lightweight (290g) compact unit that is up to six times more efficient than more commonly used Peltier coolers.
It uses a small amount of helium gas as the heat transport medium instead of conventional refrigerants such as CFCs, HFCs and Freon, making it environmentally friendly.
Since it is a dry block calibrator, no expensive or hazardous (flammable) liquids are used which may require special ventilation.
In addition, the entire temperature range can be reached without liquid changes.
In addition to the revolutionary new cooling technology, the ATC-125 utilises the well-proven ATC Series dual-zone control technology to ensure precision calibration of sensors.
The lower zone in the system ensures optimum temperature distribution throughout the entire calibration zone, while the upper zone compensates for heat loss from the sensor under test.
High accuracy of + 0.3C with the internal reference sensor and + 0.06C with an external reference sensor can be achieved and there are no measuring errors due to thermoelectric effects or cable resistance.
In addition, the unit is supplied with mains power variance immunity (MVI) for improved temperature stability.
MVI removes stability problems by immediately identifying variations in the mains input voltage.
The MVI circuitry maintains a constant energy flow to the temperature block to provide a problem-free calibration with a stability that the operator can trust.
The ATC-125 offers extraordinary versatility for calibrating different diameter sensors and multiple sensors.
A variety of inserts are available ranging from a single hole insert for use with one sensor and the internal reference sensor to up to 24 or more sensors under test simultaneously with an external reference sensor.
Standard or custom sensor inserts are available with holes in both metric and imperial sizes.
