Dual-Zone: Active Control and Central Control

Dual-Zone: Active Control and Central Control

Reliable Temperature Source – Most Important

A good user interface and integrated solutions offer you time savings and easy handling of even difficult calibration jobs. But your temperature calibration measurement quality is still dependent on the temperature source’s quality.

The temperature block should be really stable and have good temperature homogeneity at the same time. This is vital because the sensors-under-test could have varied measurement zones. Also, as the sensor-under-test will act as a thermal load in the block throughout the calibration, it is important that the block keeps good homogeneity even with multiple numbers of probes and with large probes.

The new dual-zone design of the heating block is the most innovative step taken to solve the thermal problems mentioned above. Ametek has developed two different versions of the dual-zone principle – the ACTIVE-CONTROL and the CENTRAL-CONTROL versions. Both versions eliminate the requirement for insulation of the sensors-under-test and make it probable to calibrate liquid filled and especially other mechanical sensors.

State-of-the-art Well Design – Optimized for Accuracy

Dual-zone heating block: Active-control

The heating block is constructed in two zones, with a SEPARATE active-control of each zone. The lower part of the block of the homogeneity is similar to that of a liquid bath’s laboratory. The lower zone controls the temperature of the calibration.

The upper zone compensates for the loss of heat through the sensor-under-test and from the top of the block and ensures a good homogeneity independent of the load. The active-control dual-zone heating blocks are used in the JOFRA ATC-Series.

Dual-zone heating block: Central-control

This type of heating block is constructed in two zones, with central-control of the zones. The main zone (lower zone) guarantees optimum heat dissipation all over the whole block.

The upper zone makes up for the loss of heat from the top of the block and from the sensor-under-test, and is adjusted to deliver a good homogeneity in the block. The central-control dual-zone heating blocks are utilized in the JOFRA temperature calibrators ITC 320 A and ITC 650 A.

Source by: Ametek