CRC series

Calibration reference cylinders

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amorphous plastic reference material
no directionally dependent thermal properties

Calibration reference cylinders

For thermal needle probes TP02/TP08, TP07 and TP09

CRC’s contain traceable thermal conductivity reference materials for calibration of Non-Steady-State Probes. There are several different CRC types. The geometry of the different types is adapted to fit needles with a certain diameter.

amorphous plastic reference material
no directionally dependent thermal properties

Specifications

test method	ASTM D 5334-00 and D 5930-9, IEEE Std 442-1981
temperature range	0 - 60 °C
thermal conductivity of reference	0.2 W/mK (nominal value)
traceability	to NPL National Physical Laboratory, United Kingdom

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CRC series design

The heart of the CRC cylinders is a specially manufactured amorphous plastic reference material. Contrary to other plastics, this material does not have any directionally dependent thermal properties. In the plastic material a hole is drilled, with the approximate outer dimensions (ND Needle Diameter and IL Insertion Length) of the needle that needs to be calibrated.

The plastic material is incorporated in a metal protection casing. A plug is provided for sealing purposes. In order to guarantee perfect contact between needle and reference material, the metal casing is filled with a fluid, glycerol. An additional hole is provided in order to be able to perform checks of material stability with thin needle probes.

The user is recommended to send the CRC to Hukx for a check of material stability every 5 years.