Thermocouple Specifications - Fluke Datapaq Food Tracker User Manual

R, S and T, each type being identified by its connector color. The standard
thermocouple probe for food industry use is type T, although in some
circumstances type K probes are used.

Thermocouple Specifications

Probe Cable Insulation
Type
T Mineral insulation
or PTFE
K Mineral insulation
or PTFE
Thermocouple Cables
The practical operating temperature of the thermocouple probes is limited by
the cable insulation material's temperature characteristics.
Insulation
Mineral insulation (MI)
PTFE
Mineral-insulated (MI) probes have an enclosed junction providing protection
against carbon and other aggressive atmospheres, and increased immunity to
electrical interference. The MI needle probes supplied by Datapaq have a sheath
of 316 stainless steel which provides superior protection at high temperature.
Mineral insulation can be used when probe cables may be in close proximity to
heating elements.
PTFE (polytetrafluoroethylene)-insulated probes are suitable for general-
purpose use at temperatures up to 260°C/500°F. PTFE is a robust, flexible, non-
stick material. This is the standard insulation for oven use, though it cannot be
used when probe cables may be close to heating elements, especially infra-red
types.
PTFE does not support combustion, but decomposes above 265°C producing
28
Hardware
Accuracy
±0.5°C/0.9°F or ±0.4%
at -40 to 350°C/-40 to 662°F
±1.1°C/2.0°F or ±0.4%
at 0–1,250°C/32–2,282°F
Upper Temperature Limit
800°C/1,472°F
260°C/500°F
WARNING
small amounts of toxic fumes.
Standard
BS EN 60584.1
Class 1
ANSI MC 96.1
Special Limits of Error
FOOD TR ACK ER