WIKA RTD User Manual

WIKA operating instructions RTD and TC, intrinsically safe designs
3345267.08 06/2011 GB/D
25
GB
For applications without transmitters (digital displays) that require Group II instruments
(potentially explosive gas atmospheres), the following temperature class classication and
ambient temperature ranges apply:
Temperature class Ambient temperature range (Ta)
T6 (-50) -40 … +80 °C
T5 (-50) -40 … +95 °C
T4, T3 (-50) -40 … +100 °C
See and observe the permissible ambient temperatures and surface temperatures for third-party
products from the relevant approvals and/or data sheets.
Example
For instruments tted with a DIH10 transmitter and digital display, for example, the following limit
for temperature class classication applies:
Temperature class Ambient temperature range (Ta)
T6 -40 … +60 °C
For applications that require Group II instruments (potentially explosive dust atmospheres), the
following surface temperatures and ambient temperature ranges apply:
Power Pi Ambient temperature range (Ta)
750 mW (-50) -40 … +40 °C
650 mW (-50) -40 … +70 °C
550 mW (-50) -40 … +100 °C
See and observe the permissible ambient temperatures and surface temperatures for third-party
products from the relevant approvals and/or data sheets.
The values in brackets apply to special designs. These sensors are manufactured using special
sealing compounds. Moreover, they are equipped with connection heads made of stainless steel
and cable glands for the low-temperature range.
These thermometers are suitable for temperature classes T6...T3 in accordance with the
approval certicate. This applies to instruments without built-in transmitters and/or digital
displays. Thermometers equipped with transmitters and/or digital displays are for use in
temperature classes T6...T4 and are marked accordingly. Using equipment for applications which
require a lower temperature class (e.g. T2) than the marked one is permissible. In doing so, it
must be ensured that the maximum ambient temperature for safe operation of the instrument is
not exceeded.
7. Information on mounting, operation in hazardous areas (Europe)

WIKA RTD Specifications

General

Brand	WIKA
Model	RTD
Category	Measuring Instruments
Language	English