Endress+Hauser easytemp TSM 470 F, Operating Instructions Manual, Page: 4 / 28

Safety notes Compact RTD transmitter
4 Hauser
1 Safety notes
Safe and secure operation of the compact RTD transmitter can only be guaranteed if
the operating instructions and all safety notes are read, understood and followed.
1.1 Designated use
•
The unit is a universal, presettable compact RTD temperature transmitter include
resistance thermometer (RTD).
•
The manufacturer cannot be held responsible for damage caused by misuse of the
unit.
1.2 Installation, commissioning and operation
The unit is constructed using the most up-to-date production equipment and complies
to the safety requirements of the local guidelines. The compact RTD transmitter is fully
factory tested according to the specifications indicated on the order. However, if it is
installed incorrectly or is misused, certain application dangers can occur. Installation,
wiring and maintenance of the unit must only be done by trained, skilled personnel who
are authorized to do so by the plant operator. This skilled staff must have read and
understood these instructions and must follow them to the letter. The plant operator
must make sure that the measurement system has been correctly wired to the
connection schematics.
Electrical temperature sensors such as RTD's produce low-level signals proportional to
their sensed temperature. The compact RTD transmitter converts the low-level sensor
signal to a standard 4 to 20 mA DC signal that is relatively insensitive to lead length and
electrical noise. This current signal is then transmitted to the control room via two wires.
The transmitter electronics module is permanently sealed within the housing, resisting
moisture and corrosive damage. Verify that the operating atmosphere of the compact
RTD transmitter is consistent with the appropriate hazardous locations certifications.
#
Warning!
Electrical shock could cause death or serious injury. If the compact RTD transmitter is
installed in a high voltage environment and a fault or installation error occurs, high
voltage may be present on the M12 plug-in micro-connector and / or the body.
Temperature Effects
The transmitter will operate within specifications for ambient temperatures between -40
and 185 °F (-40 and 85 °C). Heat from the process is transferred from the thermowell to
the transmitter housing. If the expected process temperature is near or beyond
specification limits, consider the use of additional thermowell lagging, and extension
nipple, or a remote mounting configuration to isolate the transmitter from the process.