Safety notes
TMT180
4
Hauser
1
Safety notes
Safe and secure operation of the head 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 temperature head transmitter for resistance thermometer
(RTD). The unit is constructed for mounting in a connection head (DIN form B) or field housing.
• 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 temperature 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 temperature 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 transmitter is consistent with the
appropriate hazardous locations certifications.
#
Warning!
Electrical shock could cause death or serious injury. If the sensor is installed in a high voltage
environment and a fault or installation error occurs, high voltage may be present on the transmitter
leads and terminals.
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.