Safety Notes; Designated Use; Installation, Commissioning And Operation - Endress+Hauser iTEMP HART TMT162 Bedienungsanleitung

Safety notes

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1 Safety notes
Safe and secure operation of the field 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 field transmitter for resistance
temperature detectors (RTD), thermocouple (TC) as well as resistance and voltage sensors.
The unit is constructed for mounting in field applications.
• The manufacturer cannot be held responsible for damage caused by misuse of the unit.
• Separate Ex documentation is part of this operating manual, for measurement systems in
hazardous areas. The installation conditions and connection values indicated in these
instructions must be followed!
1.2

Installation, commissioning and operation

The unit is constructed using the most up-to-date production equipment and complies with
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 and thermocouples 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 can be commissioned before or after installation. It may be useful to
commission it on the bench, before installation, to ensure proper operation and to become
familiar with its functionality. Make sure the instruments in the loop are installed in
accordance with intrinsically safe or non-incendive field wiring practices before connecting
®
a HART communicator in an explosive atmosphere.
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
‣
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.
For more details and download see:
www.endress.com
Temperature Effects
The transmitter will operate within specifications for ambient temperatures between -40
and
+185 °F (-40 and +85 °C) without display. 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.
TMT162
Endress+Hauser