Commissioning, Operation - WIKA TR21-A Manual De Instrucciones

6. Commissioning, operation

6. Commissioning, operation
When using a thermowell additionally observe the information of the attached
thermowell operating instructions.
WARNING!
Avoid putting any mechanical loading on the electrical connections and on the
enclosures. Connections must only be opened once the instrument has been
depressurised and has cooled down.
Maximum permissible temperatures:
Without neck tube: -50 ... +150 °C (-58 ... +302 °F)
■
With neck tube: -50 ... +250 °C (-58 ... +482 °F)
■
At the case with transmitter: 85 °C (185 °F)
■
Temperature at the connector: max. 85 °C (185 °F)
■
6.1 Mounting
The connection dimensions of the thermowell must match those of the counterpart on the
process side. Insert the thermowell into the process adapter without forcing or damaging it.
For sealing, choose appropriate seals. (further information for mounting the thermowell see
enclosed operating instructions for thermowells)
For installation, the appropriate fastenings, such as screws and nuts, must be used and
mounted using the appropriate mounting torques and tools (e.g. open-ended spanner). The
seals installed must be checked regularly that they are functioning correctly.
The corresponding parts on the process side, the seals and the sealing rings are not
included in the scope of delivery.
The insertion length, along with the flow velocity and viscosity of the process media, may
reduce the max. loading on the thermowell.
The case must be grounded against electromagnetic fields and electrostatic discharge. It is
not necessary to connect the case separately to the equipotential bonding system, provided
that it has a fixed and secure contact to the metallic vessel, its components or pipes, and
that these are connected to the equipotential bonding system.
When there is a non-metallic contact with the vessel, or with its structural components or
piping, the instrument must be provided with equipotential bonding.
WIKA operating instructions model TR21
EN
15