Safety; Intended Use - WIKA TR21-A Manual De Instrucciones

1. General information / 2. Safety
Information
... points out useful tips, recommendations and information for efficient and
trouble-free operation.
DANGER!
... identifies hazards caused by electric power. Should the safety instructions
not be observed, there is a risk of serious or fatal injury.
WARNING!
... indicates a potentially dangerous situation that can result in burns, caused
by hot surfaces or liquids, if not avoided.
Abbreviations
2-wire The lead resistance is recorded as an error in the measurement.
3-wire With a cable length of 30 m or longer, measuring errors can occur.
4-wire The lead resistance can be ignored.

2. Safety

WARNING!
Before installation, commissioning and operation, ensure that the appropriate
miniature resistance thermometer has been selected in terms of measuring
range, design, specific measuring conditions and appropriate wetted-parts
materials (corrosion). Non-observance can result in serious injury and/or
damage to the equipment.
Depending on the type of application, the electrical connection must be
protected against mechanical damage.
Further important safety instructions can be found in the individual chapters of
these operating instructions.

2.1 Intended use

The model TR21 resistance thermometer has been specifically designed for the
measurement of temperatures in vessels or pipes, in the range of -50 ... +150 °C
(-58 ... + 302 °F) or -50 ... +250 °C (-58 ... +482 °F), which are used in sanitary applications.
Here, the thermowell is used to protect the temperature sensor from the process conditions.
Furthermore, the detachable connection from the thermowell in the TR21-A and TR21-B
variants enables the removal of the temperature sensor without having to shut down the
WIKA operating instructions model TR21
EN
5