Siemens 3RS2 Manual page 42

Digital devices
5.10 Operator control
• UNIT: Setting of the measurement unit
– °C (default setting)
– °F
– mA (only when using the 4 ... 20 mA analog input on the sensor expansion module)
– % (only when using the 4 ... 20 mA analog input on the sensor expansion module)
• ECO MODE: Activation/deactivation of the energy-saving mode: The display brightness is
reduced after a certain time
– on (default setting)
– off
• PIN: Password protection to protect the device from unauthorized parameter changes
(default value: 000); change this default value to achieve the protective effect
– use (use password protection): on, off (default setting)
– rst (password reset): oldPIN → newPIN
• CALIBR: Zero point calibration through input of an offset:
– -99 °C ... +99 °C (default setting: 0 °C)
– -99 °F ... +99 °F
– -10 mA ... +10 mA
The offset can be set separately for each active input
When using thermocouples you can select an internal reference integrated in the device or
an external reference.
If the internal reference is selected, the comparison measurement of the cold end of the
thermocouple ("cold junction") takes place in the device. When the external reference is
selected, the cold junction of the thermocouple is assumed to be located outside the device.
The comparison temperature can be set manually on the device in this case. It must be noted
that a discrepancy between the actual temperature at the cold junction of the thermocouple
and the manually selected reference temperature can impair the temperature measurement
in this situation. This means the cold junction of the thermocouple must be at a constant
temperature (e.g. in the laboratory or similar).
– -25 °C ... +80 °C; -13 °F ... +176 °F (default setting: 0 °C)
• CONTRAST: Setting of the display contrast: -10 ... +10 (default setting: 0)
• FAC.RST: Resetting the device and the PIN to the factory default settings
– Yes
– No
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3RS2 temperature monitoring relay
Equipment Manual, 02/2022, A5E42462552002A/RS-AB/002