SONAPHONE
®
E
Operating Manual – Revision: 2.4 | 2020-11-17
Page 50 of 66
7.2 Surface temperature sensor
In general, temperatures in the range of 0 °C ... 800 °C can be measured.
In explosive atmospheres, maximum temperatures of up to 450 °C will
occur.
The surface temperature sensor can either be plugged into the
SONAPHONE
®
E directly or by using the extension cable.
If no temperature sensor is plugged in, (---) will be shown on the display.
Note!
Before measuring, make sure that the temperature of the
SONAPHONE
®
E has adapted to the ambient temperature, as
temperature measurement with a thermocouple is a comparative
measuring method. The temperature difference between the
measuring and reference junction (probe tip) is determined. The
reference junction is the SONAPHONE
®
E.