Shielding And Grounding; Potential Equalisation; Operating Controls And Display - IFM Electronic TW70xx Serie Bedienungsanleitung

6 Shielding and Grounding

6.1 Potential Equalisation

The infrared temperature sensor housing is connected to
the shielding via the cable connector!
Differences in ground potentials might cause an equalis-
ing current to flow between devices through a cable
shielded at both ends. In this case, be sure to install an
additional potential equalisation line.
To avoid an equalising current, the infrared temperature
sensor can be mounted electrically insulated. The shield-
ing must be connected to the plant's grounding.
If the infrared temperature sensor is installed
without an insulator and without potential equali-
sation, the interference voltage may not exceed
48V.

7 Operating controls and display

The IR temperature sensor TW70xx features a 2-digit
display, 3 control keys and 2 LEDs. During Run Mode,
the display indicates the measurement value as a per-
centage relating to the temperature span.
1
2
12
3
4
5