Heinrichs Messtechnik
Installation and Operation Manual PITe
Page 14 of 22
The measuring signal tapped at the electrodes amounts to only a few millivolts. Correct grounding of
the electromagnetic flow sensor is therefor essential for achieving exact measurement. The transmitter
requires a reference potential to evaluate the measured voltage on the electrodes. The metrological
grounding of the medium for PITe is achieved via the wetted part of the sensor tube.
7.2 Environmental conditions
7.2.1
Ambient temperature ranges
-20°C to +60°C, below 0°C the readability of the LCD becomes limited
7.2.2
Storage temperature
-20°C to +60°C
7.2.3
Climatic category
In accordance with IEC 654-1 Non weather-protected Class D locations exposed directly to open-air
climate
7.2.4
Ingress Protection
PITe sensor: IP65 (EN60529)
Caution:
Ingress protection IP65 can only be achieved if suitable and tightly secured cable
glands or conduits are used. If the cable glands are only tightened handtight, water may
leak or seep into the terminal compartment of the housing.
Danger:
Action must be taken if the window of the transmitter enclosure becomes fogged over or
discolored. This is a sure sign that moisture, water or product medium has seeped into
the terminal compartment of the housing, for example, through the cable sheath!
Warning:
Electromagnetic compatibility is only guaranteed if the electronic housing is sealed.
Leaving the enclosure open can lead to electromagnetic disturbances.
7.2.5
Shock resistance/vibration resistance
The meter should be protected against extreme shocks and vibrations larger than 1G, which may
cause damage to the sensor or transmitter.
7.2.6
Medium temperature and pressure
-20°C to +100°C, 16 bar up to 90°C, 14 bar up to 100°C
8 Commissioning
8.1 Installation of magnetic-inductive flowmeters
During the installation of the magnetic-inductive flow sensor the instructions and notes of the assembly
instructions and operating manuals have to be followed. The regulations guidelines of grounding,
potential equalization and company-internal grounding practices are also to be observed.
8.2 Potentials
The outputs of the UMF2 (B) transmitter are all electrically isolated from the auxiliary power, the
sensor circuit and from each other. The housing and the interference suppression filters of the power
supply are connected to PE.
