Installing/mounting
4.1 Fundamental safety instructions
SITRANS VP300 with or without HART
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Operating Instructions, 03/2011, A5E01258666-03
WARNING
Exceeded maximum ambient or process media temperature
Danger of explosion in areas subject to explosion hazard.
If the maximum permissible ambient and process media temperatures are exceeded, the
temperature class of the device is no longer valid.
Make sure that the maximum permissible ambient and process media temperatures of
the device are not exceeded. Refer to the information in Chapter Technical data
CAUTION
Influencing the position detection
Problem in the process. The position detection can be influenced by external magnetic
fields or ferromagnetic parts. The position detection displayed on the device no longer
corresponds to the actual value.
Attach the positioner in such a way that the position detection cannot be influenced by
additional external magnetic fields or ferromagnetic parts.
For the non-initialized device, the position display shows you how the position detection
is influenced by an applied field. Move the interference source toward and away from
the positioner and observe the displayed position.
CAUTION
Unsuitable compressed air
Device damage. As a general rule, the positioner must only be operated with dry and clean
compressed air.
Use the customary water separators and filters. An additional dryer is required in
extreme cases.
Use dryers, especially if you operate the positioner at low ambient temperatures.
CAUTION
Prior to working on the control valve
Danger of injury.
Before starting work on the control valve, move it into the safety position.
Make sure that the control valve has reached the safety position.
If you only interrupt the pneumatic auxiliary power to the positioner, it may be the case
that the safety position is only reached following a certain delay.
