Device Check; Determining A Location - Siemens SITRANS F Operating Instructions Manual

Installing/Mounting

4.2 Device check

4.2 Device check
Prior to installation check the functionality of the device:
● Remove the transport protection from the fitting.
● Verify the free mobility of the float.
4.3

Determining a location

Ensure that there is sufficient clearance to magnet-influencing parts, such as for example
solenoid valves and ferromagnetic components, e.g. steel brackets/structures.
Clearance between adjacently mounted devices
Observe at least 300 mm (11.8") as the lateral clearance between 2 adjacently mounted
instruments.
The instruments can be mounted staggered by the length of one instrument at reduced
clearance.
Clearance to influencing steel parts
The lateral clearance to influencing steel parts must constitute at least 200 mm. In case of
doubt the influence can be tested by moving the instrument up and down approximately
200 mm (7.87") at a selected clearance and verifying whether the position of the pointer in
the display changes.
Inlet / outlet conditions
● Inlet and outlet pluggings in front of and behind the instrument are usually unnecessary in
● Avoid installation of unilaterally constricting fittings in front of the instrument.
● As a rule, interference-free inlet and outlet tracks are not required. In the case of highly
● The nominal width of the pipe to be connected must correspond to the nominal width of
● For gases, valves must be installed in the outlet of the measuring device.
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– The float must slide smoothly in the pipe without canting or deadlocking.
– The pointer must smoothly follow the movement of the float.
– In the idle state (no flow) the pointer must be at the marked reference point (first line
on the scale).
– At the end position of the float the pointer must be above the final value of the scale.
the case of linear flow profile of the medium.
asymmetric flow profiles, however, additional measures (e.g. inlet tracks, flow rectifiers)
could be expedient for the attainment of measuring accuracy.
If this is absolutely necessary, at least the length of the instrument = 250 mm (9.84")
should be designed as the inlet track.
the measuring instrument.
Operating Instructions, 02/2013, A5E03821131-01
SITRANS FVA250