Deltabar S FMD77, FMD78, PMD75 with FOUNDATION Fieldbus
Installation
Hauser
21
4.3.4
Installation instructions for devices with diaphragm seals
(FMD78)
• Please note that the hydrostatic pressure of the liquid columns in the capillaries can cause
zero point shift. The zero point shift can be corrected.
• Do not clean or touch the process isolating diaphragm of the diaphragm seal with hard or
pointed objects.
• Do not remove process isolating diaphragm protection until shortly before installation.
NOTICE
Improper handling!
Damage to the device!
‣
A diaphragm seal and the pressure transmitter together form a closed, oil-filled
calibrated system. The fill fluid hole is sealed and may not be opened.
‣
When using a mounting bracket, sufficient strain relief must be ensured for the
capillaries in order to prevent the capillary bending down (bending radius
100
(3.94 in)).
‣
Please observe the application limits of the diaphragm seal filling oil as detailed in the
Technical Information for Deltabar S TI00382P, "Planning instructions for diaphragm
seal systems" section.
NOTICE
In order to obtain more precise measurement results and to avoid a defect in the device,
mount the capillaries as follows:
‣
Vibration-free (in order to avoid additional pressure fluctuations)
‣
Not in the vicinity of heating or cooling lines
‣
Insulate if the ambient temperature is below or above the reference temperature
‣
With a bending radius of
100 mm (3.94 in).
‣
Do not use the capillaries as a carrying aid for the diaphragm seals!
‣
The ambient temperature and length of both capillaries should be the same when using
two-sided diaphragm seal systems.
‣
Two diaphragm seals which are the same (e.g. with regard to diameter, material, etc.)
should always be used for the negative and positive side (standard delivery).
P01-FMD78xxx-11-xx-xx-xx-005
Fig. 19:
Mounting Deltabar S, FMD78 with diaphragm seals and capillaries, recommended mounting for vacuum applications:
mount pressure transmitter below the lowest diaphragm seal!
+ –
+
–
≥
100 mm
Содержание Deltabar S FMD77
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