Endress+Hauser Deltapilot M FMB50 - Supplementary Installation Instructions; Wall and Pipe Mounting

Deltapilot M FMB50/51/52/53
24 Endress+Hauser
Supplementary installation
instructions
Process isolating diaphragm
• Do not clean or touch process isolating diaphragms with hard or pointed objects.
• The process isolating diaphragm in the rod and cable version is protected against mechanical damage by a
plastic cap.
Seal
• Deltapilot M devices with a G 1 1/2 thread:
When screwing the device into the tank, the flat seal has to be positioned on the sealing surface of the process
connection. To avoid additional strain on the process isolating diaphragm, the thread should never be sealed
with hemp or similar materials.
• Deltapilot M devices with NPT threads:
– Wrap Teflon tape around the thread to seal it.
– Tighten the device at the hexagonal bolt only. Do not turn the device at the housing.
– Do not overtighten the thread when screwing in the screw. Max. torque: 20 to 30 Nm
(14.75 to 22.13 lbf ft)
Sealing the probe housing
Moisture must not penetrate the housing when mounting the device, establishing the electrical connection and
during operation.
• Always firmly tighten the housing cover and the cable entries.
• Lubricant is provided on the O-ring seal in the housing cover and on the thread of the aluminum cover. To
ensure that the cover seals tight, any lubricant which has been removed must be replaced. Use silicone
grease or graphite paste as the lubricant. Mineral oil-based grease can destroy the O-ring.
PE cable length > 300 m (984 ft)
• Two suspension clamps must be used for PE cables longer than 300 meters (984 ft).
Cable length tollerances
•FMB52
– Cable length < 5 m (16 ft): up to -35 mm (-1.38 in)
– Cable length 5...10 m (16...33 ft): up to -75 mm (-2.95 in)
– Cable length 10...100 m (33...328 ft): up to -100 mm (-3.94 in)
•FMB53
– Cable length < 5 m (16 ft): up to ±17.5 mm (±0.69 in)
– Cable length 5...10 m (16...33 ft): up to ±37.5 mm (±1.48 in)
– Cable length 10...100 m (33...328 ft): up to ±50 mm (±1.97 in)
Rod length tollerances
•FMB51
– Rod length < 4000 mm (157 in): up to -4 mm (-0,16 in)
Wall and pipe mounting For installing the device on pipes or walls, Endress+Hauser provides a mounting bracket which is included in
the scope of supply or can be ordered as a separate accessory (part no. 71102216).
For the dimensions, see → ä 39.