Installation Instructions

Micropilot FMR20 Modbus RS485
Endress+Hauser 15
Position for installation on a tank
A
BD
D
A0028410
 11 Installation position on a tank
• If possible install the sensor so that its lower edge projects into the tank.
• Recommended distance A wall - nozzle outer edge: ~ ¹⁄₆ of the tank diameter D. Under no
circumstances should the device be mounted closer than 15 cm (5.91 in) to the tank wall.
• Do not install the sensor in the middle of the tank.
• Avoid measurements through the filling curtain.
• Avoid equipment such as limit switches, temperature sensors, baffles, heating coils etc.
• Multiple devices can be operated in one tank without influencing each other.
• No signals are evaluated within the Blocking distance (BD). It can therefore be used to suppress
interference signals (e.g. the effects of condensate) in the vicinity of the antenna.
An automatic Blocking distance of at least 0.1 m (0.33 ft) is configured as standard. However, this
can be overwritten manually (0 m (0 ft) is also permitted).
Automatic calculation:
Blocking distance = Empty calibration - Full calibration - 0.2 m (0.656 ft).
Each time a new entry is made in the Empty calibration parameter or Full calibration parameter,
the Blocking distance parameter is recalculated automatically using this formula.
If the result of the calculation is a value < 0.1 m (0.33 ft), the Blocking distance of 0.1 m (0.33 ft)
will continue to be used.
Nozzle installation
The antenna should be located out of the nozzle for optimum measurement. The interior of the
nozzle must be smooth and may not contain any edges or welded joints. The edge of the nozzle
should be rounded if possible.
BA
L
D
L
D
L
D
L
D
A0028413
 12 Nozzle installation
A 80 mm (3 in) antenna
B 40 mm (1.5 in) antenna