Micropilot S FMR540 4 to 20 mA HART
Technical data
Hauser
69
10
Technical data
10.1
Additional technical data
10.1.1
Application
The Micropilot S is used for highly accurate level measurement in storage tanks and can be applied
in custody transfer applications. It meets the relevant requirements according to OIML R85 and
API 3.1B. The FMR540 with
• parabolic antenna is excellently suited for free space applications up to 40 m (131 ft).
• horn antenna is suitable for free space applications that disallow the use of a parabolic antenna
due to tank/nozzle geometry.
10.1.2
Input
Measured variable
The measured variable is the distance between a reference point and a reflective surface (i.e.
medium surface). The level is calculated based on the tank height entered.
The level can be converted into other units (volume, mass) by means of a linearization.
10.1.3
Output
Output signal
4 to 20 mA (invertible) with HART protocol
Signal on alarm
Error information can be accessed via the following interfaces:
• Local display:
– Plain text display
• Current output
• Digital interface
Linearization
The linearization function of the Micropilot S allows the conversion of the measured value into any
unit of length or volume. Linearization tables for calculating the volume in cylindrical tanks are pre-
programmed. Other tables of up to 32 value pairs can be entered manually or semi-automatically.
10.1.4
Auxiliary energy
Residual ripple HART
47 to 125 Hz: U
pp
= 200 mV
Max. noise HART
500 Hz to 10 kHz: Ueff = 19 mV (at 500
Ω
)
