Micropilot S FMR540 4 to 20 mA HART
Installation
Hauser
15
Measuring range
The usable measuring range depends on the size of the antenna, the reflectivity of the medium, the
mounting location and possible interference reflections. To achieve an optimised signal strength it
is recommended to use an antenna with as large as possible diameter (DN200(8") or DN250 (10")
parabolic antenna). The following tables describe the groups of media as well as the achievable
measuring range as a function of application and media group. If the dielectric constant of a medium
is unknown, it is recommended to assume media group B to ensure a reliable measurement.
The following table describes the media groups and the dielectric constant
ε
r.
Measuring range depending on sensor type and media group
!
Note!
For stilling well applications Micropilot S FMR532 is recommended (see TI00344F/00/EN).
Media group
DC (
ε
r)
Examples
A1
1.4 to 1.6
propane, butane
A2
1.6 to 1.9
non-conducting liquids, kerosene, jet fuels, gasoline, LPG
B
1.9 to 4
non-conducting liquids, e.g. gasline, diesel fuel, heavy oil, motor oil, asphalt,
bitumen, BTEX, residual fuel
C
4 to 10
e.g. concentrated acids, organic solvents, esters, aniline, alcohol, acetone, …
D
> 10
conducting liquids, e.g. aqueous solutions, dilute acids and alkalis
Media group
Horn antenna
without sensor extension
Parabolic antenna
without sensor extension
Measuring range
1)
1)
All values are based on reference conditions.
Measuring range
1)
A1
DC (
ε
r) = 1.4 to 1.6
Please contact your Hauser sales organization.
A2
DC (
ε
r) = 1.6 to 1.9
0.6 to 20 m
0.6 to 40 m
B
DC (
ε
r) = 1.9 to 4
0.6 to 20 m
0.6 to 40 m
C
DC (
ε
r) = 4 to 10
0.6 to 30 m
0.6 to 40 m
D
DC (
ε
r) > 10
0.6 to 30 m
0.6 to 40 m
Max. measuring range with
cudstody transfer approval
NMi: 23 m (75 ft)
PTB: 23 m (75 ft)
NMi: 26 m (85 ft)
PTB: 30 m (98 ft)
