Endress+Hauser Micropilot S FMR540 User manual

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TI00412F/00/EN/14.13
71229234
Technical Information
Micropilot S FMR540
Level-Radar
Level transmitter for continuous and non-contact
precision level measurement
For custody transfer and inventory control
applications with NMi- and PTB-approvals.
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.
Typical areas of application are:
• The Micropilot S with parabolic antenna is excellently suited for free space
applications up to 40 m (131 ft).
• The Micropilot S with horn antenna is suitable for free space applications that
disallow the use of a parabolic antenna due to tank/nozzle geometry.
The FMR540 with a DN200 (8") or DN250 (10") parabolic antenna offers high beam
focussing of 4.4° or 3.3° respectively, and is therefore ideally suited to applications with
nozzles situated close to the tank wall. The FMR540 with DN100 (4") horn antenna is
designed for all small nozzles sizes.
Your benefits
• Accuracy: better than 1 mm (0.04 in).
• National approvals (NMi, PTB) for custody transfer.
• Easy integration into tank gauging systems via the Tank Side Monitor NRF590.
• Low-cost, easy installation via 4-wire cable with HART and 24 V DC (intrinsically
safe).
• Low cost, low weight universal flanges.
• Alignment device to compensate any flange inclination.
• Easy on-site operation via menu-driven alphanumeric display.
• Easy commissioning, documentation and maintenance/diagnostics via operating
software (FieldCare).
• HART communication.

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Performance characteristics
For accuracy data for devices suitable for custody transfer measurement in accordance with OIML
R85, see Ambient temperature range. oä22.
Reference operating
conditions
According to OIML R85:
• Temperature = -25 °C to +55 °C (-13 °F to +131 °F)
• Atmospheric pressure
• Relative humidity (air) = 60 % ±15 %
• Medium properties: e.g. medium with good reflectivity and calm surface.
• Tank diameter: signal beam hits the tank wall only at one side.
• No major interference reflections inside the signal beam.
Maximum measured error Absolute accuracy better than ±1 mm (0.04 in) (better than 1/16")
The Micropilot S versions for free space applications have a typical accuracy of <1.0 mm (2 sigma
value). Depending on national calibration regulations, the permitted errors after the device has
been installed on the tank are ±3 mm (0.12 in), (OIML, API)...
Resolution Digital 0.1 mm / analogue: 0.03 % of measuring range
Settling time Typical: 15 sec
Hysteresis 0.1 mm
Non-repeatability 0.1 mm
Reaction time The reaction time depends on the parameter settings (min. 1 s).
In case of fast level changes, the device needs the reaction time to indicate the new value.
Long-term drift The long-term drift is within the specified accuracy.
Influence of ambient
temperature
Current output (additional error, in reference to the span of 16 mA):
•Zero point (4 mA)
average TK: 0.025 %/10 K, max. 0.291 % over the entire temperature range -40 °C to +80 °C
(-40 °F to 176 °F)
•Span (20 mA)
average TK: 0.07 %/10 K, max. 0.824 % over the entire temperature range -40 °C to +80 °C
(-40 °F to 176 °F)
Proof of accuracy of custody
transfer versions
The degree of accuracy is confirmed by a calibration certificate that records the absolute and relative
error at 10 measuring points during the final test. A Laser Interferometer (Jenaer Messtechnik ZLM
500) with an absolute accuracy of 0.1 mm is used as a reference for free space measurements. In
addition, certificates confirming initial verification are available on request for all radar devices in the
FMR540 series.
Maximum fill speed By the first pass trough of measuring range: 100 mm/min., thereafter unlimited.
Software reliability The software used in the radar devices FMR540 fulfills the requirements of OIML R85. This
particularly includes:
• Cyclical testing of data consistency
• Non-volatile memory
• Segmented data storage
The radar devices Micropilot S continuously monitor the compliance with accuracy requirements for
custody transfer measurements according to OIML R85. If the accuracy cannot be maintained, a
specific alarm is generated on the local display and via the digital communication (oä34).

Micropilot S FMR540
14 Endress+Hauser
Inventory control versions All device versions can be delivered as "Inventory Control" versions with reduced accuracy (3 mm [0.12
in]) under reference conditions. No calibration certificate or type approval is supplied with these
versions. The "Inventory Control" versions are selected by specifying Version "R - Not selected; Inventory
control version" in the Product Configurator under "Weight + measure approval".

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Installation
Installation conditions
Installation instructions With a DN100 (4") horn, this antenna is suitable for free space applications up to a measuring distance
of 20 m/30 m (66 ft/98 ft), (depending on dielectric constant). With the narrow beam angle (8 deg),
this horn antenna is suitable for closer to tank wall application ("Beam angle", oä20). When
installing, it is essential that the horn extends below the nozzle ("Installation on tank", oä17). If
condensation occurs, try using the parabolic antenna, or contact your Endress+Hauser sales center.
The parabolic antenna offers the smallest beam angle (3.3 deg) for free space applications. It also
offers the longest possible measuring distance of 40 m (131 ft) (dielectric constant > 1.8). It is ideal
for applications close to the tank walls.
• Recommended distance (1) from tank wall to
center of nozzle:
minimum as specified in table, "Beam angle",
oä20.
• Not in the centre (3), interference can cause
signal loss.
• Not above the fill stream (4).
• It is recommended to use a weather protection
cover (2) in order to protect the transmitter
from direct sun or rain.
Assembly and disassembly is simply done by
means of a tension clamp ("Accessories",
oä38).
A0021541
1
234
Tank installations
• Avoid any installations (1), like limit switches,
temperature sensors, etc., inside the signal
beam ("Beam angle", oä20).
• It is essential that HiHi alarm is below the
blocking distance (BD) and the safety distance
(SD).
• Symmetrical installations (2), e.g. vacuum
rings, heating coils, baffles, etc., can also
interfere with the measurement.
• Metallic screens (3) mounted at an angle
disperse the radar signals and can therefore
reduce interference echoes.
For more information, please contact your
Endress+Hauser sales center.
A0020826
1
3
2
BD
SD

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16 Endress+Hauser
Optimisation options
• Antenna size: the bigger the antenna, the smaller the beam angle, the less interference echoes.
• Mapping: the measurement can be optimized by means of electronic suppression of interference
echoes.
• Antenna alignment: "Optimum mounting position", oä17.
• Stilling well: a stilling well can always be used to avoid interference. The FMR532 with planar
antenna is recommended for stilling wells with a diameter DN150 (6") and larger.
Measuring conditions • The measuring range begins, where the beam hits the tank bottom. Particularly with dish bottoms
or conical outlets the level cannot be detected below this point.
• Depending on its consistency, foam can either absorb microwaves or reflect them off its surface.
Measurement is possible under certain conditions.
• The smallest possible measuring range B(see Fig.) depends on the antenna version.
• Tank diameter and height should be at least dimensioned such that a reflection of the radar signal
on both sides of the tank can be avoided.
• In case of media with a low dielectric constant (groups A and B), the tank bottom can be visible
through the medium at low levels (low height C). Reduced accuracy has to be expected in this range.
If this is not acceptable, we recommend positioning the zero point at a distance C(see Fig.) above
the tank bottom in these applications.
• In principle, it is possible to measure up to the tip of the antenna with the FMR540. However, due to
corrosion and build-up, the end of the measuring range should not be any closer than A(see Fig.).
A0020737
Behaviour if measuring range is exceeded
The behaviour in case of the measuring range being exceeded can be freely set:
The default setting is a current of 22 mA and the generation of a digital warning (E651).
1)
1) All values are based on reference conditions.
A [m (ft)] B [m (ft)] C [mm (in)]
FMR540 (without extension)2)
2) The length of a sensor extension shall be added to "A" when selecting the extension option.
0.6 (2.0) > 0.5 (1.6) > 300 (11.8)
100%
0%
BA
C

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Installation on tank Optimum mounting position
A0020810
1 Marking on sensor
2Markingonflange
90°
90°
2
1
Standard installation with horn antenna
• Follow installation instructions (oä15).
• Marker must be aligned towards tank wall.
The marker is located clearly visible on the
sensor neck or the flange.
• After mounting, the housing can be turned 350°
in order to simplify access to the display and the
terminal compartment.
• Adjust vertical sensor alignment in case the
flange is not parallel to the face is medium
surface.
• The horn antenna should protrude from the
nozzle. If necessary, choose version with
antenna extension (oä23).
For applications with higher nozzles, please
contact your Endress+Hauser sales center.
• The horn antenna should be installed with 3°
inclination towards the tank center. To avoid
interference reflections or for optimum
alignment within the tank, the FMR540 with
optional alignment device can be swiveled by
15° in all directions.
For more information, please see Operating
Instructions KA00274F/00/EN.
If you have any questions regarding
commissioning, please contact your
Endress+Hauser sales center.
A0020809
H
øD
Antenna size 100 mm (4")
D (mm[in]) 95 (3.74)
H (mm [in])
(without antenna extension) < 430 (16.9)

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18 Endress+Hauser
Standard installation with parabolic antenna
• Follow installation instructions (oä15).
• Marker is aligned towards tank wall. The marker is located clearly visible on the sensor neck or the
flange.
• After mounting, the housing can be turned 350° in order to simplify access to the display and the
terminal compartment.
• Ideally, the parabolic antenna should extend completely out of the nozzle (A).
Particularly when using the alignment device, please ensure that the parabolic reflector is protruding
from the nozzle/roof so as not to inhibit alignment.
For applications with higher nozzles, install the parabolic antenna completely in the nozzle
(B), including RF waveguide.
• The parabolic antenna should be installed vertically. To avoid interference reflections or for optimum
alignment within the tank, the FMR540 with optional alignment device can be swiveled by 15° in all
directions. For more information, please see Operating Instructions KA00274F/00/EN.
If you have any questions regarding commissioning, please contact your Endress+Hauser sales
center.
A0020808
A Antenna is extending out of the nozzle
B Antenna installation in the nozzle
1 Installation perpendicular to surface of medium
aObservedistance
øD
H
AB
1
aa
Antenna size 200 mm (8") 250 mm (10")
D (mm [in]) 173 (6.81) 236 (9.29)
H (mm [in])
(without antenna extension) < 200 (7.87) < 200 (7.87)

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Alignment device Optimum mounting position
The Micropilot S should be installed at right angles to the surface of the medium for optimum
measuring performance of ±1 mm (0.04 in). Using the alignment device it is possible to tilt the
antenna axis by up to 15° in all directions. The alignment device is used for the optimum alignment of
the radar beam to the liquid surface.
The Sensor should be positioned vertical to the liquid surface in inclination of 0° for Parabolic Antenna
and up to 3° for Horn Antenna.
A0020807
AMedium
To align the antenna as precisely as possible, it is recommended to use the Level Tool, which is
available as an accessory. For more information, please see Operating Instructions KA00274F/00/EN.
In case of custody Application, the screws must be locked with wires.
±15°
±15°
90 °
90 °
A

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20 Endress+Hauser
Beam angle The beam angle is defined as the angle Dwhere the energy density of the radar waves reaches half the
value of the maximum energy density (3dB-width). Microwaves are also emitted outside the signal
beam and can be reflected off interfering installations. The beam diameter Wis a function of antenna
type (beam angle
D
) and distance D. The recommended distance to the tank wall is indicated in the
tables below. It is strongly recommended to avoid any mechanical obstacles within the highlighted
area.
HINWEIS
Measuring error due to multiple echoes!
 Ensure that only one tank wall (not two tank walls) is hit directly by the radar beam!
Horn antenna
A0020805
Antenna size 100 mm (4")
Beam angle (
D
)8°
Distance (D)
(m [ft])
Beam
diameter (W)
(m [ft])
Recommended distance to wall
(m [ft])
0° tilting 3° tilting
5 (16) 0.70 (2.3) 0.89 (2.9) 0.62 (2.0)
10 (33) 1.40 (4.6) 1.77 (5.8) 1.23 (4.0)
15 (49) 2.10 (6.9) 2.65 (8.7) 1.85 (6.1)
20 (66) 2.80 (9.2) 3.53 (12) 2.46 (8.1)
25 (82) 3.50 (11) 4.41 (14) 3.07 (10)
30 (98) 4.20 (14) 5.29 (17) 3.69 (12)
Parabolic antenna
A0020806
Antenna size 200 mm (8") 250 mm (10")
Beam angle (
D
)4.4° 3.3°
Distance (D)
(m [ft])
Recommended distance to wall
(m [ft])
5 (16) 0.35 (1.1) 0.2 (0.7)
10 (33) 0.70 (2.3) 0.5 (1.6)
15 (49) 1.05 (3.4) 0.75 (2.5)
20 (66) 1.40 (4.6) 1.05 (3.4)
25 (82) 1.75 (5.7) 1.3 (4.3)
30 (98) 2.10 (6.9) 1.6 (5.2)
35 (115) 2.45 (8.0) 1.85 (6.1)
40 (131) 2.80 (9.2) 2.10 (6.9)
D
W
a
D
W
a

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Integrated air purge
connection
In some applications, the integrated purge air
connection can prevent clogging of the antenna.
• Permanent operation:
recommended pressure range for purge air: 1.2
to 1.5 bar (18 to 22.5 psi) abs.
• Pulsed operation:
max. pressure of purge air: 6 bar (90 psi) abs.
HINWEIS
Moisture or humidity can accumulate and
result in incorrect measurement results!
 Use dry purge air!
A0020799
1 Purge air connection G 3/4"
(max. torque 3.5 Nm (2.581 lbf ft)
MadeinGermanyMaulburg
IP 65
Messbereich
Measuringrange
U16...36VDC
4...20mA
max.20 m
T>7
0°C:
At>85°C
OrderCode:
Ser.-No.:
OrderCode:
Ser.-No.:
SS+HAUSER
OPILOT FMR
1