Endress+Hauser Micropilot S FMR531 User manual

BA207F/00/en/04.09
71093754
Valid as of software version
V 01.03.00 (amplifier)
V 01.03.00 (communication)
Operating Instructions
Micropilot S FMR531
Level-Radar
HART/4...20 mA
6

Brief overview Micropilot S FMR531 with HART/4...20 mA
2Endress + Hauser
Brief overview
For quick and simple commissioning:
Safety Instructions →Page 6 ff.
Explanation of the warning symbols
You can find special instructions at the appropriate position in the chapter in
question. The positions are indicated with the icons Warning #, Caution "and
Note!.
Æ
Installation →Page 12 ff.
The steps for installing the device and installation conditions (e.g. dimensions)
can be found here.
Æ
Wiring →Page 24 ff.
The device is virtually completely wired on delivery.
Æ
Display and Operating Elements →Page 32 ff.
An overview of the position of the display and operating elements can be found
here.
Æ
Commissioning via Display VU331 →Page 43 ff.
In the "Commissioning" section, you learn how to switch on the device and
check the functioning.
Æ
Commissioning via Operating Software FieldCare →Page 61 ff.
In the "Commissioning" section, you learn how to switch on the device and
check the functioning.
Additional information on the operation of FieldCare can be found in the
operating instructions BA217F/00.
Æ
Fault Tracking / Trouble Shooting →Page 70 ff.
If faults occur during operation, use the checklist to localise the cause.
Here you can find measures you can take yourself to take remedial action
against the fault.
Æ
Index →Page 96 ff.
You can find important terms and keywords on the individual sections here.
Use the keyword index to find quickly and efficiently the information you need.

Micropilot S FMR531 with HART/4...20 mA Brief overview
Endress + Hauser 3
Brief operating instructions
L00-FMR53xxx-19-00-00-en-013
!Note!
This operating manual explains the installation and initial start-up for the level transmitter
measuring device. All functions that are required for a typical measuring task are taken into account
here.
In addition, the Micropilot S provides many other functions that are not included in this operating
manual, such as optimising the measuring point and converting the measured values.
An overview of all device functions can be found on page 88.
An extensive description of all device functions can be found in BA217F - "Description of the
instrument functions" on the enclosed CD-ROM.
Operating Instructions can also be found on our homepage: www.endress.com
E
+
-
+
E
+
-
F
L
D
E
E
E
-
… …
… …
KA 161F/00/a2/12.01
52006294
52006294
- flat
ceiling
- stilling
well
…
- unknown
- <1.9
- 1.9 … 4
- 4 … 10
- >10
- standard
- calm
surface
- add. agitator
…
input E
(see sketch) input F (see sketch) only for
bypass +
stilling well
- ok
- too small
- too big
- unknown
- manual
displayed
(see sketch)
D and L are confirm
or specify
range
suggestion
000
measured value
Group
selection
00
basic setup
01
safety settings
03
mounting
calibr.
09
display
04
linearisation
05
extended calibr.
06
output
0C
system
parameters
092
language
0A
diagnostics
0A0
present
error
002
tank
shape
004
process
cond.
005
empty
calibr.
006
full
calibr.
007
pipe
diameter
008
dist./
meas value
009
history
reset
051
check
distance
003
medium
property
052
range of
mapping
053
start
mapping
008
dist./
meas value
flange:
referencepoint
ofmeasurement
- envel. curve
- incl. FAC
- incl. cust. map
- single curve
- cyclic
= 100: unlocked
100: locked≠
09A
plot settings
09B
recording
curve
0A1
previous
error
0A4
unlock
parameter
- dip table
- auto correct.
030
tank
gauging
033
dip table
mode
034/035
dip table
555 = History Reset
(333 = reset customer parameters)
0A3
reset
basic setup
dip table offsetfirst point corrects
further points correct linearity
history reset (= 555)
Contrast: +or +
Micropilot S - Quick Setup

Brief overview Micropilot S FMR531 with HART/4...20 mA
4Endress + Hauser

Micropilot S FMR531 with HART/4...20 mA Table of Contents
Endress + Hauser 5
Table of Contents
1 Safety instructions . . . . . . . . . . . . . . . . 6
1.1 Designated use . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Installation, commissioning and operation . . . . . . . . 6
1.3 Operational safety . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4 Notes on safety conventions and symbols . . . . . . . . . 7
2 Identification . . . . . . . . . . . . . . . . . . . . 8
2.1 Device designation . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3 Certificates and approvals . . . . . . . . . . . . . . . . . . . 11
2.4 Registered trademarks . . . . . . . . . . . . . . . . . . . . . . 11
3 Mounting . . . . . . . . . . . . . . . . . . . . . . 12
3.1 Quick installation guide . . . . . . . . . . . . . . . . . . . . . 12
3.2 Incoming acceptance, transport, storage . . . . . . . . . 13
3.3 Installation Conditions . . . . . . . . . . . . . . . . . . . . . . 14
3.4 Installation instructions . . . . . . . . . . . . . . . . . . . . . 20
3.5 Post-installation check . . . . . . . . . . . . . . . . . . . . . . 23
4 Wiring . . . . . . . . . . . . . . . . . . . . . . . . 24
4.1 Quick wiring guide . . . . . . . . . . . . . . . . . . . . . . . . 24
4.2 Connecting the measuring unit . . . . . . . . . . . . . . . 26
4.3 Recommended connection . . . . . . . . . . . . . . . . . . 29
4.4 Degree of protection . . . . . . . . . . . . . . . . . . . . . . . 29
4.5 Post-connection check . . . . . . . . . . . . . . . . . . . . . . 29
5 Operation . . . . . . . . . . . . . . . . . . . . . . 30
5.1 Quick operation guide . . . . . . . . . . . . . . . . . . . . . . 30
5.2 Display and operating elements . . . . . . . . . . . . . . . 32
5.3 Local operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.4 Display and acknowledging error messages . . . . . . 38
5.5 HART communication . . . . . . . . . . . . . . . . . . . . . . 39
6 Commissioning. . . . . . . . . . . . . . . . . . 40
6.1 Function check . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.2 Switching on the measuring device . . . . . . . . . . . . 40
6.3 Basic Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6.4 Basic Setup with the VU331 . . . . . . . . . . . . . . . . . 43
6.5 Mounting calibration with VU331 . . . . . . . . . . . . . 51
6.6 Basic Setup with FieldCare . . . . . . . . . . . . . . . . . . 61
6.7 Mounting calibration with FieldCare . . . . . . . . . . . 65
7 Maintenance. . . . . . . . . . . . . . . . . . . . 67
8 Accessories. . . . . . . . . . . . . . . . . . . . . 68
9 Trouble-shooting . . . . . . . . . . . . . . . . 70
9.1 Trouble-shooting instructions . . . . . . . . . . . . . . . . 70
9.2 System error messages . . . . . . . . . . . . . . . . . . . . . . 71
9.3 Application errors . . . . . . . . . . . . . . . . . . . . . . . . . 73
9.4 Orientation of the Micropilot . . . . . . . . . . . . . . . . . 75
9.5 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
9.6 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
9.7 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
9.8 Software history . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
9.9 Contact addresses of Endress+Hauser . . . . . . . . . . . 81
10 Technical data . . . . . . . . . . . . . . . . . . . 82
10.1 Additional technical data . . . . . . . . . . . . . . . . . . . . 82
11 Appendix. . . . . . . . . . . . . . . . . . . . . . . 88
11.1 Operating menu HART (Display modul), FieldCare . 88
11.2 Description of functions . . . . . . . . . . . . . . . . . . . . . 90
11.3 Function and system design . . . . . . . . . . . . . . . . . . 90
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Safety instructions Micropilot S FMR531 with HART/4...20 mA
6Endress + Hauser
1 Safety instructions
1.1 Designated use
The Micropilot S FMR531 is a compact radar level transmitter for the continuous, contactless
measurement of liquids. The device can also be freely mounted outside closed metal vessels because
of its operating frequency of about 6 GHz and a maximum radiated pulsed energy of 1mW (average
power output 1 μW). Operation is completely harmless to humans and animals.
1.2 Installation, commissioning and operation
The Micropilot S has been designed to operate safely in accordance with current technical, safety
and EU standards. If installed incorrectly or used for applications for which it is not intended,
however, it is possible that application-related dangers may arise, e.g. product overflow due to
incorrect installation or calibration. For this reason, the instrument must be installed, connected,
operated and maintained according to the instructions in this manual: personnel must be authorised
and suitably qualified. The manual must have been read and understood, and the instructions
followed. Modifications and repairs to the device are permissible only when they are expressly
approved in the manual.
1.3 Operational safety
Hazardous areas
Measuring systems for use in hazardous environments are accompanied by separate "Ex
documentation", which is an integral part of this Operating Manual. Strict compliance with the
installation instructions and ratings as stated in this supplementary documentation is mandatory.
• Ensure that all personnel are suitably qualified.
• Observe the specifications in the certificate as well as national and local regulations.
FCC-approval
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
"Caution!
Changes or modifications not expressly approved by the part responsible for compliance could void
the user’s authority to operate the equipment.

Micropilot S FMR531 with HART/4...20 mA Safety instructions
Endress + Hauser 7
1.4 Notes on safety conventions and symbols
In order to highlight safety-relevant or alternative operating procedures in the manual, the following
conventions have been used, each indicated by a corresponding symbol in the margin.
Safety conventions
#Warning!
A warning highlights actions or procedures which, if not performed correctly, will lead to personal
injury, a safety hazard or destruction of the instrument
"Caution!
Caution highlights actions or procedures which, if not performed correctly, may lead to personal
injury or incorrect functioning of the instrument
!Note!
A note highlights actions or procedures which, if not performed correctly, may indirectly affect
operation or may lead to an instrument response which is not planned
Explosion protection
0Device certified for use in explosion hazardous area
If the device has this symbol embossed on its name plate it can be installed in an explosion hazardous
area
-Explosion hazardous area
Symbol used in drawings to indicate explosion hazardous areas. Devices located in and wiring
entering areas with the designation “explosion hazardous areas” must conform with the stated type
of protection.
.Safe area (non-explosion hazardous area)
Symbol used in drawings to indicate, if necessary, non-explosion hazardous areas. Devices located in
safe areas still require a certificate if their outputs run into explosion hazardous areas
Electrical symbols
%Direct voltage
A terminal to which or from which a direct current or voltage may be applied or supplied
&Alternating voltage
A terminal to which or from which an alternating (sine-wave) current or voltage may be applied or
supplied
)Grounded terminal
A grounded terminal, which as far as the operator is concerned, is already grounded by means of an
earth grounding system
*Protective grounding (earth) terminal
A terminal which must be connected to earth ground prior to making any other connection to the
equipment
+Equipotential connection (earth bonding)
A connection made to the plant grounding system which may be of type e.g. neutral star or
equipotential line according to national or company practice
Temperature resistance of the connection cables
States, that the connection cables must be resistant to a temperature of at least 85 °C.
t >85°C

Identification Micropilot S FMR531 with HART/4...20 mA
8Endress + Hauser
2 Identification
2.1 Device designation
2.1.1 Nameplate
The following technical data are given on the instrument nameplate:
L00-FMR53xxx-18-00-00-en-003
Fig. 1: Information on the nameplate of the Micropilot S FMR531 (example)
L00-FMR53xxx-18-00-00-en-004
Fig. 2: Information on the NMi type plate for custody transfer applications of the
Micropilot S FMR531 (example)
L00-FMR53xxx-18-00-00-en-005
Fig. 3: Information on the PTB type plate for custody transfer applications of the
Micropilot S FMR531 (example)
ENDRESS+HAUSER
Ser.-No.:
Order Code:
MICROPILOT S
U: 16...30 VDC
TA > 70°C:
4...20 mA / 16...30 VDC
Dat./Insp.:
D00676-F
x=if modification
see sep. label
0032
0560
Made in Germany 79689 Maulburg
PN max.
T
Antenne max. °C
Messbereich
Anschlusswerte u.Temp.-Klasse siehe/
Connection values and temp.-classific.see
Measuring range max.
t >85°C
XXXXXXXXXXX
XXXXXX
PTB 00 ATEX
II1/2 G EEx ia IIC T6...T3
Order No
(see Order Information)
Registration No
ATEX
Safety information
max. measuring range
in tank Degree of protection
measuring range
max permissible
temperature
on the antenna
ENDRESS+HAUSER
MICROPILOT S FMR
Hersteller / Producer :
Zert.Messbereich/Cert.Measuring range
Umgeb./Environm.
bis
to min max
von
from
Baujahr
Year of constr.
Zertifikat-Nr.
Certification no.
T
m°C
D00748-C
Tank-Nr.
Tank-no.
Tankreferenzhöhe
Tank reference height m
T7480
Certification no
Certificated
Measuring range from ... to ... min. environment temperature max. environment temperature
Year of construction Tank reference height Tank-no.
ENDRESS+HAUSER
MICROPILOT S FMR
Hersteller / Producer :
Tank-Nr.
Tank-no.
Baujahr
Year of constr.
Tankreferenzhöhe
Tank reference height
m
D00549-B
Zert.Messbereich/Cert.Measuring range
Umgeb./Environm.
bis
to min max
von
from
T
m°C
4.413
01.06
Certificated
Measuring range from ... to ... min. environment temperature max. environment temperature
Year of construction Tank reference height Tank-no.
Approval number
Year and month
of type approval

Micropilot S FMR531 with HART/4...20 mA Identification
Endress + Hauser 9
2.1.2 Ordering structure
This overview does not mark options which are mutually exclusive.
10 Approval: Basic weight
A Non-hazardous area 7.1 kg
1 ATEX II 1/2G EEx ia IIC T6
6 ATEX II 1/2G EEx ia IIC T6, WHG
G ATEX II 3G EEx nA II T6
I NEPSI Ex ia IIC T6 (in preparation)
S FM IS Cl.I Div.1 Gr. A-D
U CSA IS Cl.I Div.1 Gr. A-D
KTIIS ExiaIICT3
LTIIS ExiaIICT6
Y Special version
20 Antenna; Inactive length: Additional weight
H PTFE antistatic 390mm/15", fully insul.; nozzle height max 100mm/4"
J PTFE antistatic 540mm/21", fully insul.; nozzle height max 250mm/10" 0.4 kg
E PTFE 390mm/15", fully insulated; nozzle height max 100mm/4"
F PTFE 540mm/21", fully insulated; nozzle height max 250mm/10" 0.4 kg
Y Special version
30 Process connection: Additional weight
-- Clamp-connections --
TEJ Tri-Clamp ISO2852 DN40-51 (2"), 316L
TLJ Tri-Clamp ISO2852 DN70-76.1 (3"), 316L 0.4 kg
-- EN-Flanges --
CFJ DN50 PN10/16 B1, 316L flange EN1092-1 (DIN2527 C) 2.9 kg
CFK DN50 PN10/16, PTFE >316L flange EN1092-1 (DIN2527) 3.0 kg
CMJ DN80 PN10/16 B1, 316L flange EN1092-1 (DIN2527 C) 4.8 kg
CNJ DN80 PN25/40 B1, 316L flange EN1092-1 (DIN2527 C) 5.9 kg
CMK DN80 PN10/16, PTFE >316L flange EN1092-1 (DIN2527) 4.9 kg
CQJ DN100 PN10/16 B1, 316L flange EN1092-1 (DIN2527 C) 5.8 kg
CQK DN100 PN10/16, PTFE >316L flange EN1092-1 (DIN2527) 5.9 kg
CWJ DN150 PN10/16 B1, 316L flange EN1092-1 (DIN2527 C) 10.6 kg
CWK DN150 PN10/16, PTFE >316L flange EN1092-1 (DIN2527) 10.8 kg
-- ANSI-Flanges --
AEJ 2" 150lbs RF, 316/316L flange ANSI B16.5 2.4 kg
AEK 2" 150lbs, PTFE >316/316L flange ANSI B16.5 2.5 kg
ALJ 3" 150lbs RF, 316/316L flange ANSI B16.5 5.0 kg
AMJ 3" 300lbs RF, 316/316L flange ANSI B16.5 6.8 kg
ALK 3" 150lbs, PTFE >316/316L flange ANSI B16.5 5.1 kg
APJ 4" 150lbs RF, 316/316L flange ANSI B16.5 7.0 kg
AQJ 4" 300lbs RF, 316/316L flange ANSI B16.5 11.5 kg
APK 4" 150lbs, PTFE >316/316L flange ANSI B16.5 7.1 kg
AVJ 6" 150lbs RF, 316/316L flange ANSI B16.5 11.3 kg
AVK 6" 150lbs, PTFE >316/316L flange ANSI B16.5 11.5 kg
-- JIS-Flanges --
KEJ 10K 50 RF, 316L flange JIS B2238 2.1 kg
KEK 10K 50, PTFE >316L flange JIS B2238 2.2 kg
KLJ 10K 80 RF, 316L flange JIS B2238 3.4 kg
KLK 10K 80, PTFE >316L flange JIS B2238 3.5 kg
KPJ 10K 100 RF, 316L flange JIS B2238 4.5 kg
KPK 10K 100, PTFE >316L flange JIS B2238
KVJ 10K 150 RF, 316L flange JIS B2238 9.9 kg
KVK 10K 150, PTFE >316L flange JIS B2238 10.1 kg
YY9 Special version
40 Output; Operation:
A 4-20mA HART; 4-line display VU331, envelope curve display on site
Y Special version
50 Housing:
C T12 Alu, coated. IP65 NEMA4X, separate conn. compartment
Y Special version
FMR531- Product designation (Part 1)

Identification Micropilot S FMR531 with HART/4...20 mA
10 Endress + Hauser
60 Cable entry:
2GlandM20
3ThreadG1/2
4 Thread NPT1/2
9 Special version
70 Weight + measure approval:
A NMi + PTB (<1mm) type approval
F NMi witnessed initial verificat. (<1mm) type approval
G PTB witnessed initial verificat. (<1mm) type approval
R Not selected; Inventory control version (3mm)
Y Special version
80 Additional option:
A Basic version
S GL/ABS marine certificate
Y Special version
FMR531- Complete product designation

Micropilot S FMR531 with HART/4...20 mA Identification
Endress + Hauser 11
2.2 Scope of delivery
"Caution!
It is essential to follow the instructions concerning the unpacking, transport and storage of
measuring instruments given in the chapter "Incoming acceptance, transport, storage" on Page 13!
The scope of delivery consists of:
• Assembled instrument
• Endress+Hauser operating program (on the enclosed CD-ROM)
•2seals
• Accessories (see Page 68).
Accompanying documentation:
• Short manual (basic setup/troubleshooting): housed in the instrument
• Operating manual (this manual)
• Approval documentation: if this is not included in the operating manual.
!Note!
The operating manual BA217F - "Description of Instrument functions" can be found on the enclosed
CD-ROM.
2.3 Certificates and approvals
CE mark, declaration of conformity
The device is designed to meet state-of-the-art safety requirements, has been tested and left the
factory in a condition in which it is safe to operate. The device complies with the applicable
standards and regulations as listed in the EC declaration of conformity and thus complies with the
statutory requirements of the EG directives. Endress+Hauser confirms the successful testing of the
device by affixing to it the CE mark.
2.4 Registered trademarks
KALREZ®, VITON®, TEFLON®
Registered trademark of the company, E.I. Du Pont de Nemours & Co., Wilmington, USA
TRI-CLAMP®
Registered trademark of the company, Ladish & Co., Inc., Kenosha, USA
HART®
Registered trademark of HART Communication Foundation, Austin, USA
ToF®
Registered trademark of the company Endress+Hauser GmbH+Co. KG, Maulburg, Germany
PulseMaster®
Registered trademark of the company Endress+Hauser GmbH+Co. KG, Maulburg, Germany
PhaseMaster®
Registered trademark of the company Endress+Hauser GmbH+Co. KG, Maulburg, Germany
FieldCare®
Registered trademark of the Endress+Hauser Process Solutions AG, Reinach, Switzerland

Mounting Micropilot S FMR531 with HART/4...20 mA
12 Endress + Hauser
3Mounting
3.1 Quick installation guide
L00-FMR531xx-17-00-00-en-003
3
1
2
#
90°
90°
90°
90°
90°
90°
9
90°
90°
90°
±2°
0…2°
DN80…150
ANSI 3…6”
DN50
ANSI 2”
marker at instrument flange
T12 housing
Turn housing
Observe orientation when installing!
Installation in tank (free space):
Mark on process connector facing the nearest tank wall!
The housing can be turned in
order to simplify access to the display
and the terminal compartment
Allen key
4 mm
tighten strongly
by hand

Micropilot S FMR531 with HART/4...20 mA Mounting
Endress + Hauser 13
3.2 Incoming acceptance, transport, storage
3.2.1 Incoming acceptance
Check the packing and contents for any signs of damage. Check the shipment, make sure nothing
is missing and that the scope of supply matches your order.
3.2.2 Transport
"Caution!
Follow the safety instructions and transport conditions for instruments of more than 18 kg.
3.2.3 Storage
Pack the measuring instrument so that is protected against impacts for storage and transport. The
original packing material provides the optimum protection for this.
The permissible storage temperature is -40 °C…+80 °C.

Mounting Micropilot S FMR531 with HART/4...20 mA
14 Endress + Hauser
3.3 Installation Conditions
3.3.1 Dimensions
L00-FMR531xx-06-00-00-en-004
ENDRESS+HAUSER
Micropilot II
65
(2.56)
L2
390/ 540
(15.35/21.26)
390/ 540
(15.35/21.26)
129 (5.08)
68
(2.68)
94
(3.7)
161 (6.34)
33
(1.3)
33
(1.3)
85
(3.35)
D
b
77
(3)
2”/3” Tri-clamp
ISO 2852
Ø
77
(3)
Ø
ØØ
mm (inch)
PTFE
(TFM1600)
L2
b[mm]
D[mm]
DN 50
20
165
DN 80
20(24)
220(200)
DN 150
22
285
DN 100
20
220
b[mm]
D[mm]
3"
23.9 (28.4)
190.5 (209.5)
6"
25.4
279.4
4"
23.9 (31.8)
228.6 (254)
2"
19.1
152.4
b[mm]
D[mm]
DN 80
18
185
DN 100
18
210
DN 50
16
155
DN 150
22
280
Inactive length, equivalent
to max. nozzleheight
L2 = 100 mm / 27mm
Flange
for 10K
Flange to JIS B2220
for 150lbs (for 300 lbs)
Flange
Flange to ANSI B16.5
Flange
for PN 16 ( for PN 40)
Flange to EN 1092-1 (agreeable to DIN2527)
PTFE,
antistatic
Flange DN 50...150
or equivalent

Micropilot S FMR531 with HART/4...20 mA Mounting
Endress + Hauser 15
3.3.2 Engineering hints
Orientation
• Recommended distance (1) wall - outer edge
of nozzle:: ~1/6 of tank diameter (see Beam
angle on Page 16).
• 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 (see "Accessories" on Page 68).
L00-FMR53xxx-17-00-00-yy-009
Tank installations
• Avoid any installations (1), like limit
switches, temperature sensors, etc., inside the
signal beam (refer to beam angle (see "Beam
angle" on Page 16).
• 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.
Optimization 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: refer to "optimum
mounting position".
• 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.
• Metallic screens (3) mounted at a slope spread
theradar signals and can, therefore,
reduceinterference echoes.
Please contact Endress+Hauser for further
information.
L00-FMR53xxx-17-00-00-yy-010

Mounting Micropilot S FMR531 with HART/4...20 mA
16 Endress + Hauser
Beam angle
The beam angle is defined as the angle a where 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.
Beamwidth diameter Was function of antenna type (beam angle α) and measuring distance D:
"Caution!
Make sure that only one tank wall (not two tank walls) is directly hit by the radar beam!
FMR531
L00-FMR53xxx-14-00-00-xx-003
Rod antenna
Beam angle α30°
Gauge Reference height
(GRH)
recommended distance
from the tank wall (W/2)
3 m / 10 ft 0.8 m
6 m / 20 ft 1.6 m
9 m / 30 ft 2.4 m
12 m / 40 ft 3.2 m
15 m / 49 ft 4 m
20 m / 65 ft 5 m
D
W/2

Micropilot S FMR531 with HART/4...20 mA Mounting
Endress + Hauser 17
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.
•Foroverspill protection, it is possible to define a safety distance (SD) additionally to the
blocking distance (BD).
• Depending on its consistence, foam can either absorb microwaves or reflect them off the foam
surface. Measurement is possible under certain conditions.
•DistanceBdefined the smallest recommended measurement range.
• 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 ruled out (see »Beam angle« on Page 16).
• 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 with the FMR531 up to the tip of the antenna. However, due
to considerations regarding accuracy corrosion and build-up, the end of the measuring range
should not be chosen any closer than A(see Fig.) to the tip of the antenna.
• The safety distance (SD) is set to 0.1 m (4") by default and generating an alarm.
L00-FMR53xxx-17-00-00-en-011
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 (E681).
reference: flange / BD
(cf. picture)
reference: antenna tip
(cf. picture)
Blocking
distance
Safety
distance
recommended additional settings
BD [m / ft] SD [m / ft] A [mm / inch] B [m / ft] C [mm / inch]
FMR531 0.39/1.3 or
0.54/1.8 0.1/0.3 50 / 2 0.5 /1.64 150...300/6...12
A
100%
0%
B
BD
SD
C
ØD
max. level

Mounting Micropilot S FMR531 with HART/4...20 mA
18 Endress + Hauser
Measuring range
The usable measuring range depends on the size of the antenna, the reflectivity of the medium, the
mounting location, and eventual interference reflections.
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.
Measuring range depending on product class for Micropilot S FMR531
Media group DC (εr) Examples
A1.4...1.9 non-conducting liquids, e.g. liquefied gas (LPG). For more information please contact
your Endress+Hauser representative.
B1.9...4 non-conducting liquids, e.g. benzene, oil, toluene, white products, black products,
crudes, bitumen/asphalts, …
C4...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 Free space (Storage tank)
Measuring range
DN150/200/250
ADC (εr) = 1.4...1.9 —
BDC (εr) = 1.9...4 10 m/33 ft
CDC (εr) = 4...10 DN150: 15 m/50 ft
DDC (εr) > 10 DN150: 20 m/65 ft
max. measuring
range with custody
transfer approvals
NMi and PTB:
10 m/33 ft

Micropilot S FMR531 with HART/4...20 mA Mounting
Endress + Hauser 19
Blocking distance
The blocking distance (= BD) is the minimum distance form the reference point of the measurement
(mounting flange) to the medium surface at maximum level.
L00-FMR531xx-15-00-00-en-001
Blocking distance (BD)1)
1) 1 mm accuracy under reference conditions
Free space (Storage tank)
from flange 390/540 mm 15"/21"

Mounting Micropilot S FMR531 with HART/4...20 mA
20 Endress + Hauser
3.4 Installation instructions
3.4.1 Mounting kit
In addition to the tool needed for flange mounting, you will require the following tool:
• 4 mm Allen wrench for turning the housing.
3.4.2 Installation in tank (free space)
Optimum mounting position
L00-FMR531xx-15-00-00-en-001
90°
90°
90°
90°
90°
90°
9
90°
90°
90°
±2°
0…2°
DN80…150
ANSI 3…6”
DN50
ANSI 2”
marker at instrument flange
Standard installation
• Observe installation instructions on Page 16.
• Marker is aligned towards tank wall.
• The marker is always exactly in the middle
between two bolt-holes in the flange.
• The device shall not be mounted in a slant
towards the tank wall.
• After mounting, the housing can be turned
350° in order to simplify access to the display
and the terminal compartment.
• In order to minimize temperature influences,
spring washers should be used in combination
with the plated flange of the FMR531.
• The rod antenna must extend below the
nozzle.
• Align rod antenna vertically
L00-FMR531xx-15-00-00-en-001
Antenna size 390 / 15 540 / 21
H [mm / inch] < 100 / < 4 < 250 / < 10