Endress+Hauser Micropilot FMR63B Manual

Level measurement in hygienic applications
Application
• Continuous, non-contact level measurement of liquids in hygienic applications
• Process connections: For hygiene applications (e.g.: Tri-Clamp or M24 adapter
concept)
• Maximum measuring range: 80 m (262 ft)
• Temperature: –40 to +200 °C (–40 to +392 °F)
• Pressure: –1 to +25 bar (–14.5 to +363 psi)
• Accuracy: ±1 mm (±0.04 in)
Your benefits
• PTFE or PEEK antenna for hygienic requirements
• Reliable measurement thanks to strong signal focusing, even with multiple
internal fixtures
• Easy, guided commissioning with intuitive user interface
•Bluetooth®wireless technology for commissioning, operation and maintenance
• SIL2 as per IEC 61508, SIL3 for homogeneous redundancy
• Longer calibration cycles with Radar Accuracy Index
Products Solutions Services
Technical Information
Micropilot FMR63B
HART
Free space radar
TI01685F/00/EN/02.23-00
71597494
2023-02-20

Micropilot FMR63B HART
2 Endress+Hauser
Table of contents
Important document information ............... 4
Symbols .................................... 4
Graphic conventions ........................... 5
Function and system design ................... 5
Measuring principle ............................ 5
Input ..................................... 6
Measured variable ............................. 6
Measuring range .............................. 6
Operating frequency .......................... 12
Transmission power ........................... 12
Output .................................. 12
Output signal ............................... 12
Signal on alarm .............................. 13
Linearization ............................... 13
Load ..................................... 13
Protocol-specific data ......................... 13
Wireless HART data ........................... 14
Power supply ............................. 15
Terminal assignment .......................... 15
Terminals ................................. 16
Available device plugs ......................... 16
Supply voltage .............................. 17
Potential equalization ......................... 17
Cable entries ............................... 18
Cable specification ............................ 18
Overvoltage protection ......................... 18
Performance characteristics .................. 19
Reference operating conditions ................... 19
Maximum measured error ....................... 19
Measured value resolution ...................... 19
Response time .............................. 20
Influence of ambient temperature ................. 20
Influence of gas phase ......................... 20
Mounting ................................ 21
Mounting location ............................ 21
Orientation ................................ 21
Installation instructions ........................ 22
Beam angle ................................ 23
Special mounting instructions .................... 25
Environment .............................. 26
Ambient temperature range ..................... 26
Ambient temperature limits ..................... 26
Storage temperature .......................... 33
Climate class ............................... 33
Installation height as per IEC61010-1 Ed.3 ........... 33
Degree of protection .......................... 33
Vibration resistance ........................... 34
Electromagnetic compatibility (EMC) ............... 34
Process .................................. 34
Process pressure range ......................... 34
Dielectric constant ............................ 36
Mechanical construction .................... 36
Dimensions ................................ 36
Weight ................................... 46
Materials .................................. 47
Operability ............................... 50
Operating concept ............................ 50
Languages ................................. 50
Local operation .............................. 51
Local display ............................... 51
Remote operation ............................ 52
System integration ........................... 52
Supported operating tools ...................... 52
Certificates and approvals ................... 52
CE mark ................................... 52
RoHS ..................................... 52
RCM marking ............................... 52
Ex approvals ................................ 52
Functional safety ............................. 53
Pressure equipment with allowable pressure ≤
200 bar (2 900 psi) ........................... 53
Radio approval .............................. 53
EN 302372 radio standard ...................... 53
FCC ...................................... 53
Industry Canada ............................. 53
Other standards and guidelines ................... 54
Ordering information ....................... 54
Calibration ................................. 54
Service ................................... 55
Test, certificate, declaration ...................... 55
Marking .................................. 55
Application packages ....................... 56
Heartbeat Technology ......................... 56
Accessories ............................... 57
Weather protection cover 316L ................... 57
Plastic weather protection cover ................... 57
M12 socket ................................ 58
Remote display FHX50B ........................ 59
Gas-tight feedthrough ......................... 60
Process adapter M24 .......................... 60
Commubox FXA195 HART ...................... 60
HART Loop Converter HMX50 .................... 60
FieldPort SWA50 ............................ 60
Wireless HART adapter SWA70 ................... 60
Fieldgate FXA42 ............................. 60
Field Xpert SMT70 ............................ 61
DeviceCare SFE100 ........................... 61
FieldCare SFE500 ............................ 61
Memograph M .............................. 61

Micropilot FMR63B HART
Endress+Hauser 3
RN42 .................................... 61
Documentation ............................ 61
Document function ........................... 61
Registered trademarks ...................... 62

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Important document information
Symbols Safety symbols
DANGER
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in serious or
fatal injury.
WARNING
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in serious or
fatal injury.
CAUTION
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in minor or
medium injury.
NOTICE
This symbol contains information on procedures and other facts which do not result in personal
injury.
Electrical symbols
Direct current
Alternating current
Direct current and alternating current
Ground connection
A grounded terminal which, as far as the operator is concerned, is grounded via a grounding system.
Protective earth (PE)
Ground terminals that must be connected to ground prior to establishing any other connections.
The ground terminals are located on the inside and outside of the device.
• Inner ground terminal; protective earth is connected to the mains supply.
• Outer ground terminal; device is connected to the plant grounding system.
Symbols for certain types of information and graphics
Permitted
Procedures, processes or actions that are permitted
Preferred
Procedures, processes or actions that are preferred
Forbidden
Procedures, processes or actions that are forbidden
Tip
Indicates additional information
Reference to documentation
Reference to graphic
1, 2, 3, ...
Item numbers
A, B, C, ...
Views
-
Hazardous area
Indicates the hazardous area
.
Safe area (non-hazardous area)
Indicates the non-hazardous area

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Graphic conventions • Installation, explosion and electrical connection drawings are presented in simplified format
• Devices, assemblies, components and dimensional drawings are presented in reduced-line
format
• Dimensional drawings are not to-scale representations; the dimensions indicated are
rounded off to 2 decimal places
• Unless otherwise described, flanges are presented with sealing surface form EN1091-1, B2;
ASME B16.5, RF; JIS B2220, RF
Function and system design
Measuring principle The Micropilot is a "downward-looking" measuring system, operating based on the frequency
modulated continuous wave method (FMCW). The antenna emits an electromagnetic wave at a
continuously varying frequency. This wave is reflected by the product and received again by the
antenna.
D
R
A0032017
 1 FMCW principle: transmission and reflection of the continuous wave
R Reference point of measurement
D Distance between reference point and product surface
The frequency of this wave is modulated in the form of a sawtooth signal between two limit
frequencies f1 and f2:
f
t
1
2
f2
f1
∆t
∆f
A0023771
 2 FMCW principle: result of frequency modulation
1 Transmitted signal
2 Received signal
This results in the following difference frequency at any time between the transmitted signal and the
received signal:
∆f = k ∆t
where ∆t is the run time and k is the specified increase in frequency modulation.
∆t is given by the distance D between the reference point R and the product surface:

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D = (c ∆t) / 2
where c is the speed of propagation of the wave.
In summary, D can be calculated from the measured difference frequency Δf. D is then used to
determine the content of the tank or silo.
Input
Measured variable The measured variable is the distance between the reference point and the product surface. The level
is calculated based on "E", the empty distance entered.
Measuring range The measuring range starts at the point where the beam hits the tank floor. Levels below this point
cannot be measured, particularly in the case of spherical bases or conical outlets.
Maximum measuring range
The maximum measuring range depends on the antenna size and design.
Antenna Maximum measuring range
Integrated, PEEK, 20 mm (0.75 in) 10 m (32.8 ft)
Cladded flush mount, PTFE, 50 mm (2 in) 50 m (164 ft)
Cladded flush mount, PTFE, 80 mm (3 in) 80 m (262 ft)
Usable measuring range
The usable measuring range depends on the antenna size, the medium's reflective properties, the
installation position and any possible interference reflections.
In principle, measurement is possible up to the tip of the antenna.
To avoid any material damage from corrosive or aggressive media or deposit buildup on the antenna,
the end of the measuring range should be selected 10 mm (0.4 in) before the tip of the antenna.
100%
0%
BA
H
R
C
A0051658
A Length of antenna + 10 mm (0.4 in)
B Usable measuring range
C 50 to 80 mm (1.97 to 3.15 in); medium εr <2
H Vessel height
R Reference point of measurement, varies depending on the antenna system (see mechanical construction)

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In the case of media with a low dielectric constant εr <2, the tank floor can be visible through the
medium at very low levels (less than level C). Reduced accuracy must be expected in this range. If this
is not acceptable, the zero point should be located at a distance C above the tank floor in these
applications (see Figure).
The media groups and the possible measuring range are described as a function of the application
and media group in the following section. If the dielectric constant of the medium is not known, to
ensure a reliable measurement assume the medium belongs to group B.
Media groups
•A0 (εr 1.2 to 1.4)
e.g. n-butane, liquid nitrogen, liquid hydrogen
•A (εr 1.4 to 1.9)
Non-conductive liquids, e.g. liquefied gas
•B (εr 1.9 to 4)
Non-conductive liquids, e.g. gasoline, oil, toluene, etc.
•C (εr 4 to 10)
e.g. concentrated acid, organic solvents, ester, aniline, etc.
•D (εr >10)
Conductive liquids, aqueous solutions, diluted acids, bases and alcohol
Measurement of the following media with absorbing gas phase
For example:
• Ammonia
• Acetone
• Methylene chloride
• Methyl ethyl ketone
• Propylene oxide
• VCM (vinyl chloride monomer)
To measure absorbing gases, either use a guided radar, measuring devices with another
measuring frequency or another measuring principle.
If measurements must be performed in one of these media, please contact Endress+Hauser.
For the dielectric constants (DC values) of many media commonly used in industry, please refer
to:
• Dielectric constant (DC value) Compendium CP01076F
• The Endress+Hauser "DC Values app" (available for Android and iOS)
Measurement in storage vessel
Storage vessel - measuring conditions
Calm medium surface (e.g. bottom filling, filling via immersion tube or rare filling from above)
Integrated antenna, PEEK, 20 mm (0.75 in) in storage vessel
Media group Measuring range
A0 (εr 1.2 to 1.4) 1.5 m (5 ft)
A (εr 1.4 to 1.9) 2.5 m (8 ft)
B (εr 1.9 to 4) 5 m (16 ft)
C (εr 4 to 10) 8 m (26 ft)
D (εr >10) 10 m (33 ft)

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Antenna, PTFE cladded flush mount, 50 mm (2 in) in storage vessel
Media group Measuring range
A0 (εr 1.2 to 1.4) 7 m (23 ft)
A (εr 1.4 to 1.9) 12 m (39 ft)
B (εr 1.9 to 4) 23 m (75 ft)
C (εr 4 to 10) 40 m (131 ft)
D (εr >10) 50 m (164 ft)
Antenna, PTFE cladded flush mount, 80 mm (3 in) in storage vessel
Media group Measuring range
A0 (εr 1.2 to 1.4) 22 m (72 ft)
A (εr 1.4 to 1.9) 40 m (131 ft)
B (εr 1.9 to 4) 50 m (164 ft)
C (εr 4 to 10) 65 m (231 ft)
D (εr >10) 80 m (262 ft)
Cladded antenna, PEEK, 20 mm (0.75 in) in storage vessel
Media group Measuring range
A0 (εr 1.2 to 1.4) 1.5 m (5 ft)
A (εr 1.4 to 1.9) 2.5 m (8 ft)
B (εr 1.9 to 4) 5 m (16 ft)
C (εr 4 to 10) 8 m (26 ft)
D (εr >10) 10 m (33 ft)

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Cladded antenna, PEEK, 40 mm (1.5 in) in storage vessel
Media group Measuring range
A0 (εr 1.2 to 1.4) 3 m (10 ft)
A (εr 1.4 to 1.9) 6 m (20 ft)
B (εr 1.9 to 4) 11 m (36 ft)
C (εr 4 to 10) 15 m (49 ft)
D (εr >10) 22 m (72 ft)
Measurement in buffer vessel
Buffer vessel - measuring conditions
Moving medium surface (e.g. permanent free filling from above, mixing jets)
Integrated antenna, PEEK, 20 mm (0.75 in) in buffer vessel
Media group Measuring range
A0 (εr 1.2 to 1.4) 1 m (3.3 ft)
A (εr 1.4 to 1.9) 1.5 m (5 ft)
B (εr 1.9 to 4) 3 m (10 ft)
C (εr 4 to 10) 6 m (20 ft)
D (εr >10) 8 m (26 ft)
Antenna, PTFE cladded flush mount, 50 mm (2 in) in buffer vessel
Media group Measuring range
A0 (εr 1.2 to 1.4) 4 m (13 ft)
A (εr 1.4 to 1.9) 7 m (23 ft)
B (εr 1.9 to 4) 13 m (43 ft)
C (εr 4 to 10) 28 m (92 ft)
D (εr >10) 44 m (144 ft)

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Antenna, PTFE cladded flush mount, 80 mm (3 in) in buffer vessel
Media group Measuring range
A0 (εr 1.2 to 1.4) 12 m (39 ft)
A (εr 1.4 to 1.9) 23 m (75 ft)
B (εr 1.9 to 4) 45 m (148 ft)
C (εr 4 to 10) 60 m (197 ft)
D (εr >10) 70 m (230 ft)
Cladded antenna, PEEK, 20 mm (0.75 in) in buffer vessel
Media group Measuring range
A0 (εr 1.2 to 1.4) 1 m (3.3 ft)
A (εr 1.4 to 1.9) 1.5 m (5 ft)
B (εr 1.9 to 4) 3 m (10 ft)
C (εr 4 to 10) 6 m (20 ft)
D (εr >10) 8 m (26 ft)
Cladded antenna, PEEK, 40 mm (1.5 in) in buffer vessel
Media group Measuring range
A0 (εr 1.2 to 1.4) 1.5 m (5 ft)
A (εr 1.4 to 1.9) 3 m (10 ft)
B (εr 1.9 to 4) 6 m (20 ft)
C (εr 4 to 10) 13 m (43 ft)
D (εr >10) 20 m (66 ft)
Measurement in vessel with agitator
Vessel with agitator - measuring conditions
Turbulent medium surface (e.g. from filling from above, stirrers and baffles)

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Integrated antenna, PEEK, 20 mm (0.75 in) in vessel with agitator
Media group Measuring range
A (εr 1.4 to 1.9) 1 m (3.3 ft)
B (εr 1.9 to 4) 1.5 m (5 ft)
C (εr 4 to 10) 3 m (10 ft)
D (εr >10) 5 m (16 ft)
Antenna, PTFE cladded flush mount, 50 mm (2 in) in vessel with agitator
Media group Measuring range
A0 (εr 1.2 to 1.4) 2 m (7 ft)
A (εr 1.4 to 1.9) 4 m (13 ft)
B (εr 1.9 to 4) 7 m (23 ft)
C (εr 4 to 10) 15 m (49 ft)
D (εr >10) 25 m (82 ft)
Antenna, PTFE cladded flush mount, 80 mm (3 in) in vessel with agitator
Media group Measuring range
A0 (εr 1.2 to 1.4) 7 m (23 ft)
A (εr 1.4 to 1.9) 13 m (43 ft)
B (εr 1.9 to 4) 25 m (82 ft)
C (εr 4 to 10) 50 m (164 ft)
D (εr >10) 60 m (197 ft)

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Cladded antenna, PEEK, 20 mm (0.75 in) in vessel with agitator
Media group Measuring range
A (εr 1.4 to 1.9) 1 m (3.3 ft)
B (εr 1.9 to 4) 1.5 m (5 ft)
C (εr 4 to 10) 3 m (10 ft)
D (εr >10) 5 m (16 ft)
Cladded antenna, PEEK, 40 mm (1.5 in) in vessel with agitator
Media group Measuring range
A0 (εr 1.2 to 1.4) 1 m (3.3 ft)
A (εr 1.4 to 1.9) 1.5 m (5 ft)
B (εr 1.9 to 4) 3 m (10 ft)
C (εr 4 to 10) 7 m (23 ft)
D (εr >10) 11 m (36 ft)
Operating frequency Approx. 80 GHz
Up to 8 devices can be installed in a tank without the devices mutually influencing one another.
Transmission power • Peak power: 6.3 mW
• Average output power: 63 µW
Output
Output signal HART
Signal coding:
FSK ±0.5 mA over current signal
Data transmission rate:
1 200 Bit/s
Galvanic isolation:
Yes
Current output
4 to 20 mA with superimposed digital communication protocol HART, 2-wire

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The current output offers a choice of three different operating modes:
• 4.0 to 20.5 mA
• NAMUR NE 43: 3.8 to 20.5 mA (factory setting)
• US mode: 3.9 to 20.8 mA
Signal on alarm Current output
Failure mode (according to NAMUR Recommendation NE 43):
• Minimum alarm (= factory setting): 3.6 mA
• Maximum alarm: 22 mA
Local display
Status signal (according to NAMUR Recommendation NE 107):
Plain text display
Operating tool via service interface (CDI)
Status signal (according to NAMUR Recommendation NE 107):
Plain text display
Operating tool via HART communication
Status signal (according to NAMUR Recommendation NE 107):
Plain text display
Linearization The linearization function of the device allows the conversion of the measured value into any unit of
length, weight, flow or volume.
Pre-programmed linearization curves
Linearization tables for calculating the volume in the following vessels are preprogrammed into the
device:
• Pyramid bottom
• Conical bottom
• Angled bottom
• Horizontal cylinder
• Sphere
Other linearization tables of up to 32 value pairs can be entered manually.
Load 4 to 20 mA HART
U – 10.5 V
23 mA
[ ]W
10.5 3530
1065
848
£
U
[V]
1
2
RL max
3
RL max
A0039232
1 Power supply 10.5 to 30 VDC Ex i
2 Power supply 10.5 to 35 VDC, for other types of protection and non-certified device versions
3 RLmax maximum load resistance
U Supply voltage
Operation via handheld terminal or PC with operating program: take minimum communication
resistor of 250 Ω into consideration.
Protocol-specific data HART
Manufacturer ID:
17 (0x11{hex})

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Device type ID:
0x11C1
Device revision:
1
HART specification:
7
DD version:
1
Device description files (DTM, DD)
Information and files under:
•www.endress.com
On the product page for the device: Documents/Software → Device drivers
•www.fieldcommgroup.org
HART load:
Min. 250 Ω
HART device variables
The following measured values are assigned to the device variables at the factory:
Device variable Measured value
Assign PV 1) Level linearized
Assign SV Distance
Assign TV Absolute echo amplitude
Assign QV Relative echo amplitude
1) The PV is always applied to the current output.
Choice of HART device variables
• Level linearized
• Distance
• Terminal voltage
• Electronics temperature
• Sensor temperature
• Absolute echo amplitude
• Relative echo amplitude
• Area of incoupling
• Build-up index
• Build-up detected
• Foam index
• Foam detected
• Percent of range
• Loop current
• Terminal current
• Not used
Supported functions
• Burst mode
• Additional transmitter status
• Device locking
Wireless HART data Minimum start-up voltage:
10.5 V
Start-up current:
< 3.6 mA
Starting time:
< 15 s
Minimum operating voltage:
10.5 V

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Multidrop current:
4 mA
Time to establish connection:
< 30 s
Power supply
Terminal assignment Single compartment housing
+
-
1
2
3
A0042594
 3 Connection terminals and ground terminal in the connection compartment
1 Positive terminal
2 Negative terminal
3 Internal ground terminal
Dual compartment housing
+
-
12
3
A0042803
 4 Connection terminals and ground terminal in the connection compartment
1 Positive terminal
2 Negative terminal
3 Internal ground terminal

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Dual compartment housing, L-form
+
-
1
2
3
A0045842
 5 Connection terminals and ground terminal in the connection compartment
1 Positive terminal
2 Negative terminal
3 Internal ground terminal
Terminals • Supply voltage and internal ground terminal: 0.5 to 2.5 mm2 (20 to 14 AWG)
• External ground terminal: 0.5 to 4 mm2 (20 to 12 AWG)
Available device plugs In the case of devices with a plug, it is not necessary to open the housing for connection
purposes.
Use the enclosed seals to prevent the penetration of moisture into the device.
Devices with M12 plug
2
1
3
4
A0011175
 6 View of the plug-in connection on the device
1 Signal +
2 Not assigned
3 Signal –
4 Ground
Various M12 sockets are available as accessories for devices with M12 plugs.

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Measuring devices with Harting plug Han7D
Han7D
–
+
+ –
–
+
A B
1
5
4
678
2
3
A0041011
A Electrical connection for devices with Harting plug Han7D
B View of the plug-in connection on the device
- Brown
 Green/yellow
+ Blue
Material
CuZn, gold-plated plug-in jack and plug contacts
Supply voltage The supply voltage depends on the selected type of device approval
Non-hazardous, Ex d, Ex e 10.5 to 35 VDC
Ex i 10.5 to 30 VDC
Nominal current 4 to 20 mA
The power unit must be tested to ensure it meets safety requirements (e.g., PELV, SELV, Class
2) and complies with the relevant protocol specifications.
A suitable circuit breaker must be provided for the device in accordance with IEC/EN61010-1
Potential equalization The protective ground on the device must not be connected. If necessary, the potential matching line
can be connected to the outer ground terminal of the transmitter before the device is connected.
1
B
1
D
1
A
1
E
1
C
A0046583
A Single compartment housing, plastic
B Single compartment housing, aluminum
C Single compartment housing, 316L hygiene (Ex device)
D Dual compartment housing
E Dual compartment housing, L-form
1 Ground terminal for connecting the potential matching line

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LWARNING
Explosion Hazard!
‣Please refer to the separate documentation on applications in hazardous areas for the safety
instructions.
For optimum electromagnetic compatibility:
• Keep the potential matching line as short as possible
• Observe a cross-section of at least 2.5 mm2 (14 AWG)
Cable entries
11 11
2
AB D E
2 2 2
C
1
2
A0046584
A Single compartment housing, plastic
B Single compartment housing, aluminum
C Single compartment housing, 316L hygiene
D Dual compartment housing
E Dual compartment housing, L-form
1 Cable entry
2 Dummy plug
The type of cable entry depends on the device version ordered.
Always route connecting cables downwards so that moisture cannot penetrate the connection
compartment.
If necessary, create a drip loop or use a weather protection cover.
Cable specification Rated cross-section
• Supply voltage
0.5 to 2.5 mm2 (20 to 13 AWG)
• Protective earth or grounding of the cable shield
> 1 mm2 (17 AWG)
• External ground terminal
0.5 to 4 mm2 (20 to 12 AWG)
Cable outer diameter
The cable outer diameter depends on the cable gland used
• Coupling, plastic:
⌀5 to 10 mm (0.2 to 0.38 in)
• Coupling, nickel-plated brass:
⌀7 to 10.5 mm (0.28 to 0.41 in)
• Coupling, stainless steel:
⌀7 to 12 mm (0.28 to 0.47 in)
Overvoltage protection The overvoltage protection can optionally be ordered as a "Mounted accessory" via the product
structure
Devices without optional overvoltage protection
The equipment fulfills the requirements of the product standard IEC / DIN EN 61326-1 (Table 2
Industrial Environment).
Depending on the type of port (DC power supply, input/output port) different testing levels according
to IEC / DIN EN 61326-1 against transient overvoltages (Surge) are applied (IEC / DIN EN
61000-4-5 Surge):
Test level on DC power ports and input/output ports is 1 000 V line to earth

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Devices with optional overvoltage protection
• Spark-over voltage: min. 400 VDC
• Tested according to IEC / DIN EN 60079-14 sub chapter 12.3 (IEC / DIN EN 60060-1 chapter 7)
• Nominal discharge current: 10 kA
NOTICE
Device could be destroyed
‣Always ground device with integrated overvoltage protection.
Overvoltage category
Overvoltage category II
Performance characteristics
Reference operating
conditions
• Temperature = +24 °C (+75 °F) ±5 °C (±9 °F)
• Pressure = 960 mbar abs. (14 psia) ±100 mbar (±1.45 psi)
• Humidity = 60 % ±15 %
• Reflector: metal plate with diameter ≥ 1 m (40 in)
• No major interference reflections inside the signal beam
Maximum measured error Reference accuracy
Accuracy
The accuracy is the sum of the non-linearity, non-repeatability and hysteresis.
• Measuring distance up to 0.8 m (2.62 ft): max. ±4 mm (±0.16 in)
• Measuring distance > 0.8 m (2.62 ft): ±1 mm (±0.04 in)
Non-repeatability
Non-repeatability is already included in the accuracy.
≤ 1 mm (0.04 in)
If conditions deviate from the reference operating conditions, the offset/zero point that results
from the installation conditions can be up to ±4 mm (±0.16 in). This additional offset/zero
point can be eliminated by entering a correction (Level correction parameter) during
commissioning.
Differing values in near-range applications
0.8 (2.62)
4 (0.16)
1 (0.04)
-1 (-0.04)
-4 (-0.16)
D [m (!)]
∆[mm (in)]
R
0
A0032636
 7 Maximum measured error in near-range applications
Δ Maximum measured error
R Reference point of the distance measurement
D Distance from reference point of antenna
Measured value resolution Dead band according to DIN EN IEC 61298-2 / DIN EN IEC 60770-1:

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20 Endress+Hauser
• Digital: 1 mm
• Analog: 1 µA
Response time According to DIN EN IEC 61298-2 / DIN EN IEC 60770-1 , the step response time is the time
following an abrupt change in the input signal up until the changed output signal has adopted 90 %
of the steady-state value for the first time.
The response time can be configured.
The following step response times apply (in accordance with DIN EN IEC 61298-2 / DIN EN IEC
60770-1) when damping is switched off:
• Pulse frequency ≥ 5/s (cycle time ≤ 200 ms)
at U= 10.5 to 35 V, I= 4 to 20 mA and Tamb= –50 to +80 °C (–58 to +176 °F)
• Step response time < 1 s
Influence of ambient
temperature
The output changes due to the effect of the ambient temperature with respect to the reference
temperature.
The measurements are performed according to DIN EN IEC 61298-3 / DIN EN IEC 60770-1
Digital output (HART)
Average TC = 2 mm/10 K
Analog (current output)
• Zero point (4 mA): average TC = 0.02 %/10 K
• Span (20 mA): average TC = 0.05 %/10 K
Influence of gas phase High pressure reduces the speed of propagation of the measuring signals in the gas/vapor above the
medium. This effect depends on the type of gas phase and its temperature. This results in a
systematic measured error that increases with increasing distance between the reference point of
the measurement (flange) and the surface of the product. The following table shows this measured
error for some typical gases/vapors (with regard to the distance, a positive value means that an
excessively large distance is measured):
Measured error for some typical gases/vapors
Gas phase Temperature Pressure
1 bar (14.5 psi) 10 bar (145 psi) 25 bar (362 psi)
Air/nitrogen +20 °C (+68 °F) 0.00 % +0.22 % +0.58 %
+200 °C (+392 °F) –0.01 % +0.13 % +0.36 %
+400 °C (+752 °F) –0.02 % +0.08 % +0.29 %
Hydrogen +20 °C (+68 °F) –0.01 % +0.10 % +0.25 %
+200 °C (+392 °F) –0.02 % +0.05 % +0.17 %
+400 °C (+752 °F) –0.02 % +0.03 % +0.11 %
Water (saturated steam) +100 °C (+212 °F) +0.02 % - -
+180 °C (+356 °F) - +2.10 % -
+263 °C (+505 °F) - - +4.15 %
+310 °C (+590 °F) - - -
+364 °C (+687 °F) - - -
With a known, constant pressure, it is possible to compensate for this measured error with a
linearization, for example.