Endress+Hauser micropilot M FMR 230 Manual

Technical Information
TI 345F/00/en Level-Radar
micropilot M
FMR 230/231/240
Smart Transmitter for continuous and
non-contact level measurement
Cost-effective 4…20 mA 2-wire technology
Suitable for hazardous locations
Features and benefits
•2-wire technology, low price:
A real alternative to differential
pressure, floats and displacers.
2-wire technology reduces wiring costs
and allows easy implementation into
existing systems.
•Non-contact measurement:
Measurement is almost independent
from product properties.
•Easy on-site operation via menu-driven
alphanumeric display.
•Easy commissioning, documentation
and diagnostics via operating software
(ToF Tool).
•2 frequency ranges – approx. 6 and
26 GHz:
No compromises, the right frequency
for every application.
•HART or PROFIBUS-PA respectively
Foundation Fieldbus protocol.
•High temperatures:
Suitablefor process temperatures up to
+200 °C (392 °F), up to 400 °C (752 °F)
with high-temperature antenna.
•Rod antenna with inactive length:
Reliable measurement in narrow
nozzles, with condensation and
build-up in the nozzle.
Application
The Micropilot M is used for continuous,
non-contact level measurement of
liquids, pastes, and slurries.
The measurement is not affected by
changing media, temperature changes,
gas blankets or vapours.
•The FMR 230 is especially suited for
measurement in buffer and process
tanks.
•The FMR 231 has its strengths
wherever high chemical compatibility is
required.
•The FMR 240 with the small (1½") horn
antenna is ideally suited for small
vessels. Additionally, it provides an
accuracy of ±3 mm.
FMR 231
FMR 230
FMR 240
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Micropilot M
2Endress+Hauser
Function and system design
Measuring principle The Micropilot is a "downward-looking" measuring system, operating based on the time-of-flight
method. It measures the distance from the reference point (process connection) to the product
surface. Radar impulses are emitted by an antenna, reflected off the product surface and
received again by the radar system.
Input
The reflected radar impulses are received by the antenna and transmitted into the electronics.
A microprocessor evaluates the signal and identifies the level echo caused by the reflection of the
radar impulse at the product surface. The unambiguous signal identification is accomplished by
the PulseMaster software, based on many years of experience with time-of-flight technology.
The mm-accuracy of the Micropilot S could be achieved with the patented algorithms of the
PhaseMaster software.
The distance D to the product surface is proportional to the time of flight t of the impulse:
D = c · t/2,
with c being the speed of light.
Based on the known empty distance E, the level L is calculated:
L = E – D
Refer to the above figure for the reference point for "E".
The Micropilot is equipped with functions to suppress interference echoes. The user can activate
these functions. They ensure that interference echoes (i.e. from edges and weld seams) are not
interpreted as level echo.
Output
The Micropilot is commissioned by entering an empty distance E (=zero), a full distance F (=span)
and an application parameter. The application parameter automatically adapts the instrument to
the measuring conditions. The data points “E” and “F” correspond with 4mA and 20mA for
instruments with current output. They correspond with 0 % and 100 % for digital outputs and the
display module.
A linearization, based on a table entered either manually or semi-automatically, can be activated
locally or remotely. This function provides a measurement in engineering units and a linear output
signal for spheres, horizontal cylindrical tanks and vessels with conical outlet.
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Micropilot M
Endress+Hauser 3
Equipment architecture Stand-alone
The Micropilot M can be used for measurement in a stilling well / bypass as well as in free space.
The instrument provides a 4…20 mA output with HART protocol, or PROFIBUS-PA respectively
Foundation Fieldbus communication.
4…20 mA output with HART protocol.
The complete measuring system consists of:
On-site operation:
•with display and operating module VU 331,
•with a Personal Computer, FXA 193 and the operating software ToF Tool.
The ToF Tool is a graphical operating software for instruments from Endress+Hauser that
operate based on the time-of-flight principle (radar, ultrasonic, guided micro-impulse). It assists
with commissioning, securing data, signal analysis and documentation of the measuring point.
Remote operation:
•with HART handheld DXR 275,
•with a Personal Computer, Commubox FXA 191 and the operating software COMMUWIN II
respectively ToF Tool.
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Micropilot M
4Endress+Hauser
System integration via PROFIBUS-PA
A maximum of 32 transmitters (8 if mounted in an explosion hazardous location EEx ia IIC
according to FISCO-model) can be connected to the bus. The segment coupler provides the
operating voltage to the bus. Both on-site as well as remote operation are possible.
The complete measuring system consists of:
System integration via Foundation Fieldbus
A maximum of 32 transmitters (standard, EEx em or EEx d) can be connected to the bus. For
protection class EEx ia IIC: the max. number of transmitters depends on the established rules and
standards for intrinsically safe circuits (EN 60070-14), proof of intrinsically safety. Both on-site as
well as remote operation are possible. The complete measuring system consists of:
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Micropilot M
Endress+Hauser 5
System integration via Rackbus
Multiple transmitters Micropilot M (or other instruments) can be connected to a higher-level bus
system via a Gateway ZA:
•Every HART transmitter via one interface module FXN 672 each.
•Gateways are available for MODBUS, FIP, PROFIBUS, INTERBUS etc.
•Both on-site as well as remote operation are possible.
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Micropilot M
6Endress+Hauser
Input
Measured variable The measured variable is the distance between a reference point (refer to fig. on page 2) 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.
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.
1) Treat Ammonia NH3 as a medium of group A, i.e. always use a stilling well.
Measuring range depending on vessel type, conditions and product for Micropilot M
FMR 230 and FMR 231:
2) possible, i.e. with stilling well in bypass.
Product class DK (εr) Examples
A1.4 … 1.9 non-conducting liquids, e.g. liquefied gas 1)
B1.9 … 4 non-conducting liquids, e.g. benzene, oil, toluene, …
C4 … 10 e.g. concentrated acids, organic solvents, esters, aniline, alcohol,
acetone, …
D> 10 conducting liquids, e.g. aqueous solutions, dilute acids and alkalis
Product class Storage tank
(scarce
draining/filling)
Buffer tank
(continuous
draining / filling)
Tank with single stage
propeller agitator
Stilling well Bypass
Measuring range Measuring range Measuring range Measuring
range
Measuring
range
FMR 230: DN150
6"
DN200/250
8" / 10"
DN150
6"
DN200/250
8" / 10"
DN150
6"
DN200/250
8" / 10"
DN80…250
3"…10"
DN80…150
3"…6"
FMR 231: Rod antenna — Rod antenna — Rod antenna — — —
ADK(εr)=1.4…1.9 to use the stilling well (20 m / 67 ft) 20 m/67 ft 2)
BDK(εr)=1.9…4 10 m/33 ft 15 m/50 ft 5 m/16 ft 7.5 m/24 ft 4 m/13 ft 6 m/20 ft 20 m/67 ft 2)
CDK(εr)=4…10 15 m/50 ft 20 m/67 ft 7.5 m/24 ft 10 m/33 ft 6 m/20 ft 8 m/27 ft 20 m/67 ft 20 m/67 ft
DDK(εr)>10 20 m/67 ft 20 m/67 ft 10 m/33 ft 12.5 m/42 ft 8 m/27 ft 10 m/33 ft 20 m/67 ft 20 m/67 ft
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Micropilot M
Endress+Hauser 7
Measuring range depending on vessel type, conditions, and product for Micropilot M
FMR 240:
Product class Storage tank
(scarce draining/filling)
Buffer tank
(continuous draining / filling)
Tank with single stage propeller
agitator
Measuring range Measuring range Measuring range
FMR 240: 1½"
40mm
DN50
2"
DN80
3"
DN100
4"
1½"
40mm
DN50
2"
DN80
3"
DN100
4"
1½"
40mm
DN50
2"
DN80
3"
DN100
4"
ADK(εr)=1.4…1.9 to use the stilling well (20 m / 67 ft)
BDK(εr)=1.9…43 m /
10 ft
5 m /
16 ft
10 m /
33 ft
15 m /
50 ft
2 m /
7ft
2.5 m /
8ft
5 m /
16 ft
7.5 m /
25 ft
1 m /
3ft
1 m /
3ft
2 m /
7ft
3 m /
10 ft
CDK(εr)=4…10 6 m /
20 ft
10 m /
33 ft
15 m /
50 ft
20 m /
67 ft
3 m /
10 ft
5 m /
16 ft
7.5 m /
25 ft
10 m /
33 ft
1.5 m /
5ft
2 m /
7ft
3 m /
10 ft
5 m /
16 ft
DDK(εr)>10 9 m /
30 ft
15 m /
50 ft
20 m /
67 ft
20 m /
67 ft
5 m /
16 ft
7.5 m /
25 ft
10 m /
33 ft
12.5 m
/ 42 ft
2 m /
7ft
3 m /
10 ft
5 m /
16 ft
7 m /
23 ft
Product class Stilling well Bypass Wave Guide antenna
Measuring range Measuring range Measuring range
FMR 240: 1½" / 40mm …DN100
1½"…4"
DN50…100
2"…4" Wave Guide antenna
ADK(εr)=1.4…1.9 20 m/ 67 ft see pipe antenna depending
on pipe length,
max. 2.8 m (9.2 ft)
BDK(εr)=1.9…4 20 m/ 67 ft
CDK(εr)=4…10 20 m/ 67 ft 20 m/ 67 ft
DDK(εr)>10 20 m/ 67 ft 20 m/ 67 ft
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Micropilot M
8Endress+Hauser
Measuring conditions Note!
Please use FMR 230 respectively FMR 231 for boiling surfaces or in case of a tendency for
foaming.
The maximum measuring range of the FMR240 may decrease in case of heavy steam
development, depending on density, temperature and composition of the steam (-> please
use FMR 230 respectively FMR 231). Please use FMR 230 in stilling well for the
measurement of ammonia NH3.
•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.
•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. In order to guarantee the required accuracy in these cases,
it is recommended to position the zero-point at a distance (C) above the tank bottom
•In principle it is possible to measure up to the tip of the antenna. However, due to considerations
regarding corrosion and build-up, the end of the measuring range should not be chosen any
closer than 50 mm (2”) to the tip of the antenna.
•The smallest possible measuring range (B) depends on the antenna version.
•The tank diameter should be greater than (D), the tank height at least (H).
•Depending on its consistence, foam can either absorb microwaves or reflect them off the foam
surface. Measurement is possible under certain conditions.
B [m / inch] C [mm / inch] D [m / inch] H [m / ft]
FMR 230 / 231 > 0.5 / > 20 150…300 / 6…12 > 1 / > 40 > 1.5 / > 5
FMR 240 > 0.2 / > 8 50…150 / 2…6 > 0.2 / > 8 > 0.3 / > 1
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Micropilot M
Endress+Hauser 9
Output
Output signal •4…20 mA with HART protocol
•PROFIBUS-PA
•Foundation Fieldbus (FF)
Signal on alarm Error information can be accessed via the following interfaces:
•Local display:
–Error symbol (see page 27)
–Plain text display
•Current output
•Digital interface
Auxiliary energy
Electrical connection Terminal compartment
Two housings are available:
•Housing F 12 with additionally sealed terminal compartment for standard or EEx ia
•Housing T 12 with separate terminal compartment for standard, EEx e or EEx d.
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Micropilot M
10 Endress+Hauser
Terminal assignment 4…20 mA with HART
The 2-wire cable is connected to the screw
terminals (wire diameter 0.5…2.5mm) in the
terminal compartment.
Use 2-wire twisted pair cable with screen for
the connection.
Protective circuitry against reverse polarity,
RFI, and over-voltage peaks is built into the
device (refer to TI 241F »basics for EMC-
tests«).
Terminal assignment PROFIBUS-PA
The digital communication signal is transmitted
to the bus via a 2-wire connection. The bus also
provides the auxiliary energy.
Please use 2-wire twisted pair cable with
screen.
Hints regarding architecture and grounding of
the network can be found in BA 198F
»projecting hints PROFIBUS-PA«and the
specification for PROFIBUS-PA.
Terminal assignment Foundation Fieldbus
The digital communication signal is transmitted
to the bus via a 2-wire connection. The bus
also provides the auxiliary energy.
Please use 2-wire twisted pair cable with
screen. Further cable specifications can be
found in the FF specification or the
IEC 61158-2.
Further hints regarding architecture and
grounding of the network can be found at the
Internet address »http://www.fieldbus.org«.
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