Lufft MARWIS User manual

Operating Manual MARWIS-UMB / STARWIS-UMB English
© G. Lufft Mess- und Regelte hnik GmbH, Fellba h, Germany. Subje t to hange without noti e.

MARWIS-UMB / STARWIS-UMB Operating Manual V 3.3 / 9 De 2019
Contents
1 Read before use............................................................................................................................................ 6
1.1 Used symbols........................................................................................................................................ 6
1.2 Safety instru tions................................................................................................................................. 6
1.3 Designated use...................................................................................................................................... 6
1.4 In orre t use.......................................................................................................................................... 6
1.5 Guarantee.............................................................................................................................................. 6
1.6 Brand names......................................................................................................................................... 7
2 S ope of delivery ........................................................................................................................................ 7
3 Part numbers................................................................................................................................................. 7
3.1 MARWIS-UMB....................................................................................................................................... 7
3.2 A essories............................................................................................................................................ 8
3.3 Spare parts............................................................................................................................................ 8
3.4 Additional do uments and software....................................................................................................... 8
4 Equipment des ription................................................................................................................................... 9
4.1 Road surfa e temperature..................................................................................................................... 9
4.2 Ambient temperature............................................................................................................................. 9
4.3 Relative humidity2................................................................................................................................. 9
4.4 Dew point temperature........................................................................................................................... 9
4.5 Relative humidity at road temperature................................................................................................... 9
4.6 Water film height.................................................................................................................................. 10
4.7 Road ondition..................................................................................................................................... 10
4.8 I e per entage..................................................................................................................................... 10
4.9 Snow Height........................................................................................................................................ 10
4.10 Fri tion............................................................................................................................................... 10
4.11 Sensor te hnology MARWIS-UMB / STARWIS-UMB.........................................................................11
4.12 Status-LED........................................................................................................................................ 12
5 Generation of measurements ..................................................................................................................... 12
5.1 Current measurement (a t).................................................................................................................. 12
6 Operation modes......................................................................................................................................... 13
6.1 Normal operation................................................................................................................................. 13
7 Measurement output.................................................................................................................................... 14
7.1 Measurements..................................................................................................................................... 14
7.1.1 Road Surfa e Temperature..........................................................................................................14
7.1.2 AmbientTemperature.................................................................................................................... 14
7.1.3 Relative Humidity4....................................................................................................................... 14
7.1.4 Dew point temperature................................................................................................................ 14
7.1.5 Relative humidity at road temperature.........................................................................................15
7.1.6 Water film height.......................................................................................................................... 15
7.1.7 Water film height on smooth surfa e............................................................................................15
7.1.8 Road ondition............................................................................................................................. 15
7.1.9 I e per entage............................................................................................................................. 16
7.1.10 Snow Height.............................................................................................................................. 16
7.1.11 Fri tion....................................................................................................................................... 16
7.2 Additional sensor information............................................................................................................... 17
7.2.1 Devi e status............................................................................................................................... 17
7.2.2 Measurement status.................................................................................................................... 17
8 Mounting...................................................................................................................................................... 19
8.1 Hints for mounting MARWIS-UMB....................................................................................................... 19
8.2 Hints for mounting STARWIS-UMB...................................................................................................... 19
8.3 Mounting height................................................................................................................................... 19
8.3.1 8900.U03, Mounting with short prote tive housing, angle 20º.....................................................19
8.3.2 8900.U04, Mounting with short prote tive housing, angle 20º.....................................................19
8.3.3 8900.U05, Mounting with short prote tive housing, angle 20º.....................................................20
8.3.4 8900.U03, Mounting with long prote tive housing, angle 10º......................................................20
8.3.5 8900.U04, Mounting with long prote tive housing, angle 10º......................................................20
8.3.6 8711.U55, Mounting with short prote tive housing, angle 20º......................................................20
8.4 Prote tive housing............................................................................................................................... 22
G. Lufft Mess-und Regelte hnik GmbH iii

Operating Manual V 3.3 / 9 De 2019 MARWIS-UMB / STARWIS-UMB
8.4.1 Conne ting the MARWIS-UMB / STARWIS-UMB to the prote tive housing................................22
8.5 Example: Mounting with magneti bar arrier for horizontal installation and short prote tive housing.27
8.6 Example: Mounting with magneti bar arrier for verti al installation and long prote tive housing......28
8.7 Mounted orre tly?.............................................................................................................................. 28
9 Conne tions................................................................................................................................................. 29
9.1 Conne tion plug................................................................................................................................... 29
9.2 Pin assignment.................................................................................................................................... 29
9.3 Supply voltage..................................................................................................................................... 30
9.4 RS485-interfa e................................................................................................................................... 30
9.5 Bluetooth onne tion........................................................................................................................... 30
10 Commissioning.......................................................................................................................................... 31
10.1 Adaption of the sensor....................................................................................................................... 31
10.1.1 Possible reasons why an adaption may fail...............................................................................31
10.2 Sele ting the settings for the road ondition model...........................................................................31
10.2.1 Illustration of how the road ondition is determined...................................................................32
10.3 Important hints prior to ommissioning.............................................................................................. 33
11 Carrying out the sensor adaption............................................................................................................... 34
11.1 Adaption with the MARWIS-App......................................................................................................... 34
12 Configuration and test................................................................................................................................ 34
12.1 Fa tory Settings................................................................................................................................. 34
13 Firmware Update....................................................................................................................................... 35
13.1 Update with the MARWIS-App or ConfigTool.Net..............................................................................35
14 Maintenan e.............................................................................................................................................. 35
14.1 Cleaning the sensor front glass pane.................................................................................................35
14.2 Che king the bolted onne tions......................................................................................................35
15 Te hni al Data........................................................................................................................................... 36
15.1 Devi e................................................................................................................................................ 36
15.2 Measuring Range / A ura y............................................................................................................. 37
15.2.1 Road Surfa e Temperature........................................................................................................ 37
15.2.2 Road Condition.......................................................................................................................... 37
15.2.3 Dew point temperature...............................................................................................................37
15.2.4 Water film................................................................................................................................... 37
15.2.5 Relative humidity at road temperature.......................................................................................37
15.2.6 Relative humidity....................................................................................................................... 38
15.2.7 Ambient temperature11.............................................................................................................. 38
15.2.8 Fri tion....................................................................................................................................... 38
15.2.9 I e per entage........................................................................................................................... 38
15.2.10 Snow Height............................................................................................................................ 38
15.3 Drawings............................................................................................................................................ 39
15.3.1 MARWIS-UMB / STARWIS-UMB with short prote tive housing.................................................39
15.3.2 MARWS-UMB with long prote tive housing...............................................................................40
16 De laration of Conformity.......................................................................................................................... 42
16.1 EC Certifi ate of Conformity.............................................................................................................. 42
16.2 FCC Complian e statement (US)......................................................................................................42
16.3 IC Complian e statement (CA).......................................................................................................... 43
17 Disturban es.............................................................................................................................................. 44
17.1 Possible errors o urring on the MARWIS-UMB / STARWIS-UMB...................................................44
17.2 Interfering fa tors whi h an influen e the measurement result........................................................44
18 Disposal..................................................................................................................................................... 45
18.1 Within the EU..................................................................................................................................... 45
18.2 Outside the EU.................................................................................................................................. 45
19 Repair / Corre tive Maintenan e............................................................................................................... 45
19.1 Te hni al Support.............................................................................................................................. 45
20 Appendix.................................................................................................................................................... 46
20.1 Channel List Summary....................................................................................................................... 46
20.2 Communi ation in binary proto ol......................................................................................................47
20.2.1 Framing...................................................................................................................................... 48
20.2.2 Addressing with Class and Devi e ID........................................................................................48
iv G. Lufft Mess-und Regelte hnik GmbH

MARWIS-UMB / STARWIS-UMB Operating Manual V 3.3 / 9 De 2019
20.2.3 Example for reating addresses................................................................................................49
20.2.4 Example online data query........................................................................................................ 49
20.2.5 Example online data query multiple hannels............................................................................50
20.2.6 Example online data query multiple hannels V1.1...................................................................50
20.3 CAN Proto ol (Version 1.0)................................................................................................................ 52
20.3.1 General remarks........................................................................................................................ 52
20.3.2 Pin assignment.......................................................................................................................... 52
20.3.3 CAN-Parameter......................................................................................................................... 52
20.3.4 Data format and byte order in the ommuni ation proto ol........................................................52
20.3.5 Data transmission...................................................................................................................... 52
20.3.5.1 CAN-ID.............................................................................................................................. 52
20.3.5.2 Transmission format..........................................................................................................53
20.3.6 Remote Query........................................................................................................................... 53
20.3.7 Configuration of a trigger........................................................................................................... 53
20.3.7.1 CAN-ID.............................................................................................................................. 53
20.3.7.2 Trigger format.................................................................................................................... 54
20.3.8 Status and error odes............................................................................................................... 55
20.3.9 Data types.................................................................................................................................. 56
Subje t index.................................................................................................................................................. 57
G. Lufft Mess-und Regelte hnik GmbH v

MARWIS-UMB Operating Manual V 3.3 / 9 De 2019
1 Read before use
Please read this Operating Manual arefully and keep it handy for future referen e. Please note
that various omponents of the sensor and the des ribed software may look somewhat different
from those shown in the illustrations in this operating manual.
1.1 Used symbols
Important information about potential hazard to the user
Important information on erning the orre t operation of the equipment
1.2 Safety instructions
•Installation and ommissioning must only be arried out by suitably qualified spe ialist
personnel.
•Never take measurements on or tou h live ele tri al parts.
•Pay attention to the te hni al data, storage and operating onditions.
1.3 Designated use
•The equipment must only be operated within the range of the spe ified te hni al data.
•The equipment must only be used under the onditions and for the purpose for whi h it
was designed.
•The equipment must not be modified or altered in its onstru tion; otherwise, operation-
al safety and orre t fun tioning annot be guaranteed.
1.4 Incorrect use
If the equipment is not orre tly installed
•it may fun tion in a limited way or not fun ion at all
•it may entail a risk of injury by falling down
Note: he driver is liable for securing his vehicle's load.
If the equipment is not orre tly onne ted
•it may not fun tion
•it may be permanently damaged
•it may entail the risk of an ele tri al sho k
1.5 Guarantee
The guarantee applies for 24 months from date of delivery. The guarantee will not apply if the
designated use is violated.
6 Chapter 1, Read before use

Operating Manual V 3.3 / 9 De 2019 MARWIS-UMB
1.6 Brand names
All brand names referred to are subje t without limitation to the valid trademark and ownership
rights of the respe tive owner.
2Scope of delivery
The delivery ontains the following omponents:
MARWIS-UMB /
STARWIS-UMB
Cable / Plug
Conne tion ables and plugs have to be ordered seperately. You
will find the part numbers in hapter 3.2 A essories or on our
homepage www.lufft. om
Prote tive housing
In order to prote t the MARWIS-UMB / STARWIS-UMB from
pollution it has to be used in any ase with one of the two
available prote tive housings. The respe tive prote tive housing
has to be ordered seperately.
The part numbers will be found in hapter 3.2 A essories or on
our homepage www.lufft. om.
Operating Manual
3 Part numbers
3.1 MARWIS-UMB
8900.U03..............MARWIS-UMB for 1 m (3 ¼ ft) measuring distan e to the ground
8900.U04..............MARWIS-UMB for 2 m (6 ½ ft) measuring distan e to the ground
8900.U05..............MARWIS-UMB for 0.5 m (1 ¾ ft) measuring distan e to the ground
8711.U55...............STARWIS-UMB for 5.5 m (18 ft) measuring distan e to the ground
Chapter 3, Part numbers 7
Illustration 1: Marwis-UMB / Starwis-UMB

MARWIS-UMB Operating Manual V 3.3 / 9 De 2019
3.2 Accessories
Prote tive housing short (re ommended for mounting on passenger ar)..............8900.G01
Prote tive housing long (re ommended for mounting on lorry)...............................8900.G02
Assembly kit magneti bar arrier (horizontal)......................................................8900.G01H
Assembly kit magneti bar arrier (verti al)..........................................................8900.G01V
Additional magneti fastener for 8900.G01H or 8900.G01V.................................8900.G01M
Conne tion able, 15 m (49 ¼ ft) .......................................................................8371.UK015
Conne tion able, 5 m (16 ⅜ ft) with 12V ar adapter for igarette lighter............8900.UK05
Plug without able1................................................................................................ 8371.UST1
Mast lamp in l. short prote tive housing for STARWIS-UMB
for mast with diameter 60 – 80 mm (2 ⅜ – 3 ¼ in).................................................8711.UMB
3.3 Spare parts
Temperature humidity sensor..............................................................8900.UTFF
3.4 Additional documents and software
You an download the following do uments and software from the internet on www.lufft. om:
•Operating Manual......................this do ument
•UMB-Proto ol...............Communi ation proto ol for UMB devi es
•Firmware......................latest firmware for the equipment
MARWIS App for iOS operating systems an be downloaded from iTunes. The MARWIS-App for
Android is available in Google Playstore.
1 Communi ation has been tested at a maximum able length of 15m (49 ¼ ft) with a bit rate of 115200 baud
8 Chapter 3, Part numbers

Operating Manual V 3.3 / 9 De 2019 MARWIS-UMB
4 Equipment description
In a ordan e with the demands on road traffi meteorologi al network sensors are mounted on
vehi les. MARWIS-UMB for the dete tion of water, i e, snow and fri tion an be installed on
vehi les. The distan e between the sensor and the road must be either 0.5, 1 m or 2 m (1 ¾ ft ,
3 ¼ ft or 6 ½ ft). The STARWIS-UMB must be installed at a distan e of 5.5 m (18 ft) to the
ground.
The devi e works with infrared measuring. Four emitting and two re eiving diodes apture the
refle ting behaviour of the road surfa e at varying wave lengths. Due to the different spe tral
properties of various substan es – e.g. water and i e – the road state an be dedu ed from the
aptured values.
MARWIS-UMB delivers values for road temperature, dew point temperature, ambient
temperature and humidity, relative humidity at road temperature, water film height, road state,
i e per entage and fri tion. STARWIS-UMB delivers the same variables ex ept ambient
temperature and humidity.
With an in reasing number of i e parti les on the road surfa e the fri tion oeffi ient falls and
an thus be of important help when de iding about preventive gritting.
Due to the open interfa e proto ols, MARWIS-UMB as well as STARWIS-UMB an be easily
integrated into existing winter maintenan e monitoring networks. Similarly, MARWIS-UMB an
ommuni ate dire tly with the ontrol system of gritting vehi les.
The measurement data output supports the following proto ols: UMB binary.
4.1 Road surface temperature
The road surfa e temperature is measured with a non-invasive pyrometer whi h is fullly
integrated into the sensor.
4.2 Ambient temperature2
The ambient temperature is the air temperature whi h is measured by the sensor on the side of
the MARWIS-UMB.
4.3 Relative humidity2
Relative humidity indi ates the degree to whi h the air is saturated with water vapour. It hanges
with temperature sin e hot air an absorb more vapour than old air.
4.4 Dew point temperature
The dew point temperature is the temperature where the urrent partial water vapour pressure
equals the saturated vapour pressure, whi h means that ondensation sets in e.g. in the form of
fog.
4.5 Relative humidity at road temperature
The al ulation of the relative humidity at road temperature is based on the absolute humidity
and the road temperature. It an be used as an indi ator for impending formation of dew or
hoarfrost.
2 Only MARWIS-UMB
Chapter 4, Equipment des ription 9

MARWIS-UMB Operating Manual V 3.3 / 9 De 2019
4.6 Water film height
The water film height on the road surfa e is measured with a non-invasive opti al spe tros opy.
The water film height is the sum of liquid water and water equivalent of frozen water.
The sensor gives both the water film height on smooth surfa e and the water film height, whi h
takes into a ount the water in the pores of the road surfa e. Via surfa e type (asphalt,
on rete) you determine, whi h amount of water must be onsidered in the pores.
4.7 Road condition
The road ondition is determined from the measurement of water film height, road surfa e
temperature and i e per entage. The sensor dedu es the road onditions of dry, damp, wet,
snow / i e, hemi al wetness and water + i e.3 .
The values whi h are supposed to be used in the al ulation of the road ondition an be set,
e.g. highest, lowest or average road temperature of the last overed road se tion. For this
purpose, predefined settings are available for sele tion.
4.8 Ice percentage
With the data from the opti al spe tros opy the frozen part of the aqueous solution on the road
is determined and delivered as i e per entage.
4.9 Snow Height
The sensor dete ts the snow height in the field of measurement.
Note: he snow height is an additional information and it is not part of the water equivalent.
4.10 Friction
Fri tion des ribes the adhesion of tyres on the road surfa e. This an be redu ed due to ambi -
ent onditions su h as rain or snow. The value of the fri tion is s aled between 0.1 and 1.0. High
values indi ate high adhesion, low values stand for low adhesion. The highest value (1.0) will be
a hieved when the road is dry whereas the lowest result (0.1) will ome up with water on i e.
Note: The grip of a road is determined basi ally by the texture of its surfa e. The fri tion value of
the MARWIS-UMB / STARWIS-UMB indi ates to whi h degree the maximum possible grip of a
spe ifi road is rea hed, respe tively how mu h it has been redu ed by ambient onditions.
Therefore, identi al fri tion values of the MARWIS-UMB / STARWIS-UMB on different road
surfa es mean different grip.
3 The road ondition model is subje t to onstant improvement. Please he k regularly on the availability of firmware updates.
10 Chapter 4, Equipment des ription

Operating Manual V 3.3 / 9 De 2019 MARWIS-UMB
4.11 Sensor technology MARWIS-UMB / S ARWIS-UMB
Chapter 4, Equipment des ription 11
Illustration 2: MARWIS-UMB / STARWIS-UMB Components
Abbildun 3: Lateral temperature
sensor (only MARWIS-UMB)

MARWIS-UMB Operating Manual V 3.3 / 9 De 2019
4.12 Status-LED
The devi e is equipped with a status LED whi h indi ates the urrent state of the MARWIS-UMB
/ STARWIS-UMB. A blinking LED in any olour means that UMB data transfer is taking pla e
through RS485 or Bluetooth.
Meaning of the LED olours:
Colour Description
Green Devi e status OK, infrared measurement a tive
Blue Devi e status OK, infrared measurement a tive, a tive Bluetooth onne tion
Yellow
Devi e status OK, Error in infrared measurement
(e.g. operating temperature has not yet been rea hed in the warm up phase)
The status hannel ”measurement status“ provides detailed information about
the nature of the error.
Magenta Firmware update a tive; Don't separate sensor from power supply!
Red
Devi e error
The status hannel “devi e status“ provides detailed information about the
nature of the error.
Blinking Data transfer is taking pla e.
The status of the devi e and the measurement an also be retrieved on UMB hannels 4000
and 4001. The orresponding des ription an be found in hapter Fehler: Referenz ni ht
gefunden Fehler: Referenz ni ht gefunden on page Fehler: Referenz ni ht gefunden
5 Generation of measurements
5.1 Current measurement (act)
In a ordan e with the spe ified sampling rate, the value of the last measurement is transmitted
when the urrent measurement value is requested.
In order to suppress disturban es whi h an o ur in a mobile operation the measured values in
the MARWIS-UMB / STARWIS-UMB are filtered over a onfigurable period of time. Examples
for disturban es whi h an influen e the result are des ribed in hapter 17.2, on page 44 of this
do ument.
12 Chapter 5, Generation of measurements

Operating Manual V 3.3 / 9 De 2019 MARWIS-UMB
6 Operation modes
6.1 Normal operation
The MARWIS-UMB / STARWIS-UMB is swit hed on and off by onne ting and dis onne ting
the power supply.
After being swit hed on it takes a starting time of about 10 se onds before the first measure-
ment values appear. Depending on the operating temperature and on the urrent ambient
temperature a warm up phase of 5 up to 15 minutes may be required before the first plausible
values appear. This period an be redu ed if the MARWIS-UMB STARWIS-UMB is powered
with 24 V (as opposed to 12 V). The state of readiness is indi ated by the status LED turning
green or blue respe tively in ase the Bluetooth onne tion is a tive. The meanings of the
status LED's olours are des ribed in hapter 4.12 on page 12.
Chapter 6, Operation modes 13

MARWIS-UMB Operating Manual V 3.3 / 9 De 2019
7 Measurement output
The measured values are delivered in the UMB binary proto ol. You an find an example for a
data retrieval and the omplete overview of the UMB hannels in the appendix.
7.1 Measurements
7.1.1 Road Surface emperature
Sampling rate........< 1 se ond
Units......................ºC; ºF
Channels:
UMB Channel Measurement variable (float32) Measuring range
min max unit
100 Road surfa e temperature -40.0 70.0 ºC
105 Road surfa e temperature -40.0 158.0 ºF
7.1.2 Ambient emperature4
Sampling rate........1 se ond
Units......................ºC; ºF
Channels:
UMB Channel Measurement variable (float32) Measuring range
min max unit
110 Ambient temperature -50.0 70.0 ºC
115 Ambient temperature -58.0 158.0 ºF
7.1.3 Relative Humidity4
Sampling rate........1 se ond
Units......................%
Channels:
UMB Channel Measurement variable (float32) Measuring range
min max unit
210 Relative humidity 0 100 %
7.1.4 Dew point temperature
Sampling rate........1 se ond
Units......................ºC; ºF
Channels:
UMB Channel Measurement variable (float32) Measuring range
min max unit
4 MARWIS-UMB only
14 Chapter 7, Measurement output

Operating Manual V 3.3 / 9 De 2019 MARWIS-UMB
120 Dew point temperature -50.0 60.0 ºC
125 Dew point temperature -58.0 140.0 ºF
7.1.5 Relative humidity at road temperature
Sampling rate........1 se ond
Units......................% r.h.
Channels:
UMB Channel Measurement variable (float32) Measuring range
min max unit
200 Relative humidity at road
temperature -0.0 100.0 %
7.1.6 Water film height
Sampling rate........100 Hz
Units......................µm, mil, mm
Channels:
UMB Channel Measurement variable (float32) Measuring range
min max unit
600 Water film height 0.0 6000.0 µm
605 Water film height 0.0 78.7 Mil
610 Water film height 0.0 6.0 mm
7.1.7 Water film height on smooth surface
Sampling rate........100 Hz
Units......................µm, mil, mm
Channels:
UMB Channel Measurement variable (float32) Measuring range
min max unit
601 Water film height on surfa e 0.0 6000.0 µm
606 Water film height on surfa e 0.0 78.7 Mil
611 Water film height on surfa e 0.0 6.0 mm
Channels 601, 606 and 611 do no onsider the water in the pores of the road surfa e.
7.1.8 Road condition5
Sampling rate........10 Hz
Units......................logi oding
Channels:
UMB Channel Measurement variable (uint8) Coding
5 The road ondition model is subje t to onstant improvement. Please he k regularly on the availability of firmware updates.
Chapter 7, Measurement output 15

MARWIS-UMB Operating Manual V 3.3 / 9 De 2019
900 Road ondition
0
1
2
3
4
5
6
8
99
dry
damp
wet
i e- overed
snow-/i e- overed
hemi ally wet
water + i e
snow- overed
undefined
dry: no liquid water on the road;
water film height below damp threshold
damp: liquid water on the road;
water film height below wet threshold
wet: liquid water on the road;
water film height on or above wet threshold
i e- overed: frozen water on the road mainly in the form of i e
snow- / i e- overed: frozen water on the road either in the form of i e or snow; a more
pre ise differentiation is not possible
hemi ally wet: the water film height is on or above the damp threshold and the road
surfa e temperature is below 1.5°C (34.7 °F); the formation of i e is
inhibited by the presen e of de-i ing hemi als
water + i e: water film height is on or above the damp threshold and the road
surfa e temperature is below 1.5°C (34.7 °F) with the formation of i e
parti les starting;
snow- overed: frozen water on the road mainly in the form of snow
7.1.9 Ice percentage
Sampling rate........10 Hz
Units......................%
Channels:
UMB Channel Measurement variable (float32) Measuring range
min max unit
800 I e Per entage 0.0 100.0 %
7.1.10 Snow Height
Sampling rate........10 Hz
Units......................mm
Channels:
UMB Channel Measurement variable (float32) Measuring range
min max unit
612 Snow Height 0.0 50 mm
7.1.11 Friction
Sampling rate........10 Hz
16 Chapter 7, Measurement output

Operating Manual V 3.3 / 9 De 2019 MARWIS-UMB
Units......................none
Channels:
UMB Channel Measurement variable (float32) Measuring range
min max unit
820 Fri tion 0.0 1.0 none
7.2 Additional sensor information
The sensor delivers more information about its state and fun tioning.
7.2.1 Device status
UMB channel Measurement variable (uint16)
4000 Devi e status
Bit 0 RESERVED
Bit 1 Supply voltage status 0 Supply voltage in range
1 Low voltage dete ted
Bit 2 Flash status 0 Flash OK
1 Error on reading / writing to onboard flash
Bit 3 NIR status
0 NIR measurement OK
1Error in NIR measurement
(see UMB Channel 4001 for details)
Bit 4 Pyro status 0 Pyro measurement OK
1 Error in pyrometer measurement
Bit 5 TFF status 0 TFF (t/h.r.) measurement OK
1 Error in TFF (t/h.r.) measurement
Bit 6 Heater temperature
measurement status
0 Internal heater temp. measurement OK
1Error measuring heater temperature
(Heating will be disabled)
Bit 7 RS485 status 0 RS485 ommuni ation OK
1 Error in RS485 ommuni ation
Bit 8 Bluetooth status 0 Bluetooth module up and running
1 Error on Bluetooth ommuni ation
Bit 9 - 15 RESERVED
7.2.2 Measurement status
UMB channel Measurement variable (uint16)
4001 Measurement status
Bit 0 Operating temperature 0 Devi e temperature in operating range
1 Invalid operating temperature (status LED: orange)
Bit 1 NIR timeout 0 NIR measurement OK
1 Timeout error during NIR measurement
Bit 2 Monitor error 0 Monitor measurement OK
Chapter 7, Measurement output 17

MARWIS-UMB Operating Manual V 3.3 / 9 De 2019
1 Error at monitor measurement (LED defe tive)
Bit 3 NIR measurement 0 NIR measurement ok
1 NIR measurement invalid6
Bit 4 – 7 RESERVED
Bit 8 Invalid adjustment
profile
0 Adjustment profile valid
1Invalid adjustment profile sele ted; WFH measurement
impossible
Bit - - 14 RESERVED
Bit 15 General error 0 No error
1 Unspe ified, general error
6 A value is re ognized as invalid e.g. if an obsta le is under the STARWIS-UMB
18 Chapter 7, Measurement output

Operating Manual V 3.3 / 9 De 2019 MARWIS-UMB
8 Mounting
8.1 Hints for mounting MARWIS-UMB
The mounting of the MARWIS-UMB on the vehi le must be fit to be used on the road.
The prote tive housings 8900.G01 and 8900.G02 are supposed to prote t the sensor from tur-
bulen es and dirt whi h ould impair the measurement. They do not affe t the measuring dis -
tan e whi h has to be measured in any ase between the sensor fa e and the road.
It has to be made sure that the field of view of the MARWIS-UMB is dire ted to the road and not
interrupted by vehi le parts. The zone that would be overed if the side parts of the prote tive
housing were extended down to the road should be free of obsta les. The in lination angle of
the MARWIS-UMB towards the road must orrespond to the one whi h is given by the prote tive
housing (see illustrations in hapter 15.3).
The MARWIS-UMB should be installed in a way that ensures it annot be affe ted by heat from
the exhaust fumes of the vehi le.
It should be avoided installing the MARWIS-UMB straight above the tyres tra k sin e in this
position the risk of spume soiling the glass front of the MARWIS-UMB is elevated whi h ould in
turn affe t the measurement of the water film height.
8.2 Hints for mounting S ARWIS-UMB
STARWIS-UMB is supposed to be fixed stationary to a mast, sign gantry or similar. Lufft offers
the short prote tive housing together with a lamp for fixing it to pipes of 60 – 80 mm (2 ⅜ – 3 ¼
in) in diameter. Make sure that the view field of the STARWIS-UMB is dire ted towards the spot
whi h is supposed to be measured on the road and that the view line is not interrupted by any
obsta le.
8.3 Mounting height
The measuring distan e of 1 m or 2 m (3¼ ft or 6½ ft) and 5.5 m (16 ⅜ ft) for the 2 MARWIS-
UMB types and the STARWIS-UMB respe tively refer to the distan e from the sensor front
(glass) to the road. This measuring distan e should be observed as exa tly as possible. The
toleran e whi h still allows for plausible measurement values amounts to -20 m / +50 m (-8
in / + 19¾ in) in ase of instrument 8900.U03, -40 m / +20 m (-15¾ in / +8 in) for instrument
8900.U04 and ± 50 m (19 ¾ in) for the stationary 8711.U55. If the STARWIS-UMB is mounted
on a mast, the distan e of the mast to the measuring spot has to be taken into onsideration. A
more detailed des ription will follow in the next hapters.
8.3.1 8900.U03, Mounting with short protective housing, angle 20º
Minimal height..........75 m...(29 ½ in)..............measuring distan e .......80 m. .(31 ½ in)
Ideal height..............96 m...(37 ¾ in)..............measuring distan e .....100 m. .(39 ⅜ in)
Maximum height.....141 m...(55 ½ in)..............measuring distan e .....150 m......(59 in)
8.3.2 8900.U04, Mounting with short protective housing, angle 20º
Minimal height........150 m.......(59 in)..............measuring distan e......160 m......(63 in)
Ideal height............188 m.......(74 in)..............measuring distan e .....200 m. .(78 ¾ in)
Maximum height.....207 m...(81 ½ in)..............measuring distan e .....220 m. .(86 ⅝ in)
Chapter 8, Mounting 19

MARWIS-UMB Operating Manual V 3.3 / 9 De 2019
8.3.3 8900.U05, Mounting with short protective housing, angle 20º
Minimal height..........33 m.......(13 in)..............measuring distan e .......35 m. .(13 ¾ in)
Ideal height..............47 m. .(18 ½ in)..............measuring distan e .......50 m. .(19 ¾ in)
Maximum height.......61 m.......(24 in)..............measuring distan e .......65 m. .(25 ⅝ in)
8.3.4 8900.U03, Mounting with long protective housing, angle 10º
Minimal height..........79 m...(31 ⅛ in)..............measuring distan e .......80 m. .(31 ½ in)
Ideal height..............98 m...(38 ⅝ in)..............measuring distan e .....100 m. .(39 ⅜ in)
Maximum height.....148 m...(58 ½ in)..............measuring distan e .....150 m......(59 in)
8.3.5 8900.U04, Mounting with long protective housing, angle 10º
Minimal height........157 m...............................measuring distan e .....160 m......(63 in)
Ideal height............197 m...............................measuring distan e .....200 m. .(78 ¾ in)
Maximum height.....217 m...............................measuring distan e .....220 m. .(86 ⅝ in)
8.3.6 8711.U55, Mounting with short protective housing, angle 20º
Minimal height........470 m.....(185 in)..............measuring distan e .....500 m....(199 in)
Ideal height............517 m.....(204 in)..............measuring distan e .....550 m....(217 in)
Maximum height.....564 m.....(222 in)..............measuring distan e .....600 m....(236 in)
In ase of setting up a mast for the STARWIS-UMB make sure that its distan e to the spot whi h
is supposed to be measured allows a orre t arrangement of the STARWIS-UMB.
20 Chapter 8, Mounting
Illustration 4: 8900.U04 Mountin at an an le of 20°