Vaisala MD30 User manual

MD30 maintenance
1
2
3
1Surface state sensor
2Surface temperature sensor MT10
3Air temperature and humidity sensor HMP113
Table 1 MD30 maintenance
Task Frequency
Preventive maintenance
Check error messages −
Clean surface state sensor window As needed
Clean surface temperature sensor Annually
Replace filter of air temperature and humidity sensor Annually
Perform 3-step calibration (clean, adjust with plate, drive on dry road) Annually
Repair maintenance
Replace air temperature and humidity sensor As needed
Replace surface temperature sensor As needed
For the MD30 spare parts and accessories, see Vaisala Mobile Detector MD30 Product Description
Reference Guide.
For MD30 instructions, including documents and videos, see
https://www.vaisala.com/en/support/md30.
M212309EN-D
Reference
Guide
Maintenance and Troubleshooting
Vaisala Mobile Detector MD30
PUBLISHED BY
Vaisala Oyj
Vanha Nurmijärventie 21
FI-01670 Vantaa, Finland
© Vaisala 2021
All rights reserved. Any logos and/or product names are trademarks of Vaisala or its individual partners.
Any reproduction, transfer, distribution or storage of information contained in this document is strictly
prohibited. All specifications — technical included — are subject to change without notice.

More information
‣Cleaning surface state sensor window (page 3)
‣Cleaning surface temperature sensor (page 4)
‣Replacing filter of air temperature and humidity sensor (page 5)
‣Replacing air temperature and humidity sensor (page 6)
‣Replacing surface temperature sensor (page 7)
‣MD30 troubleshooting (page 8)
‣Error bits (page 10)
‣Status information (page 12)
‣Recycling information (page 14)
‣MD30 maintenance checklist (page 15)
Safety information
Failure to comply with these precautions or with specific warnings elsewhere in these
instructions violates safety standards of design, manufacture, and intended use of the product.
Vaisala assumes no liability for the customer's failure to comply with these requirements.
WARNING!
Do not substitute parts or modify the system, or install unsuitable parts in the system.
Improper modification can damage the product or lead to malfunction.
WARNING!
Follow local and state legislation and regulations on occupational safety.WARNING!
Reference Guide M212309EN-D
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Cleaning surface state sensor window
•Cloth
•Glass cleaner
Clean the surface state sensor window when sensor gives a window contamination warning.
For cleaning, the mobile sensor can remain mounted on the vehicle. When cleaning, remove possible
dirt, ice, and snow.
2 31
1. Remove the hood by turning it counterclockwise.
2. Apply glass cleaner on the window of the surface state sensor. Clean with a soft, lint-free cloth.
Clean also the hood.
3. Attach the hood to the body by turning the hood clockwise.
Make sure that the markings in the hood and sensor body are aligned.
More information
‣MD30 maintenance (page 1)
‣MD30 maintenance checklist (page 15)
Reference Guide M212309EN-D
3

Cleaning surface temperature sensor
•Cotton swab
•Compressed air or air pump
•Glass cleaner
1
1Surface temperature sensor
Clean the surface temperature sensor annually, or more often if conditions require it.
1. Remove the surface temperature sensor from the body.
2. Apply glass cleaner on the surface temperature sensor. Insert a cotton swab in the thread and
turn it clockwise. Remove the cotton swab by turning it counterclockwise in the thread. If
required, use compressed air or an air pump.
3. Attach the surface temperature sensor to the body.
More information
‣MD30 maintenance (page 1)
‣MD30 maintenance checklist (page 15)
Reference Guide M212309EN-D
4

Replacing filter of air temperature and
humidity sensor
•Screwdriver Torx 10
1
2
3
1Air temperature and humidity sensor
2Probe body
3Filter
Replace the filter when it is damaged or dirty.
The replacement filter comes with an O ring, but do not use it.
1. Carefully remove the filter from the probe. Holding the filter by its collar, rotate the filter counter-
clockwise, then pull it out.
Do not touch the sensor heads.
CAUTION!
2. Without delay, install the new filter carefully on the air temperature and humidity sensor.
Rotate the filter clockwise, making sure the filter sits straight and meets the threads properly.
More information
‣MD30 maintenance (page 1)
‣MD30 maintenance checklist (page 15)
Reference Guide M212309EN-D
5

Replacing air temperature and humidity
sensor
•Electric joint compound
•Screwdriver Torx 10
2 31
1. Loosen the 4 screws that hold the temperature sensor in place, pull the air temperature and
humidity sensor (HMP) through the holder, and disconnect the sensor cable.
2. Add electric joint compound at the end of the connector of the replacement sensor.
Connect the sensor cable to the replacement sensor.
3. Remove the yellow cover from the replacement sensor.
4. Push the replacement sensor through the holder and attach the holder with 4 screws.
More information
‣MD30 maintenance (page 1)
‣MD30 maintenance checklist (page 15)
Reference Guide M212309EN-D
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Replacing surface temperature sensor
•Screwdriver Torx 10
1
2
1Surface temperature sensor
2Screw (4 pcs)
1. Loosen the 4 screws that hold the temperature sensor in place, remove the sensor, and
disconnect the sensor cable.
2. Connect the sensor cable to the replacement sensor.
3. Attach the replacement sensor with 4 screws.
More information
‣MD30 maintenance (page 1)
‣MD30 maintenance checklist (page 15)
Reference Guide M212309EN-D
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MD30 troubleshooting
LED information
In normal startup, the mobile sensor LED goes through the following states:
1. Orange: powered
2. Green (steady): starting
3. Green (blinking): operational
Normal startup takes approximately 10 seconds. In error situations, the LED stays orange or red.
Table 2 LED error states
Status LED Actions
Orange (steady): sensor
malfunction
Check the connections and power input.
If the problem persists, contact Vaisala.
Red (steady): system in
error state
Check the status information and error bits and act
on any open errors.
Checking error information
Check the status and error information from RoadAI or through the MD30 interface.
• In the RoadAI app:
• For sensor-related errors, scroll right in the measurement grid to see fields unit status and
error status.
• For phone-related errors, such as missing internet connection, open the sidebar and go to
Diagnostics.
• In the MD30 interface, use the SEND DATA message to check the status and error bits.
For detailed information about the error bits and status information, see Error bits (page 10) and
Status information (page 12).
Table 3 Troubleshooting
Problem Probable cause Actions
Installation and setup
Phone is not showing data. Device pairing was not successful
or system is not getting power.
Check that car charge adapter and
car phone charger are connected
and mobile sensor and mobile
phone are powered.
If pairing is still not successful,
repeat pairing.
Reference Guide M212309EN-D
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Problem Probable cause Actions
Installation was verified with
reference plate and mobile sensor
adapted to road surface types, but
mobile sensor gives inaccurate
readings.
Road was not completely dry
when dry road reference was
performed.
Carry out dry road reference
again. See Vaisala Mobile Detector
MD30 Setup Guide.
Road surface type in area of
operation diers significantly from
road surface type in location
where dry road reference was
performed.
Plate was not clean and dry during
plate calibration.
Carry out plate reference. See
Vaisala Mobile Detector MD30
Setup Guide.
Plate was not positioned correctly
during plate calibration.
Calibration stops or does not
succeed.
There is an active error. Check status and error
information, and act on any open
errors.
Dry road not available. − Type the values manually or use
factory settings until local dry
road becomes available.
Operation
System is in error state (mobile
sensor LED is red).
Several possible causes. Restart mobile sensor.
If the error persists, see error
messages for more information.
Phone is not showing data. System is not getting power. Check that car charge adapter and
car phone charger are connected
and mobile sensor and mobile
phone are powered.
Phone does not upload data to
network.
Phone battery level is < 85 % and
phone is not connected to charger.
Connect phone to charger.
No network connection. Check Internet connection
settings. Check that SIM card is
inserted.
Change location.
Phone SD card is empty. Data has been uploaded to server. −
More information
‣Error bits (page 10)
‣Status information (page 12)
Reference Guide M212309EN-D
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Error bits
Error bits indicate error situations in the unit or in communication. The erroneous bits are reported in
the GET UNIT STATUS, SEND DATA, and SET REFERENCES messages.
Error is indicated by setting bit to 1.
Table 4 Error messages
Bit 1) Message Probable cause Actions
0 Surface temperature sensor
error
Cables may be loose,
damaged, or disconnected.
Check cables and connectors.
If the problem persists, replace
mobile sensor.
1 Air temperature error
2 Relative humidity error
3 Window contamination alarm
2)
Mobile sensor window is
heavily contaminated.
Clean the window.
4 Laser status error - Restart mobile sensor.
5 Laser heating error
6 Excessive ambient light
detected
Sunlight is reflected from road
surface to mobile sensor.
Move vehicle or reposition
mobile sensor.
7 Receiver error − Restart mobile sensor.
8 Signal level out of range, gain
adjustment limit reached
− Check installation height and
angle of mobile sensor.
9 Received signals contain too
much noise
− Check that mobile sensor is
firmly attached to vehicle.
10 Optical measurement data
timeout
− Restart mobile sensor.
11 Low input voltage Incorrect operating voltage. Check operating voltage.
12 High input voltage
13 Flash failure status - Restart mobile sensor.
14 Internal temperature too high Mobile sensor overheated. Disconnect mobile sensor from
power supply.
15 Reference status:
0= OK
1= Invalid or not set
− Verify installation with
reference plate and adapt
mobile sensor to road surface
types.
16 Factory calibration status:
0= OK
1= Not calibrated
− Return mobile sensor to
Vaisala.
17-31 Reserved for future use − −
1) Bit is shown in MD30 interface response data message, not in RoadAI.
2) Reported by MD30 models that have the window contamination feature.
Reference Guide M212309EN-D
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