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Replacing filter of air temperature and

humidity sensor

Screwdriver Torx 10

1

2

3

1

Air temperature and humidity sensor

2

Probe body

3

Filter

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.

Reference Guide

M212309EN-C

4

Summary of Contents for MD30

Page 1: ...e air temperature and humidity sensor As needed Replace surface temperature sensor As needed For MD30 instructions including documents and videos see https www vaisala com en support md30 M212309EN C...

Page 2: ...on the vehicle When cleaning remove possible dirt ice and snow 2 3 1 1 Remove the hood by turning it counterclockwise 2 Apply glass cleaner on the window of the surface state sensor Clean with a soft...

Page 3: ...onditions 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 c...

Page 4: ...ith 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...

Page 5: ...re 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 replac...

Page 6: ...mperature sensor 2 Screw 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...

Page 7: ...bile Detector MD30 Setup Guide Road surface type in area of operation differs significantly from road surface type in location where dry road reference was performed Plate was not clean and dry during...

Page 8: ...us 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 err...

Page 9: ...ontamination warning 2 0 OK 1 Contaminated Window is getting contaminated Clean the window 4 Window heating 0 OK 1 Not working If heating is not working monitor window contamination 5 Low input voltag...

Page 10: ...face layer thickness results 0 False 1 True Unit operational but measurement data may be invalid Verify installation and clean window 15 31 Reserved for future use 1 Bit is shown in MD30 interface res...

Page 11: ...erence plate MDPLATE Splitter for car power outlet 260028 Mobile phone USB charger 256824 Mobile phone USB C charging cable 3 m 9 ft 8 in 258180 Mobile phone holder 256791 Mobile phone SIM not include...

Page 12: ...ntenance 1 Clean surface temperature sensor Cleaning surface temperature sensor page 3 2 Replace filter of air temperature and humidity sensor Replacing filter of air temperature and humidity sensor p...

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