Extech Instruments MO55 User Manual

MO55‐en‐GB_V1.002/16
2
Introduction
ThankyouforselectingtheExtechMO55PinandPinlessDualMoistureMeter.Thecompact
MO55takesquickMoisturelevelreferencemeasurements(inpercent%)onwoodandbuilding
materials.TheMO55canbeusedinpinlessmode(rearsensor)orinpinmode.TheMO55is
simpletooperateandoffersmeasurementdigits,audibletonesand‘moisturedrop’iconsto
indicatemoisturelevelcontent.

TheMO55isidealforbuildingrestorationprojectsandapplicationswheremoisturedetectionon
floorsandundercarpetsiscritical.TheMO55isagreattoolforanalyzingthe after‐effectsof
waterleakagebehindwalls
andinceilings.

Thismeterisshippedfullytestedandcalibratedand,withproperuse,willprovideyearsof
reliableservice.Pleasevisitourwebsite(www.extech.com)tocheckforthelatestversionofthis
UserGuide,ProductUpdates,ProductRegistration,andCustomerSupport.
Features
 Displaysthemoisturelevelinwoodandbuildingmaterials(wallboard,sheetrock,cardboard,
plaster,concrete,andmortar)
 Pinless(non‐invasive)orPinmodesofoperation
 AutozerocalibrationforPinlessmode
 Audibletoneratebeepsfasterasthemoisturelevelincreases(8tonevariations)
 ‘Moisture
drop’Iconsdisplaylow,mediumandhighlevelsofmoisturecontent
 Easy‐to‐use,compactdesign
 DisplayLockfreezesreadingondisplay
 AutoPowerOffafter2minutesconservesbatterypower
 Completewithextrapins(4),protectivecap,and9Vbattery

Shop for Extech products at:
1.877.766.5412
ShopExtech.com

Extech Instruments MO55 Specifications

Measurement Specifications

measurement depth pinless mode	< 25mm (1 in.)
measurement ranges pin mode	5.0~50.0% (wood), 1.4~33.0% (building materials)
measurement ranges pinless mode	0.0~99.9% (for wood and building materials)
resolution	0.1%
accuracy pin mode	± (3% + 5 digits) for ambient conditions 22°C to 25°C (72°F to 77°F)

Power

power supply	One (1) 9V Battery
auto power off	After approx. two (2) minutes
consumption	< 40mA

Operating Environment

operating conditions	5~45°C (41~113°F); 80%RH max.
storage conditions	0~50°C (32~122°F); 85%RH max.
low battery indication	Battery status icon appears empty or flashing

Weight and Dimensions

dimensions	170 x 65 x 30mm (6.7 x 2.6 x 1.2")
weight	120g (4.2 oz.) without battery