Extech Instruments MO55 User Manual

MO55‐en‐GB_V1.002/16
4
Operation

OperatingSteps
1. Forpinmode,carefullyremovetheprotective/testcaptoexposetheelectrodepins.
2. SwitchthemeterONbylongpressofthe
button.Themeteremitsaudibletonesandthe
displayswitchesonwhenthemeterpowersup.Ifthemeterdoesnotswitchonpleasecheck
thebatteryintherearcompartment.
3. MomentarypressesoftheMode(M)buttonstepthroughthefollowingfourmaterialmodes:
Wood‐Pinmode
,BuildingMaterial‐Pinmode ,Wood‐Pinlessmode(iconblinking)
,andBuildingMaterial‐Pinlessmode(iconblinking) .
4. Forpinmode,pushtheelectrodepinsintothematerialundertest.
5. Forpinlessmode,withpoweron,holdthemeterinopenair
(rearsensorshouldbeclearofhandsandanyobjects)andthen
selectmaterial(step3);themeterisnowzero‐calibrated.Press
the
sensorfirmlyagainstthesurfaceundertesttotakea
reading.
6. Observethedisplayedreadinginpercent(%),viewthedisplayedmoisturedropleticon

andlistenfortheaudibletones.
1moisturedropletforlowreadings;2formediumreadings;3forhighreadings;refertothe
chartonthebackofthemeter.Listenfortheaudibletone(fastbeepingforhigherreadings
andslowbeepingforlowerreadings).Thereareeight(8)tone
variations.
7. Longpressofthepowerbuttonswitchesthemeteroff.
MeasurementInterpretationTable
 PINMODE PINLESSMODE
WOOD(%) BUILDING
MATERIAL(%)
WOOD(%) BUILDING
MATERIAL(%)
TOTALRANGE> 5.0~50.0 1.5~33.0 0.0~99.9 0.0~99.9

LOW
5.0~11.9 1.5~16.9 0.0~16.9 0.0~16.9

MEDIUM
12.0~15.9 17.0~17.9 17.0~29.9 17.0~29.9

HIGH
16.0~50.0 20.0~33.0 30.0~99.9 30.0~99.9
AutoPowerOFF(APO)
Toconservebatteryenergythemeterautomaticallyswitchesoffafteratwo‐minuteperiodof
inactivity.
CAUTION:Theelectrodemeasurementpinsareextremelysharp.Usecarewhen
handlingthisinstrument.Coverthepinswiththeprotectivecapwhennotinuse.
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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