User manual

User's Guide
Moisture Detector Model MO100
Introduction
Congratulations on your purchase of the Extech MO100 Moisture Detector.
Readings are made by inserting the pins into the material being measured.
Careful use of this meter will provide years of reliable service.
Cautions
• This device is not a toy and must not reach children’s hands. It contains
hazardous objects as well as small parts that the children could swallow.
In case a child swallows any of them, please contact a physician
immediately
• Do not leave batteries and packing material lying around unattended; they
can be dangerous for children if they use them as toys
• In case the device is going to be unused for an extended period of time,
remove the batteries to prevent them from training
• Expired or damaged batteries can cause cauterization on contact with the
skin. Always, therefore, use suitable hand gloves in such cases
• See that the batteries are not short-circuited. Do not throw batteries into
the fire.
Specifications
Display Two LCD displays Operating
%RH
90% Relative Humidity (max.)
Display Range 0 to 100 Power Two (2) AAA batteries
°C/ °F Range 0°C to 50°C (32°F to
122°F )
Dimensions 192 x 30 x 45 mm (7.6 x 0.8 x
1.8")
°C/ °F
Resolution
: 0.2° Wt. 108g (3.8oz)
Meter Description
1. Pins
2. Temperature sensor
3. Rotating Head Lock Release
4. Display
5. CAL Adjustment
6. Off/Test/Cal switch
7. Hold button
8. °C/ °F switch
9. Temperature display
10. Batteries
Temperature Units
This meter displays ambient temperature. Readings can be displayed in °C or
°F. Use slide switch on the back of the meter to select the appropriate unit of
measure.
Battery Replacement
Slide the battery compartment cover off, replace the two AAA batteries and
reinstall the cover.
You, as the end user, are legally bound (Battery ordinance) to
return all used batteries and accumulators; disposal in the
household garbage is prohibited!
You can hand over your used batteries / accumulators at
collection points in your community or wherever batteries /
accumulators are sold!
Disposal:
Follow the valid legal stipulations in respect of the
disposal of the device at the end of its lifecycle
Operation
Calibration:
1. Slide the Off/Test/Cal switch to the CAL position.
2. Adjust the rotary CAL adjustment until the display reads 100.
Note: (The CAL adjustment knob is recessed to prevent it from being
accidentally changed. Use an object with a tapered end to make
adjustments.)
3. Slide the Off/Test/Cal switch to the TEST position
4. The meter is now ready to take readings
Taking Readings
The following procedure is used to make relative or comparative readings of
the moisture content in wood, wallboard or other materials. The readings you
will obtain are relative indications of the moisture level NOT % moisture
content. To freeze a reading in the display, press the HOLD button.
1. Slide the switch to TEST.
2. To establish a benchmark for the material you are reading Insert the
sensor's test pins into a known dry
(or acceptable) area of the material
being tested. Insertion should be as deep as possible. Note this ‘dry’
reading.
3. Then insert the sensor's test pins into a known wet area of the material
being tested. Insertion should be as deep as possible. Note this ‘wet’
reading.
4. Use these dry to wet readings as reference points to which subsequent
readings are compared.
Typical Dry and Wet Readings
Wallboard Wood
Indication Moisture Rating Indication Moisture Rating
0-5 Dry 0 to 8 Dry
6-14 Moist 8-22 Moist
>14 Wet >22 Wet
Converting Relative Readings to %Moisture Content
The readings obtained with this meter are relative indications of the moisture
level NOT % moisture content
. Please refer to the table for an approximate
conversion of relative readings to % moisture content.
Pin Replacement
For your convenience this meter uses threaded pins. To replace a pin, simply
unscrew the pin from the meter and replace with a new one being careful not to
over tighten.
Safety Note: The MO100 has a rotating head with a push button lock
release for your safety. Please remember to rotate the head back so that
the pins are safely hidden inside the storage area.
Copyright © 2005 Extech Instruments Corporation
All rights reserved including the right of reproduction in whole or in part in any
form.
MO100-EU-EN V3.3 6/09
Wood Scale Conversion (Approx)
REL 2 4 8 16 22 30 38 44 62 68 72 76 78 83
%MC 16 17 18 19 20 21 22 23 24 25 26 27 28 29
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