Extech Instruments MO210 User manual
User Guide
Moisture Meter
Model MO210
Introduction
Congratulations on your purchase of the Extech MO210 Moisture Meter. The MO210
detects moisture in wood and building materials such as wall board, sheet rock,
cardboard, paper, plaster, concrete, and mortar. Careful use of this meter will provide
years of reliable service.
Model MO210 Version 1.0 Aug 2007
2
Specifications
Display Dual measurement scale LCD with bargraph metering
Measurement principle Electrical resistance
Range Wood: 6 to 44%, Building materials: 0.2 to 2.4%
Electrode length 0.3” (8mm)
Electrode pins Integrated, replaceable
Auto Power OFF After approx. 15 minutes
Power supply Three (3) CR-2032 button cells
Meter housing Impact-proof plastic
Operating Temperature 32 to 104oF (0 to 40oC)
Operating Humidity 85% Relative Humidity maximum
Dimensions 5.1 x 1.6 x 1.0” (130 x 40 x 25mm)
Weight 3.5 oz. (100g)
Description
Meter Description
1. Measurement electrode pin
2. Cutoff switch
3. LCD (detail below)
4. Hand grip
5. Verification Test Points
6. Battery check Test Points
7. Removable cap
8. Material Selector Switch
Display Description
1. Graphical Display
2. Numerical Reading
3. Units
4. Low Battery Indicator
5. Solid lines – even number
6. Dashed lines – odd number
Wood Scale Building Material
Scale
44
22
33
5
5
6
6
1
Model MO210 Version 1.0 Aug 2007
3
Operation
1. Remove the protective cap to expose the electrode pins.
2. The meter automatically switches ON when the cap is removed.
3. The meter automatically shuts OFF when the cap is replaced.
4. To conserve battery life, the meter automatically shuts off after 15 minutes when
the cap is left off. To revive the meter after an Auto Power OFF, simply press the
yellow cut-off switch momentarily.
5. Slide material selection switch to read wood moisture or building moisure.
6. Carefully push the electrode pins as far as possible into the material under test.
Note that the pins should be inserted into wood perpendicular to the wood’s fiber
structure.
7. Take several readings in several locations on the material for the best
representation of the amount of moisture present.
8. Read the measurement values on the display.
9. Replace the protective cap when finished.
Reading the Display
1. The LCD display has two scales
2. The wood scale indicates wood moisture from
6 to 44%.
3. The building materials scale (plaster, brick,
concrete, mortar, etc.) indicates moisture
content from 0.2 to 2.0%.
4. A continuous line indicates an even number.
A dotted line indicates on odd number.
5. The battery icon appears when the batteries
are weak and require replacement.
Auto Power OFF
With the protective cap removed, the meter will
turn off after 15 minutes to conserve battery life.
Press the yellow cutoff switch momentarily to
restart the meter. Always secure the protective cap
when the instrument is not in use.
Instrument Measurement Verification check
1. With the meter wood moisture position, touch the electrode test pins to the two test
points 1 and 2 at the top of the protective cap labeled ‘T’.
2. With the unit on and the electrode pins touching the ‘T’ test points, the meter should
read 27% ±2%. If not, the meter may require repair.
Battery Check
1. With the meter wood moisture position, touch the electrode
test pins to the two test points 3 and 4 at the top of the
protective cap labeled ‘B’ (see diagram).
2. With the unit on and the electrode pins touching the ‘B’ test points, the meter should
read > 44% on the wood moisture scale. If not, replace the batteries.
CAUTION: The electrode measurement pins are extremely sharp. Use
care when handling this instrument. Cover the pins with the protective cap
when the instrument is not in use.
T
B
12
34
Wood Scale Building Material
Scale
Model MO210 Version 1.0 Aug 2007
4
Support line (781) 890-7440
Product specifications subject to change without notice
For the latest version of this User’s Guide, Software updates, and other up-to-the-
minute product information, visit our website: www.extech.com
Extech Instruments Corporation, 285 Bear Hill Rd., Waltham, MA 02451
Battery Replacement
If the instrument does not switch on, displays the low battery symbol, or if the Battery
Check yields less than 44% on the wood moisture scale, replace the batteries as follows:
1. Remove the Phillips head screw from the belt clip/battery compartment located
on the rear of the instrument.
2. Remove the batteries taking note of their orientation and polarity.
3. Install three (3) new CR-2032 button batteries observing polarity.
4. Secure the battery compartment with the Phillips head screw.
Electrode Pin Replacement
To replace the two electrode pins:
1. Remove the protective cap
2. Unscrew the electrode pins
3. Install the new pins
4. Replace the protective cap
Maintenance
•Always keep the instrument dry
•Prevent dirt from accumulating at the electrode pins
Warranty
EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects
in parts and workmanship for one year from date of shipment (a six month limited warranty
applies to sensors and cables). If it should become necessary to return the instrument for
service during or beyond the warranty period, contact the Customer Service Department at
(781) 890-7440 ext. 210 for authorization or visit our website www.extech.com for contact
information. A Return Authorization (RA) number must be issued before any product is
returned to Extech. The sender is responsible for shipping charges, freight, insurance and
proper packaging to prevent damage in transit. This warranty does not apply to defects
resulting from action of the user such as misuse, improper wiring, operation outside of
specification, improper maintenance or repair, or unauthorized modification. Extech
specifically disclaims any implied warranties or merchantability or fitness for a specific
purpose and will not be liable for any direct, indirect, incidental or consequential damages.
Extech's total liability is limited to repair or replacement of the product. The warranty set
forth above is inclusive and no other warranty, whether written or oral, is expressed or
implied.
Copyright ©2007 Extech Instruments Corporation
All rights reserved including the right of reproduction in whole or in part in any form.
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