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MO57--/17 enGB_V1.0 7

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USER MANUAL

Pinless Moisture Meter

Model 57MO

Introduction

Thank you for selecting 57 employs a the Extech MO57 MPinless oisture Meter. The MOnon-

destructive spherical sensor that safely glides over surfaces to measure the relative moisture in

wood and other building materials (board, sheet rock, cardboard, pwalllaster, concrete, and mortar)

at any angle to a depth of 10.2cm (4”).

To indicate moisture MO57 provides a digital readingaudible tonesand ‘moisture droplevel the , , let’

icons. Audi ble tones (eight levels of intensity) and droplet icons (1, 2, or 3) increase in proportion to

increased moisture. Additional features include Auto Power OFF and Display Lock (hold).

This meter ships fully tested and calibrated and, with proper use, will provide years of reliable

service. Please visit our website () to check for the latest version of this User Guide, www.extech.com

Product Updates, and Customer Support.

Measurement Considerations

To measure moisture, the sensor emits and senses low--power electromagnetic signals. The

displayed reading in percent is an average of the moisture content measured over the measurement

surface area and the maximum depth of penetration ..0(10 2cm [4”]). Moisture that is closer to the

surface has a greater effect on the displayed average than the moisture nearer to the maximum

depth of penetration.

Placing the sensor on a surface whose thickness is less than the maximum depth of penetration may

result in unreliable moisture readings; in these cases, you can stack material on top of the measured

surface to increase the thickness.

The MO57 also produces audible tones and ‘moisture droplet’ display icons to indicate moisture

level. The audible tone rate and number of droplets increase as the moisture level increases. When

measuring, keep hand stationary on the meter while holding and moving the meter, as hand

movement can affect the readings.

Meter Description

1. LCD Display

2. Power button

3. Display Lock/Beeper button

4. Material Select button

5. Sensor

NoteBatt: ery compartment on rear of meter

Display Description

1. Dropleticons(1 for low moisture, 2 for medium, and 3 for high)

2. Wood mode

3. Building Material mode

4. Beeper active icon

5. Moisture reading

6.Percent moisture unit (relative)

7. Display Lock mode

8. Battery status icon

Button Descriptions

Symbol

Button name

Description

Power - ONOFFLong press to switch the meter ON or OFF

/

Material Select (wood/building

materials)

Short press to toggle material groups

/ Display Lock / Beeper control

Short press locks/unlocks reading on the display

Long press toggles the Beeper ON/OFF

Operation

Powering the Meter

1. . Long press the power button to turn the meter ON/OFF

2.The meter emits audible tones andcalibration upon startKeep the -performs a self-up.

measurement sensor at least 8 to 10 cm (3 to 4”) from hands and during calibrationobjects .

The calibration reading must not exceed 0.5. If so, recalibrate ensuring that hands or other -

objects are clear of the sensor.enever Note: Calibrate the meter whmoving from one

measurement area to another.

3.If the battery symbol appears or if the meter does not switch ON, . replace the battery

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Product specificaties