EXTECH Compact Moisture Meter MO50 User Manual

: June 6, 2024
: EXTECH

Table of Contents

Introduction
Features
Description
Display Description
Button Description
Operation
Operating Steps
Maintenance
Care and Cleaning
Specifications
Two-year Warranty
Documents / Resources

USER MANUAL

Compact Moisture Meter Model MO50

Introduction

Thank you for selecting the Extech MO50 Moisture Meter. The compact MO50 takes quick Moisture level reference measurements (in percent %) on wood and building materials. The MO50 is simple to operate and offers measurement digits, audible tones, and ‘moisture drop’ icons to indicate moisture level content.

The MO50 is ideal for building restoration projects and applications where moisture detection on floors and under carpets is critical. The MO50 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
Displays the moisture level in building materials (wallboard, sheetrock, cardboard, plaster, concrete, and mortar)
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 the display
Auto Power Off conserves battery power
Complete with pins (2), protective cap, and 9V battery

Description

Meter Description

Measurement pins
LCD Display
Power button
Material Select button
Display Lock/Beeper button
Notes:
Battery compartment on rear of meter Protective pin cover not shown

Display Description

Moisture Drop icons (1 droplet for low moisture content, 2 for medium, and 3 for high)
Wood mode
Building Material mode
Beeper active icon
Moisture reading digits
Percent moisture unit (relative)
Display Lock mode
Battery status icon

Button Description

Button	Button name	Description
Power ON-OFF	Press and hold to switch the meter ON or OFF
Material Select	Select Material Group (Wood, Building Materials)
Display Lock / Beeper control	Short press locks reading on the display Long

press toggles the Beeper ON/OFF

Operation

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.

Operating Steps

Carefully remove the protective/test cap to expose the electrode pins.
Switch the meter ON by pressing and holding 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.
Momentary presses of the Material Select button toggles the Wood and Building Material modes of operation. The displayed icons indicate the selected mode.
Push the electrode pins into the material under test.
Observe the displayed reading in percent (%), view the displayed moisture droplet icon, and listen for the audible tones.

1moisture droplet for low readings; 2 for medium readings; 3 for high readings; refer to the chart on the back of the meter and the reproduction in the Appendix later in this guide Listen, also, to the audible measurement tone (fast beeping for higher readings and slow beeping for lower readings). There are eight (8) tone variations

6. Press and hold the power button to switch the meter off.

Auto Power OFF (APO)
To conserve battery energy the meter automatically switches off after a three (3) minute period of inactivity.
Display Lock
Press the Display Lock button to freeze the displayed reading. The icon is visible on the display when Display Lock is active. Press again to return to the normal operating mode.

Beeper ON/OFF
The beeper defaults to ON. To switch the beeper OFF, press and hold the Display Lock/Audible Beeper button When the beeper is active the audio display icon will be visible.

Self Test cap
Turn on the MO50 meter and set the meter to Wood or Building and press the electrode pins to the contacts on the top of the Protective/Test cap.
Expected results:

Wood	17.0 to 19.0%
Building:	15.5 to 17.5%

If the meter reads outside of these measurements replace the batteries. If it still reads outside If these measurements, the meter is defective and you should contact Extech.

Maintenance

Battery Replacement

When the battery status icon appears empty or flashing, replace the battery.

Remove the rear battery compartment cover by pushing the compartment latch.
Replace the 9V battery observing correct polarity.
Replace the compartment door securely.
Dispose of battery responsibly and within applicable legal regulations.

Never dispose of used batteries or rechargeable batteries in household waste. As consumers, users are legally required to take used batteries to appropriate collection sites, the retail store where the batteries were purchased, or wherever batteries are sold.

Disposal : Do not dispose of this instrument in household waste. The user is obligated to take end-of-life devices to a designated collection point for the disposal of electrical and electronic equipment.

Care and Cleaning

When the instrument is not in use please keep the protective cap in place. The electrode pins are extremely sharp.
Store the meter in an environmentally stable, dust-free environment, out of direct sunlight.
Remove the battery from the instrument if the meter is to be stored for long periods or if the battery power symbol appears empty (or flashing) on the display.
To clean the meter case, wipe with a damp cloth do not use solvents or abrasives.
To clean the pins, wipe carefully with a damp cloth to remove residue; allow to dry well before use.

Specifications

Display	LCD with multi-function indicators
Measurement type	Relative Moisture Content (%)
Measurement principle	Electrical resistance
Measurement indication	Digital, Moisture Droplet icons (1, 2, or 3 droplets)

and audible tone with 8 levels of intensity indicating low to high moisture readings
Measurement ranges| Wood Low: 5% to 11.9%; Medium: 12% to 15.9%; High: 16 to 50% Building Materials
Resolution| 0.1%
Accuracy| ±3.0% for ambient conditions 22ºC to 25ºC (72ºF to 77ºF)
Electrode pin length| 0.3” (8mm)
Electrode pin type| Stainless steel. Integrated, replaceable
Auto Power OFF| After approx. three (3) minutes
Power supply| One (1) 9V Battery (rear compartment)
Consumption| < 15mA
Low Battery indication| When battery voltage is < 7.0VDC,approximately
Operating conditions| 5~45ºC (41~113ºF); 80%RH max.
Storage conditions| 0~50ºC (32~122ºF); 85%RH max.
Dimensions| 170 x 65 x 30mm (6.7 x 2.6 x 1.2″)
Weight| 120g (4.2 oz.) without battery

Measurement Interpretation Table

| WOOD (%)| BUILDING MATERIALS (%)
---|---|---
TOTAL RANGE >| 5~50| 1.5~33
| LOW| 5~9.9| 1.5~9.9
10~11.9| 10~16.9
| MEDIUM| 12~13.9| 17~17.9
14~15.9| 18~19.9
| HIGH| 16~19.9| 20~23.9
20~29.9| 24~27.9
30~39.9| 28~29.9
40~50| 30~33

Two-year Warranty

FLIR Systems, Inc. warrants this Extech brand instrument to be free of defects in parts and workmanship for two years from the date of shipment (a six-month limited warranty applies to sensors and cables). To view the full warranty text please visit http://www.extech.com/support/warranties.

Calibration and Repair Services

FLIR Systems, Inc. offers calibration and repair services for the Extech brand products we sell. We offer NIST traceable calibration for most of our products. Contact us for information on calibration and repair availability, refer to the contact information below. Annual calibrations should be performed to verify meter performance and accuracy. Product specifications are subject to change without notice. Please visit our website for the most up-to- date product information: www.extech.com.

Contact Customer Support
Customer Support Telephone List: https://support.flir.com/contact
Calibration, Repair, and Returns: repair@extech.com
Technical Support: https://support.flir.com

Copyright © 2015-2020 FLIR Systems, Inc.
All rights reserved including the right of reproduction in whole or in part in any form
www.extech.com

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