Extech Extech MO290 Manual

User's Guide

Pinless Moisture/Humidity Meter + IR
Model MO290

99 Washington Street
Melrose, MA 02176

Phone [phone]
Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

Introduction

Congratulations on your purchase of the Extech MO290 Pinless Moisture Meter with
Patented Built-in IR Thermometer. Monitor moisture in wood and other building materials with
no surface damage with the Pinless Moisture sensor (Pin-type Moisture Probe included).
Measure Humidity and Air Temperature with built-in probe plus non-contact InfraRed
Temperature with patented IR design. Advanced functions provide Grains per Pound, Dew
Point and Vapor Pressure calculations. This meter is shipped fully tested and calibrated and,
with proper use, will provide years of reliable service.

Meter Description

1. IR temperature sensor

2. Laser pointer

3. Humidity sensor

4. Temperature sensor

5. LCD display

6. Relative Humidity button

7. Mode/Zero Button

8. IR thermometer button

9. Alarm set button

10. Alarm adjust down button

11. ON/OFF power button

12. Remote pin probe input jack (bottom)

13. Battery compartment (rear)

14. Alarm adjust up button

15. Moisture/Relative button

16. Protective cap

LCD Display

1. MIN MAX – Minimum and maximum value

2. HIGH LOW – Alarm limits

3. INT EXT – Internal/External probe

4. mBar – Vapor pressure

5. kPa – Vapor pressure

6. GPP – Grains per Pound

7. g/kg – Grains per kilogram

8. MOIST – Moisture mode

9. RH% - Relative Humidity mode

10. COND – Condensation mode

11. APO – Auto power off

12. DEW – Dew Point temperature

13. C/F – Temperature units

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15.

- Low battery

- Laser pointer On

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MO290 V3.0 03/09

Safety

• Use extreme caution when the laser pointer beam is on

• Do not point the beam toward anyone's eye or allow the

beam to strike the eye from a reflective surface

• Do not use the laser near explosive gases or in other
potentially explosive areas

Features

• Quickly indicates the moisture content of materials with Pinless technology without
damaging the surface;

• Optional remote Pin-type probe (MO290-P) allows for moisture readings at different
penetration levels (3ft/0.9m cable length);

• Easy to read, large dual display with backlit feature;

• Simultaneously displays % moisture of wood or material being tested and Air

Temperature, IR Temperature, or Humidity

• Designed with patented IR design to measure non-contact surface temperature; 8:1
distance to spot ratio with 0.95 fixed emissivity

• Built-in Humidity/Temperature probe measures Relative Humidity,

• Air Temperature plus Grains Per Pound (GPP) and Dew Point (DP)

• Automatic calculation of differential Temperature (IR - DP)

• Min/Max and Data Hold

• Auto power off and low battery indication

Battery Replacement

1. Turn off the meter.

2. Remove one Philips head screw and lift off the rear battery cover.

3. Replace the 9V battery.

4. Secure the rear battery cover.

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MO290 V3.0 03/09