Extech Instruments MO290 User manual

User's Guide

Pinless Moisture/Humidity Meter + IR

Model MO290

MO290 V3.1 03/10

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

14. - Low battery

15. - Laser pointer On

123

MO290 V3.1 03/10

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.

MO290 V3.1 03/10

Operation

Powering the meter

1. Remove the RH sensor protective cap before use.

2. Press the power button to turn the meter on.

3. If the symbol appears or the meter does not turn on, replace the battery.

Humidity (Dew point, GPP, g/kg) Measurements

1. Press the power button to turn the meter on.

2. Press the RH button

3. Relative Humidity will be displayed in the primary display and the temperature will be

displayed in the secondary display.

4. Press the up or down arrow button to change the temperature units.

5. Press the MODE button to display the DEW point.

6. Press the MODE button to display GPP (°F) or g/kg (°C)

Pinless Moisture Measurements

1. Press the power button to turn the meter on.

2. Press the MOIST button to select Moisture measurement.” MOIST”, and “INT”

(internal pinless sensor) will appear in the display.

3. Hold the meter so that the rear sensor is away from any surface or your hand. The

reading should be near 0.0. If not, press and hold the ZERO button for more than 2

second and the ZERO icon appears.

4. Place the rear sensor on the surface of the material to be tested and read the relative

moisture content.

Pin Type Moisture Measurements

1. Connect the external pin probe to the jack on the bottom of the meter.

2. Press the power button to turn the meter on.

3. Press the MOIST button twice to select Moisture measurement.” MOIST”, and “EXT”

(external pin probe) will appear in the display.

4. Press the probe pins into the material and read the % moisture content in the display.

MO290 V3.1 03/10

Infrared Temperature Measurements

1. Press the power button to turn the meter on.

2. Press the IRT button to enable the IR thermometer and the laser pointer. The laser

pointer icon will flash while the mode is active.

3. Press the up or down arrow button to change the temperature units

4. Aim the laser pointer at the surface to be measured and read the surface temperature

in the secondary display.

5. Release the IRT button. The last temperature measured and the laser icon will remain

on the display for approximately 10 seconds before returning to ambient temperature

measurement.

IRT MAX MIN display:

The meter can be set to display only the maximum or minimum temperature measured

during an IR scan.

1. With the meter in the IR hold mode, press the MODE button. “MIN” will appear in

the display.

2. Press the IRT button to enable the IR thermometer. The meter will display the

minimum temperature measured and will update only when a lower temperature is

measured.

3. Press the MODE button twice to enable the MAX mode and proceed as stated

above for the maximum temperature.

4. The MAX or MIN temperature is not stored when the function is exited.

IR Field of View

Ensure that the desired target is larger than the spot size. As the distance from an object

increases, the spot size of the area measured by the meter becomes larger. The meter’s

field of view ratio is 8:1, meaning that if the meter is 8 inches (cm) from the target, the

diameter (spot) of the object under test must be at least 1 inch (cm). Refer below to the

field of view diagram.

WARNING: Do not directly view or direct the laser pointer at an eye. Low power

visible lasers do not normally present a hazard, but may present some potential for

hazard if viewed directly for extended periods of time.

1” @ 8”

2” @ 16”

20mm @ 160mm

40mm @ 320mm

MO290 V3.1 03/10

Condensation Mode

The Condensation feature alerts the used when the surface temperature as measured by the

IR thermometer is close to or has reached the Dew Point temperature.

1. Press the power button to turn the meter on.

2. Simultaneously press the MOIST/REL and RH buttons. The “COND” icon will appear.

3. Point the meter at a surface, press the IRT button to measure the surface

temperature. The small display will indicate the IR surface temperature and the large

display will indicate the difference between the IR temperature and the Dew Point

temperature.

4. The meter will then report the potential for condensation on that surface in the

following manner

•If the temperature of the IRT is more than 14°C (25°F) above the Dew Point, the

temperature difference shall be displayed, with no other warning.

•If the temperature of the IRT is 3-14°C (5-25°F) above the Dew Point, the

temperature difference shall be displayed, along with a standard Condensation

Indicator icon. The meter shall beep once to confirm that the reading is in the risk

area.

•If the temperature of the IRT is less than 3°C (5°F) above the Dew Point, the

temperature difference shall be displayed, along with a flashing Condensation

Indicator icon. The meter shall beep twice to confirm that the reading is in the high-

risk area.

5. Press the RH button to exit the mode.

Vapor Pressure Mode

1. With the Condensation mode active, press the MODE button to display the Vapor

Pressure in mBAR (°F) or kPa (°C).

2. Press the MODE button to exit the Vapor Pressure mode.

Alarm High and Low Limit Setting

High and Low alarm points can be set for Humidity and Moisture measurements.

Humidity Alarm Set Procedure:

1. With RH% displayed, simultaneously press the RH and MODE buttons.

2. The “HIGH” icon will appear on the display.

3. Press the ▲or ▼button to set the high limit desired.

4. Press the ALARM SET button to save the value and proceed to the LOW set value.

5. With the “LOW” icon in the display, Press the ▲or ▼button to set the low limit

desired.

6. Press the ALARM SET button to save the value and to return to the normal mode.

7. If the humidity measurement is lower than the low alarm setting or higher than the

high alarm setting, the meter will beep once every second.

Moisture Alarm Set Procedure:

1. With MOIST displayed, simultaneously press the MOIST/REL and MODE buttons.

2. The “HIGH” icon will appear on the display.

3. Press the ▲or ▼button to set the high limit desired.

4. Press the ALARM SET button to save the value and proceed to the LOW set value.

5. With the “LOW” icon in the display, Press the ▲or ▼button to set the low limit

desired.

6. Press the ALARM SET button to save the value and to return to the normal mode..

7. If the moisture measurement is higher than the LOW alarm setting, the meter will

beep once every second

8. If the moisture measurement is higher than the HIGH alarm setting, the meter will

beep continuously.

MO290 V3.1 03/10

Auto Power Off

The meter will enter a sleep mode after 30 minutes of inactivity. The meter will emit a warning

beep 15 seconds before shutting down.

To disable the APO feature, press the MODE button when turning the meter ON. The “APO”

icon will not appear, indicating it is disabled.

Specifications

Function Range Accuracy

Pinless Moisture 0 to 99.9 Relative only

Ext. Pin Moisture 0 to 99.9 Relative only

Pinless Depth Up to 0.75” (19mm)

RH Measurement 0 to 10% ± 3%RH

11 to 90% ± 2.5%RH

91 to 100% ± 3%RH

Air Temperature -20 to 170°F (-29 to 77°C) ±3.6°F (2.0°C)

IR Temp -4 to 31°F ±9°F

32°F ± 2°F

33 to 392°F Greater of ±3.5% or ±9°F

-20 to-1°C ±4.5°C

0°C ±1°C

1 to 200°C Greater of ±3.5% or ± 4.5°C

Display 3-digit primary display, 4-digit secondary display

Vapor Pressure 0 to 20.0kPA

Dew Point -22 to 199°F (-30 to 100°C)

Mixing Ratio 0-999GPP (0 to 160g/kg)

Sample Rate 2 per second

Backlight White LED

Operating Temperature 40 to 110°F (4 to 43°C)

Storage Temperature -14 to 140°F (-30 to 60°C)

Operating Humidity 90%, 32-86°F (0-30°C), 75%, 86-104°F (30-40°C),

45%, 104-122°F (40-50°C)

Storage Humidity 90%

Power Supply 9V battery

Battery Life 6-8 weeks (4 hrs/day use), using alkaline batteries

Auto Power Off (APO) After 30 minutes (nominal) inactivity. The APO function can be

disabled by the user.

APO Quiescent Current 50µA maximum

Dimensions 6.5x2.8x1.5’ (165x70x38mm)

Weight 7.4oz (210g)

MO290 V3.1 03/10



Support line (781) 890-7440

Technical Support: Extension 200; E-mail: support@extech.com

Repair & Returns: Extension 210; E-mail: [email protected]

Product specifications subject to change without notice

For the latest version of this User Guide, Software updates, and other

up-to-the-minute product information, visit our website: www.extech.com

Extech Instruments Corporation, 285 Bear Hill Road, Waltham, MA 02451

Warranty

EXTECH INSTRUMENTS CORPORATION (A FLIR COMPANY) 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.

Calibration and Repair Services

Extech offers repair and calibration services for the products we sell. Extech also

provides NIST certification for most products. Call the Customer Care Department for

information on calibration services available for this product. Extech recommends that

annual calibrations be performed to verify meter performance and accuracy.

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