Extech Instruments MO290-NISTL Manuel utilisateur

User's Guide

Pinless Moisture/Humidity Meter + IR

Model MO290

MO290-en-GB_V3.6 4/15

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-en-GB_V3.6 4/15

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

Cautions

This device is not a toy and must not reach children’s hands. It contains hazardous objects as well

as small parts that the children could swallow. In case a child swallows any of them, please

contact a physician immediately

Do not leave the battery and packing material lying around unattended; they can be dangerous for

children if they use them as toys

In case the device is going to be unused for an extended period of time, remove the battery to

prevent them from draining

Expired or damaged batteries can cause cauterization on contact with the skin. Always, therefore,

use suitable hand gloves in such cases

See that the battery is not short-circuited. Do not throw the battery into a fire.

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.

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.



OtherBatterySafetyReminders

oNeverdisposeofbatteriesinafire.Batteriesmayexplodeorleak.

oNevermixbatterytypes.Alwaysinstallnewbatteriesofthesametype.

MO290-en-GB_V3.6 4/15

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.

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.

MO290-en-GB_V3.6 4/15

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

secondary display.

4. 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-en-GB_V3.6 4/15

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.

Change Temperature units from F to C or C to F

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

2. Press the IRT button to turn on the IR thermometer and then release the button.

3. Press the ▲or ▼button to set the desired temperature unit

MO290-en-GB_V3.6 4/15

Specifications

Function Range Accuracy

Pinless Moisture 0 to 99.9 Relative only

External - Moisture in

wood 6-99 % ± 5%

External - Moisture in

building materials 13-99 % ± 5%

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 -30 to 100°C (-22 to 199°F)

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

Sample Rate 2 per second

Backlight White LED

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

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

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

45%, 40-50°C (104-122°F)

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 165x70x38mm (6.5x2.8x1.5’)

Weight 210g (7.4oz)

Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform

ISO‐9001Certified

www.extech.com

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