Extech Instruments MZ13604 Manuel utilisateur

USER MANUAL

Dual Moisture Meter

Pin and Pinless Moisture Measurements

Model MO55

MO55-en-GB_V1.1 10/18

Introduction

Thank you for selecting the Extech MO55 Pin and Pinless Dual Moisture Meter. The compact

MO55 takes quick Moisture level reference measurements (in percent %) on wood and building

materials. The MO55 can be used in pinless mode (rear sensor) or in pin mode. The MO55 is

simple to operate and offers measurement digits, audible tones and ‘moisture drop’ icons to

indicate moisture level content.

The MO55 is ideal for building restoration projects and applications where moisture detection on

floors and under carpets is critical. The MO55 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 and building materials (wall board, sheet rock, cardboard,

plaster, concrete, and mortar)

Pinless (non-invasive) or Pin modes of operation

Auto zero calibration for Pinless mode

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 display

Auto Power Off after 2 minutes conserves battery power

Complete with protective cap and 9V battery

MO55-en-GB_V1.1 10/18

Description

Meter Description

1. Protective cover and pin-mode self-test circuit

2. Measurement pins

3. LCD Display

4. Power button

5. Mode (M) Pin/Pinless and Material selection

6. Display Lock/Beeper button

7. Internal sensor (rear)

8. Battery compartment (rear)

Display Description

1. Moisture Drop icons (1 droplet for low moisture content, 2 for medium, and 3 for high)

2. Wood mode

3. Building Material mode

4. Beeper active icon

5. Moisture reading digits

6. Percent moisture unit (relative)

7. Display Lock mode

8. Battery status icon

Button Description

Button

Button name

Description

Power ON-OFF

Press and hold to switch the meter ON or OFF

Mode (Material Select)

Select Material (Wood, Building Materials) for

Pin or Pinless mode

Display Lock / Beeper control

Short press locks reading on the display

Long press toggles the Beeper ON/OFF

MO55-en-GB_V1.1 10/18

Operation

Operating Steps

1. For pin mode, carefully remove the protective/test cap to expose the electrode pins.

2. Switch the meter ON by long press of 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.

3. Momentary presses of the Mode (M) button step through the following four material modes:

Wood - Pin mode , Building Material - Pin mode , Wood - Pinless mode (icon blinking)

, and Building Material - Pinless mode (icon blinking) .

4. For pin mode, push the electrode pins into the material under test.

5. For pinless mode, with power on, hold the meter in open air

(rear sensor should be clear of hands and any objects) and then

select material (step 3); the meter is now zero-calibrated. Press

the sensor firmly against the surface under test to take a

reading.

6. Observe the displayed reading in percent (%), view the displayed moisture droplet icon

and listen for the audible tones.

1 moisture droplet for low readings; 2 for medium readings; 3 for high readings; refer to the

chart on the back of the meter. Listen for the audible tone (fast beeping for higher readings

and slow beeping for lower readings).There are eight (8) tone variations.

7. Long press of the power button switches the meter off.

Measurement Interpretation Table

PIN MODE

PINLESS MODE

WOOD (%)

BUILDING

MATERIAL (%)

WOOD (%)

BUILDING

MATERIAL (%)

TOTAL RANGE >

5.0~50.0

1.5~33.0

0.0~99.9

LOW

5.0~11.9

1.5~16.9

0.0~16.9

MEDIUM

12.0~15.9

17.0~17.9

17.0~29.9

HIGH

16.0~50.0

20.0~33.0

30.0~99.9

Auto Power OFF (APO)

To conserve battery energy the meter automatically switches off after a two-minute period of

inactivity.

CAUTION: The electrode measurement pins are extremely sharp. Use care when

handling this instrument. Cover the pins with the protective cap when not in use.

MO55-en-GB_V1.1 10/18

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 until the icon disappears. When the beeper is active the audio display icon

will be visible.

Pin-Mode Self-Test

Turn on the meter and set the meter to Pin mode Wood or Building materials and then touch

the electrode pins to the contacts through the holes at the top of the Protective/Test cap.

Expected result: Wood 17.0 to 19.0%; Building 15.5 to 17.5%

When the meter reads outside of these ranges please replace the battery and retry. If the meter

continues to read outside of these ranges, the meter should be returned for service.

Pinless Mode Comparison Measurements

While holding the meter against a known dry surface, turn on the meter. Press the Mode (M)

button to step to the preferred setting, blinking wood or blinking building material icon. The

meter will now read 0% (relative/offset reading). Now move the meter to other areas to test to

find higher levels of moisture.

Maintenance

Battery Replacement

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

1. Remove the rear battery compartment cover by pushing the compartment latch.

2. Replace the 9V battery observing correct polarity.

3. Replace the compartment door securely.

4. 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.

Store the meter in a 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.

MO55-en-GB_V1.1 10/18

Specifications

Display LCD with multi-function indicators

Measurement type Relative Moisture Content (%)

Measurement principle Electrical resistance (pins)

Electrical capacitance internal sensor (pinless)

Measurement depth Pinless mode: < 25mm (1 in.)

Auto Calibration Pinless mode in open air

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 PIN MODE: 5.0~50.0% (wood), 1.4~33.0% (building materials);

PINLESS MODE: 0.0~99.9% (for wood and building materials)

Resolution 0.1%

Accuracy (Pin mode) ± (3% + 5 digits) for ambient conditions 22 oC to 25 oC (72 oF to 77 oF)

Electrode pin length 0.3” (8mm)

Electrode pin type Stainless steel. Integrated, replaceable

Auto Power OFF After approx. two (2) minutes

Power supply One (1) 9V Battery (rear compartment)

Consumption < 40mA

Low Battery indication Battery status icon appears empty or flashing

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

www.extech.com

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