General MMD4E User manual

PIN-TYPE LCD

MOISTURE METER

USER’S MANUAL

MMD4E

Please read his manual carefully and horoughly before using his produc .

TABLE OF CONTENTS

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

What’s in the Package . . . . . . . . . . . . . . . . . . . . . . . . . 3

Product verview . . . . . . . . . . . . . . . . . . . . . . . . . . 3 –4

perating Instructions . . . . . . . . . . . . . . . . . . . . . . 4 –6

Checking Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

perating, Maintenance & Safety Tips. . . . . . . . . . 7 –9

Warranty Information . . . . . . . . . . . . . . . . . . . . . . 9 – 10

Return for Repair Policy . . . . . . . . . . . . . . . . . . . . . . . 10

Manuel de L’utilisateur (en Français). . . . . . . . . 11 – 21

Manual del Usuario (en Español) . . . . . . . . . . . . 22 – 32

INTRODUCTION

Thank you for purchasing General Tools & Instruments’

MMD4E Pin-Type LCD Moisture Meter. Please read this user’s

manual carefully and thoroughly before using the instrument.

The MMD4E is designed for use in woodworking, water

damage restoration, building construction and home

renovation. Examples include:

• Checking for moisture on or beneath the surface of carpets,

sub-flooring, ceilings and walls

• Measuring the surface moisture content of wood and

building materials before painting, wallpapering, sealing or

treating

• Selecting dry lumber

KEY FEATURES

• Includes separate moisture-resistance curves for wood

and building materials

• 99.9 count green backlit LCD w/0.3 in. high digits

• Low, medium and high moisture level lights

• Audible high moisture alert

• Reading H LD button

• Replaceable stainless steel test pins

• Pin cap doubles as calibration checker

• Low battery indication

• 3-minute Auto Power Off

• Powered by “9V” battery (included)

• 1 year limited warranty

WHAT’S IN THE PACKAGE

The MMD4E comes in a blister pack with a factory-installed

“9V” battery. Two replacement 9mm (0.35 in.) long test pins—

General Part No. PIN3DE—are included.

PRODUCT OVERVIEW

ig. 1 on the next page shows all of the controls, indicators,

and components on the front and top of the MMD4E, as well

as the location of the battery compartment on its back.

A. Protective pin cap with calibrating resistor inside

B. Test pins with black rubber sleeves (sleeves not shown)

C. LCD

D. Blue L W moisture level

LED

E. M DE button. Toggles

between wood and building

materials measurement

modes

. Green MID moisture level LED

G. Red HIGH moisture level LED

H. Measurement H LD button.

Pressed briefly, “freezes” display readings. Pressed

and held, silences beeper until meter is powered off.

I. button. Press briefly to power meter on; press and

hold for >2 seconds to power meter off.

J. Battery compartment (on back)

OPERATING INSTRUCTIONS

To measure a moisture level:

1. Remove the pin cap.

2. Remove the black rubber protective sleeve from each test

pin.

3. Press the button to power the meter on. The meter will

sound one beep and the LCD will illuminate with a green

backlight and the following readout: _ _ . _%

4. If you are measuring the moisture content of wood, skip

ahead to Step 5. To measure the moisture content of a

building material, press the M DE button. This will change

the display to the following: __ __ . __%

WOOD

Fig. 1

BLDG

5. Carefully press the test pins into the material whose

moisture level you wish to measure. The level will be

displayed as a percentage. The following tables show the

display indications for all possible moisture level readings

in Wood and Building Materials Measurement modes.

To hold any reading (“freeze” the display), briefly press (but

do not hold) the H LD button. To release the hold, briefly

press the H LD button again. This feature allows you to make

a measurement in a dark place or around a corner, hold the

reading, and display it within 3 minutes later where the

lighting is better. Measurements can be held for no more than

3 minutes—the duration of the meter’s Auto Power Off

trigger.

Wood Measurement Mode Reference Table

Moisture Level Display Indication(s)

<5% _ _ . _%

5% to 11.9% XX.X% + blue L W LED

12% to 15.9% XX.X% + green MID LED

16% to 50% XX.X% + red HIGH LED + beeper

>50% _ _ _

. % + red HIGH LED + beeper

Building Materials Measurement Mode Reference Table

Moisture Level Display Indication(s)

<1.5% _ _ . _%

1.5% to 16.9% XX.X% + blue L W LED

17% to 19.9% XX.X% + green MID LED

20% to 33% XX.X% + red HIGH LED + beeper

>33% _ _ _

. % + red HIGH LED + beeper

To power off the meter, press the button and hold it for

more than 2 seconds.

To silence the beeper at any time, press and hold the H LD

button for >3 seconds. This will disable the beeper until the

meter is powered off. The beeper will automatically be re-

enabled when the meter is powered on again.

CHECKING CALIBRATION

You can verify the accuracy of the MMD4E’s readings by

manually checking its calibration at any time. To do so:

Remove the black rubber protective sleeves from the test pins.

2. Remove the pin cap and note the small circuit board attached

to the inside of its rear wall. The rear wall also has two small

holes (left photo below) that provide access to terminals on

the circuit board. The circuit board contains a resistor whose

fixed value can be used to simulate a precise moisture level

and therefore check the calibration of the meter.

3. Power on the meter and push the test pins into the

calibration holes (right photo below). If the meter is properly

calibrated, the displayed reading will be 18.3% ± 1% in

Wood Measurement mode. If you do not obtain a reading

within this range and your meter is still under warranty, call

General’s Customer Service Department at 212-431-6100

to arrange to return the meter for service or replacement.

SPECIFICATIONS

Measurement Range 5 to 50% for wood; 1.5 to 33%

for building materials

Measuring Accuracy ±2%

Moisture Range Indications See tables on page 5

Operating Temperature 32° to 122° (0° to 50°C)

@ <90%RH

Current Consumption <25mA

Auto Power Off Trigger 3 minutes of inactivity

Backlight Duration 15 seconds

Low Battery Icon Trigger <7.3V

Dimensions 5.7 x 2.4 x 1.1 in.

(145 x 62 x 27mm)

Weight (without battery) 3 oz. (86g)

Power Source “9V” battery (included)

OPERATING, MAINTENANCE &

SAFETY TIPS

• Some measurement tips:

1. Measurements of wood moisture level are skewed by

two variables: ambient humidity and the density of the

wood species. The best way to compensate for the effect

of these variables is to develop your own moisture level

curves, based on your experience working with different

species of wood on a day-to-day basis in your

neighborhood.

or example, the humidity level affects the dryness of

interior wood considered “acceptable” for finishing. In

the steamy Deep South, where 60% relative humidity is

the norm, fine carpenters have learned how to work with

wood with 11% moisture content. But in bone-dry

Nevada, Utah, and Arizona, where 30% humidity is

common, the same piece of wood would have to have

less than 6% moisture to be considered ready for

finishing.

2. To locate the source of a leak behind wood, plaster,

drywall or a ceiling, make measurements at different

locations. The leak is where the meter displays the

highest reading.

3. Never use force to drive the test pins into a hard surface.

4. When measuring the moisture level of soil, surface

readings will be lower than readings with the test pins

deep in the soil.

• When the icon appears at the upper left of the LCD,

it’s time to replace the “9V” battery that powers the

instrument (although measurements will remain valid for

several hours after the icon first appears). To replace the

battery, turn the meter over and open the battery

compartment ( ig. 1, Callout J) by using your thumb to slide

the compartment cover down and away from the meter.

Plug a fresh “9V” battery into the wired socket inside the

compartment. The terminals of the battery and the socket

mate in only one way, with the smaller male terminal

plugging into the larger female terminal. Close the battery

compartment by replacing its cover and snapping it shut.

• Do not operate the MMD4E in the presence of flammable or

explosive gases.

• Be careful not to stab yourself with the extremely sharp test

pins.

• Replace the pin cap and black rubber protection sleeves

after making measurements 1) for safety reasons and

2) to avoid bending or dulling the pins.

• After subjecting the meter to a large change in ambient

temperature, wait at least 30 minutes before making

measurements to guarantee the accuracy of readings.

• Remove the battery when storing the unit or when you do

not expect to use it for an extended period of time (months

rather than weeks).

• Do not drop or disassemble the MMD4E or immerse it in

water. Doing so voids the 1-year limited warranty.

WARRANTY INFORMATION

In the U.S, General warrants its instruments and accessories

against defects in material or workmanship for one year from

the date of purchase. General will replace or repair the

defective unit, at its option, subject to verification of the

defect.

This warranty does not apply to defects resulting from abuse,

neglect, accident, unauthorized repair, alteration, or

unreasonable use of the product.

Any implied warranties arising from the sale of a General

product, including but not limited to implied warranties of

merchantability and fitness for a particular purpose, are

limited to the above. General shall not be liable for loss of use

of the product or other incidental or consequential damages,

expenses, or economic loss, or for any claim of such damage,

expenses, or economic loss.

State laws vary. The above limitations or exclusions may not

apply to you.

We encourage you to register your product online. General

will extend your warranty an additional 60 days if you register

at www.generaltools.com/ProductRegistry.

RETURN FOR REPAIR POLICY

Every effort has been made to provide you with a reliable

product of superior quality. However, in the event your

instrument requires repair, please contact our Customer

Service to obtain an RGA (Return Goods Authorization)

number before forwarding the unit via prepaid freight to the

attention of our Service Center at this address:

General Tools & Instruments

75 Seaview Drive

Secaucus, NJ 07094

212-431-6100

Remember to include a copy of your proof of purchase, your

return address, and your phone number and/or e-mail

address.

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