Manual Vonroc MM501DC (page 5 of 36) (English, German, Dutch, French, Italian, Polish, Spanish)

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DESCRIPTION

The numbers in the text refer to the diagrams on

page 2.

1. On/off button.

2. HOLD button

3. MODE button

4. LED bar graph

5. High-contrast, white-on-black LCD

6. Removable pin cover

7. Battery cover

8. Moisture level readout

9. Indicates wood measurement mode

10. Indicates operation in pin mode

11. Indicates building material measurement mode

12. Low battery charge indication

13. Indicates a held measurement

14. Measurement pin covers

15. Measurement pins

16. Calibration holes

3. ASSEMBLY

Inserting / Replacing the Battery (Fig. B)

The moisture meter is powered by a ‘9V’ battery

(included in the package).

1. Push the tab on the battery cover (7) gently

until it pops open.

2. lnsert battery with correct polarity according to

battery cover indications.

3. Close the battery compartment cover (7).

To extend battery life in both operating modes, the

moisture meter automatically 1) dims the bright-

ness of its backlit LCD by one-half after 15 seconds

and 2) powers itself off after 1 minute of inactivity.

The low battery charge symbol (12) appears

when the battery charge is low, and thus must be

replaced.

4. OPERATION

Introduction

The moisture meter bases its measurements on

the relationship between the moisture content of a

material and its electrical conductivity. The wetter a

material, the higher its conductivity.

The two replaceable steel pins at the top of the

moisture meter serve as the electrodes of a con-

ductance meter optimized for measuring moisture

content. The meter displays measurements in the

unit %WME (Wood Moisture Equivalent).

For hard materials like wood, the meter’s readings

largely reﬂect surface moisture content because:

1) Moisture close to a surface has a greater effect

on a reading than moisture deep below it; and 2)

The pins of the moisture meter are only 8mm long

and therefore cannot be driven deep into a hard

material. For softer materials like soil, paper or

powders, readings are more likely to reﬂect the

average moisture level of the material between

its surface and the penetration depth of the pins

(normally far less than 8mm).

Switching on and off (Fig. A)

To turn the moisture meter ON, brieﬂy press the on/

off button (1). Press and hold the button for at least

3 seconds, to turn the moisture meter off.

LED Bar graph (Fig. A)

Below the LCD is an analogue bar graph comprising

three banks of different-coloured LEDs. The LEDs

light up in sync with changes in the digital readout.

As the test pins are moved around a sample, or

moved among samples, the colour of the right-

most ‘lit’ LED (green, orange or red) may change.

Any such change indicates a sizable difference in

the moisture content of different areas of the same

sample, or of different samples of wood or building

material. The following different moisture ranges

of wood and building materials are indicated by the

three LED bar graph bands:

• In wood mode, only green LEDs indicate that a

test area’s moisture content is between 5% and

11.9% (dry). When only green and orange LEDs

are lit, the area has a moisture content of 12%

to 15.9% (medium moisture content). When

green, orange and red LEDs are lit, the area

has a moisture content between 16% and 50%

(wet).

• In building material mode, only green LEDs

indicate that a test area’s moisture content

is between 1.5% and 16.9% (dry). When only

green and orange LEDs are lit, the area has a

moisture content of 17% to 19.9% (medium

moisture content). When green, orange and red

LEDs are lit, the area has a moisture content

between 20% and 33% (wet).

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Vonroc MM501DC Manual

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