VONROC MM501DC Moisture Meter Instruction Manual

: June 9, 2024
: VONROC

Table of Contents

MM501DC Moisture Meter
SAFETY INSTRUCTIONS
MACHINE INFORMATION
ASSEMBLY
OPERATION
MAINTENANCE
WARRANTY
Documents / Resources

MOISTURE METER
MM501DC

Original Instructions

MM501DC Moisture Meter

SAFETY INSTRUCTIONS

Read the enclosed safety warnings, the additional safety warnings and the instructions. Save the safety warnings and the instructions for future reference.
The following symbols are used in the user manual or on the product:
Read the user manual.
Denotes risk of personal injury, loss of life or damage to the tool in case of non-observance of the instructions in this manual.
The product is in accordance with the applicable safety standards in the European directives.

GENERAL POWER TOOL SAFETY WARNINGS

To operate this device safely, the user must have read and understood these instructions for use before using the device for the first time.
Observe all safety instructions! Failure to do so may cause harm to you and others.
Retain all instructions for use, and safety instructions for future reference.
If you sell or pass the device on, you must also hand over these operating instructions.
The device must only be used when it functions properly. If the product or part of the product is defective, it must be taken out of operation and disposed of correctly.
Beware of the sharp pins, they can cause personal injury or injury to others.
Check calibration before use.
Operate the device properly, conductive material such as salts, carbon and metal can give false positive readings.

Using battery-operated devices

Only use batteries approved by the manufacturer.
Danger of fire! Never charge the batteries.
Keep batteries away from metal objects that could cause short circuiting when not in use. There is a risk of injuries and fires.
Fluid can escape from the battery when used incorrectly. Battery fluid may result in skin irritations and burns. Avoid contact! In the event of accidental contact, rinse thoroughly with water. Immediately seek the aid of a physician in the event of eye contact.

MACHINE INFORMATION

Intended use
The moisture meter is designed for use in woodworking, water damage restoration, building construction and home renovation.
Examples include:

Checking for moisture and mold on or below the surface of carpets and subflooring;
Measuring the moisture content of wood, drywall or cement board before painting, wallpapering, sealing or treating;
Locating water leaks above ceilings, below floors or behind walls;
Selecting dry lumber, for example firewood. Improper use may damage the tool.

TECHNICAL SPECIFICATIONS

Model no.	MM5O1DC
Measurement Ranges	5 to 50% for wood

1.5 to 33% for building materials
Measurement Accuracy| ±2% for wood and building material
Measurement Resolution| 0.1%
Calibration Check Range| 17.3% to 19.3%
Excessive-moisture alarm levels| >16% for wood

20% for building materials
LCD Size| 51mm diagonal, with three 13mm high digits
Bar Graph Composition| 3 each green, orange and red LEDs
Auto Power Off Trigger| 1 minute of inactivity
Low Battery Icon Trigger| <7V
Operating Temperature| 0° to 40°C
Operating humidity| <70%RH non-condensing
Storage Temperature| -10° to 50°C
Storage humidity 5 % -95% RH| (without battery)
Dimensions| 174 x 70 x 74mm
Weight| 150g without battery
Power Source| (1) ‘9V’ battery (included) 9V 6F22 or 6LR6 recommended

DESCRIPTION
The numbers in the text refer to the diagrams on page 2.

On/off button.
HOLD button
MODE button
LED bar graph
High-contrast, white-on-black LCD
Removable pin cover
Battery cover
Moisture level readout
Indicates wood measurement mode
Indicates operation in pin mode
Indicates building material measurement mode
Low battery charge indication
Indicates a held measurement
Measurement pin covers
Measurement pins
Calibration holes

ASSEMBLY

Inserting / Replacing the Battery (Fig. B)
The moisture meter is powered by a ‘9V’ battery (included in the package).

Push the tab on the battery cover (7) gently until it pops open.
lnsert battery with correct polarity according to battery cover indications.
Close the battery compartment cover (7).

To extend battery life in both operating modes, the moisture meter automatically 1) dims the brightness 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.

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 conductance 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 EDs 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).

Material modes (Fig. A, C)
The MODE button (3) on the front panel provides a convenient way to switch between testing wood and building materials. When the moisture meter is powered on, it automatically enters wood measurement mode. To switch between modes, briefly press the mode button (3). The moisture meter automatically selects the WME% moisture measurement of wood or building material. Measuring wood (Fig. A, C, D)

Power on the moisture meter. The LCD will display the word WOOD (9) and the pin-mode icon (10).
Remove the pin cover (6).
Remove the black rubber insulating sleeves from the pins.
Carefully press the test pins into the sample. Its absolute moisture level will be displayed as a percentage, with the unit %WME (8). Simultaneously, the bar graph LEDs (4) will illuminate to mirror the digital reading.

Note: In wood measurement mode, the available moisture level range is 5% to 50%. When the level is below 5%, the LCD will show . When it is above 50%, the LCD will show ____ .

Measuring building materials (Fig. A, C, D)

Power on the moisture meter.
Press the MODE button (3) to change the indication on the top line of the LCD from WOOD to BLDG (11).The LCD will also display the pin-mode icon (10).
Remove the pin cover (6).
Remove the black rubber insulating sleeves from the pins. Carefully press the test pins into the sample. Its absolute moisture level will be dis- played as a percentage, with the unit %WME (8).

Note: In building material measurement mode, the available moisture level range is 1.5% to 33%. When the level is below 1.5%, the LCD will show .
When it is above 33%, the LCD will show ____ .

Hold function (Fig. A, C)
To hold a digital reading, briefly press the HOLD button (2) within one minute of making the measurement.
The LCD will add the word HOLD (13) to the digital reading, and the bar graph LEDs (4) will “freeze” in their current state (illuminated or not). To start a new measurement, simply press the HOLD button (2) again.

Excessive-moisture alarm (Fig. A, C)
Whenever a test sample is determined to be “wet” (above 16% moisture content for wood, or above 20% for a building material), one or more red LEDs (4) will illuminate and the meter will produce an audible alarm. The alarm will continue to sound until the test pins are removed from the sample, or moved to a drier area. To silence the excessive-moisture alarm or re-enable it, press and hold the HOLD button (2) for at least three seconds. Calibration (Fig. A, E) Although the moisture meter automatically calibrates each time it is powered on, you can also manually check its calibration. Perform a calibration check whenever the meter cannot produce a reading, or if multiple measurements of the same sample produce very different readings. To manually check calibration:

Power the meter on
Open and remove the pin cover (6)
Flip the cover over and insert the test pins (15) into the calibration holes (16) through the top of the cover. The LCD should show a value
between 17.3% and 19.3%.

Note: If the reading is outside this range, please contact VONROC customer service.

Hints for optimum use
Ideally, your test sample should be at least 9.5mm thick. That is the thickness for which the meter is calibrated. If your sample is too thin, readings may be inaccurate.
Measurements of wood are influenced 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.

MAINTENANCE

Clean the machine casings regularly with a soft cloth, preferably after each use. Make sure that the ventilation openings are free of dust and dirt. Remove very persistent dirt using a soft cloth moistened with soapsuds.
Do not use any solvents such as gasoline, alcohol, ammonia, etc. Chemicals such as these will damage the synthetic components.

ENVIRONMENT
Faulty and/or discarded electrical or electronic apparatus have to be collected at the appropriate recycling locations.

Only for EC countries
Do not dispose of power tools into domestic waste.
According to the European Guideline 2012/19/EC for Waste Electrical and Electronic Equipment and its implementation into national right, power tools that are no longer usable must be collected separately and disposed of in an environmentally friendly way.

WARRANTY

VONROC products are developed to the highest quality standards and are guaranteed free of defects in both materials and workmanship for the period lawfully stipulated starting from the date of original purchase. Should the product develop any failure during this period due to defective material and/or workmanship then contact VONROC directly.

The following circumstances are excluded from this guarantee:

Repairs and or alterations have been made or attempted to the machine by unauthorized service centers;
Normal wear and tear;
The tool has been abused, misused or improperly maintained;
Non-original spare parts have been used.

This constitutes the sole warranty made by company either expressed or implied. There are no other warranties expressed or implied which extend beyond the face hereof, herein, including the implied warranties of merchantability and fitness for a particular purpose. In no event shall VONROC be liable for any incidental or consequential damages. The dealers remedies shall be limited to repair or replacement of nonconforming units or parts.

The product and the user manual are subject to change. Specifications can be changed without further notice.

DECLARATION OF CONFORMITY MM501DC -MOISTURE METER
We declare under our sole responsibility that this product is in conformity with directive 2011/65/EU of the European parliament and of the council of 8 June on the restriction of the use of certain hazardous substances in electrical and electronic equipment is in conformity and accordance with the following standards and regulations:

2011/65/EU, 2012/19/EU, 2014/30/EU, EN 61326-1, EN 61326-2-2

Zwolle, 01-11-2022

H.G.F Rosberg
CEO

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2211-17