Delmhorst TechCheck PLUS Manual de usuario

TechCheck PLUS

MOISTURE METER

Owner’s Manual

Version 1.0

For TechCheck Meters starting with Serial #12160

Delmhorst Instrument Co.

Rev 3

February 2, 2010

Page 2of 33

TABLE OF CONTENTS

PAGE

GENERAL DESCRIPTION & FEATURES 3

OPERATING INSTRUCTIONS 4

INSTALLING THE BATTERY 4

TO POWER THE METER ON 5

TO TAKE WOOD READINGS 5-6

TO TAKE DRYWALL READINGS 6

TO TAKE SCAN READINGS 6-7

TO SET THE ALARM IN WOOD, DRYWALL, SCAN MODE 7

MAIN MENU OPTIONS 8

TAKING A READING –PRACTICAL APPLICATIONS 9

TESTING WOOD 9

PAINT FAILURE AND MOISTURE 9

EIFS 9-10

TESTING CONCRETE 10-11

TESTING INSULATION 11

TESTING DRYWALL 11

CARE OF YOUR METER 12

SERVICE FOR YOUR METER 13

WARRANTY 14

SPECIES CORRECTION TABLE 15-16

OWNER’S MANUAL IN SPANISH

(MANUAL DEL PROPIETARIO EN ESPANOL)17

Page 3of 33

GENERAL DESCRIPTION & FEATURES

Thank you for your purchase of Delmhorst Instrument Co’s newly designed TechCheck Plus

handheld moisture meter. The TechCheck Plus offers the latest in features and functionality and

is intuitive and easy to operate. We recommend that you read the following pages in detail to

take full advantage of all that the TechCheck Plus has to offer.

Outstanding Features:

•Pin mode

o6%-60% wood scale (Douglas Fir)

o0.1% -6% drywall scale

•Scan Mode

o0-300 numerical reference scale

•Other Features:

oSpanish Language Option

oBuilt in back-light makes reading in dark places a cinch

oAlarm lets you know when your pre-selected moisture threshold is reached

oHold readings on-screen to makeeven the most demanding inspection more

manageable

oAuto shutoff timer saves battery life

oRugged construction ensures years of reliable use

oSturdy plastic carrying case

o9-V Battery

o1 year warranty

Page 4of 33

OPERATING INSTRUCTIONS

-User Guide-

This guide provides step-by-step instructions on powering up, using and powering down the

meter.

NAVIGATION:

The meter uses an on-screen, menu-driven approach to navigate through the meter features,

allowing for an intuitive understanding of keypad functions. Each screen presents the user with a

number of selectable options. One of the options is always selected and the user can move

(navigate) the selection to any other available option. The keypad is aimed at providing

navigational control, and not at accessing specific features. There are four directional keys

aligned intuitively around a middle (fifth) key (see Figure 1): Above (UP), below (DOWN), to the

right (RIGHT) and to the left (LEFT). The middle key is used to SELECT the option highlighted on

the screen. For purposes of this owner’s manual, the five keys will be referred to as

ï ð ñ ò and SELECT.

INSTALLING THE BATTERY:

The battery compartment is located on the underside of the case, at the bottom of the handle.

1. Open the battery compartment by sliding the lid back while pressing on the release indent.

2. Ensure correct polarity, and push the battery in flush with the bottom board until the

connectors snap together on both sides.

3. Replace the battery compartment lid.

LOW BATTERY:

The meter features a battery status monitor, designed to warn the user as well as protect

measurement accuracy from impending battery failure conditions. The battery warning is

triggered by either continuous or temporary low voltage conditions. Visible (a battery icon on the

top right side of the display) and audible (buzzer warble) indicators accompany a battery warning.

Once a permanent low battery condition is detected, all measurement functions are disabled. The

battery should be replaced immediately. If the battery reaches critical levels, the meter will refuse

to stay on at power-up. This gradual warning system is intended to provide the user advanced

battery status notice and give ample time for replacement before operational limitations occur.

NOTE: Current meter settings are not lost during battery replacement or low battery conditions.

Page 5of 33

TO POWER THE METER ON:

To turn the meter on, press and hold the SELECT button for approx. 2 seconds.

The first screen will temporarily display the meter name and the software revision level.

Refer to this revision level whenever you call Customer Service.

The next screen is the MAIN MENU. Use the ï ð ñ ò keys to select the desired

function/mode and then press SELECT to activate the function.

METER USE

TO TAKE WOOD READINGS:

1. From the Main Menu, use the òkey to highlight WOOD. Then, use the SELECT key

to enter the WOOD screen.

2. The meter will display the WOOD screen, as shown below:

Page 6of 33

3. Push the contact pins into material to be tested. Any Delmhorst electrode may also be

used in WOOD mode by simply attaching it to the connector next to the contact pins.

4. The unit will read %MC on a wood scale between 6% and 60%. At elevated wood

temperatures, a reading above 30 percent is valid if the temperature-corrected reading

falls below 30 percent. Otherwise, these high readings provide relative comparisons,

indicating that the material is taking on or losing moisture.

5. To hold a reading on-screen, press the HOLD (SELECT) KEY. Press the HOLD

(SELECT) KEY again to return to measuring mode.

6. Use the òkey to highlight EXIT. Then, use the SELECT key to return to the MAIN

MENU when finished.

NOTE:The TechCheck Plus is calibrated to give %MC readings on Douglas Fir. If you are

taking readings on other species of wood, refer to the species correction chart.

TO TAKE DRYWALL READINGS:

1. From the Main Menu, use the ò key to highlight DRYWALL. Then, use the SELECT

key to enter the pin mode.

2. The meter will display the DRYWALL screen, as shown below:

3. Push the contact pins into material to be tested. Any Delmhorst electrode may also be

used in DRYWALL mode by simply attaching it to the connector next to the contact pins.

4. The unit will read %MC on a drywall scale between .1% and 6%.

5. To hold a reading on-screen, press the HOLD (SELECT) KEY. Press the HOLD

(SELECT) KEY again to return to measuring mode.

6. Use the ò key to highlight EXIT. Then, use the SELECT key to return to the MAIN

MENU when finished.

TO TAKE SCAN READINGS:

1. From the Main Menu, use the ñ ò key to highlight SCAN. Then, use the SELECT

key to enter the SCAN mode.

2. The meter will display the SCAN screen, as shown below:

Page 7of 33

3. You may begin taking readings by firmly pressing the back of the meter onto the

material to be tested. This will display a relative reading that ranges between 0 and 300.

4. To hold a reading on-screen, press the HOLD (SELECT) KEY. Press the HOLD

(SELECT) KEY again to return to measuring mode.

NOTE:The SCAN mode will give relative readings only, not %MC. The numbers displayed

represent the relative dryness or wetness of the material on a scale of 0 to 300. In

order to accurately interpret your readings, first establish a baseline reading by taking

a reading in an area you know to be unaffected or dry, then take a reading in the

affected or wet area and compare the two readings.

TO SET THE ALARM FOR WOOD, DRYWALL, OR SCAN MODE:

1. If you wish to set the alarm, to beep after a pre-selected value is reached for WOOD,

DRYWALL, or SCAN use the ñ ò keys from the MAIN MENU screen to highlight the

ALARM. Press the SELECT key to enter the alarm sub menu.

2. The default status of all alarms is “OFF.” Press the HOLD (SELECT) key on the

desired alarm to turn it on.

3. After the alarm is turned on, use the ðkey to increase the alarm value, and the ïkey to

decrease alarm value.

4. After you have selected the alarm value, use the òkey to highlight EXIT. Press the

center HOLD (SELECT) key to return to MAIN MENU.

5. The chosen alarm value will be displayed on the WOOD, DRYWALL, or SCAN mode

screen and an audible alarm will sound if that value is reached.

Note: Default alarm settings are: WOOD -15% DRYWALL –1%, SCAN -300.

Page 8of 33

MAIN MENU OPTIONS:

•ENGLISH / ESPANOL:

This option will toggle the displayed language. Pressing SELECT key on this

option when displayed as ESPANOL will change all displayed meter text to the

Spanish language. Pressing the SELECT key on this option when displayed as

ENGLISH will change all displayed meter text to the English language.

•DEFAULTS:

This will delete all defined parameters and readings stored in the meter. The

meter will be now set to the factory parameters: English, Wood Alarm 15% and

OFF, DRYWALL Alarm 1% and OFF, SCAN Alarm 300 and OFF.

•OFF:

This menu option will power down the meter.

Page 9of 33

TAKING A READING –PRACTICAL APPLICATIONS

The following application notes are intended for use with the meter in PIN

MODE except where otherwise indicated.

TESTING WOOD:

The contact pins provided are best for materials up to 6/4. On materials over 6/4 or for

hardwoods over 4/4 we recommend using a remote probe such as the 26-ES ram-type electrode.

Mount the 26-ES directly to the external connector. To take a reading, align the contact pins

parallel to the grain and push them to their full penetration into the wood, if possible. Insulated

pins read only at the tip and can be driven to the desired depth.

PAINT FAILURE AND MOISTURE

Moisture is by far the most frequent cause of paint failure. The key to preventing paint failure is to

insure that moisture is not absorbed through the wood to the back of the paint film. So, in order to

insure quality paint jobs, wood must remain dry after the application of paint.

Outdoor wood can be safely painted without danger of peeling if the %MC is 15% or less. In drier

climates, the maximum reading should be 10% to 11%. Indoor wood should be between 7% and

8% prior to painting.

The following conditions may cause high moisture content in wood:

⇒Leaky gutters and down spouts

⇒Leaky pipes or condensation on cold water lines in attic or hollow walls

⇒Faulty flashing around windows, doors and where porch and dormer roofs meet sidings

⇒End-grain wood that is not sealed with paint at all joints around windows, corners, and butt

joints

⇒Porch columns that do not have good drainage and ventilation where they rest on porch

floors

⇒Siding or any other wood that is in contact with the ground may absorb moisture

⇒Siding and shingles without sufficient lap so that water is forced up through cracks by wind

pressure

⇒Ice dams

⇒Condensation of vapor within hollow walls

EIFS (Exterior Insulation & Finish Systems)

Moisture intrusion problems in EIFS (also known as synthetic stucco) stem from leaking window

frames, improper use of or lack of sealant, and faulty installation of flashing.

If you suspect a problem take a visual inspection. Look for gaps around windows, doors, air

conditioning units, light fixtures, hose bibs, dryer vents and other areas of potential penetration.

Also look for visible signs of water damage. If you feel a problem exists, use the 21-E electrode.

This electrode uses the 608 -(4") insulated pins or 608/001 (7”) insulated pins.

Procedure:

⇒Drill two 1/4" holes about ¾” apart at an upward 45° angle.

⇒Push the 21-E Electrode into the holes through the polystyrene and into the substrate and

read the moisture content on the meter scale. When used on materials other than wood, the

Page 10 of 33

meter’s PIN mode will give relative readings only, not %MC. The numbers displayed

represent the relative dryness or wetness of the material on a scale of 5 to 60. In order to

accurately interpret your readings, first establish a baseline reading by taking a reading in an

area you know to be unaffected, then take a reading in the affected area and compare the

two readings.

TESTING CONCRETE SLABS FOR FLOORING APPLICATIONS

Moisture meters are an effective tool to check moisture in concrete. They can tell you where there

may be excess moisture and help determine if you need to conduct further testing.

It is important to test both the surface and mid-section of the slab, especially if the slab is on or

below grade. This will help determine if there is continuous moisture migration toward the

surface. If this condition exists, the moisture movement may be so slow that once it reaches the

surface, moisture evaporates and causes a “dry” reading when a surface test is made.

However, if a sub-surface test is made, the meter may read “wet” indicating the presence of

moisture. When the slab is covered and the upward movement of moisture continues, moisture

will move into a hygroscopic (wood) floor, or build-up pressure under a non-breathing synthetic

floor, causing delamination.

Taking a surface reading:

USING PIN MODE

ØDrive two hardened-steel masonry nails about 3/4" apart into the finish coat of

concrete floor. Drive them about 1/8" deep so they make firm contact with the concrete

and do not move when touched.

ØTouch the nails with the contact pins. Remember that when used on materials other

than wood, the meter’s PIN mode will give relative readings only. Establish a baseline

reading by taking a reading in an area you know to be unaffected, then take a reading in

the affected area and compare the two readings.

USING SCAN MODE

ØFirst establish a benchmark. Take readings in areas that you know are dry, or

acceptable.

ØTake readings on areas that are wet. These “dry to wet” readings can be used as

reference points against which subsequent readings are compared. Understanding the

meter’s behavior on a particular material, along with these comparative readings, your

experience, and visual clues will all help determine the overall condition. All readings

should be evaluated in the light of factors such as type of paint, type of construction, and

climatic conditions.

Subsurface test:

ØDrill two 1/4" holes, 3/4" apart and 1/2" to 2" deep.

ØDrive the masonry nails into the bottom of the holes and make the tests as described

above. Nails must not touch sides of drilled holes.

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