Delmhorst TechScan Manual de usuario

TechScan™ v.1.1

Owner’s Manual

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TABLE OF CONTENTS

INTRODUCTION ………………………………………………………………..…….…….…2

SWITCH KEY FUNCTIONS ………………………………………………………..……....3

OPERATION……………………………………………………………………………...…….4

TIPS FOR USING TECHSCAN TO MEASURE WOOD………………………….….…….5

TIPS FOR USING TECHSCAN TO MEASURE RELATIVE MOISTURE…….…….…....6

CARING FOR YOUR METER…………………………………………………….……….….8

SERVICING YOUR METER ……………………………………………………….…….…....8

WARRANTY…………………………………………………………………..…….…………..8

ADDENDUM …………………………………………………………………………………..10

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TechScan™

VERSION 1.1

OWNER’S MANUAL

INTRODUCTION

Thank you for purchasing TechScan, a multi-purpose meter that can be used in many

applications including water damage restoration, home inspection, indoor air quality,

woodworking, flooring installation. TechScan provides a fast, effective way to identify

moisture problems and determine if further action must be taken.

TechScan is a capacitance-type moisture meter with patented sensor technology, using

the relationship between the moisture content and the dielectric properties of the

material under test. When the meter is placed on wood or other hygroscopic building

material, an electro-magnetic field penetrates approximately ¾ to 1 inch into the

material. The meter reading represents a biased average, with the MC nearest to the

sensor having the greatest effect.

If you require a more complete evaluation of moisture conditions or need to penetrate

through flooring, check behind drywall, or test lumber over 1-1/2” thick, we recommend

using TechScan in conjunction with a Delmhorst resistance (pin-type) moisture meter.

TechScan has two reading scales:

Wood :5%-30% MC range for wood. Select when testing wood materials, such as

flooring, trim, construction lumber, exterior siding.

Reference: 0-100 scale for non-wood hygroscopic materials. The numbers on

this scale are relative, or qualitative indications of moisture levels –not %

moisture content. Select when testing building materials such as drywall, concrete,

plaster, EIFS, etc. Readings in the low end of the scale usually indicate a drier

condition; readings in the upper end of the scale usually indicate a higher moisture

level in the material.

To establish a benchmark or “dry standard” for the material you are measuring, first

take readings in areas that you know are dry, or acceptable. Then take readings on

areas that you know are wet. These “dry to wet” readings should be used as the

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reference points against which subsequent readings are compared. One should not

expect that the reference scales for meters of different brands and types (resistance

/capacitance) will read alike on the same material. The benchmark may be different

from one meter type/brand to another because a given meters’ response depends

on the material used for calibration and on the meter’s range.

SWITCH KEY FUNCTIONS

1. On/Hold Key: Press to turn meter on, resume reading after checking calibration

or setting alarm, or hold current reading if pressed while reading. (There is a

slow beeping sound while holding a reading.)

2. Cal Check Key: Press and hold this key while in Read mode to check

calibration.

3. Scale Key: Press to select Wood scale or Reference scale.

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4. Down Arrow Key: Press and hold to decrease the alarm setting.

5. Up Arrow Key: Press and hold to increase the alarm setting.

OPERATION

Checking the Battery and Calibration

The meter automatically checks the battery level when it is turned on. If the

battery voltage is not high enough for reliable operation, all indicators will flash

for a few seconds. Replace the battery with a new one (9v alkaline).

To check the meter’s calibration, turn the meter on. Press and hold the Cal

Check key. Hold the meter in the air so that only the internal reference is read.

The meter must read within the blue calibration check band. If the meter reads

out of calibration refer to the Service for Your Meter section (pg8).

Taking a Reading

Press the On/Hold key to turn the unit on.

Press the Scale key to select the Wood or the Reference scale.

When the meter is set to wood, the panel meter wood scale is calibrated to show

%MC based on the average specific gravity of Douglas Fir (0.46).

When the meter is set to the reference scale, the meter switches to a lower

sensitivity mode which is suitable for a wide range of materials.

Press the On/Hold key while reading to hold (or freeze) the current reading. The

meter will beep slowly and continue to hold the reading until the On/Hold key is

pressed again.

The alarm (fast beep) will sound whenever the current reading is above the alarm

setting.

Setting the Alarm

With the meter turned on, press the Up or Down arrow keys to adjust the alarm

setting. When the Alarm Setting is being adjusted, the Alarm Setting indicator

lights and the panel meter shows the alarm setting.

The range of alarm settings is 5.0 to 30.0 for wood and 1 to 100 for the reference

scale. The meter stores separate wood and reference alarm settings.

To turn the alarm off, use the Up key to adjust the alarm setting beyond the end

of the scale. The Alarm Setting indicator flashes when the alarm is turned off.

Exit the Alarm Setting mode by pressing the On/Hold key.

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Auto Shut-off

The meter automatically turns off when no keys are pressed for three minutes.

Five seconds before the meter turns off, the beeper will sound and the active

Scale indicator will flash.

To prevent the meter from turning off, press any key before the meter turns off.

HELPFUL TIPS FOR USING TECHSCAN TO MEASURE MC IN WOOD:

Set the scale to “Wood”.

The entire sensor plate should be in contact with the surface of the board.

The sensor plate measures 2-1/2” x 3-1/2”.

Readings obtained with TechScan and pin-less moisture meters in general,

are affected by the amount of pressure applied to the material. Apply and

maintain uniform, firm pressure to the meter when taking readings.

The meter’s RF signal penetrates to ¾” – 1”. When measuring thinner

material, some materials underneath the wood may influence the readings.

Place a piece of glass, rubber or styrofoam under the sample to avoid false

readings. Test the insulating material with the meter first to confirm it provides

the necessary insulation.

The meter works best on smooth lumber and surfaces. Rough, uneven, or

cupped boards yield lower readings due to the air pockets between the

sensor plate and the surface. Avoid readings on knots or splits.

Surface moisture slightly increases the readings. Wipe obvious moisture from

the board surface to minimize this effect.

The meter is influenced by a moisture gradient but cannot detect it. If you

suspect a gradient, use a Delmhorst resistance-type meter with insulated pins

to determine if a normal gradient (wet core to drier outer surface) is present or

if surface moisture has just soaked into the board.

Before installing a wood floor, if possible allow the flooring to acclimate in its

environment for several days before installation. During this period, check

both the floor and the sub floor to ensure that moisture levels of both

materials remain stable and are within recommended MC guidelines.

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The “right” moisture content depends on the final use of the wood and is

climate-driven. Recommended moisture content for indoor woodworking /

furniture ranges from 6%-9%. Outdoor construction grade lumber is usually

19% or less; 10%-15% for safe painting or staining.

Corrections for Specific Gravity (SG)

Measurements obtained with capacitance type moisture meters such as TechScan are

greatly influenced by the specific gravity of the material (specifically the wood) being

measured. Materials with higher specific gravity produce higher moisture readings than

materials with lower specific gravity at the same moisture content. Since TechScan is

calibrated for wood at a specific gravity (SG) of 0.46, a correction is required when

measuring wood species with SG values other than 0.46. At the end of this manual you

will find a listing of common species with published average values for SG and also a

table to correct meter readings for wood species. Use these values with the knowledge

that specific gravity varies within a single species and may even vary within the same

board. The following resources can be helpful if you are working with a species that is

not included in these tables. When referring to published data use the SG values based

on green volume and oven-dry weight (sometimes referred to as “green basis”).

HELPFUL TIPS FOR USING TECHSCAN TO MEASURE RELATIVE MOISTURE

LEVELS IN NON-WOOD MATERIALS:

Set the scale to “Reference”. The 0-100 reference scale is for relative

wet/dry indications only. These numbers do not represent %MC.

The entire sensor plate should be in contact with the surface of the material

being measured. The sensor plate measures 2-1/2” x 3-1/2”.

Readings obtained with TechScan and pin-less moisture meters in general,

are affected by the amount of pressure applied to the material. Apply and

maintain uniform, firm pressure to the meter when taking readings.

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The meter’s RF signal penetrates to ¾” – 1”. Material underneath or behind

the surface being tested may influence the readings. This includes metal

studs, wiring, and in the case of concrete, rebar and aggregate.

The meter works best on smooth, clean surfaces. Surface moisture slightly

increases the readings. Wipe obvious moisture from the board surface to

minimize this effect.

Testing Concrete Slabs for Flooring Applications

Pinless moisture meters can be an effective tool to check comparative

moisture conditions in concrete slabs. They can tell you where there may be

excess moisture and help determine if you need to conduct further testing,

and identify specific areas on which that testing should be performed.

TechScan cannot provide quantitative results as a basis for acceptance of a

slab for installation of moisture-sensitive flooring systems. ASTM Test Method

F2170 (RH using in situ probes), F1869 (calcium chloride), and F2420 (RH on

surface using insulated hood) provide quantitative information for determining

if moisture levels are within specific limits.

Using TechScan In A Water Damage Restoration Or Mold Remediation

Job:

TechScan is a useful tool in identifying moisture in walls, ceilings and floors in

a water restoration or mold remediation. In order to establish pre-loss

conditions, find an area of the building that was not damaged and take

several readings on various materials. This will provide you with a “dry

standard” or target moisture levels when drying damaged areas.

Take several readings on each wall. Pay special attention near the base,

around doorjambs, electrical and plumbing fixtures, and other places where

water may have entered. Use the meter continuously during the drying

process to monitor drying progress.

Testing EIFS (Exterior Insulation and Finishing System):

Moisture intrusion problems in EIFS (synthetic stucco) stem from leaking

window and door frames, improper use of or lack of sealant, and faulty

installation of flashing.

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If you suspect a problem conduct 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 believe a problem exists, use TechScan as a quick scanning

tool to determine the general location of the moisture. Then use a pin- type

meter to better identify exact problem areas and depth of moisture intrusion.

CARE OF YOUR METER:

Store the meter in a clean, dry place. The protective carrying case provided is

an ideal storage place when the meter is not in use.

Change the 9-Volt battery as needed. Continued use with a low battery may

cause the meter to go out of calibration.

Clean the meter with any biodegradable cleaner. Use the cleaner sparingly

and on external parts only.

Remove the battery if the meter will not be used for one month or longer.

SERVICE FOR YOUR METER

If your meter is not working properly, replace the battery with a new one and check the

calibration. If this does not resolve the problem, go to www.delmhorst.com and follow

the instructions under Product Support. If you require further assistance please call 877-

DELMHORST (335-6467) or 973-334-2557.

WARRANTY

Delmhorst Instrument Co., referred to hereafter as Delmhorst, guarantees its TechScan

meter for one year from date of purchase against defects in material or workmanship. If

within the warranty period of the TechScan you find any defect in material or

workmanship return the meter following the instructions in the Service for Your Meter

section. This limited warranty does not cover abuse, alteration, misuse, damage during

shipment, improper service, unauthorized or unreasonable use of the meter. This

warranty does not cover batteries. If the meter has been tampered with, the warranty

shall be void. At our option we may replace or repair the meter.

Delmhorst shall not be liable for incidental or consequential damages for the breach of

any express or implied warranty with respect to this product or its calibration. With

proper care and maintenance the meter should stay in calibration; follow the instructions

in the Care of Your Meter section.

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UNDER NO CIRCUMSTANCES SHALL DELMHORST BE LIABLE FOR ANY

INCIDENTAL, INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES OF ANY

TYPE WHATSOEVER, INCLUDING, BUT NOT LIMITED TO, LOST PROFITS OR

DOWNTIME ARISING OUT OF OR RELATED IN ANY RESPECT TO ITS METERS

OR ELECTRODES AND NO OTHER WARRANTY, WRITTEN, ORAL OR IMPLIED

APPLIES. DELMHORST SHALL IN NO EVENT BE LIABLE FOR ANY BREACH OF

WARRANTY OR DEFECT IN THIS PRODUCT THAT EXCEEDS THE AMOUNT OF

PURCHASE OF THIS PRODUCT.

The express warranty set forth above constitutes the entire warranty with respect to

Delmhorst meters and no other warranty, written, oral, or implied applies. This warranty

is personal to the customer purchasing the product and is not transferable.

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

For more than 70 years Delmhorst Instrument has been the leading manufacturer

of high quality, US-made moisture meters and thermo-hygrometers. Today we

offer a wide range of meters for applications including water damage restoration,

construction, flooring, lumber/woodworking, paper, and agriculture.

Rev July 2017

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