REED ST-129 Manual de usuario

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Model ST-129

Wood Moisture Meter

Instruction

Manual

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Table of Contents

Features......................................................................................... 3

Specications................................................................................ 3

Operating Instructions................................................................4-9

Taking a Measurement ................................................................ 4

Measuring Without Temperature Probe ....................................... 4

Automatically Temperature Corrected (ATC) .............................4-5

Auto Power-Off Set-up................................................................ 5

Calibration Check........................................................................ 5

Care and Maintenance................................................................ 5

Calibration Table for Wood .......................................................... 6

Common Timber Species .......................................................7-9

For service on this or any other REED product or information on other

REED products, contact REED Instruments at [email protected]

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Features

• Measure moisture content in wood either directly with the built-in

moisture pins or use the remote hand-press probe (included) on hard

surfaces

• Automatic Temperature Compensation when used with included

temperature probe improves accuracy of moisture measurements

• Memory contains 8 wood groups with calibrations for approximately

170 species of wood

• Built-in 2-point calibration check

• User settable Auto Power-Off with override

• Low battery indicator

Specifications

Measuring Principle: Electrical resistance

Measuring Range: 6 to 99.9% MC

Accuracy: ±1% MC

Moisture Electrode: 8mm long replaceable contact pins

Temp. Compensation: -31 to 176°F (-35 to 80°C)

Power Supply: 2 x AAA batteries

Dimensions: 7 x 1.9 x 2” (180 x 50 x 31mm)

Weight: 6.1 oz (175g)

Includes: Remote hand-press moisture probe,

temperature probe, protective cap,

replacement pins, two AAA batteries,

and a soft carrying case

Optional Accessories: Replacement pins (model ST-129-P)

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Operating Instructions

This instrument is a conductivity moisture meter specically designed for

the timber industry. This instrument has eight calibration scales enabling

the user to take accurate moisture measurements in 150 wood species.

Moisture measurements can be taken using the integral pin electrodes

or by using the heavy-duty moisture probe. When used with the tem-

perature probe the moisture measurements are automatically corrected

with respect to the ambient temperature. This instrument is switched ON

by pressing the button and switched OFF by pressing the button

for approx 3 seconds. The default auto power-off for this instrument is 5

minutes but can be set manually (see auto power-off set-up).

Taking a Measurement

Remove the cap to expose the needle electrodes or connect the heavy-

duty moisture probe on the right hand side of this instrument and switch

the instrument on by pressing the button. Select the appropriate wood

calibration scale (A, B, C, E, F, G, H or J) by referring to the enclosed

wood calibration table (see calibration table for wood and common

timber species) and by pressing the button. Push the needle pins or the

heavy-duty moisture probe pins into the wood and observe the reading in

the LCD display.

Measuring Without Temperature Probe

This instrument is calibrated for wood at 20°C (68°F). In general, timber

that is hotter than 20°C will give higher readings and timber colder than

20°C will give lower readings. An approximate manual correction of 0.5%

moisture content per 5°C may be subtracted from timber that is above

20°C. For timber that is below 20°C, a manual correction of 0.5% mois-

ture content per 5°C may be added to the measured value.

Automatically Temperature Corrected (ATC)

Switch the instrument ON and select the appropriate wood calibration

scale as detailed in ‘Taking a Measurement’. Using a hammer and nail of

nominal 3mm diameter, make a hole in the wood to be tested. Remove

the nail and push the temperature probe into the hole until the tip is at the

required depth. continued ...

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Connect the temperature probe into the instrument via the temp socket.

Using the instrument to measure timber you can obtain the automati-

cally temperature corrected (ATC) moisture value. If you need to read

the current temperature of the timber press the button, then the LCD

will display the temperature. Press the button again and the LCD will

display the other °C or °F temperature. Press the button and the LCD

will display the moisture value again.

Auto Power-Off Set-up

To change the default auto power-off times press the and buttons

together. Hold the button and press the button to change the auto

power-off time (to either disable the auto power-off or to set it from 1 to 9

minutes) by changing the code.

0 disables the auto power-off function, 1 sets the instrument to auto

power-off in one minute, 2 sets it to two minutes, 3 to three minutes, and

respectfully up to 9 for nine minutes for the instrument to auto power-off.

Calibration Check

There are two checked calibrators in the cap of this instrument. When

checking the calibration, the A scale should be selected and the tempera-

ture probe must be disconnected. Use the needle to touch the two poles

of calibrator. If correctly calibrated, the instrument will register %H2O

values in the range 17.7 to 18.3 (at the “T” calibration) and in the range

25.5 to 26.5 (at “B” calibration). If the range is over +/-1 the Instrument

can’t accurately measure the moisture of timber. Open the back cover and

adjust the rheostat to make the tolerance meet the range.

Care and Maintenance

When the instrument is not in use, keep it in its pouch together with its

accessories. Store the kit in a stable, dust-free environment out of direct

sunlight. Remove the batteries from the instrument if it is to be stored for

periods of more than one month, or when the battery symbol appears on

the display. Be sure to check the condition of the accessories used with

this instrument on a regular basis and replace them if they become worn

or damaged.

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Calibration Table for Wood

The calibration data in the below table is based on standard tests by oven

drying commercial samples of the various wood species, between 7%

and ber saturation. Above ber saturation point (25%-30%) readings are

approximate and only generally apply to wood that has been dried and

re-hydrated. Readings higher by 1%-2% may be obtained where wood

has been impregnated with a water-borne preservative. High readings

obtained with some plywood of peculiar composition must be treated with

caution. For measuring building materials select scale A and refer to the

following table so you can obtain the building material moisture value.

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Common Timber Species

Cypress, Japanese (18-28%mc) C Guarea, White H

Spruce, Japanese (18-28%mc) C Santa Maria H

Cypress, Japanese (8-18%mc) J Cedar, WestIndian J

Spruce, Japanese (8-18%mc) J Mahogany, West Indian B

Meranti, Red (dark/light) B Birch, European J

Redwood, Baltic (European) A Cherry, European J

Spruce, Norway (European) C Empress, Tree J

Ash, European A Fir, Noble J

Ash, Japanese A Guarea, Black J

Banga Wanga A Kauri, Queensland J

Birch, Yellow A Mahogany, African J

Boxwood, Maracaibo A Queensland Kauri J

Fir, Grand A Walnut, African J

Gum, Spotted A Cordia, American Light F

Maple, Pacific A Pine, American long leaf C

Maple, Rock A Pine, American pitch C

Maple, Sugar A Pine, Caribbean Pitch C

Myrtle, Tasmanian A Pine, Nicaraguan Pitch C

Oak, European A Cedar, Western Red C

Oak, Japanese A Gum, American Red A

Panga Panga A Oak, American Red A

Pine, Lodgepole A Oak, American White A

Pine, Scots A Kauri, New Zealand E

Pine, Yellow A Pine, New Zealand White B

Poplar, Black A Abura E

Pterygota, African A Afara A

Rosewood, Indian A Aformosa G

Sterculia, Brown A Afzelia E

Walnut, American A Agba J

Camphorwood, E African C Amboyna G

Cypress, E African A Ayan C

Olive, E African B Balsa A

Silky Oak,African C Basswood G

Silky Oak,Australian C Berlina B

Ash, American B Binvang E

Canarium, African B Bisselon E

Cedar, Japanese B Bitterwood F

Douglas Fir B Blackbutt C

Fir, Douglas B Bosquiea A

continued ...

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Gum, Saligna B Chestnut C

Gum, Southern B Coachwood G

Maple, Queensland B Dahoma A

Meranti, White B Danta C

Pine, Bunya B Erimado F

Pine, Huon B Greenheart C

Pine, Maritime B Gurjun A

Pine, Parana B Hiba J

Pine, Red B Hickory F

Redwood, Californian B Hyedunani B

Pine, Japanese Black B Iroko F

Beech, European C Ironbank B

Hemlock, Western C Jarrah C

Larch, European C Jelutong C

Larch, Japanese C Karpur A

Oak, Tasmanian C Karri A

Pine, Corsican C Keruing F

Pine, Hoop C Kuroka A

Pine, Ponderosa C Lime E

Pine, Radiata C Loliondo C

Pine, Sugar C Makore B

Queensland Walnut C Mansoia B

Seraya, Red C Matai E

Spruce, Sitka C Merbau B

Stringybark, Messmate C Missanda C

Stringybark, Yellow C Muhuhi J

Walnut, European C Muninga G

Walnut, Queensland C Musine J

Elm, English E Musizi J

Elm, Rock E Naingon C

Elm, White E Obeche G

Oak, Turkey E Odoko E

Pine, Kauri E Okwen B

Baguacu, Brazilian FOlivillo G

Larch, Western F Opepe H

Padauk, African FPadang A

Elm, Japanese Grey Bark B Persimmon G

Walnut, New Guinea B Pillarwood F

Gegu, Nohor H Pyinkado E

Rubberwood H Ramin G

continued ...

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Notes _________________________________________

________________________________________________

For service on this or any other REED product or information on other

REED products, contact REED Instruments at [email protected]

Rubberwood H Totara E

Sapele C Turpentine C

Sen A Utile J

Sycamore FWawa G

Tallowwood A Wandoo J

Teak FWhitewood C

Yew C

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Notes _________________________________________

________________________________________________

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