Manual - Extech Instruments
Contents
1. Wood moisture measurements for unknown wood type Note that this method is used for reference only Measurements of known wood types have a higher accuracy than measurements of unknown wood types 1 2 3 4 Turn ON the meter Select Material Group 1 using the Material select button Insert the sensor s test pins into the material under test Insertion should be to at least a 0 08 2mm depth However if this is not possible carefully insert the test pins as far as possible without using undue force The meter display will now indicate moisture content in 4 Model 407777 Version 2 2 Jan 04 Wallboard Moisture Measurements Unlike wood types which have known densities wallboard does not Consequently it is not possible to get an absolute moisture content reading The following procedure can be used to make relative or comparative measurements of the moisture content in wallboard 1 2 3 Turn ON the meter Select Material Group 1 by pressing the Material Select button Insert the sensor s test pins into a known dry area of wallboard Insertion should be to at least a 0 08 2mm depth The meter display will now indicate moisture content in Note this dry reading Insert the sensor s test pins into the wallboard under test Insertion should be to at least a 0 08 2mm depth The meter display will now indicate moisture content in Note this moist reading Compare the dry wallboard re2. User s Guide EXTECH INSTRUMENTS Heavy Duty Wood Moisture Meter Model 407777 LBT PK D H T1 T2 Va mis ce ap ap 02 Cio ll l l REC Max I Cheer l AVG Min 10 ext POWER HOLD MATERIAL Sag RECORD RECALL CALIBRATION OD Oll SSS Moisture Meter 407777 EXTECH INSTRUMENTS Introduction Congratulations on your purchase of the Extech 407777 Wood Moisture Meter This meter measures the moisture content of wood as a percentage Measurements are made using the supplied remote intrusive sensor Careful use of this meter will provide years of reliable service Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment a six month limited warranty applies on sensors and cables If it should become necessary to return the instrument for service during or beyond the warranty period contact the Customer Service Department at 781 890 7440 ext 210 for authorization or visit our website at www extech com click on Contact Extech and go to Service Department to request an RA number A Return Authorization RA number must be issued before any product is returned to Extech The sender is responsible for shipping charges freight insurance and proper packaging to prevent damage in transit This warranty does not apply to defects resulting from action of the user such as misus
3. ading with the moist wallboard reading to determine the moisture content of the wallboard area under test Temperature Compensation This meter is calibrated for use at ambient temperature 68 F 20 C When the temperature is above or below this value manual temperature compensation should be performed to maintain meter measurement accuracy Follow these steps 1 Check that the RECORD function is not engaged REC display icon is off 2 Use the TEMPERATURE ADJUST buttons to increase left button or decrease right button the temperature display to match the new temperature in C The temperature is adjustable in 1 degree steps 3 The value will be stored after 4 seconds Temperature compensation adjustments are not stored in memory when the meter is turned OFF however Data Hold To freeze the LCD display reading press the HOLD key The DH icon will appear on the LCD Press the HOLD key again to return to normal operation the H hold icon will switch OFF Maximum MAX and Minimum MIN Record and Recall To keep track of the highest MAX and lowest MIN measurements follow the procedure below 1 2 3 4 Press the RECORD button to begin tracking the highest and lowest readings The REC display icon will appear on the LCD Press the RECALL key when it is desired to view the highest reading since the RECORD button was pressed The MAX icon will appear on the display and the reading s
4. e improper wiring operation outside of specification improper maintenance or repair or unauthorized modification Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct indirect incidental or consequential damages Extech s total liability is limited to repair or replacement of the product The warranty set forth above is inclusive and no other warranty whether written or oral is expressed or implied Specifications General Specifications Custom one chip LSI microprocessor circuit Dual function 2000 count 0 to 1999 LCD display 19 to 30 Moisture Content 9 memory groups for approx 150 species of wood Front panel push button freezes displayed reading Approx 0 8 seconds Sensor Structure Remote two prong intrusive sensor Memory Record Recall Records Maximum Minimum readings for later recall Auto Power off Meter omatically shuts off after 10 minutes Data Output RS 23 serial interface for use with Model 407001 data acquisition software and interface cable kit Operating Temperature Operating Humidity Power Supply Power Current k 73 Ibs 330g including batteries amp probe Main instrument 7 1 x 2 8 x1 3 180 x 72 x 32 mm Probe 0 9 23mm diameter x 6 54 23mm length Spare pins 10 and protective rubber holster Range Specifications Measurement Range Resolution Accuracy Moisture content
5. g the unit observing that the LCD illuminates and that the low battery indicator LBT is off To access the rear battery compartment the meter s protective rubber jacket must be removed Remove the rubber pin protector from the sensor pin tips before use Note that this meter automatically turns off after 10 minutes to conserve battery life To defeat this feature press the RECORD key to access the data recording mode In the recording mode the automatic power off feature is disabled For more on the recording mode refer to the section Maximum and Minimum Record and Recall later in this manual Wood Moisture Measurements Wood moisture measurements for known wood type 1 2 Press the POWER button to turn on the meter Use the Material button to select a wood group refer to the material list in the Appendix later in this manual Select group 1 through 9 for general woods or Group 9 for chipboard Insert the sensor s test pins into the wood under test Insertion should be to at least a 0 08 2mm depth for highest accuracy If this is not possible carefully insert the test pins as far as possible without using undue force The meter display will now indicate moisture content in If the moisture content is greater then 30 the display will indicate dashes at the top of the LCD display 777777 If the moisture content is less than 9 the display will indicate dashes along the bottom of the LCD display _ _
6. hite Pine Radiata pitch Muhuhi 8 Pterygota African 1 Muninga 6 Pyinkado 4 Musine Queensland 3 S Musizi 8 Queensland Kauri 8 Myrtle Tasmanian 1 Ramin e6 Europe Californian Europe Obeche 6 Silky Oak African 3 Australian Okwen 2 Spruce Norway 3 por e Olivillo 6 Sterculia Brown 1 Messmate Persimmon Teak Pillarwood Fria ela Pitch Leaf Queensland Pine Huon 2 Wando 8 Pine Scots 1 Wawa 6 ine New Zealand 2 hite Model 407777 Version 2 2 Jan 04 Calibration and Repair Services Extech offers repair and calibration services for the products we sell Extech also provides NIST certification for most products Call the Customer Service Department for information on calibration services available for this product Extech recommends that annual calibrations be performed to verify meter performance and accuracy FN Support Hotline 781 890 7440 Tech support Ext 200 Email support extech com Repair Returns Ext 210 Email repair extech com Website www extech com Copyright 2004 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 8 Model 407777 Version 2 2 Jan 04
7. hown will be the highest reading encountered since the RECORD key was pressed Press the RECALL key again to view the lowest reading MIN To exit this mode of operation press the RECORD key again The REC MAX and MIN icons will switch off 5 Model 407777 Version 2 2 Jan 04 Battery Replacement When the low battery indicator LBT appears the 9V battery should be replaced 1 2 3 4 Remove the rubber protective holster that surrounds the meter Remove the battery compartment cover located on the lower back of the meter with a coin or a flathead screwdriver Replace the 9V battery Close the battery compartment and affix the protective holster RS 232 PC Interface The Meter includes a PC interface for use with optional Data Acquisition Software and interface cable kit Part Number 407001 Operational instructions for the interface and software are supplied with the optional interface kit Calibration Calibration Verification 1 Qarnroaon Ensure that the RECORD function is not engaged REC icon is not on the LCD Select Material Group 1 using the Material Select button Press and hold both the CALIBRATION and the buttons The display will begin to count down from 5 to 1 If the meter s existing calibration is correct the LCD will display good If the meter s existing calibration is incorrect the LCD will display Err If the calibration is incorrect follow the steps in the next sect
8. ion to recalibrate Calibration Procedure 1 2 3 Remove the Meter s protective rubber holster Select Material Group 1 via the Material Select button Remove the rear battery compartment cover and locate the VR1 potentiometer that sits inside the battery compartment on the left side Press and hold the Calibration button Adjust VR1 for a display of 18 0 6 Model 407777 Version 2 2 Jan 04 Appendix Table of Material Groups alphabetized with Group Numbers Fir Douglas Afrormosia Fir Grand Fir Noble Agoa 8 Gegu Nohor Amboyna 6 Greenheart Ash European Guarea Black Ash Japanese Guarea White Gum American Red Ayan 3 Gum Saligna Baguacu Brazilian Gum Southern pee Gurjun Basswood 6 Hemlock Western Hickory Hyedunani Iroko B n A Birch Yellow Jarrah Jelutong Kapur Kari Bosquiea 1 Kauri New Zealand Boxwood Maracaibo Kauri Queensland Keruing Camphorwood E 3 Kuroka African Larch European Cedar West Indian 8 Larch Japanese Cedar Western Red Larch Western Cherry European Chestnut Chipboard Indian Coachwood 6 Mahogany African Cordia American light Makore C i Lime Loliondo Mahogany West ypress E African Mansonia Danta Maple Pacific Douglas Fir Maple rock Elm English Maple Queensland Elm Rock Maple Sugar Elm White Matai Meranti Red light or 2 Pine Ponderosa 3 dark Meranti w
9. l 9 to 30 i 0 1 4 5d Temperature compensation 32 F to 122 F 0 C to 50 C 2 Model 407777 Version 2 2 Jan 04 Meter Description 1 2 3 Sensor input Use caution when inserting the sensor PC interface jack For use with Model 407001 software and interface cable kit LCD Display Displays moisture content temperature compensation units of measure and function symbols Push buttons see below Power Turn meter on and off Hold Freeze displayed reading Material Select material group 1 through 9 see Table in the Appendix Record Track the highest MAX and lowest MIN readings Recall Review the MAX and MIN readings Calibration and Used to calibrate the meter refer to the calibration section Temperature Adjust Used for temperature compensation function refer to temperature compensation section in this manual Battery compartment back Remove the rubber protective holster to access the rear battery compartment Protective holster Rubber jacket insulates meter Sensor pins Replaceable sensor tips Sensor handle Hold the sensor by the handle when taking measurements LBTPKD HT1 T2 a HOLD MATERIAL RECORD RECALL CALIBRATION SASS TEMPERATURE ADJUST Moisture Meter 4077 77 3 Model 407777 Version 2 2 Jan 04 Preparation Insert the sensor into the sensor input jack on the meter top Ensure that a fresh 9V battery is installed by powerin
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