Kett MT-730 User manual

Operating Manual
Thank you for purchasing this product.
Please read the operating manual carefully and use this product properly.
Wood Moisture Tester
MT-730

Safety Precautions
If the safety precautions for the wood moisture tester are not observed, injuries or damage to property may
result. While the safety of the product has been given considerable attention, please read the precautions in
the operating manual and use the instrument properly.
• Please observe the safety precautions.
Please read the precautions noted in the operating manual.
• Do not use if broken.
If the tester breaks or malfunctions, please consult our repair service.
• Meaning of warning symbols.
In order to prevent damage resulting from erroneously operating the equipment, the following symbols are
indicated in the operating manual and on the product. The following are their meanings.
Note Items which the user should be aware of in order to use the unit safely.

1. Features.............................................................................. 4
2.Specications..................................................................... 5
3. Part Names ........................................................................ 6
4. Display................................................................................ 7
5. Description of Keypad........................................................ 8
6. Directions ........................................................................... 9
6-1. Before Measurement ................................................. 9
6-2. Measurement Method................................................ 10
6-3. Setting the Measurement Mode ................................ 13
6-4. Displaying the Average Value..................................... 14
6-5. How to make Bias Adjustment................................... 15
6-6. Setting the Alarm ....................................................... 16
6-7. Spare needle, Conductive rubber Replacement ....... 17
7. Error Display....................................................................... 18
8. Wood Group Number Table ............................................... 20
CONTENTS

4
• Built-incalibrationsforhardwoodandsoftwood
In addition to the calibrations for the 16 wood groups up to now, calibrations corresponding
to the overall hardwood and softwood can be selected with the single push of a button.
• Automatictemperaturecompensation
Compensation for the temperature of the wood is automatically performed by means of a
built-in temperature sensor.
• Autopowero
 Wheninactive,theunitwillautomaticallyturnitselfoafterapproximately5minutestoavoid
draining the battery.
• Alarmsetting
Set any moisture value, and an alarm will sound if the measured moisture value is higher than
the set moisture value.
• Biasadjustment
The moisture value can be corrected corresponding to each calibration curve in the range from
–9.9% to +9.9%.
1. Features

5
*1Calibrationswerepreparedusingthemostrecentwoodandmeasurementtechniques.Dierentvaluesaredisplayedforthecalibrationsofthe16woodgroupclassications.
*2Uses the same calibrations as our “TURKU, MT-8S, MT-700 (production of the preceding 3 products discontinued) ” wood moisture testers. Refer to p. 20 “8. Wood
Group Number Table”.
*3Range when measured at 20°C. For temperatures below 20°C, the measurable lower limit value increases by 0.1% per 1°C.
2. Specications
Measurement Principle :Electrical resistance
Applications :Veneer/wood
Calibrations :For hardwood and softwood use*1(Reference method: ISO 13061-1)
16woodgroupclassications*2
Measurement Range*3: 6 to 40% (hardwood), 7 to 40% (softwood)
4 to 40% (when wood groups 1-16 are selected, varies with group type*2)
Measurement Precision : Below 20%: ±0.5%,
20% and higher: ±2.0% (precision with respect to base resistance)
Display :Digital (LCD)
Resolution :0.1%
Operating Temperature Range :0to40˚C
Functions : Automatic temperature compensation, average value display, Upper limit alarm setting (10 to
39%andO),Autopowero(automaticallyturnsoafterapproximately5minutes),Mois-
ture value bias adjustment (–9.9 to +9.9%)
Power Supply, Power Consumption :1.5Vbatteries(AAalkaline)(6),approximately0.45W
Dimensions and Weight :110mm(W)x210mm(D)x50mm(H),0.5kg
Accessories
:
Needle probe, spare needle (10), conductive rubber (2), wrench, shoulder strap, 1.5 V battery
(AA alkaline) (6), carrying case, operating manual, wood group number table (Japanese and
English) (1 each)

6
<Main body>
Carrying case
Shoulder strap
Wood group
number table
1.5 V battery (AA) (6)
Operating manual
Needle probe Conductive rubber (2)Spare needle (10)
Wrench
Connector
Display
Control Panel
Needle
Cap
Battery cover (back)
Needle probe
3. Part Names
<Accessories>

7
Description of display
4. Display
Item No. Name of display area Description
1Wood group number Displays set wood group number.
2Battery indicator Comes on when battery is depleted.
3Measuring times Displays the number of times measured.
4“HRD” or “SFT” Displays the wood group selected.
5Alarm set-point value Displays the set-point value for the alarm for the upper moisture limit that
was set.
6Moisture value Displays the measured moisture value (%).
7Bar graph Displays the measured moisture value by means of a bar graph.
Displays up to 40% in 2% increments.
1
2
3
4
5
6
7

8
<Control panel>
5. Description of Keypad
Key Function
PowerOnandO
Bias correction
Selection of wood group number
Average value and number input
Setting of upper and lower alarm limit
Making measurement
Continuous measurement
For inputting numerical values (This unit has no print function.)
Selection of hard wood
Selection of soft wood
Entering a minus input
For inputting numerical values

9
6-1. Before Measurement
1.Theunitispoweredbysix1.5Vbatteries(AA,alkaline).Remove
the rear battery cover, place the batteries into the compartment
taking care to correctly orient the positive ( ) and negative ( )
terminals. Then attach the battery cover.
• isdisplayedwhenthebatteriesaredepleted.Replaceallsixwith
new batteries.
2. Plug the needle probe connector into the socket on the main
unit, and fasten and secure the lock ring.
3. Remove the cap on the needle probe.
4. Prepare the wood sample to be measured. Allow the sample to
equilibrate to the same temperature as the main unit.
• Errorsmay occur when thereis a largedierence in thetemperature
of the wood and the temperature of the unit. To make more accurate
measurements, allow the temperature of the wood to equilibrate with
the temperature of the unit.
2Tighten the lock ring
1Securely plug the
connector in
6. Directions

10
6-2.Measurement Method
1. Press the key to turn on the power. All elements of the
LCDwillbedisplayedforapproximatelythreeseconds.
Subsequently, the “Wood group or wood group number”,
“TIMES”, and “%” will be displayed.
• The display will indicate “HRD” for HARD (hardwood) or “SFT” for
SOFT (softwood).
• Ifthedisplayshowssomethingotherthanthatdescribedabove,there
may be a problem with the unit. Refer to p. 18 “7. Error Display”.
2. Select the wood group object to be measured.
A. When selecting hardwood / softwood:
Press the key to select hardwood.
Press the key to select softwood.