Kett MT-900 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-900

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
6-8. Printer Output............................................................. 18
6-9. Data Storage .............................................................. 19
6-10.Date and Time Display............................................... 20
7. Error Display....................................................................... 23
8. Wood Group Number Table ............................................... 25
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.
• Widemeasurementrange
By using calibrations for hardwood and softwood, measurement from low to high moisture can be
done.
• 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 off 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, TURKU H, MT-8S, MT-8SK (production of the preceding 4 products discontinued), and MT-700” wood moisture testers.
Refer to p. 25 “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 3130)
16woodgroupclassications*2
Measurement Range*3: 6 to 80% (hardwood), 7 to 80% (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
79%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)
Options : Printer VZ-390, Printer cable VZC70