Extech Instruments MO220 User Manual page 12

Wood Type
Taxus
Tectona
Terminalia
Thuja
Tujopsis
Tieghamella
Tilia
Tilia
Triploehiton
Tsuga
Ulmus
Ulmus
Ulmus
Xylia
Zelkova
NOTES:

The calibration data in this table are based on standard tests by oven-drying of commercial
samples of the various wood species, between 7% and fibre saturation. Above the fibre
saturation point (25%-30%) readings are approximate and generally apply to wood that has
been dried and re-wetted.

The instrument is calibrated for wood at 68°F (20°C). If the temperature of wood varies by
more than 5°C, the meter reading can be corrected approximately by adding 1/2% for every
9F (5°C) below 68°F (20°C) or subtracting 1/2% for every 9F (5°C) above 68°F (20°C).

Readings higher by 1%-2% may be obtained where wood has been impregnated with a
water-borne preservative.

High readings obtained with some ply-woods of peculiar composition must be treated with
caution.

Building material measurements: Select the 'A' scale to measure building materials. Refer to
the following conversion table to obtain the building material moisture value.
baccata
grandis
superba
plicata
dolabrat
heckelii
anericana
vulgaris
scleroxylon
heterophylia
amercana
procea
thomasii
dolabriformis
serrata
12
Grp
C
F
A
C
J
B
G
E
G
C
E
E
E
E
B
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