MO257 V1.0 04/10
4
Auto Power Off
To conserve battery energy, the meter will enter a sleep mode after approx. 30 minutes of
inactivity. Press the power button to wake the meter.
Backlit LCD
Press the up/backlight button to switch the backlighting ON or OFF.
Specifications
Function Range
Accuracy
Moisture Range
0.0 to 100.0
Relative only
Measurement Depth
0.79 to 1.57” (20 to 40mm)
Display type
Backlit LCD
Display digits
Three (3) numeric displays; each displaying from 0.0 to 100.0
Display icons
HOLD, DRY, RISK, WET, MIN, MAX and low battery icon
Operating Temperature
40 to 110°F (4 to 43°C)
Operating Humidity
90%, 32-86°F (0-30°C), 75%, 86-104°F (30-40°C),
45%, 104-122°F (40-50°C)
Power Supply
Three (3) 1.5V ‘AAA’ batteries
Auto Power Off (APO)
After 30 minutes of inactivity
Dimensions
9.2 x 2.5 x 1.1” (235 x 63 x 28mm)
Weight 7.7oz
(218g)
Moisture Comparison Table (typical)
Material Display
units
Moisture
status
Gypsum <
30 DRY
30 - 60
RISK
> 60
WET
Cement <
25 DRY
25 - 50
RISK
> 50
WET
Wood <
50 DRY
50 - 80
RISK
> 80
WET
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