MO290 V3.1 03/10
7
Auto Power Off
The meter will enter a sleep mode after 30 minutes of inactivity. The meter will emit a warning
beep 15 seconds before shutting down.
To disable the APO feature, press the MODE button when turning the meter ON. The “APO”
icon will not appear, indicating it is disabled.
Specifications
Function Range Accuracy
Pinless Moisture 0 to 99.9 Relative only
Ext. Pin Moisture 0 to 99.9 Relative only
Pinless Depth Up to 0.75” (19mm)
RH Measurement 0 to 10% ± 3%RH
11 to 90% ± 2.5%RH
91 to 100% ± 3%RH
Air Temperature -20 to 170°F (-29 to 77°C)
± 3.6°F (2.0°C)
IR Temp
-4 to 31°F ± 9°F
32°F
± 2°F
33 to 392°F Greater of ±3.5% or ±9°F
-20 to-1°C ± 4.5°C
0°C ± 1°C
1 to 200°C
Greater of ±3.5% or ± 4.5°C
Display 3-digit primary display, 4-digit secondary display
Vapor Pressure 0 to 20.0kPA
Dew Point -22 to 199°F (-30 to 100°C)
Mixing Ratio 0-999GPP (0 to 160g/kg)
Sample Rate 2 per second
Backlight White LED
Operating Temperature 40 to 110°F (4 to 43°C)
Storage Temperature -14 to 140°F (-30 to 60°C)
Operating Humidity 90%, 32-86°F (0-30°C), 75%, 86-104°F (30-40°C),
45%, 104-122°F (40-50°C)
Storage Humidity 90%
Power Supply 9V battery
Battery Life 6-8 weeks (4 hrs/day use), using alkaline batteries
Auto Power Off (APO) After 30 minutes (nominal) inactivity. The APO function can be
disabled by the user.
APO Quiescent Current 50µA maximum
Dimensions 6.5x2.8x1.5’ (165x70x38mm)
Weight 7.4oz (210g)
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