Cleaning And Maintenance; Technical Specifications - Velleman DEM401 Mode D'emploi

7. Operation
1. Press the on-off button for 1 second to switch on the meter.
2. Briefly press the AVG/backlight button to switch on the backlight.
3. Hold the impeller into the air or gas flow to be measured. The display
shows the measured value.
4. Press the unit button to select your wind speed unit.
5. Press the °C/°F button to select the temperature measurement unit.
6. Press the MIN/MAX button to freeze the reading on the display. Briefly
press again to unfreeze.
7. Hold the MIN/MAX button pressed to display the recorded maximum
value, press again to display the recorded minimum value. Hold
pressed to exit the function.
8. Hold the AVG/backlight button pressed for 3 seconds to enter the
average measurement mode. The average reading of the last 10
recorded values will be displayed. Hold the AVG/backlight button
pressed for 3 seconds to exit the mode.
9. Hold the unit button pressed while switching on the meter to enter the
area setting mode. Release the unit button as soon as the desired
measuring unit appears on the LCD display. Use all the buttons (except
for the on-off button) to set your area. Switch off the meter to save
your setting.
10. Press the on-off button for 3 seconds to switch off the meter.

8. Cleaning and Maintenance

 Wipe the device regularly with a moist, lint-free cloth. Do not use
alcohol or solvents. DO NOT submerge the device in any liquid.
 Store the meter in a dry place away from humidity and vibrations.
 Remove the battery when the meter is to be stored for long periods of
time.

9. Technical Specifications

LCD display
parameters
measuring range
resolution
V. 01 – 07/05/2015
DEM401
4 digits
m/s, km/h, ft/min, knots, mph, °C, °F
-30° C ~ 60° C (-22° F ~ 140° F)
0.3 ~ 45 m/s
0.5 ~ 87.5 knots
0.6 ~ 100.6 mph
59 ~ 8858 ft/min
1.0~162 km/h
0.1 m/s (0.1 fpm)
0.1° C (0.1° F)
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