Cleaning And Maintenance; Technical Specifications - Velleman DEM501 Mode D'emploi

5. Press the setting button to switch the auto power-off function on or
off.
6. Hold the setting button pressed for 3 seconds to enter the dew point
measurement mode. Hold the setting button pressed again to exit the
function.
7. When powered off, keep the setting button pressed and switch on the
meter to enter the humidity calibration mode. Increase or decrease the
humidity setting with the backlight and °C/°F buttons. Press the
setting button to exit the mode.
8. Briefly press the MIN/MAX button to freeze the reading on the display.
Press again to unfreeze.
9. Hold the MIN/MAX button for 3 seconds to display the recorded
maximum value, briefly press to display the recorded minimum value,
hold pressed to exit the function.
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

display
sensor type
humidity
temperature
measurement range
humidity
temperature
dew point temperature -20° C ~ 70° C (-4° F ~ 158° F)
humidity accuracy
40 % to 60 % RH
20 % to 40 % RH
60 % to 80 % RH
0 % to 20 % RH
80 % to 100 % RH
temperature accuracy
-20° C to 70° C
(-4° F to 158° F)
V. 01 – 07/05/2015
DEM501
LCD with backlight
precision capacitance sensor
thermistor (head) and K-type thermocouple
0 % RH ~ 100 % RH
-20° C ~ 70° C (-4° F ~ 158° F)
+/- 2.0 % RH (@ 23° C +/- 5° C)
+/- 3.0 % RH (@ 23° C +/- 5° C)
+/- 3.0 % RH (@ 23° C +/- 5° C)
+/- 4.0 % RH (@ 23° C +/- 5° C)
+/- 4.0 % RH (@ 23° C +/- 5° C)
+/- 1.0° C (1.8° F)
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