Technical Specifications - Velleman DVM171THD Mode D'emploi

1. Open the battery compartment by using a pointed object (e.g. small
screwdriver). Move the pointed object in the direction of the arrow.
2. Gently pull the data logger from the casing.
3. Remove/insert the battery. Only use 3.6 V lithium batteries. Make sure the
polarity is as indicated in the casing. When the battery is inserted, the green
and yellow LEDs will flash alternately.
4. Slide the data logger back in the housing until it snaps into place.
Note: Make sure that you position the housing with the right side upward: the
tab [a] on the data logger should fit into the notch [b] in the housing. If you
place the housing upside down, pull firmly to remove it and place it back in the
correct position.
5. Configure the data logger using the enclosed software.
Note: Leaving the device in the USB port will reduce the battery life.
9. Sensor Reconditioning
Over time, the internal sensor may become compromised as a result of pollutants,
chemical vapours, or other environmental conditions. This can lead to inaccurate
readings. To recondition the internal sensors, proceed as follows:
1. Heat the data logger to +80 °C (+176 °F), humidity < 5 % for 36 hours.
2. Keep the data logger at +20 to +30 °C (+70 to +90 °F), humidity > 74 % for
48 hours.

10. Technical Specifications

relative humidity
relative humidity
accuracy
temperature
temperature
accuracy
dew point
V. 05 – 19/09/2017
DVM171THD
overall range
0 % – 20 %
20 % – 40 %
40 % – 60 %
60 % – 80 %
80 % – 100 %
overall range
-40 °C to -10 °C (-40 °F to +14 °F)
-10 °C to +40 °C (+14 °F to +104 °F)
+40 °C to +70 °C (+104 °F to +158 °F) ± 2 °C (± 3.6 °F)
overall range
0 – 100 % ± 5.0 %
± 5.0 %
± 3.5 %
± 3.0 %
± 3.5 %
± 5.0 %
-40 °C to 70 °C (-40 °F to 158 °F)
-40 °C to 70 °C (-40 °F to 158 °F)
6
± 2 °C (± 3.6 °F)
± 1 °C (± 1.8 °F)
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