Wisen Innovation Technical Doc. No.2021
WiSen® Vision Unit - User Manual
www.wisencn.com
Page - 10 - of 12
5.3
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Mounting Options
The node fixings must be rigid for the sensor to measure accurate data. Movement in the fixings will affect the
readings.
6. General Maintenance and Notification
1) Once a Vision Unit is installed in the field, please minimise any man-made disturbance so that data
quality can be maintained;
2)
Radio communication will be impaired if the antenna is covered by metal or very moist soil material;
3)
Due to the discharge characteristics of the recommended battery, a battery replacement should be carried out;
4)
Our product will use all the possible capacity in a battery down to a stop (minimum) voltage, which has been
specified in the Features table. When this occurs, our WiSen protocol will send you a warning then it will enter a
deep sleep mode until a new battery is installed;
5)
If the data/photo from units are shown unexpected results or are not being sent back, then please carry out
investigation using the following two stage procedure:
A.
Remote Inspection of historical data, to identify the following:
a)
Whether the heart-beat message has been sent back successfully at each time interval;
b)
Whether the battery voltage is too low, if yes, please change the battery unit;
c)
Whether the 4G signal strength has become significantly weaker than it was previously. If yes, please
check the antenna has been screwed on firmly.
B.
On-site Inspection: If all the above are good, please arrange an on-site inspection to check:
a)
Whether the Vision Unit has visible external damage;
b)
Check the box lid to see if it is firmly tightened;
c)
Whether the antenna is bent or damaged and that the node is not blocked by new construction, e.g.,
hoardings;
d)
When it is possible, check that the signal strength is normal by using a spectrum analyser;
e)
Open the lid, to see whether the battery is firmly attached to its holder;
f)
Use a multi-meter to measure the battery voltage. If it is below the stop (minimum) voltage, replace
the battery.
Notices
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