USER MANUAL
ETHSA / ETHSU
ENOCEAN TEMPERATURE AND HUMIDITY SENSOR
© 2022 EnOcean | www.enocean.com
F-710-017, V1.0
ETHSx User Manual | April 2022 | Page 18/27
4
Application Information
4.1
General Installation Instructions
The small sensor housing can easily be mounted to walls or furniture using the included
double-sided adhesive pad. Using the included metal stand the sensor can be positioned on
horizontal surfaces. One end cap can be replaced by the enclosed triangle cap. To mount the
sensor to walls with uneven ground, for example rough plaster, the sensor can be fixed by
the enclosed mounting plate that was previously fastened to the wall by screws.
To achieve the desired measurement result, avoid direct sunlight on the de-
vice and do not place the device close to HVAC units or similar.
Further important installation notes please find in the Installation Instructions pro-
vided together with the unit.
4.2
Lighting Conditions
4.2.1
Minimum Illumination
◼
1200 lxh per day
is the
minimum illuminance over time of the solar panel that has
to ensured in order to recharge the device for night operation
◼
lxh (lux hours) is the multiplication value between illuminance (lux) and time (hours).
This value can roughly be taken as a constant at illuminances greater than 100 lx:
e.g. 200 lx illumination for 6 hours equals 400 lx for 3 hours
◼
The value applies to daylight, artificial light and mixed light. Define the minimum
brightness and duration in worst case (averaged over the day). Check the long-term
lighting conditions at the intended location of the device under the most unfavorable
conditions (e.g. winter time)
4.2.2
Local Lighting Conditions
◼
Brightness values are highly dependent on the site. Typical values for room type and
placement within a room can be found in the following table and figure.
The given
numbers are reference values only.
Please use an illuminometer (lux meter) to
verify a particular case. S
uited lux meters are available from € 25 upwards from in-
ternet shops.
◼
If possible the unit should be mounted with the solar cell facing the window, but
avoiding direct sunlight. With regard to the future use of the room, the installation
site should be chosen so that it cannot be shaded by the user (eg filling cabinets).
◼
Determine the best compromise position between the best illuminance and the loca-
tion requirements of the sensor. A place that is not sufficiently illuminated during the
day should be avoided or, if not possible, a CR 1225 battery can be retrofitted.
