Installation S-2; Operation Of The S-2; Non-Stop Day Mode; Calibration Of The Co - TechGrow S-2 Sensor Manual

1. Installation S-2

Always consult the manual of your controller for the
correct installation and position of the sensor.
1. Switch off the controller before connecting the S-2,
to prevent malfunctions.
2. Connect the sensor to any UTP port of the
controller.
3. Do not place the S-2 in direct sunlight nor in the
direct airflow of fans. Also prevent too much
moisture (water spraying). This can effect the
measurements.
However, ensure that the light sensor (the milk-
coloured cap on top) can detect light directly to
enable automatic switching between day and night
mode.
4. Mount the sensor about 1 meter above the floor
using the supplied mounting kit.
NOTE: The S-2 comes with a UTP cable of 5 meters.
The maximum allowed length is 15 meters. Do not
use connectors or cross cables to extend the cable,
but purchase a UTP cable with the correct length.
Using the wrong cable can cause serious damage to
your equipment. This damage is not covered by the
warranty that TechGrow provides. Damage caused
by water is also not covered by warranty.

2. Operation of the S-2

The S-2 measures the CO
and detects light. The built-in light sensor enables
automatic switching between day and night mode. You
can also opt for a non-stop day mode (see section 3).
The S-2 has a calibration function that allows you to
calibrate the sensor in fresh air (400 ppm) in case of
large deviations. The calibration menu is only accessible
through a CO controller (see section 4).
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To prevent undesired calibration by electronic/dimmable
control gear, which can cause many failures, the S-2 is
equipped with a DIP switch.
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concentration in your room
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The S-2 is available in two versions:
Measurement range 0 – 2.000 ppm: suitable for T-
•
Micro and T-1. Adjustable in steps of 10 ppm.
Measurement range 0 – 10.000 ppm: only suitable
•
for T-1. Adjustable in steps of 50 ppm.
Always consult the manual of your controller for the
most suitable sensor.

3. Non-stop day mode

The light sensor enables automatic switching between
day and night mode. You can also opt for a non-stop
day mode. To manually set this non-stop day mode, go
through the following steps:
1. Open the housing of the sensor with a thin and
sturdy object, for example a precision screwdriver.
Carefully insert it straight through one of the
rectangular holes on the back of the sensor. Push
the side of the housing out slightly, and carefully
pull out the front. Repeat if necessary with the other
holes.
2. Locate DIP switch 2.
3. Switch DIP switch 2 to position "ON" for a non-stop
day mode (or back to "2" for automatic switching
between day and night mode).
4. Close the housing.

4. Calibration of the CO

(manually)
The S-2 is calibrated extremely accurate at the factory.
Therefore you can use this sensor immediately. Our
experience shows that the S-2 often performs correct
measurements for 2 years without any problems.
However, certain conditions can affect its accuracy. We
sensor
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