Calibration Menu - TechGrow T-2 PRO Manuel

Calibration
The TechGrow T-2 Pro comes with an unique
calibration feature that allows you to calibrate the
device in case of large deviation.
Only calibrate the sensor if you suspect a
deviation.
Experience has shown that the SenseAir®
sensors we use function without any problems for
at least two years without calibration being
necessary.
The sensors are calibrated with the highest
precision during manufacture, however it could
occur after a year in use that the sensor shows
a deviation and needs to be calibrated.
Preparation calibration:
1. Place the CO2 sensor in a CO2 neutral
environment (+/- 400ppm), such as a balcony
or your garden for at least half an hour, or in
a sealed and well-ventilated room for at least
8 hours. This is best done during daytime,
because the CO2 values will be closest to 400
ppm. During nighttime, plants and trees emit
CO2 and the outdoor CO2 values will be
closer to 450 ppm.
If the minimal value is not much lower than
370 ppm or much higher than 430 ppm, it is
not necessary to calibrate the sensor. That is
because the value of neutral/clean outdoor air
is between 380 ppm and 420 ppm. A deviation
of +/- 5% is common with this type of
measurement equipment. Please keep this in
mind when setting your CO2 values. In case of
a greater deviation, calibration is necessary.
Please continue with step 2.
2. To calibrate the sensor, you have to switch DIP
switch 1 (see image) from position 0 to
position 1 (ON). This is to prevent any
unintentional calibration caused by any
electronic/dimmable control gear, which can
cause much disturbance to our measurement
equipment. This manual security has been
built in for exactly that reason.
3. Open the sensor case (see image A).
4. Locate DIP switch 1 (see image B).
5. Switch DIP switch 1 to position 1 (ON) using a
pen or a small screwdriver (image C).
6. The sensor can now be calibrated.

Calibration menu:

1. Disconnect the power supply to the T-2 Pro
CO2-controller.
2. Re-connect the power after 20 seconds.
3. The display will fi rst show the type and
software version of the controller.
TechGrow
T-2
Pro-Series
Software v. 1.x
4. After 5 seconds the question appears to
continue calibrating. Choose Yes.
CO2 calibration
Continue?
Yes
=> No
5. If you do nothing, or choose No, the controller
returns to the main menu without calibration.
Foto A
Foto B
Foto C