Preparation For Calibration; Calibration - TechGrow T-2 Pro Handbuch

19.2 Preparation for calibration

1. Place the sensor at least half an hour in a CO
neutral environment (+/- 400 ppm) such as a
backyard or balcony, or at least 8 hours in a
ventilated room where no persons, plants or pets
are present during this period. Do this preferably
during the day, when the CO
to the 400 ppm. In the evenings, trees and plants
release CO , increasing the CO
2
ppm.
If the minimum value is not much lower than 370
ppm, or not much higher than 430 ppm, it is not
necessary to recalibrate the sensor, since the CO
value of fresh air is between 380 ppm and 420 ppm.
A deviation of +/- 5% is usual with this type of
measuring equipment; keep this in mind when
setting your CO values. A higher deviation makes it
2
worthwhile to calibrate. Proceed with step 2.
2. To calibrate the sensor, switch DIP switch 1 to
position "ON". This prevents undesired calibration
by electronic/dimmable control gear, which can
cause many failures. Go through the following
steps:
a. Open the housing of the sensor.
b. Locate DIP switch 1.
c. Switch DIP switch 1 to position "ON" with a pen
or small screwdriver.
d. The sensor is ready to be calibrated.

19.3 Calibration

1. Unplug the T-2 Pro from the wall socket.
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TechGrow | Innovative Growing Solutions
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2
value comes closest
2
value to about 450
2
2
2. Reconnect after 20 seconds.
3. Type and software version of the controller are
displayed.
TechGrow
T-2
Pro-Series
Software v. 2.13
After a few seconds the boot menu is displayed.
4. Select "CO2 setup" and press the PTK.
System settings
=> CO2 setup
Box selection
>> HOME <<
5. Select "CO2 calibration" and press the PTK.
CO2 sensor 2000
Delay / dose
=> CO2 calibration
<< BACK <<
You enter the next screen.
Select << BACK << to cancel and press the PTK to
return to the main screen.
6. If you want to proceed with the calibration
procedure, select >> NEXT >> and press the PTK.
CO2 calibration
Read manual first
<< BACK <<
=> >> NEXT >>
You enter the next screen:
Set dipswitch ON
and place sensor
outside.
Continue
7. Switch DIP-switch 1, see section 19.2, step 2.
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