Preparation For Calibration; Calibration Menu - TechGrow PRO Serie Manual

Calibration
The T-Mini Pro comes with a unique calibration
feature that allows you to calibrate the device in
case of large deviations.
Only calibrate the sensor if you suspect a
deviation. Our experience has shown that the
SenseAir sensors we use will function for two
®
years without calibration being necessary.
The sensors are calibrated with the utmost
precision at the factory, however it is possible that
the sensor starts to show a deviation after a year
of service and has to be calibrated again.

Preparation for calibration

Place the T-Mini Pro in a CO
(+/- 400 ppm), such as a balcony or a backyard,
for at least half an hour, or in well-ventilated room
for at least 8 hours that has not been visited
during that period, including by pets or other
animals. There should also not be any plants in
the room.
Calibration is best done during daytime, because
the CO values will be closer to 400 ppm. During
2
nighttime, plants and trees emit CO
outdoor CO values will be closer to 450 ppm.
2
If the minimal value is not much lower than 370
ppm or much higher than 430 ppm, it is not
necessary to calibrate the T-Mini Pro.
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.

Calibration menu

1. Disconnect the power supply to the T-mini Pro.
2. Reconnect the power supply after 20 seconds.
3. The display will fi rst show the type and
software version of the controller.
4. After 5 seconds the question appears to
continue calibrating. Choose Yes.
Calibration menu
Continue?
neutral environment
2
and the
2
Push the PTB once. You will now enter the
calibrationmenu. If you do nothing, or choose No,
the controller returns to the main menu without
calibration.
The calibration menu will guide you through the
procedure step by step.
Note: step 4 is your last chance to terminate the
calibration and return to the main menu without
making any modifi cations.
2. "Yes/No"
Yes
No
Place the arrow in front of "Yes" and push the PTB
once.
3. "Press the button for 10 seconds"
Press the button
for 10 seconds
Keep the PTB pressed down for 10 seconds until
you see the screen of point 5.
4. "Wait 10 sec....." > .
Wait 10 Sec
>>>>>>>
Arrows (>) will appear on the second line of the
display.
5. "Calibration lasts 20 minutes".
You will now successively see:
Calibration lasts
iutes
20 min
"Is the T-Mini Pro placed outside?"
"Do not approach the T-Mini Pro".
6. "Calibrating" - **".
Calibrating
******
An asterisk will appear on the bottom line every
minute.
7. After 20 minutes, the display will read
"Calibration OK at 400 ppm".
Calibrating OK
at 400ppm
Push the PTB once to return to the main menu.