Meaning of the LED
Green LED on continually: suffi cient CO
2
in the
area.
Red LED on continually: CO
2
source is switched
on.
Red LED blinking: no sensor, the sensor is
damaged, or the calibration routine is running.
NO
SENSOR
Operating and adjusting the T-Micro:
All settings are done with the Push & Turn Button
(PTB). By pushing the button you will enter the
set-up menu. An arrow will appear on the left side
of the display =>.
When switching on the T-Micro the display will
read:
TechGrow
T-micro
V1.x
Operating the T-Micro:
When the CO
2
value in a room drops below the
set value (setpoint-hysteresis), the CO
2
source will
be activated. After a while, the CO
2
value will rise
and when it has reached the CO
2
set value, the
CO
2
source will be deactivated again.
Example:
The CO2 set is set at 670 ppm.
The CO2 +/- is set at 40 ppm.
The current CO2 value in the room is for example
733 ppm, which is higher than the CO2 set, so
the CO2-source is switched off . The red light is
now off . The CO2 value now slowly drops to 670:
nothing happens.
Only if the value drops below CO2 set minus CO2
+/-, which in this case is at 670 – 40 = 630 , the
source will switch on and the red light will turn
on as well. The CO2 value now rises and when
the value of 670 is reached, the source will be
switched off again.
By adjusting the CO2 +/- a stable atmosphere can
be obtained.
Default factory settings are CO2 set at 700,
CO2 +/- at 50.
Adjusting setpoint
For setting the appropriate CO
2
value, use the
PTB button to set the desired CO
2
level:
Set: 975
Use the left PTB to adjust the setpoint (300-2000
ppm).
Wait for 3 seconds, the new set value will be
saved automatically. The display will now return to
the main screen.
Adjusting hysteresis (BANDWITH)
For adjusting the hysteresis, use the PTB on the
right.
Hys: 50
Adjust de value with the PTB (20-200ppm).
Wait for 3 seconds, the new set value will be
saved automatically. The display will now return to
the main screen.
Preparation for calibration:
Place the sensor of the T-Micro 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.
To calibrate the sensor, you have to switch DIP
switch 1 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 your equipment.
1. Open the sensor case (foto A).
2. Locate DIP switch 1 (foto B).
3. Switch DIP switch 1 to position 1 (ON) using a
pen or a small screwdriver (foto C).
4. The sensor can now be calibrated.