Control And Set Up; Set Setpoint; Set Hysteresis; Min/Max Values - TechGrow T-Micro Handbuch

By playing with the settings of the CO
stable atmosphere can be reached.
Factory settings:
CO setpoint 700 ppm;
•
2
CO hysteresis 50 ppm.
•
2

8. Control and set up

You can set the T-Micro with just two rotary knobs.
When the T-Micro is switched on, the display shows:
TechGrow
T-micro V1.0

8.1 Set setpoint

Set the desired CO level (300 - 2000 ppm) using the
2
left rotary knob.
Set: 975
Now wait for 3 seconds: the setpoint is saved
automatically and you will return to the main screen.

8.2 Set hysteresis

Set the desired hysteresis (20 -200 ppm) using the
right rotary knob.
Hys: 50
Now wait for 3 seconds: the set hysteresis is saved
automatically and you will return to the main screen.

8.3 Min/Max values

The display shows the minimum and maximum CO
value in the room. On the bottom line, 5 values will
alternate:
1. Set
2. Hys
3. Min
4. Max
5. Day / Night
To reset the CO Min/Max values, press the small
2
button in the hole at the back of the T-Micro with a thin
object, like a paper clip. Or remove the voltage from the
controller for 5 seconds.
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TechGrow | Innovative Growing Solutions
hysteresis, a

9. Calibrating the sensor

2
The TechGrow T-Micro is equipped with a calibration
function that allows you to calibrate the external sensor
yourself in case of large deviations. Our experience has
shown that our sensors can easily function for two years
without calibration. Our sensors are calibrated at the
factory with the highest accuracy. However, in
exceptional cases it might occur that the sensor shows
a deviation and needs to be recalibrated after only one
year of use.
ATTENTION: calibrate the sensor only if you suspect
a deviation!

9.1 Sensor control

If you suspect a deviation of the sensor, first go through
the following steps:
1. Place the sensor in a CO
2. Connect the sensor to a TechGrow CO
3. Reset the Min/Max value of the CO
4. Leave the sensor and controller at least 8 hours.
5. Check the minimum measured value of the
6. If the minimum value is below 380 ppm or above
7. Perform the calibration according to the
8. Repeat this sensor check after calibration.

9.2 Preparation for calibration

1. Place the T-Micro sensor at least half an hour in a
2
2. To calibrate the sensor, change the setting of DIP
2
indoors or 2 hours outside).
with Min/Max display.
controller.
440 ppm, your CO sensor needs to be calibrated.
2
instructions in sections 9.2 and 9.3.
CO -neutral environment (+/- 400 ppm) such as a
2
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.
switch 1 of the sensor from position 0 to position 1
(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.
-neutral room (8 hours
controller
2
controller.
2
value comes closest
2
value to about 450
2
11