Sensor Check; Calibration Process; Calibration With Calibration Gas; Problem Shooting - TechGrow S-2 Sensor Manual

therefore advise you to check the S-2 every 6 months for
any deviation.
ATTENTION: calibrate the sensor only if you suspect
a deviation!

4.1 Sensor check

If you suspect a deviation of the sensor, first go through
the following steps:
1. Place the sensor in a CO
indoors or 2 hours outside).
2. Connect the sensor to a TechGrow CO
with Min/Max display.
3. Reset the Min/Max value of the CO
4. Leave the sensor and controller preferably 24 hours,
though at least 8 hours.
5. Check the minimum measured value of the
controller.
6. If the minimum value is below 380 ppm or above
440 ppm, your CO sensor needs to be calibrated.
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7. Repeat this sensor check after calibration.

4.2 Calibration process

To calibrate the sensor, switch DIP switch 1 to
position "ON". Go through the following steps:
1. Open the housing of the sensor with a thin and
sturdy object, for example a precision screwdriver.
Carefully insert it straight through one of the
rectangular holes on the back of the sensor. Push
the side of the housing out slightly, and carefully
pull the front out. Repeat if necessary with the other
holes.
2. Locate DIP switch 1.
____________________________________________________________________________________________________________________________
TechGrow | Innovative Growing Solutions
-neutral room (8 hours
2
controller
2
controller.
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3. Switch DIP switch 1 to position "ON" to enable
calibration of the CO
4. Perform the calibration according to the instructions
in your controller manual.
5. After calibration, switch DIP switch 1 back to
position "1".
6. Close the sensor housing.
7. Repeat the sensor check as described in section 4.1.

5. Calibration with calibration gas

The S-2 can also be calibrated by TechGrow using 400
ppm calibration gas. Please contact TechGrow for this
calibration method (for contact details, see
www.techgrow.nl).
6. Troubleshooting
Problem
Sensor indicates 2.016
ppm non-stop
Sensor indicates too high
values
Controller displays 'No
Sensor'
If you cannot solve the problem, please contact
TechGrow (for contact details, see www.techgrow.nl).).

7. Warranty

TechGrow provides a 6-months warranty on the S-2
Sensor. Damage caused by incorrect cables or caused by
water is not covered by warranty.
sensor.
2
Cause
Short circuit due to
moisture at the PCB or
connector
Check you sensor. It's
probably time to
calibrate
The S-2 is not
•
connected
Wrong calibration
•
Sensor defective
•
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