PPM (Part-Per-Million) CO2 CONTROL MODE
As mentioned previously, the CGC-1e can control CO2 levels within the growing area with “Part-Per-Million” accuracy when used in conjunction with the PPM-1c controller. Simply removing the jumper plug and connecting the PPM-1c into the standard quick-disconnect on the bottom of the CGC-1e instantly gives you the ability to fully control all atmospheric conditions which affect timed CO2 systems.
*Note: The CO2 Frequency timer acts as a CO2 sample timer when using the PPM-1c controller. Because it may take a couple of minutes from the time CO2 is released for the PPM-1c to detect a higher CO2 level, this timer will provide a delay for the PPM controller to sense this increase in the CO2 level before releasing more CO2. If you find the CO2 level is “overshooting” the CO2 set-point, try increasing the CO2 sample timer or decrease the CO2 Inject timer. This will give the PPM-1c more time to sense the rise in CO2 resulting in reduced “overshoot”.
THE PPM-1c
The PPM-1c controller consists of an infrared detector capable of measuring atmospheric CO2 levels from 0 to 5000 PPM. The PPM-1c is powered by an 18 vdc to 24vac power supply. When it is connected, it will enter a “warm-up” mode. Once the PPM-1c has completed the “warm-up”, it will begin to self calibrate. This may take an additional minute. During this time, the digital readout may be fluctuating, this is normal. When the digital readout stabilizes, a level between 350 to 650 should be displayed. Be careful however, simply breathing on the PPM-1c controller will greatly increase the CO2 level in the air resulting in a higher reading.
IMPORTANT!!! Do not start a CO2 cycle until the PPM-1c has completed the “warm-up” and the display has stabilized.
Once the PPM-1c has been connected, it remains powered as long as it is plugged in. The controller will continuously display the exact CO2 PPM level in part per million.
The PPM-1c is a portable device and comes with a 5-foot cable so that spot checks can be made.
A simple procedure allows the user to check and reset calibration… otherwise; the PPM-1c requires no adjustment or service.
Warning: Be careful not to expose the PPM-1cto water, as it is not water-resistant!
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