For the best experience on our site, be sure to turn on Javascript in your browser. Sign up for our newsletter to receive exclusive discounts, promotions, and grow tips. We'll also keep you updated on the latest product releases. Meters Controllers Timers Nutrient Dosers. Availability: Out of stock. Expected Availability Date: Unknown. Notify me when this product is in stock. Selected Add-Ons. This item is no longer available, please see Related Products below for replacement products.
Skip to the end of the images gallery. Skip to the beginning of the images gallery. Its' proven technology is very accurate at measuring levels of Carbon Dioxide in your growing area from 0 to ppm Parts-Per-Million. Now press the mode button nine times to display the current set point. Press enter to accept the change. Press clear to return the unit to RUN mode. The sensor onboard the PPM-3 is capable of remaining in calibration for a minimum of three years. Extreme shock during shipping and other factors may affect the calibration.
By bringing the unit outdoors, you. The reading outdoors should be between PPM. If the display does not read PPM, a simple calibration can be performed. Bring the unit outside so that it will receive fresh air. Do not locate the unit in direct sunlight. Plug the power supply and power cord into vac. Move away from the controller to allow the reading to stabilize for approximately 20 minutes. Check the CO2 level. As you exhale, large concentrations of CO2 are expelled from your lungs.
This higher level of CO2 will affect the calibration of the unit. If it is outside that range, the unit can be re-calibrated. To re-calibrate the unit: 1 Bring the unit outside so that it will receive fresh air. Re-connect the power supply. It should read around The green LED will flash as long as it is self-calibrating. After approximately 5 minutes the green LED will stop flashing and the display will return to the normal run mode.
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