EXT O3 Control works in conjunction with Ozone Concentration Regulation (OCR) signal in an "AND" relationship. In other words, the manual OCR dial on the front panel of the Ozone Generator should be set to MAXIMUM (#10 or 10-00) to allow the use of EXT O3 Control in the full 0-100% duty range.

Locating the EXT O3 Control:
All OzoneLab™ Ozone Generators have the EXT O3 Control port  located in a very close proximity to the ozone generator 12VDC power supply jack.

OzoneLab™  OL80F/S Ozone Generator	OzoneLab™  OL80F/DST Ozone Generator
OzoneLab™  OL80W Ozone Generator	OzoneLab™  OL100/DS Ozone Generator
OzoneLab™  OL80A/DLS Ozone Generator & Gas Analyzer	OzoneLab™ OL80M Ozone Generator & Controller

Type of External Signal Port: Ozone Generator EXP plug: 3.5mm Jack (Female) EXP Signal source: 3.5mm "STEREO" Plug (Male)
Logic "0" Voltage: 0.0-0.7VDC Function: Ozone "OFF"
Logic"1" Voltage: 5.0-13.0VDC Function: Ozone "ON"

EXT O3 Control Signal:
For Ozone Concentration Regulation, a signal base frequency must be kept in a relationship to the O₂/O₃ gas flow to prevent ozone concentration instability.

Flow [ml/min]	[Hz]
0 - 125	2+
125 - 500	8+
500 - 1000	16+
Ozone Services Standard	16

Low flow rates (slow speed of gas passing through the instrument ozone production cell) have the least demanding requirements for the Frequency of the discharge. Faster the speed of the gas, higher the minimal discharge frequency must be. Standard OzoneLab™ instruments utilize 16Hz Frequency, which covers nicely the whole flow rate range 0-1000ml/min, producing very uniform/stable ozone concentration.

Setup Example

EXT accessories are available in our Accessories Area.

Examples of External Ozone Production & Ozone Flow Control Devices

Foot Switch Control	OLW - Transmitter Module	C-30Z Ozone Monitor	Computer with OLS OzoneLab™ Software