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Portable Detectors

  Why isn't my Gas-Pro charging?

The Gas-Pro is most likely charging, if the Gas-Pro has gone into deep discharge the display will not show the instrument charging symbol until it has been charging for 10+ minutes and the button has been pressed after this time. You will then see the charging symbol and the red LED flash.

  How do I functionally check my Portable Gas detector?

Crowcon offer a number of functional test options form simple spray gases to automated systems see I-Test Bump testing for further details

Fixed Detectors

  If I have a flameproof fixed detector (Ex) can I make it "intrinsically safe" (IS) by using a zener barrier or galvanic isolator?

No, a flameproof detector "safety protection" cannot be changed by using a zener barrier or galvanic isolator of any sort. It can only be used as a flameproof device.

  If I have a "intrinsically safe" (IS) fixed detector do I need a zener barrier or galvanic isolator when used in a hazardous zoned area 0, 1 or 2 for example?

Yes you must use a zener barrier or a galvanic isolator to comply with the detectors certification requirements.A zener barrier or Galvanic isolator must be used when a "intrinsically safe" (IS) detector is used in a hazardous zoned area.