Bump Testing and Calibrating G7 and G7 EXO with Chlorine (Cl2)

Updated June 16, 2022

This article describes Blackline Safety’s equipment and device setting recommendations for bump testing and calibrating G7 and G7 EXO chlorine (Cl2) gas sensors.

About chlorine

Chlorine (Cl2) is considered a sticky gas. Sticky gases are a group of toxic gases that tend to sorb (absorb or adsorb) with surfaces, such as sampling tubing or the exterior of gas detection devices.

This means your device response time will be slower than normal when bump testing or calibrating with Cl2 because of the tendency of the tubing material to interact with the gas flowing along it, slowing down the overall flow of gas to the detector.

Bump Testing and calibrating with chlorine

To reduce the impact of this behavior, Blackline recommends that you use the following equipment and device settings when bump testing and calibrating your device's Cl2 gas sensors.

Bump Testing and Calibrating G7 Cl2 Gas Sensors using G7 Dock

If you are bump testing and calibrating your G7 with G7 Dock, you must:

  • Use inlet 1, which has been optimized for Cl2 and other highly reactive gases based on order of gas calibration or bump testing.
  • Use Teflon lined tubing (ACC-FEP-T2).
  • Use a stainless steel regulator, or a regulator with a Viton valve seat and seals (ACC-DFR-V).

For detailed information on bump testing and calibrating with G7 Dock, refer to the G7 Dock Technical User Manual.

Manually Bump Testing and Calibrating G7 or G7 EXO Cl2 Gas Sensors

If you are manually bump testing and calibrating your G7 or G7 EXO, you must:

  • Use a 1.0L/min stainless steel fixed flow regulator (ACC-REG-1.0L-SS).
  • Use Teflon-lined tubing to connect the gas cylinder to your device (ACC-FEP-T2).

For detailed information on manually bump testing and calibrating G7, refer to the G7 Technical User Manual.


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