Thanks to S.Selvam for sending news about an incident where the gas detector used for confined space tests was out of calibration.Read about the incident in this link.
Another article by Concept Controls mentions the following:
'There has never been a consensus among manufacturers regarding how frequently confined space gas detectors need to be calibrated. However, manufacturers do agree that the safest and most conservative approach is to verify the
performance of the instrument by exposing it to known concentration test gas before each day’s use. This functional “bump test” is very simple and takes only a few seconds to accomplish. It is not necessary to make a calibration adjustment unless the readings are found to be inaccurate. The regulatory standards that govern confined space entry
procedures are in agreement with this approach'.
Read the article in this link.
Contribute to the surviving victims of Bhopal by buying my book "Practical Process Safety Management"
Another article by Concept Controls mentions the following:
'There has never been a consensus among manufacturers regarding how frequently confined space gas detectors need to be calibrated. However, manufacturers do agree that the safest and most conservative approach is to verify the
performance of the instrument by exposing it to known concentration test gas before each day’s use. This functional “bump test” is very simple and takes only a few seconds to accomplish. It is not necessary to make a calibration adjustment unless the readings are found to be inaccurate. The regulatory standards that govern confined space entry
procedures are in agreement with this approach'.
Read the article in this link.
Contribute to the surviving victims of Bhopal by buying my book "Practical Process Safety Management"
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