Answer
Sep 11, 2023 - 03:05 PM
We recommend you bump test your Altair 4 daily and then calibrate every 30 days or when you have an issue with the gas detector. ISEA has a really comprehensive guide.
ISEA Portable Gas Detector Calibration/Bump Test Frequency:
https://www.osha.gov/publications/shi...
ISEA Portable Gas Detector Calibration/Bump Test Frequency:
https://www.osha.gov/publications/shi...
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