This procedure applies to the initial calibration, subsequent calibration and in-use inspection of formaldehyde gas detectors (hereinafter referred to as instruments) that measure formaldehyde content in the air.
JJG 1022-2007 history
2016JJG 1022-2016 Verification Regulations for Formaldehyde Gas Detector
2007JJG 1022-2007 Verification Regulation of Formaldehyde Gas Analyzer