CEM Evaluation Sample Clauses

CEM Evaluation. In the plant control room at the time of the inspection, record the readings from the continuous emission monitor (CEM) readouts (e.g,, LED, CRT, or strip chart). When it is safe to do so, take readings from the meters on the instruments for comparison with the control room readings. The purpose of these comparisons is to evaluate the accuracy of the data acquisition system. For opacity monitors, compare your visible emissions observations with concurrent opacity CEM readings. The inspector should check strip charts to ensure that the proper calibrations are being performed. He should record the calibration gas concentrations and compare them with the required values if any exist in the regulation. Often it is useful to have facility personnel manually demonstrate the calibration.