Answer: (1) Monitoring must be carried out under normal operating conditions of the air compressor unit and the air supply system, and the operating conditions should be representative of the statistical values.
(2) For air compressor units with stable loads, a detection cycle is 2 hours, and for air compressor units with unstable loads, one or several load change cycles are used as a detection cycle.
(3) During the detection cycle, all measured parameters under the same operating conditions should be sampled simultaneously, and the measured parameters should be sampled more than three times; the sampling interval is 10~20min; the average value of each group of readings is used as the calculated value.
(4) The volume flow rate of the air compressor is detected by the flow meter method. For air compressor units with water-cooled intercoolers, the heat balance method specified in relevant regulations can also be used for measurement.
(5) Requirements for measuring instruments. The measurement of electricity, temperature, pressure and flow should be within the specified range of use of the instrument. The accuracy of the measuring instrument (including online working instruments) should comply with regulations. The instrument should be within the validity period of the calibration.
