Turbine flowmeter protocol 33 defines: The demarcation flow qt is the flow value between the maximum flow and the minimum flow, which divides the flow range into two distinct zones, the "high zone" and the "low zone", with the maximum allowable error.
The regulations 5.1.1 of the gas turbine flow meter in the specified flow range of the accuracy level, the maximum allowable error of the corresponding provisions, the boundary flow qt also made provisions.
The procedure 5.1.2 has also made corresponding provisions for the accuracy level and the maximum allowable error of the liquid turbine flowmeter within the specified flow range, but the concept of delimiting flow qt is not given. Therefore, we can conclude that the demarcation flow qt is only applicable The conclusion of a technical indicator for gas turbine flowmeter verification.
The problem then appeared. Rule 220.127.116.11(1) specifies the flowmeter verification points: qmin, qt, 040qmax, and qmax; for accuracy levels above 0.5%, accuracy level above 0.5%, and turndown ratio greater than 20: The flow meter 1 specifies the corresponding verification point. Since qt is only applicable to a technical specification of gas turbine flowmeter verification, how can the verification point of liquid turbine flowmeter be determined? There is no explicit provision in the procedures. When the liquid turbine flowmeter is checked, the verification point cannot be accurately determined.