Tên dự án : Công suất : Hợp đồng số : Vận hành : THIẾT BỊ ĐO m3/hr hr/d Yes Đồng hồ lưu lượng FM1, FM2 No Công tác lắp dựng cài đặt theo vẽ, TCKT Kiểm tra cách điện cáp điều khiển (bảng đính kèm…….) Kiểm tra khả vận hành van hệ thống đường ống đảm bảo Đồng hồ đo lưu lượng nước thô Đồng hồ đo lưu lượng nước Tuyến đường ống đặt thiết bị đo sạch, vật chắn, Thử rò rỉ Đồng hồ đo lưu lượng nước thô Đồng hồ đo lưu lượng nước Kiểm tra hiệu chỉnh o vòng lặp phận ban đầu With balancing valves on DP transmitter open, energise supply to instruments and measure loop current after 10 minutes Expected Actual Raw water 4,00 mA mA Inlet flow ( Treated water flow) 4,00 mA mA Backwash flow 4,00 mA mA Air scour flow 4,00 mA mA If a value differs from that expected by more than ±0,01 mA, reconfirm sensor range with D.P range stamped on Dall Tube/Orifice Plate, then refer to manufacturers operating instructions for procedure to set zero and coarse span N.B The fine span is pre-set at the factory and should not be adjusted unless there is reason to suspect an unexpected change in calibration A precision pressure source is Appendix (A) Page |29 required before adjusting the fine span potentiometer Check integrator accuracy: With the current loop set at 20mA, measure the time taken for the flow integrator (totaliser) to register an increase of exactly 10 m3 Convert this measure to an accuracy ( % of full scale) (See attached sheet for readings and calculation ) % Backwash flow Treated water flow Permitted error : ±2% Level Measurement Yes No Installation/assembly complete and in accordance with drawings Control cables insulation check ( see attached sheets ) Check zero calibration of primary loop element: With tank empty, or with transducer lifted clear of the water, energise supply to instruments and measure loop current after 10 minutes Expected Actual Backwash tank 4,00 mA mA Contact/balance tank 4,00 mA mA If a measured value differs from that expected by more than ± 0,01 mA, refer to the manufacturers’ operating instructions for the procedure to adjust the zero N.B Integral transducer/transmitters such as model no SH3102 have no provision for zero adjustment, they are supplied pre-calibrated Check span of primary loop element: With tank full, and with transducer lowered to the bottom of the tank such that the depth of water above the transducer is as specified on the Instrument Data Sheet ( ), measure the loop current Expected Actual Backwash tank 20,00 mA mA Contact/balance tank 20,00 mA mA If a measured value differs from that expected by more than ± 0,02 mA, refer to the Appendix (A) Page |30 PRE-COMMISSIONING CHECKLIST FOR WATER TREATMENT PLANT manufacturers operating instruction for the procedure to adjust the span ( range ) N.B Integral transducer/transmitters such as model no SH3102 have no provision for span adjustment, they are supplied pre-calibrated Above checks satisfactorily completed Name Signature Designation Date Checked Sub- Supervised by Witnessed by JBALB Contractor Consultant Representatives ... Integral transducer/transmitters such as model no SH3102 have no provision for zero adjustment, they are supplied pre-calibrated Check span of primary loop element: With tank full, and with transducer... (A) Page |30 PRE-COMMISSIONING CHECKLIST FOR WATER TREATMENT PLANT manufacturers operating instruction for the procedure to adjust the span ( range ) N.B Integral transducer/transmitters such... adjustment, they are supplied pre-calibrated Above checks satisfactorily completed Name Signature Designation Date Checked Sub- Supervised by Witnessed by JBALB Contractor Consultant Representatives