The project in context
Technology in its operating context.
The technical proposal covered two potable-water tanks with a requested range of 0–4,700 mm and one firewater tank with a range of 0–2,100 mm. One complete spare was added to the main instruments in the final package.
Scope of work
- 3 main transmitters and 1 complete spare
- Measurement design for potable-water and firewater tanks
- Dimensional conformity with approved drawings
- Instrument and test documentation, wooden transport packaging
Execution
The final inspection in May 2022 confirmed three main instruments and one spare. All four instruments conformed dimensionally to the approved drawings, and preparation of the wooden packaging was also checked.
Design for water tanks
The project specification proposed non-contact ultrasonic measurement with installation in a stilling well in a non-hazardous area. The requested tank ranges were shorter than the proposed series’ maximum range of 6 m.
- Specified interface: 4–20 mA with HART communication.
- Specified power supply: 18–36 V DC.
- Flanged top connection and local LCD indication in the technical proposal.
Instrument and packing verification
The inspection assessed the dimensional conformity of all four units. The submitted package included material records, calibration, pressure-test and PMI reports, and high-voltage and insulation-resistance test reports.
The instruments were secured with bolted connections in a wooden crate for transport. The spare provided a reserve for the supply, rather than a fourth confirmed installed measuring point.
Outcome
A package of four ultrasonic level instruments, including an operational spare, prepared for dispatch.