About the Daniel Series 1500 Liquid Turbine Meters
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Daniel® Series 1500 Liquid Turbine Meters are the volumetric flow measurement instruments of choice for petroleum manufacturers and distributors worldwide for a variety of crude oil and refined product applications. High flow rates over an extended flow range are made possible through a unique stainless steel internal assembly which maximizes volume throughput and minimizes pressure drop. The possibility of missing or double-counted pulses is virtually eliminated by tough next-generation electronics which integrate two pickoff coils and a highly durable dual-channel preamplifier to guarantee total pulse integrity. Pairing the meter with the backlit Daniel DRT-899 Rate/Totalizer to streamline access to critical flow data improves functionality.
Specifications of the Daniel® Series 1500 Liquid Turbine Meters
|Line Size||DN25 to DN600 (1-in to 24-in)|
1-in to 2.5-in: ±0.25%; 3-in to 24-in: ±0.15%
*Note: Please note that repeatability of Turbine Meters can only be demonstrated under specific calibration conditions which involve the uncertainty of the laboratory. For specific details, please contact your Emerson local representative.
|Process Temperature Range (standard)||• Carbon Steel: -29°C to +60°C (-20°F to +140°F)|
• Stainless Steel: -40°C to +60°C (-40°F to +140°F)
|Operating Pressure Range||Carbon steel and stainless steel|
|Electronics||2 pickoff coils and Dual-Channel Preamplifier (standard); additional Preamplifier models available to meet application requirements|
Features of the Daniel® Series 1500 Liquid Turbine Meters
- Unique stainless steel internal assembly assures higher flow rates and an extended flow range.
- Fiscal measurement accuracy is improved with a pulse output linear with flow rate and 10:1 rangeability (turndown).
- High-frequency pulse resolution maximizes accountability and enables the measurement of minute increments.
- The combination of a dual-channel preamplifier and two pickoff coils improves the electronics performance.
- Missing or double-counted pulses are eliminated because total pulse integrity is achieved with the standard second pickoff coil.
- Local access to critical flow data is streamlined with the Daniel DRT-899 Rate/Totalizer that features a backlit display.
- The new threaded lid simplifies maintenance because it allows easy access to the preamplifier and pickoff coil(s).
- Upgrading UMB-equipped meters to the new LME housing featuring potted electronics is easy and improves durability.
Turbine Meter Theory by Daniel Series
The design of Daniel liquid turbine meters is based on a simple theory. When fluid flows through the meter, the turbine blades rotate around an axis which is located along the centre line of the turbine housing. Because the angular or rotational velocity of the turbine rotor is directly proportional to the fluid velocity through the turbine, the turbine meter is an ideal device for measuring flow rate. An electrical pickoff mounted on the body of the meter picks up the meter’s output, with the pickoff’s output frequency being proportional to the flow rate. Each electrical pulse is also proportional to a small increase in flow volume, giving this turbine meter a major advantage in addition to its excellent rangeability. Because this incremental output is in digital form, it can be added up to be a total, with a maximum error of one pulse regardless of the volume measured.
The basis of any liquid measuring system comprises the turbine meter and associated digital electronics. The turbine rotor is held in alignment with the fluid flow by an expanding blade hanger assembly. The angular velocity and the output frequency of the meter are governed by the angle of the turbine blades to the stream. When there is a sharper blade angle, a higher frequency output will be provided. A blade angle between 20º and 40º to the flow is generally used. This is because lower angles cause an angular velocity that is too low and repeatability is lost. Larger angles cause excessive end thrust.
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