2028 - 2 Pages

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2028

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www.nokeval.com sales@nokeval.com Yrittäjäkatu 12 37100 Nokia, Finland 2028 Mass flow display based on weighing • Input 0/4-20 mA, 0-5/10V • Mass flow display (kg/s) • 6-digit processor-based display • Output 4-20 mA as an option • 2 alarms as an option • Front panel protection IP65 • Sensor supply 24 VDC, max. 150 mA • Power supply 85..240 VAC or12..32 VDC/ 24 VAC The panelmeter 2028 is specially designed to satisfy the needs of massflow indication in difficult applications where other flowmeters are unsuitable or difficult to use, such as measurement of solid matters or molten metal. Based on the current signal of a strain gauge transmitter the panelmeter 2028 calculates the change of the weight per second and in that way shows the actual flow rate. Typical applications are reservoirs containing solid materials or liquids whose emptying or filling process is monitored and controlled on the basis of the flow rate. This measuring method enables indication of the flow rate in two directions, i.e. during the filling or the emptying. The linearity, 0.005 %, is exceptionally good because the mass to be weighed is usually large in comparison with the often small flowrate. The panelmeter may display either the flowrate or the weight of the object, the selection of which is done simply via a front panel key. A galvanically isolated output 4-20 mA and two alarm relays are available as options. Separate passwords can be set for access to the configuration menu and alarms. The panelmeter series 2000 is very flexible and easy to modify by changing input cards for different kinds of sensors, such as temperature sensors, pulse sensors, serial inputs etc. The modification does not require any calibration. The optional cards are the same for all the instruments in this product family. Each panelmeter type has its own datasheet. Separate field enclosures can be supplied for 1 to 3 panelmeters. The 2028 is also available in the field display series, model 2800-2028. Typical application Optimizing the batch control of molten metal based on the actual flow rate Strain gauge transm itter The flow rate of pouring is controlled by the alarms Alarm The panelmeter calculates massflow on the basis of the current signal from the strain gauge transmitter and shows the flow rate of pouring. This method suits well for applications where conventional flowmeters cannot be used, e.g. molten metal or s

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Process inputs: Input Display scaling Input resistance Voltage input Accuracy Linearity General: Display Input filter AD-conversion Temperature effect Terminals Power Front panel protection Weight 6 digits, bright red (or green) LED, digit height 14.5 mm, brightness selectable adjustable digital filter 16 bits (1/64 000) 0,0004 %/°C with voltage input removable, wire 2,5 mm2 85..240 VAC or 12..32 VDC/ 24 VAC IP65 with a rubber gasket 240 g Output: Output signals Output resistance Accuracy Repeatability Display scaling: The display is set to correspond to the range of the strain gauge...

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