ABB MEASUREMENT & ANALY TICS | DATA SHEET Ultrasonic level LST400 Open channel flow transmitter

ULTRASONIC LEVEL LST400 / OPEN CHANNEL FLOW TRANSMITTER | DS/LST400-EN REV. F Reduced installation cost • Easy access terminations • Integrated echo display makes for easy troubleshooting High functionality on standard product • 4 to 20 mA output with HART 7 • 5 configurable relays / 8 A • Configurable as open channel flow meter • Preconfigured flow curves for most common channels • 21 Point linearizer for calibration of non-linear vessels • Pump control and cycling • Automatic variable gain & power for difficult applications • Integrated analytical software Wide range of applicability • Water...

ULTRASONIC LEVEL LST400 / OPEN CHANNEL FLOW TRANSMITTER | DS/LST400-EN REV. F 3 ULTRASONIC LEVEL LST400 / OPEN CHANNEL FLOW TRANSMITTER | DS/LST400-EN REV. F 3 Overview The LST400 The LST400 is an ultrasonic level transmitter capable of measuring liquid level or solid applications up to 15 m (approx. 50 ft) or flow rates in all types of open channel flow applications. The transmitter has a single 4 to 20 mA DC analog output with HART 7 and five relay outputs. A transducer is fitted to the top of a silo or tank, facing down towards the material being measured. The transmitter's microprocessor...

4 ULTRASONIC LEVEL LST400 / OPEN CHANNEL FLOW TRANSMITTER | DS/LST400-EN REV. F Pump control using relays LST400 has five relays as standard, eliminating the need for controllers in basic control applications. Pump control is easy to configure, and no special skills are required to program pump control functions. When it is important to keep the loads to the pump balanced we can use pump cycling. If the same pump always switches on first and then switches off last, it will carry a much larger load than any of the other pumps. This will mean earlier need for maintenance on this first pump. At...

ULTRASONIC LEVEL LST400 / OPEN CHANNEL FLOW TRANSMITTER | DS/LST400-EN REV. F 5 Wall-/Pipe-mount version Earth (ground) stud =' AC power block Terminal block B Power The LST400 can be powered using either AC power or 24 V DC power. When using AC power, connect power to either 220 V or 110 V, Neutral to N and Ground to PE. When using DC power, use 24 V DC PWR-IN. In both power modes, make sure to have PE connected to ground. Relays There are five relays on the LST400. The connectors are marked Relay 1, Relay 2, Relay 3, Relay 4 and Relay 5. The relay connections are marked as NO (Normally Open),...

6 ULTRASONIC LEVEL LST400 / OPEN CHANNEL FLOW TRANSMITTER | DS/LST400-EN REV. F Specification General Inputs One level transducer with integrated temperature sensor Range 0.5m to 15m (S15, C15, F15) 1.5m to 30m (S30) Accuracy 0.25% full span with temperature compensation or 3 mm (0.11 in) (whichever is greater) Repeatability 0.15 % full span Temperature compensation NTC 10 kQ thermistor Range -40 to 80 °C (-40 to 176 °F) Measurement modes Level Distance Linearized level (21-point linearizer) Open channel flow with preconfigured flow curves for most common channels Rate of change 0.03 to 65 ft...

ULTRASONIC LEVEL LST400 / OPEN CHANNEL FLOW TRANSMITTER | DS/LST400-EN REV. F For use on liquids up to 15m and bulk solids up to 8m. Suitable for potable and waste water applications For use in bulk solid level measurement up to a range of 15 m (approx. 49 ft). Foam face improves acoustic matching for better performance on solids. Corrosion resistant housing ideal for chemically aggressive environments. For use on liquids up to 30m and bulk solids up to 15m. Suitable for potable and waste water applications Glass reinforced epoxy Acoustic window material Glass reinforced epoxy Glass reinforced...

ULTRASONIC LEVEL LST400 / OPEN CHANNEL FLOW TRANSMITTER | DS/LST400-EN REV. F ll-/Pipe-mount version

ULTRASONIC LEVEL LST400 / OPEN CHANNEL FLOW TRANSMITTER | DS/LST400-EN REV. F Ordering information Basic ordering information for LST400 Some updates to the product options. The product code stays the same, only options are added. Also one new sensor is added. Here they are: LST400 Explosion protection certification General Purpose Sensor type and range Standard transducer ,15 m (approx. 49 ft) range Foam face transducer , 15 m (approx. 49 ft) range, for solids Corrosion resistant transducer, 15 m (approx. 49 ft) range Standard transducer, 30 m (approx. 98 ft) range No transducer Process connection...

ULTRASONIC LEVEL LST400 / OPEN CHANNEL FLOW TRANSMITTER | DS/LST400-EN REV. F Additional ordering information Additional ordering information for LST400 Add one or more codes after basic ordering information to select all required options Signal cable length Without signal cable 10 m (approx. 30 ft) 20 m (approx. 66 ft) 30 m (approx. 98 ft) 40 m (approx. 131 ft) 40 m (approx. 131 ft) Sensor options Aiming kit Sensor options Flange, 76 mm (3 in) ANSI / ASME connection, PVC Flange, 102 mm (4 in) ANSI / ASME connection, PVC Flange, 152 mm (6 in) ANSI / ASME connection, PVC Flange, 80 mm (3.1 in)...

ULTRASONIC LEVEL LST400 / OPEN CHANNEL FLOW TRANSMITTER▕ DS/LST400–EN REV. F

ABB Engineering (Shanghai) Ltd. No. 4528, Kangxin Highway, Pudong New District, Shanghai, 201319, P.R.China Tel: +86 21 6105 6666 ABB Limited Howard Road St. Neots Cambridgeshire PE19 8EU UK Tel: +44 (0)1480 475321 Note We reserve the right to make technical changes or modify the contents of this document without prior notice. With regard to purchase orders, the agreed particulars shall prevail. ABB does not accept any responsibility whatsoever for potential errors or possible lack of information in this document. We reserve all rights in this document and in the subject matter and illustrations contained...