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Instruction manual

General instructions digital

Mass Flow instrument

LIQUI-FLOW L30

Doc. no.: 9.17.044C Date: 05-02-2010

ATTENTION

Please read this instruction manual carefully before installing and operating the instrument.

Not following the guidelines could result in personal injury and/or damage to the equipment.

Содержание LIQUI-FLOW L30

Страница 1: ...ow instrument LIQUI FLOW L30 Doc no 9 17 044C Date 05 02 2010 ATTENTION Please read this instruction manual carefully before installing and operating the instrument Not following the guidelines could result in personal injury and or damage to the equipment ...

Страница 2: ...ocuments Multibus instruments have modular instruction manuals consisting of General instructions digital LIQUI FLOW L30 document nr 9 17 044 Operation instructions digital instruments document nr 9 17 023 Fieldbus interface description FLOW BUS Interface document nr 9 17 024 PROFIBUS DP Interface document nr 9 17 025 DeviceNet Interface document nr 9 17 026 RS232 Interface with FLOW BUS protocol ...

Страница 3: ...t no charge Repairs are normally warranteed for one year or the balance of the original warranty whichever is the longer See also paragraph 9 of the Conditions of Sales The warranty includes all initial and latent defects random failures and indeterminable internal causes It excludes failures and damage caused by the customer such as contamination improper electrical hook up dropping etc Re condit...

Страница 4: ...e instructions of the supplier of the fittings Choose the mounting position according to the directions given in this manual Check the system for leaks before applying fluid pressure Electrical connections must be made according to the hook up diagram in the back of this manual Short form start up Install instrument in your process Provide instrument with correct pressure s Connection analog opera...

Страница 5: ...10 System purging 11 2 11 Seals 11 2 12 Equipment storage 11 2 13 Electromagnetic compatibility 12 2 14 Electro static discharge 12 3 OPERATION 13 3 1 General 13 3 2 Power and warm up 13 3 3 Start up 14 3 4 Operating conditions 14 3 5 Instrument performance 14 3 5 1 Meters 14 3 5 2 Controllers 14 3 6 Manual operation 14 3 7 Analog operation 15 3 8 BUS digital operation 16 4 MAINTENANCE 17 4 1 Gene...

Страница 6: ...liquid flows from 2 kg h up to 20 kg h with pressures up to 400 bar depending on body rating virtually independent of pressure and temperature changes The system can be completed with a control valve and flexible readout unit to measure and control liquid flows 1 1 2 Housing Each instrument housing style incorporates several provisions to comply with EMC requirements Meter housing Controller housi...

Страница 7: ... 1 LIQUI FLOW L30 sensor Measuring Principle The LIQUI FLOW model for flowrates up to about 20kg h is basically a straight pipe On this pipe a configuration of sensors and heaters is placed The heater temperature is maintained at a certain level above the incoming liquid temperature The power needed to maintain this temperature while the fluid is flowing is measured Furthermore the output temperat...

Страница 8: ...alve This is considered to be the standard direct operated control valve In general it is a normally closed solenoid valve The plunger is lifted by the force of the magnetic field of the coil The orifice under the plunger is removable for optimising the orifice diameter Also a normally opened solenoid valve is available 1 3 2 Bellow valve This valve type is a direct driven low power solenoid opera...

Страница 9: ...ersion factor reads 1 2 m m Cf Φ Φ Cf c c p1 p2 in which cp1 heat capacity of the calibration liquid cp2 heat capacity of the new liquid For application of this formula consult Bronkhorst High Tech B V 1 5 Software for physical properties of gases and liquids Bronkhorst High Tech B V gathered the physical properties of over 600 fluids in a database called FLUIDAT Application software such as FLUID...

Страница 10: ...ments have been used with toxic or dangerous fluids the customer should pre clean the instrument Important Clearly note on top of the package the customer clearance number of Bronkhorst High Tech B V namely NL801989978B01 If applicable otherwise contact your distributor for local arrangements 2 3 Service If the equipment is not properly serviced serious personal injury and or damage to the equipme...

Страница 11: ... system take care to avoid pressure shocks in the system and increase pressure gradually especially on high pressure units incorporating a piston operated control valve Make sure in case of a controller that the used valve can withstand the system pressure 2 10 System purging If explosive gases are to be used purge the process with inert dry gas like Nitrogen Argon etc for at least 30 minutes at a...

Страница 12: ...harge This instrument contains electronic components that are susceptible to damage by static electric discharges Proper handling procedures must be taken during installation removing and connecting the electronics Fold the shield of the cable back over the cable the shield must be around the cable Wind a copper tape around the shield Solder a black wire on the tape and connect to pin 9 of connect...

Страница 13: ...an optional fieldbus can be performed at the same time A special parameter called control mode indicates to which setpoint the controller should listen analog or digital via fieldbus or RS232 The RS232 interface behaves like a FLOW BUS interface When using more interfaces at the same time reading can be done simultaneously without problems When changing a parameter value the last value send by an ...

Страница 14: ...onse depends on model and flow rate 3 5 2 Controllers The dynamic response of a controller is factory set Standard settling time is defined as the time to reach the setpoint and stay within 2 of the initial setpoint The settling time depends on the properties of the flow the system pressure and the valve type used The control mode is factory set in such a way that after a stepwise change in the fl...

Страница 15: ...Vdc B 0 10 Vdc 0 10 Vdc F 0 20 mA sourcing 0 20 mA sinking G 4 20 mA sourcing 4 20 mA sinking For meters only the output signal is available At analog operation the following parameters are available measured value setpoint controllers only valve voltage controllers only Note When operating the instrument through the analog interface it is possible to connect the instrument to any supported fieldb...

Страница 16: ...control adjustable response time for stable control setpoint measure 2 Special software like FlowDDE FlowPlot and FlowView can be used to control these settings For operation of digital instruments by means of a specific fieldbus system or RS232 see following documents available as PDF file for FLOW BUS document number 9 17 024 for PROFIBUS DP document number 9 17 025 for DeviceNet document number...

Страница 17: ... field by the user for cleaning and servicing The parts can be cleaned with a cleaning liquid or in an ultrasonic bath To disassemble the valve proceed as follows a disconnect the instrument connector not necessary with separate valve b remove the hex nut on top of the valve assembly c lift the cover coil assembly d unscrew the flange e lift valve assembly carefully from the base f unscrew set scr...

Страница 18: ...er can be determined by d 7 6 K v mm For C2 type of valves the diameter of the orifice can be calculated as shown above or looked up in the graph below Φ Φ v 2 v 2 H O customer customer H O ρ ρ in which Φv volume flow ρ density 104 103 101 10 1 101 100 104 103 102 101 P bar d 0 1 mm d 0 37 mm d 0 3 mm d 0 2 mm d 0 14 mm 102 100 10 2 O H O ml h 2 10 1 101 100 d 1 0 mm d 0 7 mm d 0 5 mm P max v If l...

Страница 19: ...e document number 9 17 023 for detailed description 6 INTERFACE DESCRIPTION For a description of the available interfaces see document numbers 9 17 024 for FLOW BUS 9 17 025 for PROFIBUS DP 9 17 026 for DeviceNet 9 17 027 for RS232 9 17 035 for Modbus special request ...

Страница 20: ...aximum output signal Sensor failure 2b return to factory Screen blocked contamined 3a clean screen sensor blocked contaminated 3b clean sensor with a gas or fluid Valve blocked contaminated 3c clean valve Valve internal damage swollen seat in plunger 3d replace plunger assembly and adjust valve or return Output signal much lower than setpoint signal or desired flow Incorrect type of gas is used an...

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