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Bronkhorst®

Instruction Manual EL-FLOW® Classic series

9.17.085D

15

5

Troubleshooting and service

For a correct analysis of the proper operation of a flow meter/controller it is recommended to remove the unit from the

process line and check it without applying fluid supply pressure. In case the unit is dirty, this can be ascertained

immediately by loosening the compression type couplings on the inlet side.

Energizing and de-energizing the instrument can indicate if there is an electronic failure. After energizing, control behavior

can be checked by applying fluid pressure.

If you suspect leakage, do not check for gas bubbles with a leak detection liquid under the cover, as this may short-circuit

the sensor or the printed circuit board.

Do not disassemble the instrument for inspection, but contact your local distributor for service or repairs.

5.1

Errors

See 

LED indications

 for an explanation of the LED indications the instrument can give.

5.2

Common issues

Symptom

Possible cause

Action

No output signal

No power supply

·

Check power supply

·

Check cable connection

·

Check cable hook-up

No setpoint given or setpoint too

low

Inlet pressure or differential

pressure too low

Increase inlet pressure

Piping, filters and/or control valve

clogged or blocked

·

Flush fluidic system with clean, dry air. If

problem persists, contact Bronkhorst.

·

For external proportional control valves:

supply 0…15 Vdc and operational inlet

pressure to valve and slowly increase

voltage. If valve does not open, clean parts

and re-adjust valve

Laminar flow element clogged or

blocked

Return equipment to factory

Sensor failure

Return equipment to factory

Control behavior unstable

Measurement disturbed by

vibrations

If possible, avoid installation in close proximity

of mechanical vibration

Inlet pressure unstable

Install pressure regulator or increase buffer

volume between controlling instruments

Inlet and/or outlet pressure too

high or too low

Adjust pressure and/or set instrument pressure

in accordance with actual process pressure

Wrong process fluid supplied

Supply instrument with fluid it was configured

for

Control valve damaged

Return equipment to factory

No flow (sending a setpoint has no

effect)

No fluid supply

Check upstream components for obstruction,

e.g.:

·

fluidic lines

·

valves

·

filters

Setpoint too low

Summary of Contents for EL-FLOW Classic Series

Page 1: ...Pleaseread this Instruction Manualcarefully beforeinstalling and operating theinstrument Notfollowing theguidelines could resultin personalinjury and ordamageto theequipment EL FLOW Classic series Thermal Mass Flow Controllers Instruction Manual ...

Page 2: ...mationwill facilitatetheuseoftheinstrument and or contributetoitsoptimal performance Additional infoavailableontheinternet or from your local salesrepresentative Receipt of equipment Check the outside package box for damage incurred during shipment If the box is damaged then the local carrier must be notified at once regarding his liability if so required At the same time a report should be submit...

Page 3: ...intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury Read the operating information carefully before using the product Before operating make sure the line cord is connected to a properly grounded power receptacle Inspect the connecting cables for cracks or breaks before each use The equipment and accessor...

Page 4: ...Bronkhorst Instruction Manual EL FLOW Classic series 9 17 085D 4 ...

Page 5: ...2 6 2 9 2 7 Powering up and powering down 9 2 8 Purging before use 10 2 9 Zeroing before use 10 2 10 Calibration 11 2 11 Model key 12 Basic operation 3 12 3 1 General 12 3 2 LED indications 13 3 3 Multifunctional switch 13 Normal operating functions 3 3 1 13 Power up functions 3 3 2 14 Advanced operation 4 14 4 1 Using other gases than specified 14 4 2 Conversion factor calculation 14 4 3 Maximum ...

Page 6: ...hmediaandconditions e g pressure temperature asspecifiedat orderingtime Ifyouareplanningtousetheproduct includinganythirdpartycomponents suppliedbyBronkhorst suchaspumpsor valves withother mediaand or other conditions alwaysbesuretocheckthe wettedmaterials includingseals for compatibility Seethetechnical specificationsoftheproduct andconsult thirdparty documentation ifapplicable tochecktheincorpor...

Page 7: ...ed with a clean dry and inert gas In case of severe contamination cleaning the inside of the device may be required After cleaning recalibration of the instrument is recommended Inexpertlyservicinginstrumentscanleadtoseriouspersonal injuryand or damagetotheinstrument or thesystem it is usedin Therefore servicingmust beperformedbytrainedandqualifiedpersonnel Contact your local Bronkhorst representa...

Page 8: ...g The bottom side of the EL FLOW Classic is fitted with two threaded mounting holes for stable mechanical fixation of the instrument Refer to the dimensional drawing for the exact position of the mounting holes For optimal performance observethefollowingguidelines Preferably mount theEL FLOW Classic inanupright position especiallyiftheoperatingpressureishigher than10 bar Whenmountingtheinstrument ...

Page 9: ...ling proceduresmust befollowedduringinstallation dis connectingandremovingtheelectronics Thedevicedescribedinthismanual carriestheCE markandiscompliant with the concerning EMC requirements However compliancewiththeEMC requirementsisnot possiblewithout theuseofproper cablesandconnector gland assemblies Bronkhorst recommendstheuseoftheir standardcables Thesecableshavetheright connectorsandifloose en...

Page 10: ...ing might take longer and the nearest point to zero is accepted The procedure will take approximately 10 seconds When the indication is showing 0 signal and the green indication LED is glowing continuously again then the zeroing action was successful 2 10 Calibration EL FLOW Classicinstruments are Air or N2 calibrated Bronkhorst High Tech B V certifies that all instruments meet the rated accuracy ...

Page 11: ...Bronkhorst Instruction Manual EL FLOW Classic series 9 17 085D 11 2 11 Model key Example F 201CL 009 1K0 A Gas CO Range 1 SLM Analog output 0 5 Vdc ...

Page 12: ...ndon theserial number label 3 2 LED indications green Mode operation mode indication red Error error warning messages The tables below list the different LED indications Green Pattern Time Indication on continuous Normal operation mode off continuous Power off or program not running blink 0 2 sec on 0 2 sec off Special function mode the instrument is busy performing a special function e g auto zer...

Page 13: ...error messages and restart the instrument on off 8 12 sec Auto zero re adjust the zero point of the instrument flow meters controllers on on 12 16 sec Factory mode do not use SeeZeroingbeforeusefor backgroundinformationandinstructionsonhowtoadjust thezeropoint ofaninstrument Never perform azeroingprocedurebeforehavingtakennoticeoftheinstructions 3 3 2 Power up functions In order to access these fu...

Page 14: ...abasecalledFLUIDAT Thisdatabasealso providesacollectionofroutinestocalculatephysical propertiesofgasesandliquids not onlyat 20 C 1 atm but at any temperature pressurecombination bothfor gasesandfor liquids CheckFLUIDAT ontheNet onhttp www fluidat com Consult your distributor for moredetails Also see section Calibration 4 3 Maximum pressure drop For pilot solenoid operated control valves with small...

Page 15: ...ection Check cable hook up No setpoint given or setpoint too low Inlet pressure or differential pressure too low Increase inlet pressure Piping filters and or control valve clogged or blocked Flush fluidic system with clean dry air If problem persists contact Bronkhorst For external proportional control valves supply 0 15 Vdc and operational inlet pressure to valve and slowly increase voltage If v...

Page 16: ...sure or differential pressure too low Increase inlet pressure Use instrument in conditions it was designed for Process gas condensation Decrease inlet pressure or increase gas temperature Piping filters and or control valve clogged or blocked Sensor blocked or contaminated Flush fluidic system with clean dry air If problem persists contact Bronkhorst Supplied fluid type does not match configured f...

Page 17: ...ight product for your application Contact sales by e mail sales bronkhorst com For after sales questions our Customer Service Department is available with help and guidance To contact CSD by e mail support bronkhorst com No matter the time zone our experts within the Support Group are available to answer your request immediately or ensure appropriate further action Our experts can be reached at 31...

Page 18: ...edfrom theService Support sectionoftheBronkhorst website www bronkhorst com Important Clearly note on top of the package the customs clearance number of Bronkhorst High Tech B V NL801989978B01 only if applicable otherwise contact your local Bronkhorst representative for local arrangements 6 2 Disposal end of lifetime Within the scope of the European Union manufacturers of electrical and electronic...

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