Bronkhorst IQ+FLOW (from 01-07-2013) Manual de usuario descargar pdf (Pagina 29)

Bronkhorst High-Tech B.V.

IQ+FLOW 29

9.17.045

5 Troubleshooting and service

5.1 General

For a correct analysis of the proper operation of an instrument 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 or clogged, this can be ascertained immediately by loosening

the fittings and inspecting visually.

Energizing or de-energizing of the instrument indicates whether there is an electronic failure. After energizing, fluid pressure is to

be applied in order to check behaviour. If there should be suspicion of leakage, do not disassemble the sensor for inspection but

contact your local distributor for service or repairs.

5.2 LED indication

The red LED on the instrument gives error or warning information.

Red LED

Time

Indication

Off

Continuously

No error

Continuously

Critical error message.

A serious error occurred in the instrument.

Instrument needs service before further use

www

For more information check the instruction manual for digital communication 9.17.023 at

http://www.bronkhorst.com/files/downloads/

manuals_english/917023_operation_instructions_digital_instruments.pdf

5.3 Troubleshooting summary general

Symptom

Possible cause

Action

No output signal

No power supply

Check power supply and hook-up

Check cable connection and hook-up.

Check status of LEDs (see manual 9.17.023)

Cable damaged or hooked-up incorrectly

Check and compare signals at both ends of

cable.

PC-board damaged due to long lasting

shortage and/or high-voltage peaks

Return to factory

No or too low inlet pressure

Increase inlet pressure

Open shut-off at inlet and outlet

Supply pressure too high, or differential

pressure across meter too high

Reduce supply pressure

Sensor failure

Return to factory

Maximum output signal

Sensor failure

Return to factory

Output signal much lower than

setpoint signal or desired flow

Incorrect type of fluid or too low inlet

pressure

Test instrument on conditions for which it

was designed

Oscillation / Signal noise

Pressure regulator of supply pressure is

oscillating or wrong sized

Replace pressure regulator

Small flow indication when flow

is definetly zero

Increased zero reading without flow

caused by raised zero-point

Perform an auto-zero action

No digital communication

Occupied or wrong bus address

Change address with software

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Bronkhorst IQ+FLOW (from 01-07-2013) Manual de usuario Pagina 29

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