Disturbances In Flow Measurement By Means Of An Ogm - Ecolab Elados Pump Rack Betriebsanleitung

Operational malfunctions and troubleshooting
11.3

Disturbances in flow measurement by means of an OGM

The faults affecting the OGM
corresponding operating instructions 417102208.
Fault description
OGM does not deliver pulses
Indicator LED is not working
Delivered pulse number too low
Delivered pulse number fluctuating Air bubbles in metering medium
417102267 Ver. 04-11.2023
PLUS
oval gear meters are also listed in the
Cause
Incorrect flow direction
Wired incorrectly
Polarity of PLC input not compliant
Oval gears blocked by obstructions
Oval gear wheels blocked by
expansion of parts due to chemical
incompatibility
Flow rate too low - no pulse output
LED defective
Operation under lower start-up limit
Flow rate too high
Incorrect pulse value
OGM not sufficiently vented
82
PLUS
Remedy
Install OGM according to flow direction
indicated
Connection to PLC according to
specification
Reprogram OGM (PNP < > NPN)
Clean oval gears, connect fine filter
upstream if necessary
Replace affected parts (complete OGM if
necessary) - check chemical compatibility
BEFORE use
Increase flow
Use suitable OGM size
Replace OGM cover
Increase flow
Use suitable OGM size
Reduce flow rate
Use suitable OGM size
Determine pulse value and reprogramme,
if necessary
Vent metering system
Check OGM for trapped air bubbles and
vent metering system completely