KRAL OMG Series User Manual

11 Maintenance
11.1 Required maintenance
Requirement:
ü The ambient conditions correspond to the operating data
ü Flowmeter connection to the pipe system is stress-free
ü Pipe system is free of solid particles
ü Pipe system vented
ü Shut-off devices in the feed line and outlet opened
Switch on the system.
ð The flowmeter is ready to operate.
11 Maintenance
11.1 Required maintenance
Flowmeters are fundamentally maintenance-free. Under observance of the operating limits Ä Tech-
nical data,Page8, no significant change in the characteristics could be established, even after years of
use in many cases. Stresses lying clearly above the rated flow rate can, however, result in excessive
wear. In the case of liquids with higher abrasiveness (for example heavy fuel oil with catalyst residues,
plastic components with fillers, etc.) strongly accelerated wear can occur in the flowmeter.
Notice In cases of doubt the manufacturer recommends already carrying out the first inspection after twelve
weeks operation time.
11.2 Maintaining flowmeters
The following table lists signs of progressive wear of individual elements of the flowmeter:
Finding Cause Elimination
Increased running noises Incipient damage to bearing
Replace the bearing.
Leakage Damage to sealing
Replace the seals or dry
sleeve.
Measured values not realistic Ä Troubleshooting,Page42
Ä Troubleshoot-
ing,Page42
Tab.10: Check table for required maintenance
Personnel qualification: o Fitter
Personal protective equipment: o Work clothing
o Face protection
o Protective gloves
o Safety boots
WARNING
Risk of injury through emitted pumped liquid.
Pumped liquids can be hot, poisonous, combustible and caustic.
► Wear personal protective clothing during all the work. Ensure face protection.
► Collect any discharging pumped liquid safely and dispose of it in an environmentally compatible
manner in accordance with the applicable local regulations.
1. Check the flowmeter visually and acoustically every four weeks.
2. Check for signs of wear as listed in the table above and eliminate the cause.
11.3 Recalibration of the flowmeter
In order to maintain the high measuring precision of the flowmeter, the manufacturer recommends car-
rying out the first recalibration after about one year of operation. The results reveal any wear starting
on the measuring unit. The interval at which recalibrations are actually required depends strongly on
the operating conditions of the flowmeter.
The manufacturer provides the factory calibration as standard. If higher requirements are placed on the
flowmeter, accredited calibration in accordance with EN/ISO/IEC17025 is also possible.
Operating instructions
OIO 14en-GB Edition 2020-01
31

KRAL OMG Series Specifications

General

Brand	KRAL
Model	OMG Series
Category	Measuring Instruments
Language	English