EasyManuals Logo

Micronics U3000 User Manual

Micronics U3000
61 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #47 background imageLoading...
Page #47 background image
U3000/U4000 User Manual 43
(Issue 2.0)
6: Troubleshooting
6.1 Overview
If you have a problem with your flow monitoring system it can be due to any of the following:
Faulty instrument
Blank instrument display:
Loss of power supply to the instrument.
Internal power supply fuse ruptured.
Scrambled instrument display
Reboot the instrument by temporarily disconnecting its power supply.
Incorrect setup
A low, or zero, signal could be caused by incorrect set-up such as:
Incorrect site data entered into the instrument.
Incorrect or non-matching ultrasonic transducers selected for use.
Incorrectly fitted transducers – lack of couplant applied, incorrect spacing, insecure attachment.
Poor connections between the probes and the instrument.
Application problem
If you are certain that the instrument is healthy and suitably set-up for the current site; and the probes are
properly assembled and fitted correctly, there could be an application problem concerned with the site.
Check such conditions such as:
Poor pipe outer surface quality
Uneven surface preventing good surface contact with the transducer.
Flaking paint (should be removed).
Variable air gap in concrete-covered pipes affecting the ultrasonic signal quality.
Poor internal pipe construction
Rough internal pipe walls affecting fluid flow (see roughness factor).
Internal welds positioned in the transducer signal path affecting the signal quality.
The ‘drippings’ in galvanised-dipped pipes or other irregularities interfering with the signal path.
Incorrect probe location
Transducers located too close to bends or valves, disturbing the flow profile.
Transducers located too close to insertion probes, disturbing the flow profile.
For horizontal pipework transducers should not be positioned on the top of the pipe.
Poor fluid conditions within the pipe
Fluid contains bubbles, high particle density or sludge.
Air in the top of the pipe.
Low fluid flow within the pipe
Pipe obstructions.
Malfunctioning valve not opening fully (or closed inadvertently).
Liquid content problems
Multiple liquid contents do not comply accurately to expected sound speed criteria.
Very hot pipe almost turns water to steam and therefore exhibits the wrong speed characteristics –
could be due to reduced pipe pressure.
Flashover – liquid turns into a gas because of lower than required pressure.

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Micronics U3000 and is the answer not in the manual?

Micronics U3000 Specifications

General IconGeneral
BrandMicronics
ModelU3000
CategoryMeasuring Instruments
LanguageEnglish

Related product manuals