Handheld ultrasonic flow meter troubleshooting - Just Measure it

Handheld ultrasonic flow meter troubleshooting

Power-on errors

When powered on, the ultrasonic flowmeter automatically starts the self-diagnosis process to find if there are any hardware and software problems. If a problem is identified, an error message will be displayed. The following table shows the possible error messages, the corresponding causes, and their solutions.

Error message  Causes Solutions
ROM Testing Error
Data Testing Error
Problem with the software (1)Reboot the system
(2)Contact the manufacturer.
Data Storing Error User-entered parameters get lost. When this message is displayed,
press ENT key to restoring the default configuration.
System Clock Slow or Fast Error Problem with the system clock or
the crystal oscillator.
(1)Power on again
(2)Contact the manufacturer
Date Time Error Problem with the system calendar Initialize the calendar in menu window M61
Reboot repetitively Hardware problems Contact the manufacturer

Working Status errors

The ultrasonic flow meter will show an Error Code (a single letter like I, R, etc.) in the lower right corner on menu windows M00, M01, M02, M03, M90, and M08. When any abnormal Error Code shows, counter-measures.

Error
code
The message displayed on window M08 Causes Solutions
R System Normal No error
I No Signal (1)Unable to receive signals
(2)Transducers installed improperly
(3)Loosen contact or not enough coupling between transducer and pipe outer surface.
(4)Pipeliners are too thick or the deposition inside of the pipe is too thick.
(5)Transducer cables are not properly connected
(1) Adjust measuring location
(2)Polish the pipe surface and clean the spot
(3)Make sure the couplant is enough
(4)Check the transducer cables
J Hardware Error Hardware problem Contact the manufacturer
H PoorSig Detected (1)Poor signal detected
(2)Transducers installed improperly
(3)Too much fouling (corrosion, deposition, etc.)
(4)The pipe liner is too thick.
(5)Problem with transducer cables
(1)Adjust measuring location
(2)Polish the pipe surface and clean the spot
(3)Make sure the couplant is enough
(4)Check the transducer cables
Q Frequ OutputOver The actual frequency for the Frequency Output
is out of the range specified by the user
Check the values entered in the window
M66, M67, M68, and M69, and use a larger value in M69
F System RAM Error Date Time Error CPU or IRQ Error
ROM Parity Error
(1) Temporary problems with RAM, RTC
(2) Permanent problems with hardware
(1) Turn on the power again
(2) contact the manufacturer
123 Adjusting Gain The instrument is in the progress of adjusting the gain for the signal,
and the number indicates the progressive steps
No need for action
K Empty pipe No liquid inside the pipe
Incorrect setup in M29
Relocate the meter to where the
the pipe is full of liquid Enter 0 in M29

ZeroInstrument

Other Problems and Solutions

Q: Why the instrument displays a 0.0000 flow rate while the liquid in the pipe is actually flowing? The signal strength is checked to be good (the working status is “R”) and the signal quality Q has a satisfactory value.

A: The problem is likely to be caused by the incorrect “Zero Point” setting. The user may have conducted the “Zero Point” setup while the flow was not standstill. To solve this problem, use the ‘Reset Zero’ function in the menu window M43 to clear the zero point.

Q: The displayed flow rate is much lower or much higher than the actual flow rate in the pipe under normal working conditions. Why?

A: The entered offset value might be wrong. Enter ‘0’ offset in window M44. Incorrect transducer installation. Re-install the transducers carefully. ‘Zero Point’ is wrong. Go to window M42 and redo the “Zero Point” setup. Make sure that the flow inside the pipe is standstill. No velocity is allowed during this setup process.

Q: Why the battery can not work as long as the time indicated on M07?

A: The battery may have come to the end of its service life. Replace it with a new one. The new battery is not compatible with the battery estimating software. The software needs to be upgraded. Please contact the manufacturer. The battery has not been fully charged. There is indeed a time difference between the actual working time and the estimated one, especially when the terminal voltage is in the range from 3.70 to 3.90 volts. Therefore, the estimated working time is for reference only

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