Speed Measurement System - ABB TRS 61D01 Operation Manual

Operation Manual / TPS48-D/E.. - TPS61-D/E..
6 Troubleshooting / 6.5 Speed measurement system

6.5 Speed measurement system

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Run-down time too short
Possible causes
Turbochar- Turbocharger contaminated
ger
Damaged bearing
Rubbing rotor
Foreign object in turbocharger
Possible causes
No signal or Fitting error
amplitude is
poor
Defective sensor Contact an ABB Turbocharging Service Sta-
Measured Contaminated
speeds too sensor tip
high
Measured - -
speed too low
Other sources - -
of errors
HZTL2410_EN
Elimination
Clean it
Contact an ABB Turbocharging
Service Station
Elimination
The screw plug for the sensor is fitted with
an additional gasket (copper ring).
When fitting the speed sensor, this gasket
must be removed. If the gasket is fitted by
mistake, the distance from the sensor tip
to the signal-generating sealing disc in-
creases. As a result, the voltage amplitude
of the speed signal decreases, which can
cause problems for the evaluation elec-
tronics.
This problem is eliminated by removing
the gasket.
tion
The sensor tip is magnetic and can thus at-
tract metal particles. As a result, the dis-
tance to the signal-generating sealing disc
is reduced, which can lead to amplification
of the noise component and consequently
to faulty triggering.
Dismantle the sensor, clean its tip and refit
the sensor using the specified tightening
torque.
Contact an ABB Turbocharging Service Sta-
tion
If none of the above measures eliminates
the malfunction, we recommend that you
have the speed measuring system inspec-
ted by an ABB Turbocharging Service Sta-
tion.
Rev.F March 2020