User Manual

Maintenance a n d Troubleshooting 10-53
Problem
Individual P E AKVEL_1 or PEAKVEL_3 values
consistently read -9.99.
Possible
Causes
Sensor may be faulty.
5-volt fuse on regulator may have blown.
Possible
Solutions
Replace the Peak Combo Sensor or Surf ac e Combo
Sensor.
Replace t he 5-volt bl ue f use (when replaceabl e) on the
regulator.
Caution: Do not connect a questionable sensor to
another monitor before verifyi ng t he i ntegrity of the
sensor. A shorted sensor will blow the 5-volt (blue)
replacement fuse on the regulator in the monitor.
Surface Velocity Subsys tem
The following ta bles contain general troubl eshooting techniques for
the surface velocity subsystem corresponding to the Surface Combo
Sensor.
Problem
Veloci t y readings are erratic or incorrect.
Possible
Causes
Sensor may be dirty or covered by debris.
Maximum Velocity setting may require adjustment.
Transmit Frequ en cy setting may require adjust ment.
Possible
Solutions
Clean the sens or transmi t /receive surfaces.
Fine-tune Maximum Velocity setting i n device
parameters.
Test ot her Transm it Frequency settings i n the velocity
parameters.