N4L PPA55 Series - Page 133

PPA55xx Quick User Guide
Page 132
Basic Fault Symptoms and Causes
Symptom
Cause
Noisy trace on external voltage input
Possible damage to analogue front end
circuitry caused by excessive voltage
Noisy trace on external current input
Possible damage to analogue front end
circuitry caused by excessive current
Flat trace on external voltage input
Possible damage to digital circuitry in
voltage card
Flat trace on external current input
Possible damage to digital circuitry in
voltage card
Incorrect Voltage reading on External
Input
Possible damage to input attenuator
caused by excessive voltage
Incorrect Current reading on External
Input
Possible damage to input attenuator
caused by excessive voltage.
Incorrect Voltage reading on Internal
Input
Possible damage to input attenuator
caused by excessive voltage
Incorrect Current reading on Internal
Input
Possible damage to current shunt
caused by excessive current
Incorrect Harmonic magnitude on
external input
Possible damage to analogue input
circuitry / Incorrect frequency
detection
Incorrect Harmonic magnitude on
internal input
Possible damage to analogue input
circuitry / Incorrect frequency
detection
If you find any of the faults described above, please contact Newtons4th Ltd or
alternatively your local distribution office.
Email: support@newtons4th.com