Siemens Bently Nevada 3500 Proximitor - Page 38

Chapter 3 — Maintenance and Troubleshooting
21
Fault Type 3: -1 Vdc < V
SIG
< 0 Vdc
Possible causes:
• Probe is incorrectly gapped (too close to target)
• Incorrect power source voltage
• Faulty Proximitor Sensor
• Probe is detecting other material than target (counterbore or machine case)
• Short or open circuit in a connector (dirty or wet) or loose connectors
• Short or open circuit in the probe
• Short or open circuit in extension cable
Check for fault condition Type 1 on page 14
Is the probe gapped correctly?
Are counterbore dimensions correct?
(see probe installation on page 2)
No
Re-gap the probe
or check
counterbore.
Retest system.
Yes
N
Step 2 Step 1
Original probe/extension
cable
Known good probe with correct length
cable (open gap with probe held away
from conductive material)
V
SIG