Siemens Milltronics 7ML1201-1FE00 Manuel D'instructions page 11

Supplement
Loading vs. Supply Voltage
Troubleshooting
The echo is not reliable and The Probe is waiting for a valid echo before updating the
measurement.
Probable causes are:
• material or object in contact with sensor face
• The Probe is too close to the fill point
• The Probe is not perpendicular to the liquid surface
• change in level too fast
• measurement out of range
• foam on liquid surface
• high level of vibration in the mounting structure
• level inside the blanking zone
The `Waiting' period has expired. Investigate the probable causes listed above.
Refer to Speed of Response on page or Fail-safe Timer on page 13 for duration of
`Waiting' periods.
Maintenance
The Probe requires no maintenance or cleaning.
Patents
Instrument Housing Design:
• Canada:
• U.S.A.:
• Germany:
• U.K.:
• France:
• Japan:
Electronics / Sensor:
• U.S.A.:
• U.K.:
• patent applications in U.K., Canada, Europe, Africa, Australia
7ML19981GD61
70345
07/858/707
M92022723
2021748
921873
966217
5,267,219
5,339,292
2,260,059
The Probe – INSTRUCTION MANUAL Page 9