7.3.11
Level measurement is lost in an empty tank
The transmitter reports "Level measurement lost" in an empty tank after closing the side
manway door.
Figure 7-11: Symptom
A
B
F
C
D
E
A. Level
B. Time
C. Actual level
D. Reported level
E. Level measurement lost
F. Manway door open
Possible cause
When the manway door is opened inward, it generates a disturbance echo which is
interpreted as the product surface echo. After closing the door, the echo is lost and the
transmitter reports "Level measurement lost". The message is cleared when start filling the
tank.
Recommended actions
•
Before opening the manway door, disconnect power to the transmitter.
•
After closing, restart the device.
•
Move the transmitter to another position.
Related information
Mounting position
Perform a device reset
Service and troubleshooting
Reference Manual
May 2021
00809-0200-4480
58
Rosemount 1408A Level and Flow Transmitter
