Fill Level Measurement On Closed Tanks - ABB 2600T Series Operating Instruction

8.12.3 Fill level measurement on closed tanks

Non-condensing measuring medium (dry leg)
Fig. 21: Level measurement on closed tanks (dry leg)
Mount the transmitter at the same height or below the lowest
level to be measured.
Connect the high pressure side "+" (H) of the transmitter to the
bottom of the tank.
Connect the low pressure side "-" (L) of the transmitter to the
top of the tank, above the maximum level.
28 OI/266CXX/266JXX/HART-EN Rev. B | 266CRx, 266JRx, 266CSx, 266JSx
Condensing measuring medium (wet leg)
Fig. 22: Level measurement on closed tanks (wet leg)
Mount the transmitter at the same height or below the lowest
level to be measured.
Connect the high pressure side "+" (H) of the transmitter to the
bottom of the tank.
Connect the low pressure side "-" (L) of the transmitter to the
top of the tank, above the maximum level.
Fill the vertical part of the impulse line of the low pressure side
with a compatible filling liquid via the appropriate filling
connections.