ABB 2600T Series Instruction Manual page 26

26 2 6 0 0 T S E R I E S | P R E S S U R E T R A N S M I T T E R S | O I/ 2 6 6/ F F - E N R E V. E
Liquid level measurements on closed tanks and non
condensable fluids (dry leg)
• Mount the transmitter at the same height or below the lowest
level to be measured.
• Connect the + (H) side of the transmitter to the bottom of the
tank.
• Connect the - (L) side of the transmitter to the upper part of the
tank, above the maximum level of the tank.
Figure 30: Level measurement on closed tank with dry leg
Liquid level measurement with closed tanks and
condensable fluids (wet leg)
• Mount the transmitter at the same height or below the lowest
level to be measured.
• Connect the + (H) side of the transmitter to the bottom of the
tank.
• Connect the - (L) side of the transmitter to the upper part of the
tank.
• Fill the vertical section of the connecting line to the upper part of
the tank with a compatible liquid through the dedicated filling
tee.
Figure 31: Level measurement on closed tank with wet leg
Liquid level measurement with open tanks
• Mount the transmitter at the same height or below the lowest
level to be measured.
• Connect the + (H) side to the bottom of the tank.
• Vent the "–" (L) side of the transmitter to the atmosphere (in this
case a gauge pressure is shown; the (L) side is already vented to
the atmosphere).
Figure 32: Level measurement on open tank with P style transmitter