Mounting On A Tank Using The Mounting Bracket - ABB LST100 Operating Instructions Manual

2.3 Mounting on a tank using the mounting bracket

The mounting bracket can be used to reduce the effective
dead zone of the instrument, enabling measurement all the
way to the top of the tank. Install the bracket as follows:
1. Referring to Fig. 2.4, make a 92
the top of the tank using a hole puncher or other machining
method. Locate the hole:
– in an area with a minimum of 102 mm (4 in.) space
all around to enable access.
– at the highest point of the tank's surface to ensure the
sensor is installed perpendicular to the liquid surface.
+3
Ø 92 mm (3.54
-1
Hole
Fig. 2.4: Tank with a hole at the highest point of the tank's surface
2. Referring to Fig. 2.5, place a seal on the tank surface
around the hole and insert the bracket through the seal
and the hole. Note: the seal is used to prevent leakage
from the environment into the tank.
Seal
Fig. 2.5: Installing the mounting bracket on a tank with the seal
+3 +0.2
mm (3.54 in.) hole at
- 1 - 0.1
+0.2
in.)
-0.1
Tank
Bracket
3. Referring to Fig. 2.6, fit a seal over the bottom of the
bracket and fit the nut as shown. Tighten the nut to secure
the bracket.
Seal
Nut
Fig. 2.6: Securing the mounting bracket to the tank using the nut
4. Referring to Fig. 2.7, fit a seal to the LST100 transmitter
and screw the transmitter into the bracket by hand.
Note: Tighten the transmitter hand-tight only – do not
use tools. The seal is used to prevent leakage from the
environment into the tank.
Transmitter
Seal
Fig. 2.7: Installing the LST100 transmitter on the mounting bracket using
a seal
IMPORTANT (NOTE)
To ensure a tight seal, wrap PTFE-based tape
on the threads of the LST100 transmitter.
LST100 – Ultrasonic level transmitter | OI/LST100-EN 7