Emerson Rosemount 3308A, Справочное руководство, Страница: 44 / 226

4. Insert the split pins through the bushings and the probe.
5. Secure the split pins.
3.6 Anchor the probe
In turbulent tanks it may be necessary to fix the probe. Depending on the probe type,
different methods can be used to guide the probe to the tank bottom. This may be needed
in order to prevent the probe from hitting the tank wall or other objects in the tank, as well
as preventing a probe from breaking.
Flexible single/twin lead probe
The flexible single lead probe itself can be used for anchoring. Pull the probe rope through
a suitable anchoring point (e.g. a welded eye), and fasten it with a chuck.
Table 3-9: Required Torque and Hex Key Dimensions
Probe Required torque Hex key dimension
Flexible twin lead 4.4 ft-lb (6 Nm) 4 mm
Flexible single lead 4 mm wire, stainless
steel 3.7 ft-lb (5 Nm) 4 mm
4 mm wire, Alloy C-276 1.8 ft-lb (2.5 Nm) 3 mm
4 mm wire, Alloy 400 1.8 ft-lb (2.5 Nm) 3 mm
4 mm wire, Duplex
2205 1.8 ft-lb (2.5 Nm) 3 mm
The length of the loop will add to the Blind Zone. The location of the chuck will determine
the beginning of the Blind Zone.
Installation Reference Manual
February 2020 00809-0100-4308
44 Rosemount 3308 Series