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Bulk Solids Probes
Installation Guidelines (Models 7ML1304-2, 7ML1302-2)
The Model 7ML1304-2 and 7ML1302-2 Bulk Solids probes are designed for a 1360 kg (3000
lb) pull-down force for use in applications such as sand, plastic pellets and grains. It is
offered with a maximum 22 m (75 ft) probe length.
Model 7ML1304-2 Flexible Single Rod — to be mounted in applications with a dk≥ 4
Model 7ML1302-2 Flexible Twin Rod — dielectric dk ≥ 1.9
Applications:
Plastic pellets, sugar: dk≥ 1.9 to 2.0
Grains, seeds, sand: dk ≥ 2.0 to 3.0
Salts: dk≥ 4.0 to 7.0
Metallic powder, coal dust: dk> 7.0
Mounting Recommendations
1.
Use a weight instead of securing the probe to the vessel.
2.
Mount probe at least 12" (305 mm) from the wall. Ideal location is 1/4 to 1/6 the
diameter to average the angel of repose.
3.
A metal flange must be used when mounting on plastic vessels.
Installing Model 7ML1302-2 bulk solids flexible twin rod probe
1.
Make sure the process connection is at least 2" NPT or a flanged mounting.
2.
Make sure that there is at least 25 mm (1") spacing between the active probe rod
and any part of the tank (walls, stillwell, pipes, support beams, mixer blades, etc.).
Minimum stillwell diameter for Twin Rod probe is 76 mm (3").
3.
Carefully place the probe into the vessel. Align the gasket on flanged installations.
4.
Align the probe process connection with the threaded or flanged mounting on the
vessel.
5.
For threaded connections, tighten the hex nut of the probe process connection. For
flanged connections, tighten flange bolts.
Probe can be shortened in the field:
a.Loosen and remove the two cable clamps.
b.Slide the weight off of the probe.
c.Cut the cable to the required length.
d.Remove 305 mm (12") of the rib between the two cables.
e.Strip 152 mm (6") of coating from the two cables.
f.Slide the weight back on to the probe.
g.Reinstall the two cable clamps and tighten.
h.Enter the new probe length (inches or cm) in software.
Installing Model 7ML1304-2 bulk solids flexible single rod probe
1.
Make sure the process connection is at least 2" NPT or a flanged mounting.
2.
Carefully place the probe into the vessel. Align the gasket on flanged installations.
7ML19985KA02
SITRANS LG200 – INSTRUCTION MANUAL
Page 33
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