Emerson MSP422 manual Mounting the Transmitter Above the Liquid Surface, Procedure

Reference Manual

IP2013, Rev BA

February 2012

Mobrey MSP422

Mounting the Transmitter Above the Liquid Surface

A 2-in. thread is provided to mount the transmitter. The thread form is either 2-in. BSPT or 2-in. NPT, and is clearly marked on the hexagon of the transmitter body.

NOTE:

The Mobrey MSP422 is designed to be mounted in a non-metallic fitting or flange. The use of metallic fittings/flanges is not recommended.

To help installation, flange accessories and bracket kits are available from Mobrey.

Procedure:

1.Ensure that the transmitter is perpendicular to the liquid surface to maximize the return echo size.

2.Check that the maximum liquid level will not enter the 12-in. (0,3 m) blanking zone of the transmitter.

3.When installing in a tank with a nozzle or stand-off (Figure 3-2 on page 3-6):

a)Use PTFE tape on the screw thread (Figure 3-2 on page 3-6).

b)Lower transmitter into the tank through the process connection.

c)Turn the transmitter until it is properly secured in the process connection (Figure 3-2 on page 3-6).

d)Tighten to a torque of 1.5 lbf.ft (2 Nm) using the hexagon. Do not use the transmitter housing to tighten.

NOTE:

If the transmitter face does not protrude into the vessel, note the dimensions in Table 3-1 for Figure 3-2, and ensure that the nozzle/vessel weld is smooth and free from internal weld beads or other projections.

4.When installing using a bracket kit (Figure 3-3 on page 3-6):

a)Attach bracket to the disc using the 3 screws provided.

b)Attach bracket and disc to a support. The combined weight of bracket and disc is 16 oz (0,5 kg). For transmitter weight, see "Specifications" on page A-1.

c)Use PTFE tape on the screw thread of the transmitter (Figure 3-2 on page 3-6).

d)Insert the transmitter into the disc.

e)Tighten to a torque of 1.5 lbf.ft (2 Nm) using the hexagon. Do not use the transmitter housing to tighten.

NOTE:

The bracket kit contains a stainless steel angle bracket and PVC threaded disc, which may be used to mount the transmitter on a support over the liquid surface. The bracket and disc dimensions are in Figure A-4 on page A-4.

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