822-1002-C01 datasheet(6/40 Pages) MAGNETROL

6 / 40 page

50-621 Kotron Sentinel Models 822, 832 and 842 RF Point Level Switches

1.4

Mounting

The Model 822, 832 or 842 switch can be mounted to

a tank using a variety of process connections. Generally,

either a threaded or flanged connection is used. For infor-

mation about the sizes and types of connections available,

see Probe Brochure 50-125.

Make sure all mounting connections are properly in place

on the tank before installing the probe. Make sure the

Kotron probe is correct for the intended installation.

It is common practice to use the metal tank wall as the

reference electrode. In such cases, it is required that the

probe housing makes a good electrical connection to the

tank wall. If there is any doubt about this connection or

to the use of PTFE thread tape gaskets, paint, rust, or any

other reason, a separate strap should be installed between

the probe housing and the tank.

Caution: This unit contains CMOS electronics which may be

damaged by static electricity. Do not touch any semi-

conductor devices unless you are properly grounded.

Caution: When a probe is used in an abrasive medium, inspect the

probe periodically for visible surface wear. If damage to

the probe insulation is found, replace the probe.

Metal Walled Tanks

On water-based liquids, there should be no problem with

sensitivity or linearity. With non-conductive, low dielectric

media, sensitivity can be enhanced by locating the probe

close to and parallel with the tank wall. If this is not prac-

tical, a ground reference probe may be the solution.

Non-Metallic and Glass-Lined Tanks

With plastic, concrete, wood, or any other non-conductive

walled vessels a ground reference is required. Most com-

monly, this electrode will be in the form of a concentric

ground tube (i.e., stilling well). In questionable circum-

stances, consult the factory. In all cases, a good electrical

connection must be made between the ground surface and

the probe housing.

Switch/Probe Assembly

Switches with probes up to and including 12 inches

(300 mm) in length are shipped pre-assembled. All other

switches are shipped unassembled to avoid damage during

transit. These transmitters must be assembled prior to

mounting. Choose your particular configuration from the

following sections and follow the instructions carefully.

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