Teledyne 4220 installation and operation guide Mounting, Gun

4220 Flow Meter

Section 4 Submerged Probe Installation

To prevent debris from catching on the cable, it is important to attach the cable to the mounting ring so it offers as little resis- tance to the flow as possible. Attach the sensor cable to the down- stream edge of the ring, using the self-locking plastic ties supplied with the ring. Place the ties through the holes in the edge of the mounting ring and then lock them around the cable.

CAUTION

Do not overtighten the plastic cable ties; they should be tight- ened just enough to secure the cable in place, without greatly indenting the cable. Overtightening the plastic ties may col- lapse the reference tube in the cable, blocking it.

Scissors Assembly

Extensions

Base Section	Tightening the scissors assembly expands the ring to
	press firmly against the pipe wall, securing the ring.

Figure 4-5 Universal Mounting Ring Adjustment

4.3.3U-Channel or Invert It is possible to mount a probe in a U-channel or invert, but you

Mounting	will not be able to use the complete ring. You can use the base
	section only, and attach it to the U-channel surface with studs
	fired from a power-activated stud gun. Consult the factory for
	more information, if you must mount a sensor in a U-channel.

4.3.4Power-Actuated Stud If the conditions of your flow stream indicate that a more secure

Gun	method is needed to hold a mounting ring in place, a
	power-actuated stud gun is recommended. The stud gun may be
	rented or purchased locally. Also required are 1/4 in. - 20 U.N.C.
	threaded fasteners and power loads for the stud gun. The
	threaded fasteners are the studs that are shot into the wall of the
	channel by the gun.

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