Teledyne 4220 installation and operation guide Disassembling, Probe for Cleaning

	4220 Flow Meter
	Section 6 Maintenance and Service
6.3.2 Cleaning the	Occasionally, organic materials may become jammed inside the
Submerged Probe	submerged probe's housing. If this material swells as it becomes
Without Disassembly	saturated with water, it will exert pressure on the stainless dia-
	phragm placed over the transducer. In the unlikely event that all
	entrance ports in the submerged probe housing become blocked
	with material that does not permit the pressure above the probe
	to be transmitted to the pressure transducer, you may clean the
	probe with the following procedure:

	1.	Remove the submerged probe and its mounting apparatus
		from the flow stream.
	2.	Scrape any accumulated solids off the exterior of the sub-
		merged probe body with a brush.
	3.	Gently flush the inside cavity of the submerged probe with
		water. Do not use brushes or tools to try to remove matter
		lodged in the submerged probe's ports or cavity.
	4.	If the ports are clogged and do not clear with the running
		water, you may have to carefully disassemble the sub-
		merged probe.
6.3.3 Disassembling the	If you cannot clean the submerged probe sufficiently by washing
Probe for Cleaning	and brushing the exterior, or if you want to completely clean the
	unit prior to long-term storage, remove the probe from the flow
	stream and proceed as follows:
	1.	Clean the exterior of the submerged probe with a stiff
		brush and flowing water.
	2.	Remove the submerged probe nose section by unscrewing
		the two flat-head screws that hold the nose section in
		place.
	3.	Pull the nose section straight out of the probe body.
	4.	Flush the probe cavity with gently flowing water to wash
		out any accumulated solid materials.

Figure 6-2 Warning Disk Inside Probe

6-5