Checking The Inlet Tubing; Backflushing The Analyzer - GE Sievers 900 Series Operation And Maintenance Manual

Checking the Inlet Tubing

If sampling from a container, you can confirm that sample is properly being drawn in to the
Analyzer by introducing a small air bubble into the tubing and then tracking its movement. Simply
remove the tubing from the liquid level in the container for a few seconds, and then replace the
tubing. You should observe an air bubble in the tubing; if the bubble moves through the tubing and
into the Analyzer, the inlet tubing is not obstructed.
No sample will flow through the Analyzer under the following conditions: the sample pump is not
operating; the 60-µm stainless steel in-line filter (for on-line sampling) is clogged; or the 1/16"-OD
Teflon inlet or outlet lines (for grab sampling) are over-tightened and have collapsed.
If air is still not drawn into the Analyzer or water is not flowing out of the Analyzer, replace the pump
tubing.

Backflushing the Analyzer

When there is a lack of flow through the Analyzer, a flush of the sample side or DI side fluidics can
clear clogs in the tubing. To flush the Analyzer, you will need the water bottle from the Analyzer's
accessories kit, a small length of tubing (similar to the sample pump tubing), and paper towels.
Make sure that the inlet and waste lines are still connected to the Analyzer; the sample pump will
run during this procedure.
1. Power on the Analyzer and start analysis (if you prefer not to start analysis, you can turn
the sample pump on by selecting Maintenance tab
Pumps Sample Pump
2. Open the Analyzer front panel by turning the two latches and swinging the panel door to
the left.
3. The first task is to test the sample side for an obstruction. Disconnect the two pieces of
sample pump tubing from the Y-fitting (see Figure 40).
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Advanced Diagnostics
DLM 90488-01 Rev. A
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