GE Analytical Instruments ©2009 202 of 236 DLM 90488-01 Rev. A
External Inspection
• Confirm that there are no leaks present at the sample inlet or the waste connections.
• If the Analyzer is taking measurements, confirm that water is flowing from the waste
outlet.
• If you are experiencing erratic TOC readings, confirm that the pH of the waste stream is not
too high (see “pH of Sample Stream is Too High” on page 210 for details).
• Confirm that all cables are securely attached to the Analyzer.
• If you are sampling from 40 mL vials, confirm that the needle in the IOS System is not
obstructed. Loosen the 1/4" fitting at the Sample Inlet port and check that water flows out
of the stainless steel tubing when water is in the IOS System.
Internal Inspection
• Check for leaks throughout the Analyzer; there should not be moisture on the inside floor of
the Analyzer case.
• Confirm that oxidizer and acid remain in the reagent containers; also confirm that the
valve on each reagent container is open.
• Check the reagent syringes to make sure no large air bubbles are present (a small bubble
does not adversely affect analysis). Also inspect the syringes for leaks, and confirm that the
plunger moves during analysis. If excessive bubbles are present, a reagent flush should be
performed.
• Confirm that the sample pump is turning. If the pump is turning, sample should be flowing
from the waste stream.
• Check to make sure there are no leaks in the DI system, especially at valves and the stream
splitters.
• Confirm that the DI water reservoir is full.
• If maintenance work has recently been performed on the Analyzer, confirm that
electronics cables, such as the connector between the analog and ID boards, are securely
attached.
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