CETAC M-7600 Mercury Analyzer Operator's Manual

Operator’s Manual
Chapter 3: Installing the Analyzer
10 Watch the liquid flow as it makes its way from the autosampler rinse station, to
the pump, through the mixing tee, and to the Gas-Liquid Separator.
The GLS will begin to fill with rinse solution.
11 Increase the clamp tension on both of the drain tubing clamps (Channels one &
two) until flow begins from the drain port of the GLS and the liquid level
begins to drop.
Do this quickly before the GLS fills to the point where fluid overflows the GLS.
The GLS should slowly drain to empty, even though sample continues to be
delivered to the top of the frosted center post. The GLS is intended to operate
“empty” with only a thin film of liquid continuously wetting the frosted center
post and exiting the drain.
NOTE
If GLS overflow occurs, the pump will stop. To restart the pump, simply click
the Pump On button.
12 Tighten both drain tube clamps equally to ensure even flow to each.
Check this by observing the segmented flow at both drain tees. The rate of flow
in and out should be balanced through both Santoprene drain tubes. Adjust the
clamp tension to keep the GLS empty and to achieve a smooth, balanced,
segmented flow. Unstable drain flow can cause baseline noise in the system.
The drain tube tension should exactly match the sample flow tension.
13 Start the SnCl 2 flow.
‣ Place the SnCl 2 uptake tube in the reagent bottle
‣ Close the Channel 4 clamp.
‣ Increase the reagent clamp tension until reagent uptake begins in the tube.
‣ Adjust the clamp so that the flow from the SnCl 2 bottle is smooth, with no
jerks in the flow.
14 Once liquid is running through the QuickTrace M-7600, note that the drain
tubing clamp tension is properly adjusted by watching the flow through the
Gas-Liquid Separator.
The GLS should remain empty and liquid exiting the GLS should appear nearly
motionless, with no flutter or instability.
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