CETAC M-7600 Mercury Analyzer Operator's Manual

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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. 72
CETAC QuickTrace M-7600 Mercury Analyzer Chapter 3: Installing the Analyzer 15 The flow into the GLS should be as smooth and pulse free as possible. View this closely at the top of the GLS frosted center post. The liquid should stream continuously from the capillary tip to the top of the post, and the liquid column spanning the gap between the capillary tip and post should be nearly “motionless,” with minimal fluctuation and no jerkiness or discontinuity. If this is not the case check that the “gap” between the bottom of the GLS capillary insert tube and the top of the GLS frosted center post is ~0.5 mm (range of 0.3- 0.6 mm). If not, very carefully slide this insert up or down, as needed. Refine the clamp tension of the sample and reagent channels as needed to stabilize the liquid flow to the GLS. A flow check with a 10 mL graduated cylinder (less than 100 mm tall) and stopwatch should yield a sample uptake rate of ~15 mL/min, and a reagent uptake rate of ~5.7 mL/min. Check liquid flow stability at the drain exit of the GLS after final adjustments of clamp tension to sample and reagent pump tubing. The pump tension will not need further adjustments; do not adjust pump tension to compensate for worn pump tubing. NOTE: When properly adjusted the tension on the bottom three peristaltic pump tubes (channels 1-3) should be the same and the tension screw for the top pump tube (reagent tube, channel 1) should be screwed in 1 to 2 mm farther than the other channels. Step 15: Check the Reagent Flow 1 Fill the 10 mL graduated cylinder with 10 mL DI water. 2 Simultaneously place the reagent uptake tube in the graduated cylinder and start the stopwatch. 3 After 30 seconds, remove the uptake tube from the cylinder. 4 Measure the water remaining in the cylinder, and calculate the reagent flow rate. Step 16: Check the Sample Probe Flow 1 Fill the 10 mL graduated cylinder with 10 mL DI water. 2 Move the sample probe to the middle of the sample rack. (1:35 if set for a 60 position rack). 3 Position the graduated cylinder beneath the sample probe. 4 Simultaneously click the Down button and start the stopwatch. 73
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CETAC M-7600 Mercury Analyzer Opera
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Contents 1 Introduction ...........
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M-7600 Mercury Analyzer Operator's
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1 Introduction Overview The CETAC Q
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CETAC QuickTrace M-7600 Mercury Ana
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2 Preparing for Installation Instal
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6 Troubleshooting the Mercury Analy
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8 Glossary A Amperes, electrical cu
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ng Nanogram (10 -9 gram), mass or w
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Index autosampler data cables, 44,
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Manual Part Number 480195 Rev 2 Pri
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