5800 Refrigerated Sampler Service Guide - Isco

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5800 Refrigerated Sampler Service Guide Section 1 Introduction and General Maintenance 4. Inspect the following: a. Pump tube – Look for excessive wear caused by the pump rollers and for cracks along the sides of the tube. Cracks might not be apparent unless you flex or squeeze the tubing. If cracks or excessive wear are evident, replace the pump tube (Section 1.4.2). G D A E F H I J C B Figure 1-2 5800 Pump A. Pump Tube F. Liquid Detector Cover B. Bulkhead Fitting G. Latch C. Tubing Coupler H. Knob D. Alignment Notches I. Pump Housing E. Alignment Collars J. Pump Housing Band CAUTION This sampler has a high performance pump. As with all such pumps, it relies upon liquid to cool working components. If the sampler is programmed to pump in the absence of liquid in excess of 5 minutes, excessive heat buildup may damage the paddles, rollers, and housing. Ensure that the liquid inlet is completely immersed. 1-6
5800 Refrigerated Sampler Service Guide Section 1 Introduction and General Maintenance A B B A Figure 1-3 Rollers (A) and guides (B) on the pump rotor b. Pump Rotor – Look for debris buildup on the pump roller or guide surfaces (Figure 1-3). Clean when needed (Section 1.4.3). c. Housing – Look for debris inside the pump housing. Clean as necessary (Section 1.4.4). Debris inside the housing is usually evidence that a pump tube failed. CAUTION Never use lubricants or solvents on the pump tube or rollers. Many chemicals they contain will attack the plastic and silicone, causing irreparable damage to the pump. 1.4.2 Pump Tube Replacement The correct sampler pump tubing is easily recognized by the blue alignment collars. Pump tubing from non-Isco vendors and tubes designed for other types of samplers should not be used. Incorrect pump tubing may result in poor pump performance or even cause parts to fail. Also note that the discharge tube is not the same as the pump tube. Refer to Figure 1-2 and the following steps to replace the pump tube. 1. Unplug the sampler to ensure that it will not attempt to operate the pump. 1-7
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