6100CR Refrigerated Sampler - Isco

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6100CR Refrigerated Sampler Section 4 Maintenance and Special Features 2. The needle assembly consists of the needle, a heavy coil spring, three long slide rods, and four plastic rings. The plastic rings are knurled (lines on their surface). These rings are the needle mounts. 3. To remove the needle assembly, loosen the guide nut, the top gray plastic nut in the middle of the assembly. 4. Remove the drain hose from the bottom of the assembly. 5. Push up on the ball on the lower end of the needle assembly to compress the ball and remove the top remaining nut. Note There is spring pressure on the assembly forcing it down. Hold the assembly up while removing the nut, then release slowly to prevent damage to the needle assembly. When pressure is released, disconnect the sample tube from the top of the needle and remove the assembly from the tower. 6. Remove the needle from the assembly by removing the three screws holding the guide rods to the needle on the bottom. DO NOT loosen the retaining nuts on the top end of the slide rods. Pliers may be required to hold the slide rods while removing the screws. Remove the slide rods and unscrew the needle from the top needle mount, then remove the guide and spring. 7. Reassemble in the reverse order. Make sure the needle assembly is seated against the top mount before tightening the nut. Align the drain tube fitting with the hose slot and make sure the slide rods are not twisted. Tighten the gray guide nut in the middle of the needle assembly until it contacts the mount. The assembly should still be able to move with light pressure applied to it. Note When reassembling the needle and tower, do not use tools to tighten the plastic mounting rings. You only need to finger-tighten them. You can use pliers to tighten the needle into the top mounting ring, but do not apply excessive force. 4-2
6100CR Refrigerated Sampler Section 4 Maintenance and Special Features 4.2 Needle Alignment When replacing the needle it is necessary to make sure that the needle aligns with the bottle to guarantee proper sealing and operation of the mechanism. Use the following procedure to ensure alignment. Figure 4-2 Needle Assembly Completed Figure 4-3 Needle Assembly Parts 1. With the front shell still removed and the sample supply turned off, visually align the needle over the bottle rack, both side-to-side and front-to-back, leaving the gray nut at the needle support loose. Set the sampler to run a single bottle manual sample with no strainer purge. 4-3
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6100CR Refrigerated Sampler - Isco

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