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Section No, l.G./ <br /> Revision No. 0 <br /> Date May 1, 1977 <br /> Page 4 of 5 <br /> <br />• <br /> DISASSEMBLE <br /> CLEEAN <br /> <br />EXAM <br />' 1 <br />INE <br />I <br /> REASSEMBLE <br /> CALIBRATION <br /> Figure 7.3 Maintenance requirements for rotameter service <br /> 7.4 Sampling Head <br /> Leaks in the sampling head are not experienced frequently. <br />• The welded seams and the condition of the guide pins on the top <br /> surface of the head should be checked initially by visual <br /> inspection. Should a defect be suspected, assemble the <br /> sampling head to the motor, install a filter for resistance, <br /> and apply a soap solution to the suspect problem aiea. Dis- <br /> assemble the sampling head and examine the inside of the <br /> head for the presence of soap solution. If the soap solution <br /> is present inside the sampling head a leak is present. Repair <br /> or discard the sampler head. <br /> 7.5 Motor Gaskets <br /> Two gaskets are employed with each sampler. The top <br /> gasket is approximately 3/16-inch thick rubber and the bottom <br /> gasket is approximately 3/4-inch thick foam rubber. Both <br /> should be inspected for wear and replaced if necessary. <br /> 7.6 Flow Transducer and Recorder <br /> There is no routine maintenance required with respect <br />. to this device. Should a malfunction occur, it should be <br /> replaced with a new recorder. <br />