30-0951RK LEL Sample Draw Aspirator Adapter Operator’s Manual Part Number: 71-0017RK Revision: A Released: 6/2/10 www.rkiinstruments.
Product Warranty RKI Instruments, Inc. warrants gas alarm equipment sold by us to be free from defects in materials, workmanship, and performance for a period of one year from the date of shipment from RKI Instruments, Inc. Any parts found defective within that period will be repaired or replaced, at our option, free of charge. Parts must be returned to RKI Instruments, Inc. for repair or replacement.
Overview This manual describes the LEL sample draw aspirator adapter. It also describes how to install and use the adapter. A spare parts list at the end of this manual lists replacement parts. Specifications Table 1 lists specifications for the LEL Sample Draw Aspirator Adapter. Table 1: Specifications Applicable Sensors Consult RKI Instruments, Inc.
Description The LEL Sample Draw Aspirator Adapter uses compressed air flowing through a venturi to draw air into a sample chamber. The sample draw adapter screws directly onto the LEL sensor in place of the rain shield which is normally screwed onto the detector. Adapter Gasket (in bottom of adapter) Screw Onto Combustible Sensor Sensor Adapter Flowmeter Sensor Chamber Chamber O-ring (in top of chamber) Pressure Regulator 1/4 O.D.
compressed air and the air drawn from the sensor chamber into the top port of the aspirator both exhaust at the right side of the aspirator. Sensor Adapter The sensor adapter screws directly onto the LEL sensor. It is installed hand tight. It has a gasket inside it which seals against the sensor. When removing this adapter to change the sensor, be sure not to lose this gasket. Sensor Chamber The chamber has three thumbscrews which fasten it to the sensor adapter.
2. The sample draw adapter is normally shipped installed to the detector. If not, screw the sensor adapter onto the detector and then attach the chamber (with the regulator, aspirator and flowmeter attached) onto the sensor adapter with the three captive thumbscrews. 3. Connect a sample line from the area to be sampled to the inlet fitting on the flowmeter. The fitting accepts 1/4” OD rigid metal tubing such as copper, aluminum or stainless steel tubing. 4.
Parts List Table 2 lists replacement parts and accessories for the sample draw adapter. Table 2: Parts List Part Number Description 06-1248RK Tubing, 3/16 x 5/16, polyurethane, for calibration kit 07-7016RK-01 O-ring, .614 ID x .070, buna, quad, for adapter 07-7225RK O-ring, 1.243 ID x .139, buna, for chamber 13-1070RK Captive panel screw, 10-32 x 1.
