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Summary of Contents for RKI Instruments 35-3001-01H-DIL
- Page 1 35-3001-01H-DIL Hydrogen Sample-Draw Detector Operator’s Manual Part Number: 71-0381 Revision: A Released: 8/3/17 www.rkiinstruments.com...
- Page 2 Typical calibration frequencies for most applications are between 3 and 6 months, but can be required more often or less often based on your usage. 35-3001-01H-DIL Hydrogen Sample-Draw Detector...
- Page 3 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 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.
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Page 4: Table Of Contents
Parts List ..............20 35-3001-01H-DIL Hydrogen Sample-Draw Detector... -
Page 5: Overview
About the 35-3001-01H-DIL The 35-3001-01H-DIL is designed to monitor hydrogen in an inerted area (an area that has no, or almost no, oxygen present). The catalytic LEL sensor used to detect hydrogen must have at least 5% oxygen present to detect gas properly. - Page 6 When using the 35-3001-01H-DIL, you must follow the instructions and warnings in this manual to assure proper and safe operation of the 35-3001-01H-DIL and to minimize the risk of personal injury. Be sure to maintain and periodically calibrate the 35-3001-01H-DIL as described in this manual.
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Page 7: Description
AMP 1 AMP 2 Interconnect Terminal Stri p Thi s End To Inl et Fitting 3/4" Conduit Hub Particle Filter INLET Inl et Fitting EXHAUST Exhaust Fitting Figure 1: Hydrogen Sample-Draw Detector Component Location 35-3001-01H-DIL Hydrogen Sample-Draw Detector • 3... -
Page 8: External Components
Flowmeter Exhaust Pump Restrictor Flowmeter PCB Sensor Sensor Flow Control Valve Dilution Fitting, Inlet approx. 1:1 ratio Pressure Switch Particle Filter Hydrophobic Filter Figure 2: Hydrogen Sample-Draw Detector Flow Diagram 4 • 35-3001-01H-DIL Hydrogen Sample-Draw Detector... - Page 9 A ball in the flowmeter column indicates the flow rate to the LEL sensor which is the sample flow plus the dilution flow. The flowmeter measures the flow in the range 0.2 to 2.0 SCFH (Standard Cubic Feet per Hour). The optimum flow rate is 0.8 SCFH. 35-3001-01H-DIL Hydrogen Sample-Draw Detector • 5...
- Page 10 The pump is mounted to the right side of the main circuit board. The pump pulls the gas sample into the sample-draw detector. The pump operates on 24 VAC, which is generated from the 24 VDC supplied by the controller. 6 • 35-3001-01H-DIL Hydrogen Sample-Draw Detector...
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Page 11: Installation
Ø .30 x .50 (4X) M OUNTING 1.13 4.00 Pilot Fail Sample Drawing Gas Detector 8.88 8.50 35-3001 www.rkiinstruments.com 4.50 NOTE: Housing i s 4.3 inches deep Figure 3: Outline and Mounting Dimensions Close and latch the housing door. 35-3001-01H-DIL Hydrogen Sample-Draw Detector • 7... -
Page 12: Connecting The Sample Lines To The Sample-Draw Detector
1/4” O.D. rigid polypropylene, Teflon, or flexible polyurethane tubing may be used. RKI Instruments, Inc. recommends using either 1/4” O.D. x 1/8” I.D. or 1/4” O.D. x 0.170” I.D. tubing based on your length requirements. See “Specifications” on page 1 for maximum tubing lengths based on tubing size. -
Page 13: Wiring The Sample-Draw Detector To A Controller
Push 1/4” O.D. rigid polypropylene or rigid Teflon sample tubing into the fitting until it stops. Flexible polyurethane tubing may be used with an appropriate insert. RKI Instruments, Inc. recommends using either 1/4” O.D. x 1/8” I.D. or 1/4” O.D. x 0.170” I.D. tubing based on your length requirements. - Page 14 Connect the wires to the applicable detector/transmitter terminal strip at the controller as shown in Figure 4. Refer to the controller operator’s manual and the controller detector head specification sheet for the 35-3001-01H-DIL for detector/terminal strip connections specific to the controller.
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Page 15: Start Up
Setting the Zero Reading Since the 35-3001-01H-DIL monitors an inerted area, in order to set the zero reading, the inlet line must be moved to a fresh air area, the inlet line must be removed so that sample is being drawn through the inlet fitting (if the instrument is mounted in a fresh air area), or a zero air cylinder must be used. -
Page 16: Maintenance
If the display reading is not 0 %LEL, set the zero reading as described in “Calibration” on page 18 then continue this procedure. Performing the response test Screw the fixed flow regulator into the hydrogen calibration cylinder. Attach the gas bag tubing to the regulator on the hydrogen calibration cylinder. 12 • 35-3001-01H-DIL Hydrogen Sample-Draw Detector... -
Page 17: Troubleshooting
Connect a 0-2 SCFH flowmeter to the inlet fitting or the inlet line and confirm the flow is above the low flow setpoint of 1.0 SCFH while holding down the reset switch. NOTE: RKI Instruments, Inc. offers a 0 -2 SCFH flowmeter but tubing connection fittings must be user installed to the flowmeter’s 1/8” NPT female fittings. -
Page 18: Replacing Components Of The Sample-Draw Detector
If the fail condition continues, replace the sensor as described in “Replacing Components of the Sample-Draw Detector” on page 14. If the fail condition continues, contact RKI Instruments, Inc. for further instruction. Slow or No Response/Difficult or Unable to Calibrate Symptoms •... - Page 19 Remove the particle filter from the tubing stub. Install the new particle filter onto the tubing stub. Be sure the arrow on the particle filter is pointing toward the inlet line. Turn on power to the controller. Turn on the controller. 35-3001-01H-DIL Hydrogen Sample-Draw Detector • 15...
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Page 20: Adjusting The Low Flow Setting
Install a 0-2 SCFH flowmeter with an adjustment valve at the inlet of the sample-draw detector. NOTE: RKI Instruments, Inc. offers a 0 - 2 SCFH flowmeter but tubing connection fittings must be user installed to the flowmeter’s 1/8” NPT female fittings. -
Page 21: Removing The Particle Filter's Tubing Stub, If Necessary
Screw the inlet fitting tube nut back onto the fitting body. See “Connecting the Sample Lines to the Sample-Draw Detector” on page 8 for instructions to install a new piece of tubing into the fitting. 35-3001-01H-DIL Hydrogen Sample-Draw Detector • 17... -
Page 22: Calibration Frequency
Although there is no particular calibration frequency that is correct for all applications, a calibration frequency of every 3 months is adequate for most sample draw detector applications. Unless experience in a particular application dictates otherwise, RKI Instruments, Inc. recommends a calibration frequency of every 3 months. -
Page 23: Setting The Response Reading
Wait approximately one minute to allow the hydrogen reading to stabilize. Follow the instructions in the controller’s operator’s manual to exit the calibration mode. Store the components of the calibration kit in a safe and convenient place. 35-3001-01H-DIL Hydrogen Sample-Draw Detector • 19... -
Page 24: Parts List
Regulator with gauge and knob, 6 LPM, for 34 liter aluminum cylinder, 58 liter, and 103 liter cylinders (cylinders with internal threads) 81-1127RK Gas bag with fittings and hosebarb, 12 inches x 12 inches, 5 liters, tedlar 20 • 35-3001-01H-DIL Hydrogen Sample-Draw Detector...
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