Related Manuals for RKI Instruments 35-3001A-15HDIL
Summary of Contents for RKI Instruments 35-3001A-15HDIL
- Page 1 35-3001A-15HDIL Hydrogen/Oxygen Detector Operator’s Manual Part Number: 71-0697 Revision: P1 Released: 3/12/25 RKI Instruments, Inc. www.rkiinstruments.com...
- Page 2 For most applications, typical calibration frequencies are between 3 and 6 months but can be more often or less often based on your usage. 35-3001A-15HDIL Hydrogen/Oxygen Detector Operator’s Manual • 2...
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Page 3: Product Warranty
We do not assume indemnification for any accident or damage caused by the operation of this gas monitor and our warranty is limited to the replacement of parts or our complete goods. Warranty covers parts and labor performed at RKI Instruments, Inc. only, and does not cover field labor or shipment of parts back to RKI. -
Page 4: Table Of Contents
Setting the Zero Reading ........... . 35 35-3001A-15HDIL Hydrogen/Oxygen Detector Operator’s Manual • 4... - Page 5 Parts List ............37 35-3001A-15HDIL Hydrogen/Oxygen Detector Operator’s Manual • 5...
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Page 6: Overview
About the 35-3001A-15HDIL The 35-3001A-15HDIL is designed to monitor hydrogen and oxygen in an inert 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 7 Accuracy • Oxygen: ± 0.5% O WARNING: When using the 35-3001A-15HDIL, you must follow the instructions and warnings in this manual to assure proper and safe operation of the 35-3001A- 15HDIL and to minimize the risk of personal injury. Be sure to maintain and periodically calibrate the 35-3001A-15HDIL as described in this manual.
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Page 8: Description
PWR / SIG PWR / SIG Interconnect Terminal Strip This End To Hydrogen Inlet Fitting 3/4" Conduit Hub Amplifier Particle Filter INLET Inlet Fitting EXHAUST Exhaust Fitting Figure 1: Hydrogen/Oxygen Sample-Draw Detector Component Location 8 • Description 35-3001A-15HDIL Hydrogen/Oxygen Detector... -
Page 9: External Components
Conduit Hub One 3/4” conduit hub is located on the right side of the bottom of the housing. It is used for routing wiring into the housing by using conduit or an appropriate cable bushing. 35-3001A-15HDIL Hydrogen/Oxygen Detector Description • 9... -
Page 10: Internal Components
The interconnect terminal strip is the lower twelve-point terminal strip in the bottom right corner of the main circuit board. Use the interconnect terminal strip to connect the sample- draw detector to a controller. 10 • Description 35-3001A-15HDIL Hydrogen/Oxygen Detector... -
Page 11: Flowmeter Circuit Board
The sensor flow control valve is mounted to the flowmeter circuit board above the flowmeter. The sensor flow control valve adjusts the flow rate to the detectors. Turn the valve’s knob clockwise to increase the flow and counterclockwise to decrease the flow. 35-3001A-15HDIL Hydrogen/Oxygen Detector Description • 11... - Page 12 The reaction of gas with oxygen on the catalyst causes a change in the resistance of the element which changes the current flowing through it. The current is proportional to the detection range of the sample-draw detector. 12 • Description 35-3001A-15HDIL Hydrogen/Oxygen Detector...
- Page 13 This drive current is factory set and is dictated by the combustible gas to which the detector is calibrated. Consult RKI Instruments, Inc. if you plan to change the calibration gas for the sample-draw detector, for example from a hydrogen calibration to a methane calibration.
- Page 14 (oxygen free) output during the calibration procedure. Turn the adjustment screw clockwise to increase the zero output and counterclockwise to decrease the zero output. 14 • Description 35-3001A-15HDIL Hydrogen/Oxygen Detector...
- Page 15 The black test point in the upper left corner is the negative (-) test point and the red test point to the left of the zero and span pots is the positive (+) test point. 35-3001A-15HDIL Hydrogen/Oxygen Detector Description • 15...
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Page 16: Installation
• Are the flowmeter and status LEDs visible? 6.50 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 is 4.3 inches deep Figure 5: Outline and Mounting Dimensions 16 • Installation 35-3001A-15HDIL Hydrogen/Oxygen Detector... -
Page 17: 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 6 for maximum tubing lengths based on tubing size. -
Page 18: Installing The Inlet Line Without The Particle Filter Connected To The Inlet Fitting
2. 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 19: Wiring The Sample-Draw Detector To A Controller
You will connect the opposite end of the drain wire at the controller. 7. Route the cable or wires in conduit leading from the sample-draw detector through one of the conduit hubs at the controller. 35-3001A-15HDIL Hydrogen/Oxygen Detector Installation • 19... - Page 20 8. Connect the wires to the applicable detector/transmitter terminal strip at the controller as shown in Figure 6. Refer to the controller operator’s manual and the controller detector head specification sheet for the 35-3001A-15HDIL for detector/terminal strip connections specific to the controller.
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Page 21: Start Up
9. Enable alarms or place the controller in normal operation. CAUTION: Allow the sample-draw detector to warm up for 5 minutes before you continue with the next section, “Setting the Zero Reading.” 35-3001A-15HDIL Hydrogen/Oxygen Detector Start Up • 21... -
Page 22: Setting The Zero Reading
Setting the Zero Reading Since the 35-3001A-15HDIL monitors an inert 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 23: Quarterly Calibration
6. If the fail condition continues, replace the sensor(s) as described in “Replacing Components of the Sample-Draw Detector” on page 24. 7. If the fail condition continues, contact RKI Instruments, Inc. for further instruction. 35-3001A-15HDIL Hydrogen/Oxygen Detector Maintenance • 23... -
Page 24: Slow Or No Response/Difficult Or Unable To Calibrate
Check the dilution fitting for obstructions. f. If the calibration/response difficulties continue, replace the sensor as described later in this section. g. If the calibration/response difficulties continue, contact RKI Instruments, Inc. for further instruction. Replacing Components of the Sample-Draw Detector This section includes procedures to replace the hydrogen sensor, oxygen sensor, hydrophobic filter, and particle filter. - Page 25 Table 4 and Table 5 below. Table 2: Reconnecting the Amplifier to the Detector/Amp Terminal Strip Amplifier Detector/Amp Controller Terminal Strip on Terminal Strip Main PCB PWR/SIG “-” PWR/SIG “S” PWR/SIG “+” 35-3001A-15HDIL Hydrogen/Oxygen Detector Maintenance • 25...
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Page 26: Replacing The Oxygen Sensor
8. Guide the wires and lugs of the replacement sensor to the oxygen terminal strip and insert each lug into the appropriate terminal. See Figure 6 on page 20 for wiring connections. Tighten the screws on the terminal strip. 9. Close and latch the housing door. 26 • Maintenance 35-3001A-15HDIL Hydrogen/Oxygen Detector... - Page 27 Let the terminal strips hang by their connected wires while you replace the amplifier. 5. Remove the old amplifier from the main circuit board. 6. Install the new amplifier in the same orientation as the old amplifier. See Figure 1. 35-3001A-15HDIL Hydrogen/Oxygen Detector Maintenance • 27...
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Page 28: Replacing The Hydrophobic Filter
4. Disconnect the filter from the rubber elbows on each end of the filter, then remove the filter from the sample-draw detector. 5. Install the new filter. Be sure the side of the filter marked “INLET” is connected to the elbow that is connected to the inlet fitting. 28 • Maintenance 35-3001A-15HDIL Hydrogen/Oxygen Detector... -
Page 29: Replacing The Particle Filter
1. 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 30 If the low flow alarm is set too high, turn the pressure switch adjustment screw slightly clockwise. Repeat steps 3 and 4 if necessary. 6. Remove the flowmeter from the inlet of the instrument. 7. Make sure the sample-draw detector’s Fail LED is off. 30 • Maintenance 35-3001A-15HDIL Hydrogen/Oxygen Detector...
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Page 31: Removing The Particle Filter's Tubing Stub, If Necessary
5. Screw the inlet fitting tube nut back onto the fitting body. See “Connecting the Sample Lines to the Sample-Draw Detector” on page 17 for instructions to install a new piece of tubing into the fitting. 35-3001A-15HDIL Hydrogen/Oxygen Detector Maintenance • 31... -
Page 32: 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 33: Setting The Zero Reading
9. If necessary, use the span potentiometer on the amplifier to adjust the reading to match the correct response reading. 10. Disconnect the gas bag tubing from the inlet line. 11. Empty the gas bag. 35-3001A-15HDIL Hydrogen/Oxygen Detector Calibration, LEL Sensor • 33... -
Page 34: Returning To Normal Operation
1. Attach the gas bag tubing to the regulator on the zero air calibration cylinder. NOTE: A demand flow regulator cannot be used for calibration. 2. Turn the regulator’s on/off knob clockwise to open it. Fill the gas bag. 34 • Calibration, Oxygen Sensor 35-3001A-15HDIL Hydrogen/Oxygen Detector Operator’s Manual... -
Page 35: Setting The Zero Reading
11. Disconnect the gas bag tubing from the sample-draw detector’s inlet fitting. 12. Empty the gas bag. 13. Reconnect the incoming sample line to the inlet line. 14. Unscrew the fixed flow regulator from the calibration cylinder. 35-3001A-15HDIL Hydrogen/Oxygen Detector Calibration, Oxygen Sensor • 35... - Page 36 2. Verify that the controller display reading stabilizes at 20.9%. 3. Remove the voltmeter leads from the amplifier test points. 4. Close the housing door. 5. Store the components of the calibration kit in a safe and convenient place. 36 • Calibration, Oxygen Sensor 35-3001A-15HDIL Hydrogen/Oxygen Detector Operator’s Manual...
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Page 37: Parts List
LEL amplifier (specify gas when ordering) 57-1064RK-11 Oxygen amplifier 61-0155RK Hydrogen sensor, plug-in type, LEL range 71-0697 Operator’s Manual, 35-3001A-15HDIL Sample-Draw Detector 81-0002RK-01 Calibration cylinder, 50% LEL hydrogen in air 34 liter steel 81-0002RK-03 Calibration cylinder, 50% LEL hydrogen in air, 103 liter 81-0076RK-01...
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