RKI Instruments 35-3001A-07 Operator'S Manual Download Page 1

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35-3001A-07

Combustible Gas/Hydrogen Sulfide

Sample-Draw Detector

Operator’s Manual

Part Number: 71-0431

Revision: 0

Released: 8/7/17

Summary of Contents for 35-3001A-07

Page 1: ...www rkiinstruments com 35 3001A 07 Combustible Gas Hydrogen Sulfide Sample Draw Detector Operator s Manual Part Number 71 0431 Revision 0 Released 8 7 17 ...

Page 2: ... or death Periodic calibration and maintenance of the detector is essential for proper operation and correct readings Please calibrate and maintain this detector regularly Frequency of calibration depends upon the type of use you have and the sensor types Typical calibration frequencies for most applications are between 3 and 6 months but can be required more often or less often based on your usag...

Page 3: ...removal or replacement costs local repair costs transportation costs or contingent expenses incurred without our prior approval THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER WARRANTIES AND REPRESENTATIONS EXPRESSED OR IMPLIED AND ALL OTHER OBLIGATIONS OR LIABILITIES ON THE PART OF RKI INSTRUMENTS INC INCLUDING BUT NOT LIMITED TO THE WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR...

Page 4: ...12 Setting the Zero Reading 12 Maintenance 13 Preventive Maintenance 13 Troubleshooting 15 Replacing Components of the Sample Draw Detector 16 Adjusting the Low Flow Setting 19 Removing the Particle Filter s Tubing Stub if Necessary 20 Calibration Frequency 21 Calibration LEL Sensor 21 Preparing for Calibration 21 Setting the Zero Reading 22 Setting the Response Reading 22 Returning to Normal Oper...

Page 5: ...ersonal injury Be sure to maintain and periodically calibrate the 35 3001A 07 as described in this manual Table 1 Specifications Target Gases and Detection Range Combustible Gas 0 100 LEL Hydrogen Sulfide 0 100 ppm Input Power 24 VDC Nominal 18 5 VDC 30 VDC Construction housing Fiberglass polyester NEMA 4X Dimensions 8 5 in H x 6 5 in W x 4 25 in D Weight 4 5 lbs Sampling Method Sample draw Sample...

Page 6: ...N S P W R SIG Flow Baffle LEL F low Block LEL Sensor H2S Flow Block S e n s o r C u rr e n t 1 4 8 m A Sensor F low Control Valv e Pilot LED Fail LED Flowmeter Pum p R eset Switch S G B AMP 1 AMP 2 W G OXY S R AMP OXY AMP 2 Hydrophobic Filter This End T o Inlet F itting Particle Filter Oxygen Sensor Terminal Strip Interconnect Terminal Strip LEL I R Flowmeter Circuit Board Connector H2S Amplifier ...

Page 7: ...ept 1 4 in rigid tubing See the Installation section on page 8 to connect tubing to the sample fittings Particle Filter A particle filter with a tubing stub on one end is shipped with the instrument but it is not factory installed If the particle filter is installed directly to the inlet fitting the tubing stub must be used If the particle filter is installed somewhere else like at the end of the ...

Page 8: ...on of the sample draw detector Pump Connector The pump connector is the two point connector below the oxygen terminal strip in the upper right corner of the main circuit board Use the pump connector to connect the pump to the main circuit board NOTE The pump is factory wired to the main circuit board See Installation on page 8 for all wiring procedures related to the sample draw detector Flowmeter...

Page 9: ...er The hydrophobic filter is located toward the bottom left of the main circuit board The filter prevents particulates and water in the incoming gas sample from damaging the flow and detection systems Replace the filter when it appears dirty discolored or clogged Pump 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 pum...

Page 10: ...s adjustment screw and adjust the amplifier s gas response output during the calibration procedure Turn the adjustment screw clockwise to increase the span output and counterclockwise to decrease the span output CAUTION The amplifier includes additional pots They are factory set Do not adjust them Controller and Detector Terminal Strips The controller terminal strip and detector terminal strip are...

Page 11: ... pot s adjustment screw and adjust the amplifier s zero output during the start up and calibration procedures Turn the adjustment screw clockwise to increase the zero output and counterclockwise to decrease the zero output Span Pot The span pot is located to the left of the zero pot see Figure 4 Use a small flat blade screwdriver to turn the span pot s adjustment screw and adjust the amplifier s g...

Page 12: ...he following when you select the mounting site Is there enough room to open the housing door and make wiring and tubing connections at the bottom of the housing Make sure there is sufficient room to perform start up maintenance and calibration procedures Are the flowmeter and status LEDs visible Figure 5 Outline and Mounting Dimensions Ø 30 x 50 4X MOUNTING 78 1 13 40 Pilot Fail 85 80 4 50 NOTE Ho...

Page 13: ...f the fitting components 4 Connect a length of sample tubing to the other side of the particle filter and route it to the sampling area 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 bas...

Page 14: ...appropriate insert to seal the connection between the tubing and the inlet fitting 3 Hand tighten the nut on the exhaust fitting so the ferrules clamp on the tubing If the tube nut is removed see Figure 7 for the arrangement of the fitting components 4 Route the opposite end of the tubing to an open area where the sample can safely disperse or to an exhaust duct See Specifications on page 1 for ma...

Page 15: ...e Sample Draw Detector to a Controller 9 If shielded cable is used connect the cable s drain wire to an available chassis earth ground at the controller RKI controllers typically have a ground stud that can be used to ground the cable s drain wire Black W hite Red Not U sed on This Version ZERO SP AN Red Blue S S P WR SIG Green Black Red LEL IR LEL IR AMP 2 AMP 1 AMP 1 AMP 2 P A T S 2 0 1 P A T S ...

Page 16: ... line press and hold the reset switch and plug the open end of the sample line with your thumb If the flowmeter ball drops to the bottom of the flowmeter the incoming sample line is not leaking 8 Remove your thumb from the sample line release the reset switch and verify the flowmeter returns to a normal flow rate 9 Enable alarms or place the controller in normal operation CAUTION Allow the sample ...

Page 17: ...ockwise to decrease the flow 3 Verify a display reading of 0 LEL for the combustible gas channel and 0 ppm for the hydrogen sulfide channel at the controller Investigate significant changes in the display reading Monthly Response Test This procedure describes a test to verify that the sample draw detector responds properly to the target gas NOTE To reduce the response time of this test use a short...

Page 18: ... demand flow regulator 5 Remove the voltmeter leads from the LEL amplifier 6 Plug the voltmeter leads into the test points on the H2S amplifier Plug the positive lead into the red test point plug the negative lead into the black test point 7 Use the following formula to determine the correct test points output for the test sample Output mV calibrating sample fullscale X 400 100 For example with a ...

Page 19: ... control valve 2 If you cannot set the correct flow rate check the sample lines for obstructions or kinks 3 Verify that the sensor wiring is correct and secure Wiring the Sample Draw Detector to a Controller on page 10 describes sensor wiring connections 4 Calibrate the sample draw detector as described in Calibration LEL Sensor on page 21 and Calibration H2S Sensor on page 23 5 If the fail condit...

Page 20: ...ews that secure the sensor retaining plate then lift the plate connector and sensor out of the housing 5 Unplug the connector from the sensor 6 Verify that you are using the correct replacement sensor NC 6245 is printed on the sensor then plug the sensor into the connector 7 Place the sensor in the combustible gas sensor cavity then position the retaining plate on the two standoffs 8 Secure the re...

Page 21: ...ration 12 Allow the sample draw detector to warmup for 5 minutes 13 Calibrate the LEL sensor as described in Calibration LEL Sensor on page 21 Replacing the H2S Sensor 1 Turn off the controller 2 Turn off power to the controller 3 Open the housing door of the sample draw detector 4 Unscrew the two screws in the upper right and lower left corners of the H2S flow block then lift the H2S amplifier an...

Page 22: ... H2S amplifier 8 Place the sensor and amplifier in the H2S sensor cavity 9 Secure the H2S amplifier on the flow block with the two screws you removed in step 5 10 Reconnect the wires coming from the H2S amplifier to the AMP 2 position on the detector amp terminal strip Connect the red wire to the terminal Connect the blue wire to the S terminal NOTE When the sample draw detector is first powered u...

Page 23: ... its calibration program or disable external alarms before performing this test The factory set low flow setting is 0 6 SCFH 0 1 To adjust the low flow setting 1 Use the sensor flow control valve to set the flow to 0 6 SCFH Turn the valve s knob clockwise to increase the flow and counterclockwise to decrease the flow If the sample draw detector goes into low flow alarm before you can adjust the fl...

Page 24: ...stub should come out with the tube nut Be careful not to lose the O ring that may come out with the tubing stub If you do lose the O ring or if it is damaged see Parts List on page 25 for the spare part number 3 Push the tubing stub up and out of the front ferrule being careful not to lose the ferrule set If you do lose the ferrule set or if it is damaged see Parts List on page 25 for the spare pa...

Page 25: ...ero reading set the response reading and return to normal operation The standard calibration gas for the sample draw detector is methane The sample draw detector may be calibrated to other combustible gases such as hexane or hydrogen Use the correct calibration gas for your installation NOTE This procedure describes calibration using a demand flow regulator Preparing for Calibration 1 Follow the i...

Page 26: ...on cylinder Setting the Response Reading 1 Screw the regulator into the combustible gas calibration cylinder 2 Connect the sample tubing from the demand flow regulator to the sample draw detector s inlet line 3 Allow the sample draw detector to draw sample for one minute 4 When the reading on the voltmeter stabilizes verify that the reading matches the response reading 2 mV you determined earlier ...

Page 27: ...e test points on the H2S amplifier Plug the positive lead into the red amplifier test point plug the negative lead into the black amplifier test point 6 Use the following formula to determine the correct test points output for the test sample Output mV calibrating sample fullscale X 400 100 For example with a test sample of 25 ppm and a fullscale setting of 100 ppm the correct output is 200 mV 200...

Page 28: ...ry use the span potentiometer on the amplifier to adjust the reading to match the correct response reading 6 Disconnect the sample tubing from the sample draw detector s inlet fitting 7 Reconnect the incoming sample line to the inlet fitting 8 Unscrew the regulator from the calibration cylinder Returning to Normal Operation 1 Wait approximately one minute to allow the hydrogen sulfide reading to s...

Page 29: ...nder 50 LEL hydrogen in air 34 liter steel 81 0002RK 03 Calibration cylinder 50 LEL hydrogen in air 103 liter 81 0007RK 01 Calibration cylinder 50 LEL hexane in air 34 liter steel 81 0012RK 01 Calibration cylinder 50 LEL methane in air 34 liter steel 81 0012RK 03 Calibration cylinder 50 LEL methane in air 103 liter 81 0076RK 01 Zero air calibration cylinder 34 liter steel 81 0076RK 03 Zero air cal...

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