35-3001-09 Oxygen/Hydrogen Sulfide Sample-Draw Detector Operator’s Manual Part Number: 71-0330 Revision: P2 Released: 9/17/14 www.rkiinstruments.
WARNING Read and understand this instruction manual before operating detector. Improper use of the detector could result in bodily harm 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.
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.
Table of Contents Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 External Components. . . . . . . . . . . . . . . .
Overview This operator’s manual describes the 35-3001-09 oxygen/hydrogen sulfide sample-draw detector. This manual also describes how to install, start up, maintain, and calibrate the sample-draw detector when using it with a gas monitoring controller. A parts list at the end of this manual lists replacement parts and accessories for the sample-draw detector. Specifications Table 1 lists specifications for the oxygen/hydrogen sulfide sample-draw detector.
Description This section describes the components of the oxygen/hydrogen sulfide sample-draw detector.
installation where general purpose equipment is in use. The housing door is hinged on the left side and is secured by two latches on the right side. The flowmeter and status LEDs are visible through a window in the housing door. Four mounting feet are attached to the back of the housing (one at each corner). Use the mounting feet to install the housing to a vertical surface. Sample Fittings The sample fittings are located on the left side of the bottom of the housing.
Detector/Amp Terminal Strip The detector/amp terminal strip is the upper twelve-point terminal strip in the bottom right corner of the main circuit board. Use the detector/amp terminal strip to connect the hydrogen sulfide sensor to the main circuit board. NOTE: The hydrogen sulfide sensor is factory-wired to the main circuit board. See the “Installation” section on page 7 for all wiring procedures related to the sample-draw detector.
Sensor Flow Control Valve 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 detector. Turn the valve’s knob clockwise to increase the flow and counterclockwise to decrease the flow. Status LEDs Two status LEDs are above the flowmeter. They are also visible through the window in the housing door. The green Pilot LED is on when the sample-draw detector is receiving power from the controller.
Hydrogen Sulfide Sensor/H2S Amplifier The hydrogen sulfide sensor is a plug-in sensor that plugs into the back of the H2S amplifier. The sensor and amplifier are retained in the flow block by two screws. The flow block is mounted to the middle of the main circuit board. It is the upper of the two flow blocks mounted to the main circuit board.
Installation This section describes procedures to mount the sample-draw detector in the monitoring environment and wire the sample-draw detector to a controller. Mounting the Sample-Draw Detector 1. Select the mounting site. Consider the 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.
2. Close and latch the housing door. NOTE: The sample-draw detector is shipped with the mounting feet “tucked under” the housing to protect the mounting feet during shipment. 3. Slightly loosen the screw that secures the mounting foot to the housing, then rotate the mounting foot 180 degrees (see Figure 4). 4. Tighten the screw that secures the mounting foot to the housing. 5. Repeat steps 3 and 4 for the remaining three mounting feet. 6.
ring, if it came out, in the orientation shown in Figure 5. 4. Screw the inlet fitting tube nut back onto the fitting body. See the next section for instructions to install a new piece of tubing into the fitting. Connecting the Sample Lines to the Sample-Draw Detector See Figure 5 for the fitting layout. Installing the Inlet Line with Particle Filter 1. Connect the particle filter to the tubing stub on the inlet by pushing the flexible tubing on the filter onto the stub.
Installing the Exhaust Line 1. Loosen the nut on the exhaust fitting until 3 threads are visible. 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. See “Specifications” on page 1 for maximum tubing lengths based on tubing size.
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 35-3001-09 for detector/terminal strip connections specific to the 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. Start Up This section describes procedures to start up the sample-draw detector and place the sample-draw detector into normal operation. Introducing Incoming Power 1. Complete the installation procedures described earlier in this manual. 2. Verify that the wiring is correct and secure.
3. Set a voltmeter to measure in the millivolt (mV) range. 4. 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. 5. Verify a voltmeter reading of 100 mV (± 2 mV). 6. If necessary, use a small flat-blade screwdriver to adjust the zero potentiometer until the voltmeter reading is 100 mV (± 2 mV). 7. Remove the voltmeter leads from the H2S amplifier’s test points. 8.
Preparing for the response test NOTE: This procedure describes the RKI calibration kit that includes a demand flow regulator. 1. Verify that the display reading at the controller is 20.9% for the oxygen channel and 0 ppm for the H2S channel. If the display reading is not 20.9% for the oxygen channel or 0 ppm for the H2S channel, set the zero reading as described in “Calibration, Oxygen Sensor” on page 19 or “Calibration, H2S Sensor” on page 20, then continue this procedure. 2.
Quarterly Calibration Calibrate the sample-draw detector as described in “Calibration, Oxygen Sensor” on page 19 and “Calibration, H2S Sensor” on page 20. Troubleshooting The troubleshooting guide describes symptoms, probable causes, and recommended action for problems you may encounter with the sample-draw detector. NOTE: This troubleshooting guide describes sample-draw detector problems only. See the controller Operator’s Manual if the controller exhibits any problems.
Recommended action 1. Verify that the calibration cylinder contains an adequate supply of a fresh test sample. 2. If a demand flow regulator calibration kit is used, use a different demand flow regulator to determine if the original one is functioning properly. 3. If necessary, set the correct flow rate with the sensor flow control valve. 4. If you cannot set the correct flow rate, check the sample line for obstructions or kinks. 5.
5. Unplug the sensor from the H2S amplifier. 6. Verify that you are using the correct replacement sensor, then plug the sensor into the H2S amplifier. 7. Place the sensor and amplifier in the H2S sensor cavity. 8. Secure the H2S amplifier on the flow block with the two screws you removed in step 4. 9. Close and latch the housing door. 10. Turn on power to the controller. 11. Turn on the controller. CAUTION: Allow the replacement sensor to warm up for 5 minutes before you continue. 12.
3. 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. 4. Verify that the flow rate is approximately 1.0 SCFH, then close the housing door. Replacing the Particle Filter 1. Disconnect the tubing routed to the sampling area, if installed, from the particle filter. 2. Disconnect the particle filter from the inlet fitting’s tubing stub. 3. Install the new particle filter onto the inlet fitting’s tubing stub.
If an application is very demanding, for example if the environment is not well controlled, then more frequent calibration than every 3 months may be necessary. Calibration, Oxygen Sensor This section describes how to calibrate the oxygen sensor in the sample-draw detector. It includes procedures to prepare for calibration, set the fresh air reading, set the zero reading, and return to normal operation. NOTE: Calibrating the sample draw detector may cause alarms.
Returning to Normal Operation 1. Wait 1 to 2 minutes to allow the oxygen reading at the controller to return to normal, then return the controller to normal operation. NOTE: If you do not allow the oxygen reading to return to normal, then unwanted alarms may occur. 2. Verify that the controller display reading stabilizes at 20.9%. 3. Store the components of the calibration kit in a safe and convenient place.
section, Setting the Response Reading. 5. Disconnect the sample tubing from the inlet line. 6. Unscrew the regulator from the zero air calibration cylinder. Setting the Response Reading 1. Screw the regulator into the hydrogen sulfide 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.
Parts List Table 2 lists replacement parts and accessories for the sample-draw detector. Table 2: Parts List Part Number Description 06-1248RK Sample tubing, 3/16 x 5/16, specify length 06-1248RK-03 Sample tubing, 3/16 in. x 5/16 in.
