65-2428 Hydrogen Sulfide Detector Operator’s Manual Part Number: 71-0344 Revision: P1 Released: 10/20/14 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 Detector Housing, Housing Cap, & Cap Gasket . . . . . . . .
Overview This manual describes the 65-2428 hydrogen sulfide (H2S) detector. This manual also describes how to install, start up, maintain, and calibrate the detector when it is used with a gas monitoring controller. A parts list at the end of this manual lists replacement parts and accessories for the H2S detector. Specifications WARNING: Do not use this product in a manner not specified in this instruction manual. Table 1 lists specifications for the H2S detector.
Description This section describes the components of the H2S detector. The detector consists of the detector housing body, housing cap, cap gasket, rubber boot, spacer, and the H2S sensor. Detector Housing Body Cap Gasket H2S Plug-in Sensor Spacer Rubber Boot Detector Housing Cap Flame Arrestor Guard Figure 1: H2S Detector Component Location Detector Housing Body, Housing Cap, & Cap Gasket The detector housing body protects the sensing components within the housing.
Installation NOTE: Normally, the H2S detector is shipped already installed in one of the bottom conduit hubs of a controller and factory wired to the controller. If your detector is already installed in a controller, use this section for reference only. This section describes procedures to mount the H2S detector in the monitoring environment and wire the detector to a controller. Mounting the H2S Detector 1.
2. At the monitoring site, mount the detector in one of the following two ways: • Screw the detector’s 3/4” NPT mounting thread into an empty conduit hub on a controller. OR • Screw the detector’s 3/4” NPT mounting thread into an appropriately rated junction box. CAUTION: Mount the H2S detector with the detector facing down (see Figure 2).
. Connect the wires to the applicable controller terminal strip. See the controller operator’s manual and the controller’s detector head specification sheet for the H2S detector. . Controller H2S Detector Terminals (typical terminal designation shown) + S Black Red Figure 3: Wiring the H2S Detector to a Controller 10. If shielded cable is used, connect the cable’s drain wire to an available chassis (earth) ground at the controller.
Start Up This section describes procedures to start up the H2S detector and place the detector into normal operation. Introducing Incoming Power 1. Complete the installation procedures described earlier in this manual. 2. Verify that the power wiring to the controller is correct and secure. Refer to the controller operator’s manual. 3. Turn on or plug in the incoming power at the power source end, then turn on the controller. 4. Verify that the controller is on and operating properly.
Maintenance This section describes maintenance procedures. It includes preventive maintenance, troubleshooting, and component replacement procedures. Preventive Maintenance This section describes a preventive maintenance schedule to ensure the optimum performance of the H2S detector. It includes daily, monthly, and quarterly procedures. Daily Verify a display reading of 0 ppm H2S at the controller. Investigate significant changes in the display reading.
Quarterly Calibrate the H2S detector as described in “Calibration” on page 11. Troubleshooting The troubleshooting guide describes symptoms, probable causes, and recommended action for problems you may encounter with the H2S detector. NOTE: This troubleshooting guide describes detector problems only. See the controller operator’s manual for problems you may encounter with the controller. Fail Condition Symptoms • The controller indicates a fail condition.
Replacing Components of the H2S Detector This section includes a procedure to replace the H2S sensor and one to replace the entire detector assembly. In most cases, it is not necessary to replace the entire detector assembly. Replacing the Sensor CAUTION: The sensor contains electrolyte which is a dilute acid. Do not disassemble the sensor when replacing it with a new one. If sensor electrolyte comes in contact with your skin, wash affected area thoroughly with soap and water. 1. Turn off the controller.
5. Unscrew the detector from the controller conduit hub or junction box hub. 6. Guide the detector leads of the replacement detector through the controller conduit hub or junction box hub then screw the mounting threads of the detector into the hub. 7. If the detector is installed directly on a controller, connect the detector leads to the appropriate detector terminal strip terminals. See the controller operator’s manual and the controller’s detector head specification sheet for the H2S detector.
Calibration This section describes how to calibrate the H2S detector. It includes procedures to prepare for calibration, set the zero reading, set the response reading, and return to normal operation. It describes calibration using a calibration kit that includes a calibration cup, calibration gas, sample tubing, and a fixed flow regulator with an on/off knob. RKI Instruments, Inc. recommends using a 0.5 LPM (liters per minute) fixed flow regulator. Preparing for Calibration 1.
NOTE: If you do not allow the gas reading decrease below the alarm points, then unwanted alarms may occur. 2. Verify that the controller display reading decreases and stabilizes at 0 ppm H2S. 3. Store the components of the calibration kit in a safe and convenient place. Parts List Table 2 lists replacement parts and accessories for the H2S detector.
