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RKI Instruments 35-3001A-08-03 Operator's Manual

Methane/carbon monoxide sample-draw detector
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35-3001A-08-03
Methane/Carbon Monoxide
Sample-Draw Detector
Operator's Manual
Part Number: 71-0412
Revision: 0
Released: 8/8/17
www.rkiinstruments.com

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Summary of Contents for RKI Instruments 35-3001A-08-03

  • Page 1 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector Operator’s Manual Part Number: 71-0412 Revision: 0 Released: 8/8/17 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. 35-3001A-08-03 Methane/Carbon Monoxide 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.

  • Page 4: Table Of Contents

    Parts List ..............26 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector...

  • Page 5: Overview

    WARNING: When using the 35-3001A-08-03, you must follow the instructions and warnings in this manual to assure proper and safe operation of the 35-3001A-08-03 and to minimize the risk of personal injury. Be sure to maintain and periodically calibrate the 35-3001A-08-03 as described in this manual.

  • Page 6: Description

    LEL / IR AMP 1 AMP 2 Interconnect Terminal This End To Strip Inlet Fitting 3/4" Conduit Hub Particle F ilter INLET Inlet Fitting EXHAUST Exhaust Fitting Figure 1: Methane/Carbon Monoxide Sample-Draw Detector Component Location 2 • 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector...

  • Page 7: External Components

    Pressure Switch Flowmeter Exhaust Carbon Flowmeter PCB Monoxide Restrictor Sensor Sensor Flow Control Valve Inlet Charcoal Filter IR CH4 Sensor Pump Particle Filter Hydrophobic Filter Figure 2: Methane/Carbon Monoxide Sample-Draw Detector Flow Diagram 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector • 3...
  • Page 8 A ball in the flowmeter column indicates the flow rate to the sensor. The flowmeter measures the flow in the range 0.2 to 2.0 SCFH (Standard Cubic Feet per Hour). The optimum flow rate is 1.0 SCFH. 4 • 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector...
  • Page 9 4-wire cable mates to the IR CH sensor and retains it in the flow block. The cable is wired to the IR CH amplifier. The IR CH sensor PCB allows you to replace the sensor without disconnecting the wiring. 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector • 5...
  • Page 10 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. 6 • 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector...
  • Page 11 The black test point (CAL 2) in the upper left corner is the negative (-) test point and the red test point (CAL 1) in the upper right corner is the positive (+) test point. 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector • 7...

  • Page 12: Installation

    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 8 • 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector...

  • Page 13: 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 14: 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 15 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-08-03 for detector/terminal strip connections specific to the controller.

  • Page 16: Start Up

    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.” 12 • 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector...

  • Page 17: Setting The Zero Reading

    Verify a display reading of 0 %vol for the methane channel and 0 ppm for the carbon monoxide channel at the controller. Investigate significant changes in the display reading. 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector • 13...
  • Page 18 “Calibration, IR CH Sensor” on page 22. Unscrew the methane cylinder from the demand flow regulator. Remove the voltmeter leads from the IR CH amplifier. 14 • 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector...

  • Page 19: Troubleshooting

    Probable causes • The sample-draw detector’s flow rate is too low because of an obstructed sample line, failed pump, etc. • The sample-draw detector is malfunctioning. • The sensor wiring is disconnected or misconnected. 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector • 15...

  • Page 20: Replacing Components Of The Sample-Draw Detector

    If the fail condition continues, replace the sensor(s) as described in “Replacing Components of the Sample-Draw Detector” on page 16. If the fail condition continues, contact RKI Instruments, Inc. for further instruction. Slow or No Response/Difficult or Unable to Calibrate Symptoms •...
  • Page 21 Amplifier Controller Detector/Amp Terminal Terminal Strip Strip on Main PCB PWR/SIG “-” PWR/SIG “S” PWR/SIG “+” Table 3:Reconnecting the IR Methane Sensor to the Amplifier Amplifier Detector Detector Lead Terminal Strip DETECTOR “R” 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector • 17...
  • Page 22 Unscrew the two screws in the upper right and lower left corners of the CO flow block then lift the CO amplifier and sensor off of the flow block. 18 • 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector...
  • Page 23 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. Turn on power to the controller. Turn on the controller. 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector • 19...

  • Page 24: Adjusting The Low Flow Setting

    If the low flow alarm is set too high, turn the pressure switch adjustment screw slightly clockwise. Repeat steps 3 and 4 if necessary. Use the sensor flow control valve to set the flow to 1.0 SCFH. Make sure the sample-draw detector’s Fail LED is off. 20 • 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector...

  • Page 25: 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 9 for instructions to install a new piece of tubing into the fitting. 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector • 21...

  • Page 26: Calibration Frequency

    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 for the CO detector and every 6 months for the infrared detector.

  • Page 27: Setting The Zero Reading

    Remove the voltmeter leads from the amplifier test points. Close the housing door. 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. 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector • 23...

  • Page 28: Calibration, Co Sensor

    5. If you verified a fresh air environment, proceed to the next section, Setting the Response Reading. Disconnect the sample tubing from the inlet fitting. Unscrew the regulator from the zero air calibration cylinder. 24 • 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector...

  • Page 29: Setting The Response Reading

    Remove the voltmeter leads from the amplifier test points. Close the housing door. 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. 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector • 25...

  • Page 30: Parts List

    Regulator, demand flow, for 34 liter aluminum, 58 liter, and 103 liter calibration cylinders (cylinders with internal threads) 81-1055RK Regulator, demand flow, for 17 liter and 34 liter steel calibration cylinders (cylinders with external threads) ES-1531-CO Carbon monoxide sensor 26 • 35-3001A-08-03 Methane/Carbon Monoxide Sample-Draw Detector...

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