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Summary of Contents for RKI Instruments 35-3010RKA-04H
- Page 1 35-3010RKA-04H Sample-Draw Detector Head Operator’s Manual Part Number: 71-0605 Revision: P1 Released: 8/16/22 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. 2 • 35-3010RKA-04H Sample-Draw Detector Head Operator’s Manual...
- 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.
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Page 4: Table Of Contents
Setting the Response Reading..........27 4 • 35-3010RKA-04H Sample-Draw Detector Head Operator’s Manual... - Page 5 Parts List ............30 35-3010RKA-04H Sample-Draw Detector Head Operator’s Manual • 5...
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Page 6: Overview
WARNING: When using the 35-3010RKA-04H, you must follow the instructions and warnings in this manual to assure proper and safe operation of the 35-3010RKA-04H and to minimize the risk of personal injury. Be sure to maintain and periodically calibrate the 35-3010RKA-04H as described in this manual. -
Page 7: Description
Description This section describes the components of the 35-3010RKA-04H sample-draw detector. The sample-draw detector consists of the housing, flow system, and detection system. LEL T ransm itter Charcoal F ilter Main Circuit Board Hydrophobic Oxygen Transm itter Filter (AcroPak) B A T T... -
Page 8: Flow System
EXHAUST fitting (see Figure 1). Figure 2 illustrates how the gas sample moves through the flow system. Bypass Valve Exhaust Pressure Switch Flow meter Flow Block Charcoal Filter Oxygen Hydrophobic Inlet Pump Filter Figure 2: Sample-Draw Detector Flow Diagram 8 • Description 35-3010RKA-04H Sample-Draw Detector Head... - Page 9 (see Figure 5). Status Lights Two status lights are above the flowmeter. Pilot Light The green Pilot light is on when the sample-draw detector is receiving power. 35-3010RKA-04H Sample-Draw Detector Head Description • 9...
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Page 10: Detection System
The porous flame arrestor allows the gas sample to enter the sensor assembly and contact the sensing element. The flame arrestor also contains sparks within the sensor.The sensor has a built- in molecular sieve that only allows hydrogen to diffuse into the detector. 10 • Description 35-3010RKA-04H Sample-Draw Detector Head... - Page 11 Hydrogen Sulfide Gas Sensor The hydrogen sulfide gas sensor position is located in the upper right side of the flow block. In the 35-3010RKA-04H, the hydrogen sulfide gas sensor position in the flow block is occupied by a dummy sensor.
- Page 12 The test points are located on the left side of the transmitter and are labeled TP+ and TP-. A 100 mV - 500 mV output is available at these test points for use during calibration. 12 • Description 35-3010RKA-04H Sample-Draw Detector Head...
- Page 13 The test points are located on the top of the transmitter on either side of the transmitter interconnect terminal strip. They are labeled TP+ and TP-. A 100 mV - 500 mV output is available at these test points for use during calibration. 35-3010RKA-04H Sample-Draw Detector Head Description • 13...
- Page 14 CO sensor signal and the one of the right is for the H S sensor signal. Since both the CO and H S sensors are replaced with a dummy plug in the 35-3010RKA-04H the CO and H sensor signal cables carry no signal in this version of the 35-3010RK. Main Circuit Board...
- Page 15 NOTE: There is no flow fail indication for the hydrogen and oxygen channels on the 35-3010RKA-04H Sample Draw Adapter. Reset Switch A small reset button is located in the upper left corner of the main PCB. When a low flow condition occurs, the pump will be shut off.
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Page 16: Installation
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 one of the mounting feet to the housing, then rotate the mounting foot 180 degrees. 16 • Installation 35-3010RKA-04H Sample-Draw Detector Head... -
Page 17: Connecting The Sample Lines To The Sample-Draw Detector
5. Connect the cable to the sample-draw detector’s interconnect terminal strip as shown in Figure 7. 35-3010RKA-04H Sample-Draw Detector Head Installation • 17... - Page 18 Sample Draw Housing Main Circuit Board Reset Switch Interconnect Terminal Strip Oxygen 4/20 (Feedback) 24 VDC (Controller Transmitter (Controller Trasnmitter 24 VDC Terminals) 4/20 (Feedback) Terminals) Figure 7: External (Field) Wiring, Sample-Draw Detector 18 • Installation 35-3010RKA-04H Sample-Draw Detector Head...
- Page 19 SPAN Z ERO TOXIC Green Black White Green White Pump Pressure Switch Factory Factory Wired Wired LEL Sensor Connector Detector Oxygen Sensor (Not (Not Used) Used) Figure 8: Internal (Factory) Wiring, Sample-Draw Detector 35-3010RKA-04H Sample-Draw Detector Head Installation • 19...
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Page 20: Start Up
1. Verify that the sample-draw detector is sampling a fresh air environment (environment known to be free of hydrogen and of normal oxygen content, 20.9%). 2. Open the housing door. 3. Set a voltmeter to measure in the millivolt (mV) range. 20 • Start Up 35-3010RKA-04H Sample-Draw Detector Head... -
Page 21: Operation
Fail LED. If the condition continues, find the cause of the reduced flow, correct it, and restart the pump with the pump reset switch. A flow reduction can be caused by a flow blockage, a leak in the flow system, a malfunctioning pressure switch, or a malfunctioning pump. 35-3010RKA-04H Sample-Draw Detector Head Operation • 21... -
Page 22: Maintenance
• 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 or transmitter wiring is disconnected or misconnected. 22 • Maintenance 35-3010RKA-04H Sample-Draw Detector Head... - Page 23 5. If the fail condition continues, replace the sensor from the problem channel or channels as described later in this section. 6. If the fail condition continues, contact RKI Instruments, Inc. for further instruction. Slow or No Response/Difficult or Unable to Calibrate Symptoms •...
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Page 24: Replacing Components Of The Sample-Draw Detector
2. Locate the hydrophobic filter. It is just to the left of the main circuit board. 3. Grasp the hydrophobic filter and pull it out of its metal clamp. 4. Remove the rubber seals from each end of the hydrophobic filter and remove the filter. 24 • Maintenance 35-3010RKA-04H Sample-Draw Detector Head... -
Page 25: Adjusting The Low Flow Setting
6. Place the new hydrophobic filter back into the metal clamp. Replacing the Charcoal Filter NOTE: The charcoal filter does not normally need to be replaced in the 35-3010RKA-04H because it does not include a CO sensor. 1. Turn off or unplug power to the controller. -
Page 26: 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 for the sample draw detector. -
Page 27: Setting The Zero Reading
2. Reconnect the incoming sample line. 3. Wait 1 to 2 minutes to allow the calibration gas to be drawn out and the reading to stabilize. 4. Close the housing door. 35-3010RKA-04H Sample-Draw Detector Head Calibration, Hydrogen Detector • 27... -
Page 28: Calibration, Oxygen Detector
6. Disconnect the sample tubing from the inlet line. 7. Unscrew the regulator from the nitrogen calibration cylinder. 8. For convenience, leave the regulator attached to the sample tubing. 28 • Calibration, Oxygen Detector 35-3010RKA-04H Sample-Draw Detector Head... -
Page 29: Setting The Zero Reading
2. Wait 1 to 2 minutes to allow the calibration gas to be drawn out and the reading to stabilize. 3. Close the housing door. 4. Store the components of the calibration kit in a safe and convenient place. 35-3010RKA-04H Sample-Draw Detector Head Calibration, Oxygen Detector • 29... -
Page 30: Parts List
Regulator, demand flow, for 34 liter, 58 liter, and 103 liter aluminum calibration cylinders (cylinders with internal threads) 81-1055RK Regulator, demand flow, for 17 and 34 liter steel cylinders (cylinders with external threads) 30 • Parts List 35-3010RKA-04H Sample-Draw Detector Head...
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