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Summary of Contents for RKI Instruments 35-3010A-11
- Page 1 35-3010A-11 Sample-Draw Detector Part Number: 71-0496 Revision: P1 Released: 5/29/19 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. 35-3010A-11 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.
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Page 4: Table Of Contents
Parts List ..............26 35-3010A-11 Sample-Draw Detector... -
Page 5: Overview
Overview This manual describes the 35-3010A-11 sample draw detector. This manual also describes how to install, start up, maintain, and calibrate the sample draw 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 detector. -
Page 6: Description
Use the two conduit hubs on the bottom of the housing to make wiring connections. An aluminum subpanel is mounted to the interior of the housing. The sample draw detector’s internal components are mounted to the subpanel. 6 • 35-3010A-11 Sample-Draw Detector... -
Page 7: Flow System
It prevents water and other liquids from contaminating the flow system. Replace the filter when it appears dirty, discolored, or clogged. If a liquid other than water is drawn into the filter, replace the filter as soon as possible. 35-3010A-11 Sample-Draw Detector • 7... - Page 8 LEL channel and the 4-20 mA signal for H and CO channels. This causes a downscale reading at the monitor on these channels. The low flow level is factory-set at 0.6 SCFH (±0.2 SCFH). 8 • 35-3010A-11 Sample-Draw Detector...
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Page 9: Detection System
The infrared carbon dioxide sensor is installed in the smaller flow block. A small circuit board with a cable mates to it and retains it in the block. The cable is wired to the main PCB. 35-3010A-11 Sample-Draw Detector • 9... - Page 10 CO sensor signal and the one of the right is for the H S sensor signal. Since the CO sensor is replaced with a dummy plug in the 35-3010A-11 the CO sensor signal cable carries no signal in this version of the 35-3010RK.
- Page 11 NOTE: The sensors are factory wired to the sensor/transmitter terminal strip. See “Wiring the Sample Draw Detector” on page 14 for all wiring procedures related to the sample draw detector. 35-3010A-11 Sample-Draw Detector • 11...
- Page 12 Amp 2 is on the right and is for the H S channel. Since there is no CO channel in the 35-3010A-11, Amp 1 is not used. The zero and span pots are used during calibration. Use the span pot to make adjustments to gas response readings and the zero pot to make adjustments to the zero reading.
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Page 13: Installation
Slightly loosen the screw that secures one of the mounting feet to the housing, then rotate the mounting foot 180 degrees (see Figure 4). Tighten the screw that secures the mounting foot to the housing. Repeat steps 3 and 4 for the remaining three mounting feet. 35-3010A-11 Sample-Draw Detector • 13... -
Page 14: Connecting The Sample Lines To The Sample-Draw Detector
Route the cable or wires in conduit leading from the sample draw detector to the controller. Connect the drain wire to an available chassis ground at the controller end. RKI controllers typically have a ground stud that can be used to ground the cable’s drain wire. 14 • 35-3010A-11 Sample-Draw Detector... - Page 15 CO2 Channel (Controller Transmitter 24 VDC + Terminals) 24 VDC - LEL Channel (Controller LEL H2S Channel Terminals) S (4/20 mA) (Controller Transmitter 24 VDC + Terminals) Figure 6: External (Field) Wiring, Sample Draw Detector 35-3010A-11 Sample-Draw Detector • 15...
- Page 16 Blac k G re en W hite LEL S ensor Connector H2S S ensor Plugs Into Used Far Side of Pream p Circuit B oard LEL S ensor Figure 7: Internal (Factory) Wiring, Sample Draw Detector 16 • 35-3010A-11 Sample-Draw Detector...
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Page 17: Start Up
CO2 channel is in normal operation. If the CO reading is not the background concentration, perform a zeroing operation as described in “Setting the Zero Reading” on page 24. 35-3010A-11 Sample-Draw Detector • 17... -
Page 18: Operation
A flow reduction can be caused by a flow blockage, a leak in the flow system, a malfunctioning pressure switch, or a malfunctioning pump. 18 • 35-3010A-11 Sample-Draw Detector... -
Page 19: Maintenance
Recommended Action At the sample draw detector, set the correct flow rate with the bypass valve or flow adjust potentiometer. If you cannot set the correct flow rate, check the sample lines for obstructions or kinks. 35-3010A-11 Sample-Draw Detector • 19... -
Page 20: Replacing Components Of The Sample-Draw Detector
If the fail condition continues, replace the sensor from the problem channel or channels as described later in this section. If the fail condition continues, contact RKI Instruments, Inc. for further instruction. Slow or No Response/Difficult or Unable to Calibrate Symptoms •... - Page 21 Remove the rubber seals from each end of the hydrophobic filter and remove the filter. Place the new hydrophobic filter in the same orientation as the one that was removed. Place the new hydrophobic filter back into the metal clamp. 35-3010A-11 Sample-Draw Detector • 21...
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Page 22: Adjusting The Low Flow Setting
Replacing the Charcoal Filter NOTE: The charcoal filter does not normally need to be replaced in the 35-3010A-11 because it does not include a CO sensor. Turn off or unplug power to the controller. Locate the charcoal filter. It is located along the upper edge of the detector housing. -
Page 23: Calibration, Lel Detector
Set the response reading according to the controller operator’s manual to match the calibration gas concentration. Disconnect the sample tubing from the inlet line. Unscrew the regulator from the calibration cylinder. NOTE: For convenience, leave the regulator connected to the sample tubing. 35-3010A-11 Sample-Draw Detector • 23... -
Page 24: Returning To Normal Operation
4-gas cylinder, or a CO scrubber to zero the CO channel. Connect the calibration kit sample tubing to the regulator. 24 • 35-3010A-11 Sample-Draw Detector... -
Page 25: Setting The Response Reading
14. Unscrew the regulator from the CO calibration cylinder. NOTE: For convenience, leave the regulator connected to the sample tubing. Returning to Normal Operation Remove the voltmeter leads from the test points. Reconnect the incoming sample line. 35-3010A-11 Sample-Draw Detector • 25... -
Page 26: Parts List
Regulator, demand flow, for 34 liter aluminum, 58 liter, and 103 liter cylinders (cylinders with external threads) 81-1055RK Regulator, demand flow, for 17 and 34 liter steel cylinders (cylinders with external threads) ES-1537-H2S S sensor NC-6245 Combustible gas sensor 26 • 35-3010A-11 Sample-Draw Detector...
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