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35-3010RK-02 Sample Draw Detector Head For Use
With A Generic Device
Overview
This manual describes the 35-3010RK-02 sample draw detector head. This manual also
describes how to install, start up, maintain, and calibrate the detector head 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 head.
Specifications
Table 1 lists specifications for the 35-3010RK-02.
Target Gases & Detection Ranges
Input Power
Current Draw
Construction (housing)
Dimensions
Weight
Sampling Method
Sample Flow
Response Time
Accuracy
Repeatability
Table 1: Specifications
Combustible Gas, 0 - 100% LEL
Oxygen, 0-25% volume
Hydrogen Sulfide, 0 - 100 ppm
24 VDC
200 mA
Fiberglass/polyester (NEMA 4X)
15.44 in. H x 12.55 in. W x 8.31 in. D
14 lbs.
Sample draw
1.2 SCFH (nominal)
90% in 30 seconds
±5% of detection range
±2% of detection range
35-3010RK-02 Sample-Draw DetectorHead • 1
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Summary of Contents for RKI Instruments 35-3010RK-02
- Page 1 With A Generic Device Overview This manual describes the 35-3010RK-02 sample draw detector head. This manual also describes how to install, start up, maintain, and calibrate the detector head 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 head.
- Page 2 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. Use the two conduit hubs on the bottom of the housing to make wiring connections. 2 • 35-3010RK-02 Sample-Draw Detector Head...
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Page 3: 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. 35-3010RK-02 Sample-Draw Detector Head• 3... - Page 4 4-20 mA line for the H2S 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). NOTE: There is no low flow indication for the LEL and oxygen channels. 4 • 35-3010RK-02 Sample-Draw Detector Head...
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Page 5: Detection System
The cable that extends from the sensor terminates in a socket that plugs into a matching 7-pin male connector. The socket and connector allow you to replace the sensor without disconnecting the wiring. The sensor leads are soldered to the male connector. 35-3010RK-02 Sample-Draw Detector Head• 5... - Page 6 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 35-3010RK-02 the CO sensor signal cable carries no signal in this version of the 35-3010RK.
- Page 7 Use the sensor/transmitter terminal strip to connect sensors or transmitters to the main circuit board. NOTE: The sensors are factory wired to the sensor/transmitter terminal strip. See “Installation” on page 9 for all wiring procedures related to the sample draw detector. 35-3010RK-02 Sample-Draw Detector Head• 7...
- Page 8 (4PDT) relay and is rated for 2 amps at 25 VDC (resistive). If the pressure switch senses a low flow condition, the relay interrupts the signal from all three channels which will cause the display at the controller to indicate a fail condition for each channel. 8 • 35-3010RK-02 Sample-Draw Detector Head...
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Page 9: 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. 35-3010RK-02 Sample-Draw Detector Head• 9... -
Page 10: Connecting The Sample Lines To The Sample Draw Detector
You will connect the opposite end of the drain wire at the device. 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. 10 • 35-3010RK-02 Sample-Draw Detector Head... - Page 11 24V 4-20 GND 24V 4-20 AMP4 AMP1 AMP2 AMP3 White Controller LEL Green Terminals Black 24V - 4-20 24V + Controller Oxygen White (+) Terminals Green (-) Figure 5: External (field) Wiring, Sample Draw Detector 35-3010RK-02 Sample-Draw Detector Head• 11...
- Page 12 4-20 Amp 4 Black Black Green Green White White Detector Connector H2S Sensor Plugs Into (Not Far Side of Preamp Used) Oxygen Circuit Board Sensor Detector Figure 6: Internal (factory) Wiring, Sample Draw Detector 12 • 35-3010RK-02 Sample-Draw Detector Head...
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Page 13: Introducing Incoming Power
Verify a reading of 0% LEL at the controller. If the display reading is 0% LEL, the combustible detector is in normal operation. If the display reading is not 0% LEL, perform a zeroing operation at the controller. See 35-3010RK-02 Sample-Draw Detector Head• 13... - Page 14 If the display reading is not 20.9% oxygen, perform a fresh air adjustment operation at the controller. See the controller instruction manual for directions. Remove the voltmeter from the test points. Close the housing door. 14 • 35-3010RK-02 Sample-Draw Detector Head...
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Page 15: Preventive Maintenance
After approximately one minute, verify that the reading for each channel at the monitoring device stabilizes within ± 10% of the concentration of the test sample. If the reading is not within ± 10% of the test sample, calibrate the sample draw detector 35-3010RK-02 Sample-Draw Detector Head• 15... -
Page 16: Troubleshooting
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 17: Replacing Components Of The Sample Draw Detector
If you cannot set the correct flow rate, check the sample line for obstructions or kinks. If the calibration/response difficulties continue, replace the sensor as described later in this section. If the calibration/response difficulties continue, contact RKI Instruments, Inc., for further instruction. Replacing Components of the Sample Draw Detector This section includes procedures to replace the sensor, filter, and ferrules. -
Page 18: Adjusting The Low Flow Setting
Verify that the low flow alarm is 0.6 SCFH (±0.2). Repeat steps 3 and 4 if necessary. Use the flow adjust potentiometer (VR1) to set the flow to 1.2 SCFH. Make sure the sample draw detector’s Fail light is off. 35-3010RK-02 Sample-Draw Detector Head• 18... -
Page 19: Preparing For Calibration
Disconnect the calibration kit sample tubing from the inlet line. Close the clamp right away. The clamp is attached to the calibration kit sample tubing. Connect the tubing from the gas collection bag to the fixed flow regulator, then open the clamp. 35-3010RK-02 Sample-Draw Detector Head• 19... -
Page 20: Setting The Response Reading
0% oxygen, typically 12.0% oxygen. Allow the sample draw pump to draw out any residual gas in the gas collection bag. Disconnect the sample tubing from the sample draw detector’s inlet line, then close the clamp. 35-3010RK-02 Sample-Draw Detector Head• 20... -
Page 21: Parts List
4-gas calibration gas cylinder, 50% LEL methane/12% oxygen/25 ppm H S/50 ppm CO, 58 liters 81-0076RK-03 Zero air calibration cylinder (103 liter) 81-1005RK Regulator, fixed flow, 6 LPM 81-1126RK Gas collection bag (2 liter) ES-1537-H2S S sensor 35-3010RK-02 Sample-Draw Detector Head• 21...
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