RKI Instruments 35-3010RKA-03 Manual Download Page 6 | Manualshive

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2 • 35-3010RKA-03 Sample-Draw Detector

Description

This section describes the components of the

35-3010RKA-03 sample-draw detector.

The

sample-draw detector consists of the housing, flow system, and detection system.

Figure 1: Sample-Draw Detector Component Location

Housing

The sample-draw detector’s fiberglass housing is weather- and corrosion-resistant. It is
suitable for installation where general purpose equipment is in use. The housing door is
hinged on the left side and is secured by two latches on the right side.

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.

An aluminum subpanel is mounted to the interior of the housing. The sample-draw
detector’s internal components are mounted to the subpanel.

+

2 4V

BAT T

+

OX Y

W

G

F B

4 /2 0

TOX IC

TP

+

ZE RO

OXY

T OXIC

TP

-

BK

RD

S PAN

Hydrophobic

Filter (AcroPak)

Flow
Block

Amp 1

Pump

Preamp
Circuit
Board

H2S Sensor
Dummy Plug

LEL Transmitter

Charcoal Filter

Oxygen Sensor

CO Sensor

Combustible
Sensor

Amp 2

Inlet Fitting For 1/4" OD

Rigid Tubing

3/4 Conduit Hub, 2X

Exhaust Fitting For 1/4"

OD Rigid Tubing

Main Circuit Board

Oxygen Transmitter

Reset Switch

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Summary of Contents for 35-3010RKA-03

Page 1: ...rkiinstruments com 35 3010RKA 03 Sample Draw Detector Head Part Number 71 0134RK Revision E Released 6 5 17 ...

Page 2: ...dic 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 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 ...

Page 3: ...cement costs local repair costs transportation costs or contingent expenses incurred without our prior approval THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER WARRANTIES AND REPRESENTATIONS EXPRESSED OR IMPLIED AND ALL OTHER OBLIGATIONS OR LIABILITIES ON THE PART OF RKI INSTRUMENTS INC INCLUDING BUT NOT LIMITED TO THE WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE IN NO E...

Page 4: ...ance 15 Preventive Maintenance 15 Troubleshooting 16 Replacing Components of the Sample Draw Detector 18 Adjusting the Low Flow Setting 19 Calibration Frequency 19 Calibration LEL Detector 20 Preparing for Calibration 20 Setting the Zero Reading 20 Setting the Response Reading 21 Returning to Normal Operation 21 Calibration Oxygen Detector 21 Preparing for Calibration 21 Setting the Zero Reading 2...

Page 5: ...f the 35 3010RKA 03 and to minimize the risk of personal injury Be sure to maintain and periodically calibrate the 35 3010RKA 03 as described in this manual Table 1 Specifications Target Gases Detection Ranges Combustible Gas 0 100 LEL Oxygen 0 25 volume Carbon Monoxide CO 0 300 ppm Input Power 24 VDC Current Draw 275 mA Output Signals 4 20 mA each channel Construction housing Fiberglass polyester...

Page 6: ...re 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 An aluminum subpanel is mounted to the interior of the housing The sample draw detector s internal components are mounted to the subpanel 24V BAT T OXY W G F B 4 2 0 TOXI C T P ZE RO OXY T OXI C...

Page 7: ...e to enter the sample draw detector The INLET fitting accepts 1 4 in rigid tubing See Installation on page 10 for instructions to connect tubing to the INLET fitting Hydrophobic Filter The hydrophobic filter is to the left of the main circuit board It is held in place by a metal clip It prevents water and other liquids from contaminating the flow system Replace the filter when it appears dirty dis...

Page 8: ... a flow of 0 6 SCFH the optimum flow rate is 1 2 SCFH Bypass Valve The bypass valve is to the left of the flowmeter The bypass valve adjusts the flow rate to the sensors Use a flat blade screwdriver to adjust the bypass valve NOTE The bypass valve allows fine adjustments of the flow rate For a wider range of adjustment use the flow adjust potentiometer see Figure 4 Status Lights Two status lights ...

Page 9: ... allows the gas sample to enter the sensor assembly and contact the sensing element The flame arrestor also contains sparks within the sensor Connector The top of the sensor includes five pins that plug into the socket connector This connector allows you to replace the sensor without disconnecting the wiring The sensor leads are soldered to the connector Sensor Leads Four color coded leads extend ...

Page 10: ...pots are located at the bottom edge of the transmitter and are used for calibration Use the span pot to make adjustments to gas response readings and the zero pot to make adjustments to the zero reading Transmitter Interconnect Terminal Strip The transmitter interconnect terminal strip is the seven point terminal strip near the right edge of the transmitter The transmitter is factory wired to the ...

Page 11: ...terconnect Terminal Strip The interconnect terminal strip is the four point terminal strip near the top edge of the transmitter It is factory wired to the main circuit board Span Zero Pots The span and zero pots are located on the left side of the transmitter and are used for calibration Use the span pot to make adjustments to gas response readings and the zero pot to make adjustments to the zero ...

Page 12: ...o power and an external device Sensor Transmitter Terminal Strip The sensor transmitter terminal strip is the sixteen point terminal strip near the right edge of the circuit board Use the transmitter terminal strip to connect sensors or transmitters to the main circuit board NOTE The sensors and transmitters are factory wired to the sensor transmitter terminal strip See Wiring the Sample Draw Dete...

Page 13: ... board Use the pump terminal strip to connect the pump and pressure switch to the main circuit board NOTE The pump and pressure switch are factory wired to the circuit board See Wiring the Sample Draw Detector on page 11 for all wiring procedures related to the sample draw detector Relay The relay is approximately in the middle of the circuit board The relay is a four pole double throw 4PDT relay ...

Page 14: ...connections at the right of the housing Make sure there is sufficient room to perform start up maintenance and calibration procedures Figure 5 Mounting the Sample Draw Detector 2 Close and latch the housing door 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 mo...

Page 15: ...ly disperse Wiring the Sample Draw Detector WARNING Always verify that the power source is OFF before you make wiring connections 1 Turn off the controller 2 Turn off or unplug incoming power to the controller 3 Unlatch and open the housing door of the sample draw detector 4 Guide a eight conductor 18 gauge shielded cable or eight 18 gauge wires in conduit through one of the conduit hubs at the bo...

Page 16: ...ing Sample Draw Detector LEL Controller Transmitter Terminals 4 20 Feedback 24 VDC Interconnect Terminal Strip Oxygen Controller Transmitter Terminals CO Controller Transmitter Terminals 4 20 Feedback 4 20 Feedback 24 VDC 24 VDC Main Circuit Board Sample Draw Housing ...

Page 17: ...TOXIC 24V 4 20 TP BATT TP CO Pressure Switch Factory Wired H2S Not Used Pump Factory Wired White Red Green LEL Sensor Connector LEL Detector Black Oxygen Sensor Green White CO Sensor Plugs Into Far Side of Preamp Circuit Board I N S T R U M E N T S SENSOR GRN TP BLK SPAN Z ERO POW ER SIG P N 57 1050R K REV 0 TP GND 24V 4 20 RED WHT ...

Page 18: ...ple line press the pump reset switch and verify the flowmeter returns to a normal flow rate Setting the Zero Reading CAUTION If you suspect the presence of combustible gas carbon monoxide or an abnormal oxygen condition not 20 9 in the monitoring environment use the calibration kit and the zero air calibration cylinder to introduce fresh air to the sample draw adapter and verify an accurate zero s...

Page 19: ...duced 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 NOTE There is no flow fail indication for the LEL and oxygen channels on the 35 3010RKA 03 Maintenance This section describes maintenance procedures It includes preventive maintenance procedures T...

Page 20: ...ator 1 Screw the regulator into the calibration cylinder 2 Connect the calibration tubing from the regulator to the inlet line at or near the INLET fitting Gas will begin to flow 3 After approximately one minute verify that the reading for each channel at the controller stabilizes within 10 of the concentration of the test sample If the reading is not within 10 of the test sample calibrate the sam...

Page 21: ...ate Symptoms One or more of the sensors respond slowly or does not respond during the monthly response test Unable to accurately set the zero or response reading on one or more of the channels during the calibration procedure One or more of the sensors requires frequent calibration NOTE Under normal circumstances the sample draw detector requires calibration once a quarter Some applications may re...

Page 22: ... sample draw detector 3 Unscrew and remove the two screws that secure the retaining plate then lift the plate connector and sensor out of the housing 4 Unplug the connector from the socket that leads from the sensor 5 Plug the socket of the replacement sensor into the connector 6 Place the sensor in the oxygen sensor cavity then position the retaining plate on the two standoffs 7 Secure the retain...

Page 23: ...ew charcoal filter back into the metal clamp Adjusting the Low Flow Setting The factory set low flow setting is 0 6 SCFH 0 2 To adjust the low flow setting 1 Use the flow adjust potentiometer VR1 to set the flow to 0 6 SCFH If the sample draw detector goes into low flow alarm before you can adjust the flow down to 0 6 SCFH adjust the low flow potentiometer 1 4 turn clockwise then attempt to set th...

Page 24: ...ation mode at the controller 1 Open the housing door 2 Set a voltmeter to measure in the millivolt mV range 3 Plug the voltmeter into the test points on the LEL transmitter Plug the positive lead into the test point labeled TP plug the negative lead into the test point labeled TP 4 Use the following formula to determine the correct test points output for the calibrating sample Output mV calibratin...

Page 25: ...d to the sample tubing Returning to Normal Operation 1 Remove the voltmeter leads from the test points 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 5 Store the components of the calibration kit in a safe and convenient place Calibration Oxygen Detector This section describes how to cali...

Page 26: ...g sample for approximately 1 minute 4 After one minute check the mV output on the oxygen transmitter test points and verify that the reading matches the response reading 2 mV you determined earlier 292 mV for 12 oxygen 5 If necessary use the span pot on the transmitter to adjust the reading to match the correct response reading 6 Disconnect the sample tubing from the inlet line 7 Unscrew the regul...

Page 27: ...nd a 3 gas calibration cylinder Preparing for Calibration CAUTION This procedure may cause alarms at the controller Take appropriate action to avoid this such as entering the calibration mode at the controller 1 Open the housing door 2 Set a voltmeter to measure in the millivolt mV range 3 When checking the mV output of the CO channel plug the voltmeter leads into the test points in the AMP 1 sect...

Page 28: ... the sample draw detector s INLET fitting 3 Allow the calibration gas to flow for 1 minute 4 Check the mV output on the AMP 1 test points for CO and verify that the reading matches the response reading 2 mV you determined earlier 5 If necessary use the AMP 1 span pot to adjust the reading to match the correct response reading 6 Disconnect the sample tubing from the sample draw detector s inlet lin...

Page 29: ...ration kit 07 0034RK Sealing gasket for CO and H2S flow block cavities 30 0610RK Pump 33 0171RK Hydrophobic filter AcroPak 33 6095RK Charcoal filter CF 188 65 0601RK Oxygen sensor 81 0076RK 01 Zero air calibration cylinder 34 liter 81 0090RK 01 3 gas calibration gas cylinder 50 LEL methane 12 oxygen 50 ppm CO 34 liter 81 1055RK Regulator demand flow for 17 and 34 liter steel cylinders ES 1531 CO C...

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