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RKI Instruments 35-3010RKA-04H, Руководство оператора

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35-3010RKA-04H Sample-Draw Detector Head

Description

 • 

15

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 Detector” on page 17 for all wiring procedures related to 
the sample-draw detector.

Amp 1 and Amp 2 Circuits

These circuits are located to the left of the sensor/transmitter terminal strip. They each include test 
points, a zero pot, and a span pot. Amp 1 is on the left and is for the CO channel. Amp 2 is on the 
right and is for the H2S channel.
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.
The test points are labeled 

CAL-1

 and 

CAL+1

 for the CO channel and 

CAL-2

 and 

CAL+2

 for 

the H2S channel. No output is available at either set of test points.

Pump Terminal Strip

The pump terminal strip is the four-point terminal in the top left corner of the circuit 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 17 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 and is rated for 2 amps at 25 VDC (resistive). If the pressure switch senses a 
low flow condition, the relay interrupts the sensor signal from the direct connect hydrogen and 
oxygen channels and the 4-20 mA signal from the CO and H

2

S channels which will cause a 

downscale reading at the controller or recording device. 

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. To reset the low flow condition and start the pump 
again, press and hold the reset switch for about 2 seconds, then release. 

Содержание 35-3010RKA-04H

Страница 1: ...RKI Instruments Inc www rkiinstruments com 35 3010RKA 04H Sample Draw Detector Head Operator s Manual Part Number 71 0605 Revision P1 Released 8 16 22 ...

Страница 2: ...rm or death Periodic 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 For most applications typical calibration frequencies are between 3 and 6 months but can be more often or less often based on your usage ...

Страница 3: ...arranty indicates the full extent of our liability and we are not responsible for removal or replacement 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 INCLUD...

Страница 4: ...tor 17 Wiring the Sample Draw Detector to a Controller 17 Start Up 20 Introducing Incoming Power 20 Setting the Zero Reading 20 Operation 21 Normal Operation 21 Low Flow Alarm 21 Maintenance 22 Preventive Maintenance 22 Troubleshooting 22 Replacing Components of the Sample Draw Detector 24 Adjusting the Low Flow Setting 25 Calibration Frequency 26 Calibration Hydrogen Detector 26 Preparing for Cal...

Страница 5: ...ector Head Operator s Manual 5 Returning to Normal Operation 27 Calibration Oxygen Detector 28 Preparing for Calibration 28 Setting the Zero Reading 29 Setting the Fresh Air Reading 29 Returning to Normal Operation 29 Parts List 30 ...

Страница 6: ...rnings 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 Table 1 Specifications Target Gases Detection Ranges Hydrogen H2 0 100 LEL Oxygen O2 0 25 volume Input Power 24 VDC Current Draw 275 mA Output Signals 4 20 mA each channel Constructi...

Страница 7: ...de 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 4 2 0 ZERO S PAN B K R D O X Y T P B A T T W F B T O X I C T O X I C Flow Block Amp 1 T P O X Y G 2 4V Hydrophobic Filter A...

Страница 8: ...etector s flow system consists of the INLET fitting hydrophobic filter charcoal filter pump flowmeter bypass valve status lights pressure switch flow block and EXHAUST fitting see Figure 1 Figure 2 illustrates how the gas sample moves through the flow system Figure 2 Sample Draw Detector Flow Diagram Oxygen Charcoal Filter CO Pressure Switch Flow meter Bypass Valve Flow Block H2S H2 Pump Exhaust I...

Страница 9: ...luded in this version of the sample draw detector in case a CO sensor is added in the field If a CO sensor is added in the field a new charcoal filter should also be installed Pump The pump is located to the left of the main circuit board near the bottom left of the sample draw detector The pump pulls the gas sample into the sample draw detector The pump operates on 24 VAC which is generated from ...

Страница 10: ...ock routes the sampled air to each sensor EXHAUST Fitting The EXHAUST fitting on the bottom of the housing allows the gas sample to exit the sample draw detector The EXHAUST fitting accepts 1 4 in rigid tubing See Installation on page 16 for instructions to connect tubing to the EXHAUST fitting Detection System The detection system consists of the gas sensors LEL and oxygen transmitters preamp cir...

Страница 11: ...raw detector The oxygen transmitter converts the output to a 4 20 mA signal which can be used by a recording or monitoring device Connector 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 Sensor L...

Страница 12: ...he 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 sensor and main circuit board Test Points The test points are located on the left side of...

Страница 13: ...e detector terminal strip is the four point terminal strip near the bottom edge of the transmitter It is factory wired to the transmitter Interconnect 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 ...

Страница 14: ...interconnect terminal strip sensor transmitter terminal strip amp 1 circuit amp 2 circuit pump terminal strip relay and reset switch NOTE The flowmeter and status lights are mounted to the main circuit board but are considered part of the flow system Interconnect Terminal Strip The interconnect terminal strip is the sixteen point terminal strip near the bottom edge of the main circuit board Use th...

Страница 15: ...s available at either set of test points Pump Terminal Strip The pump terminal strip is the four point terminal in the top left corner of the circuit 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 17 for all wiring procedures rela...

Страница 16: ...ns at the bottom of the housing and tubing connections at the right of the housing Make sure there is sufficient room to perform start up maintenance and calibration procedures Figure 6 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 ...

Страница 17: ...bing at the sampling area CAUTION Avoid loops or slumps in the incoming sample line To reduce response time keep the incoming sample line as short as possible 3 Attach rigid sample tubing to the EXHAUST fitting 4 Route the opposite end of the tubing to an open area where the sample can safely disperse Wiring the Sample Draw Detector WARNING Always verify that the power source is OFF before you mak...

Страница 18: ...cable or wires in conduit leading from the sample draw detector to the controller 8 Connect the drain wire to an available chassis ground at the controller RKI controllers typically have a ground stud that can be used to ground the cable s drain wire Figure 7 External Field Wiring Sample Draw Detector LEL Controller Transmitter Terminals 24 VDC 4 20 Feedback Interconnect Terminal Strip Oxygen Cont...

Страница 19: ...SPAN ZERO G OX Y BK W RD OXY TOXIC 24V 4 20 FB TP BATT TP CO Not Used H2S Not Used Pump Factory Wired Pressure Switch Factory Wired White Red Green LEL Sensor Connector LEL Detector Black Oxygen Sensor Green White I N S T R U M E N T S SENSOR GRN TP BLK SPAN ZERO POWER SIG P N 57 1050R K REV 0 TP GND 24V 4 20 RED WHT ...

Страница 20: ...sts for leaks in the sample line This test may cause a low flow condition at the sample draw detector 7 Verify that the incoming sample line is not leaking To test the sample line plug the open end of the sample line with your thumb If the flowmeter ball drops to the bottom of the flowmeter the incoming sample line is not leaking 8 Remove your thumb from the sample line press the pump reset switch...

Страница 21: ...lose the housing door Operation Normal Operation During normal operation the Pilot LED will be on and the flowmeter will indicate about 1 2 SCFH The current gas readings will be indicated at the controller See the controller s operator s manual for a description of the reading indications Low Flow Alarm If the flowrate falls below 0 6 SCFH 0 2 SCFH then the sample draw detector will initiate a low...

Страница 22: ...hannel 100 mV at the LEL transmitter test points and 20 9 for the oxygen channel 434 mV at the oxygen transmitter test points Investigate significant changes in the reading Quarterly Calibrate the sample draw detector as described in the Calibration section Troubleshooting The troubleshooting guide describes symptoms probable causes and recommended action for problems you may encounter with the sa...

Страница 23: ...se 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 require a more frequent calibration schedule Probable Causes The calibration cylinder is low out dated or defective The sample draw detector s flow rate ...

Страница 24: ...placement sensor as described in Calibration Hydrogen Detector on page 26 Replacing the Oxygen Sensor 1 Turn off incoming power 2 Open the housing door of the 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 r...

Страница 25: ...he new 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 se...

Страница 26: ...ector This section describes how to calibrate the hydrogen sensor in the sample draw detector It includes procedures to prepare for calibration set the zero reading set the response reading and return to normal operation NOTE This procedure describes calibration using a demand flow regulator a zero air calibration cylinder and a hydrogen calibration cylinder Preparing for Calibration CAUTION This ...

Страница 27: ...libration cylinder Leave the sample tubing connected to the regulator Setting the Response Reading 1 Screw the regulator into the hydrogen calibration cylinder 2 Connect the sample tubing from the regulator to the inlet line at or near the sample draw detector s INLET fitting 3 Allow the calibration gas to flow for one minute 4 Check the mV output on the LEL transmitter test points and verify that...

Страница 28: ... 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 oxygen transmitter Plug the positive lead into the test point labeled TP plug the negative lead into the test point labeled TP Setting the Zero Reading 1 Screw the regulator into the nitrogen calibration cylinder 2 Connect the calibration kit sample tubing...

Страница 29: ... to the inlet line at or near the INLET fitting 4 Allow the gas to flow for one minute 5 Verify a voltmeter reading of 434 mV 2 mV at the test points as described in the Preparing for Calibration section above 6 If necessary use a small flat blade screwdriver to adjust the zero pot until the voltmeter reading is 434 mV 2 mV 7 Disconnect the sample tubing from the inlet line 8 Unscrew the regulator...

Страница 30: ...RK Charcoal filter CF 188 61 0155 01 Hydrogen sensor 65 0601RK Oxygen sensor 81 0002RK 01 Calibration cylinder H2 50 LEL in air 34 liter 81 0002RK 03 Calibration cylinder H2 50 LEL in air 103 liter 81 0076RK 01 Zero air calibration cylinder 34 liter 81 0078RK 01 Calibration cylinder N2 100 34 liter 81 0078RK 03 Calibration cylinder N2 100 103 liter 81 1054RK Regulator demand flow for 34 liter 58 l...

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