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Sample Draw Combustible Gas Detector • 1

 

35-3000RKA-LEL Sample Draw Combustible Gas 
Detector

 

Specifications

 

Table 1 lists specifications for the sample draw combustible gas detector.

 

Table 1: Specifications

 

Target Gas

Combustible Gas

Input Power

24 VDC

Construction (housing)

Fiberglass/polyester (NEMA 4X)

Dimensions

8.5 in. H x 6.5 in. W x 4.25 in. D

Weight

4.5 lbs.

Sampling Method

sample draw

Sample Flow

1.5 SCFH (nominal)

Detection Range

0 to 100% LEL

Response Time

90% in 30 seconds

Linearity

 

±

 

5% of detection range

Repeatability

 

±

 

2% of detection range

Summary of Contents for 35-3000RKA-LEL

Page 1: ...detector Table 1 Specifications Target Gas Combustible Gas Input Power 24 VDC Construction housing Fiberglass polyester NEMA 4X Dimensions 8 5 in H x 6 5 in W x 4 25 in D Weight 4 5 lbs Sampling Meth...

Page 2: ...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 connec...

Page 3: ...d or clogged Pump The pump is behind the main circuit board near the top of the sample draw detector The pump pulls the gas sample into the sample draw detector The pump operates on 24 VAC which is ge...

Page 4: ...he EXHAUST fitting accepts 1 4 in rigid tubing See the Installation section on page 7 to connect tubing to the EXHAUST fitting Detection System The detection system consists of the combustible gas sen...

Page 5: ...f 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 the transmitter and are labeled TP and TP A 100 mV 5...

Page 6: ...sure switch are factory wired to the circuit board See the Installation on page 7 for all wiring procedures related to the sample draw detector Relay The relay is to the left of the detector terminal...

Page 7: ...ider the following when you select the mounting site Is there enough room to open the housing door and make wiring connections at the bottom of the housing and tubing connections at the right of the h...

Page 8: ...to seal the connection between the tubing and the INLET fitting See Appendix A Parts List for an example of an appropriate metal insert 2 Place the opposite end of the tubing at the sampling area CAUT...

Page 9: ...e Gas Detector 4 20 Feedback Ground WHT GR N BLK GN D 2 4 V _ LEL O2 AM P P AM P 4 2 0 GREEN BLA C K WH ITE RED PUMP ASSY INTERNALLY WIRED 24VDC GND 24V 4 20 RD PUM P PSW TP TP ZERO SPAN GND 24V 4 20...

Page 10: ...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 7 Remove your thumb from the sample line verify the flowmeter retu...

Page 11: ...e target gas Preparing for the response test NOTE This procedure describes the RKI calibration kit that includes a gas collection bag A calibration kit that uses a demand flow regulator is also availa...

Page 12: ...ems you may encounter with the sample draw combustible gas detector NOTE This troubleshooting guide describes sample draw detector problems only See the instruction manual for monitoring device if it...

Page 13: ...pump etc The sample draw detector is malfunctioning The demand flow regulator is not operating properly if one is used for calibration instead of a gas bag Recommended action 1 Verify that the calibra...

Page 14: ...row indicates the direction of the sample flow 3 Disconnect the filter from the elbows on each end of the filter then remove the filter from the sample draw detector 4 Make sure the arrow is pointing...

Page 15: ...low to 0 6 SCFH 2 Slowly turn the low flow potentiometer counterclockwise just until the sample draw detector goes into low flow alarm NOTE The low flow potentiometer is accessible through a circular...

Page 16: ...the correct test points output for the calibrating sample Output mV calibrating sample fullscale X 400 100 For example with a calibrating sample of 50 LEL and a fullscale setting of 100 LEL the corre...

Page 17: ...e sample tubing from the inlet line then close the clamp Setting the Response Reading 1 Connect the sample tubing from the gas collection bag to the fixed flow regulator then open the clamp 2 Screw th...

Page 18: ...Filter Boston DFU9933 05 DQ 57 1050RK Transmitter specify target gas when ordering 61 0145RK Combustible gas sensor NC 6240 plug in type LEL range 81 0002RK 01 Calibration cylinder 50 LEL Hydrogen 34...

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