RKI Instruments 35-3001-01 User Manual
35-3001-01
Combustible Gas Sample-Draw Detector
Operator’s Manual
Part Number: 71-0282RK
Revision: P6
Released: 9/17/14
www.rkiinstruments.com
WARNING
Read and understand this instruction manual before operating
detector . Improper use of the dete ctor could result in bodily harm
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.
T ypical calibration frequencies for most applications a re between
3 and 6 months, but can be required more often or less often
based on your usage.
35-3001-01 Combustible Gas Sa mple-Draw Detector
Product Warranty
RKI Instruments, Inc. warrants gas alarm equipment s old by us t o be free from def ects in material s,
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. This warrant y does not apply to those items which by their nature are subject
to deterioration or consumption in normal service, and which must b e cleaned, repaired, o r replaced
on a routine basis. Examples of such items are:
Warranty is voided by abuse including mechanical damage, alteration, rough handling, or repair
procedures not in accordance with the operator’s manual. This warranty 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. INCLUDING BUT N OT LIMITED T O, THE WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN
NO EVENT SHALL RKI INSTRUMENTS, INC. BE LIABLE FOR INDIRECT,
INCIDENTAL, OR CONSEQUENTIAL LOSS OR DAMAGE OF ANY KIND
CONNECTED WITH THE USE OF ITS PRODUCTS OR FAILURE OF ITS
PRODUCTS TO FUNCTION OR OPERATE PROPERLY.
a) Absorbent cartridges d) Batteries
b) Pump diaphragms and valves e) Filter elements
c) Fuses
This warranty covers instruments and parts sold to users by authorized distributors, dealers, and
representatives as appointed by RKI Instruments, Inc.
We do not assume indemnification for any accident or damage caused by the operation of this gas
monitor, and our warranty is limited to the replacement of parts or our complete goods.
35-3001-01 Combustible Gas Sample-Draw Detector
Table of Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
External Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Internal Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Mounting the Combustible Gas Sample-Draw Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Removing the Inlet Fitting Tubing Stub, if Necessary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Connecting the Sample Lines to the Sample-Draw Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Wiring the Combustible Gas Sample-Draw Detector to a Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Introducing Incoming Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Setting the Zero Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Preventive Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Replacing Components of the Combustible Gas Sample-Draw D etector. . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Adjusting the Low Flow Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Preparing for Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Setting the Zero Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Setting the Response Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Returning to Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
35-3001-01 Combustible Gas Sa mple-Draw Detector
Overview
This operator’s manual describes the 35-3001-01 combustible gas sample-draw detector. This
manual also describes how to install, start up, maintain, and calibrate the sample-draw detector
when using it with a gas monitoring controller. A parts list at the end of this manual lists
replacement parts and accessories for the sample-draw detector.
Specifications
Table 1 lists specifications for the combustible gas sample-draw detector. See the controller
Operator’s Manual for information specific to the controller.
Target Gas and Detection Range Combustible gas: 0 - 100% LEL
Input Power 24 VDC Nominal (18.5 VDC - 30 VDC)
Construction (housing) Fiberglass/polyester (NEMA 4X)
Dimensions 8.5 in. H x 6.5 in. W x 4.25 in. D
Table 1: Specifications
W eight 4.5 lbs.
Sampling Method Sample-draw
Sample Flow 3.0 SCFH typical, with no inlet or exhaust line
Flow to Sensor 1.0 SCFH (nominal)
Maximum Recommended Inlet/
Exhaust Line Length for
1/4” O.D. x 1/8” I.D. Tubing
Maximum Recommended Inlet/
Exhaust Line Length for
1/4” O.D. x 0.170” I.D. Tubing
Response Time 90% in 30 seconds
Accuracy ± 5% of reading or ± 2% LEL (whichever is greater)
WARNING: When using the 35-3001-01, you must follow the instructions and warnings in
this manual to assure proper and safe operation of the 35-3001-01 and to
minimize the risk of personal injury. Be sure to maintain and periodically
calibrate the 35-3001-01 as described in this manual.
Inlet
100 feet 0 feet
50 feet 50 feet
Inlet
100 feet 100 feet
Exhaust
Exhaust
35-3001-01 Co m b u s t i b l e G a s Sample-Draw Det e c t or • 1
Description
Sensor Flow
Control Valve
Fail LED
Pilot LED
This section describes the components of the combustible gas sample-draw detector.
Pump Connector
Flowmeter Circuit
Board Connector
Mounting
Foot, 4X
O
W
X
+
Y
G
B
E
_
N
Oxygen
Sensor
Terminal
Strip
Pump
LEL Sensor
Pump Reset
Pressure Switch
Adjus tmen t Scre w
(behind PCB)
Hydrophobic
This End To
Inlet Fitting
Particle Filter
Switch
Flowmeter
Filter
INLET
LEL Flow
Block
Detector/Amp
Terminal Strip
S
+
AMP 2SOXY
S
+
AMP 2
+
+
OXY
+
AMP
S
+
AMP 1
GW
R
W
LEL/ IR
R BG
W
LEL/ IR
BG
(Factory Wired)
Interconnect
Terminal
Strip
3/4" Conduit Hub
Inlet
Fitting
EXHAUST
Exhaust
Fitting
Figure 1: Combusti bl e Gas Sa mp l e-Draw Detector Component Location
External Components
This section describes the sample-draw detector’s external components.
Housing
The sample-draw detector’s fiberglass housing is weather- and corrosion-resistant. It is suitable fo r
2 • 35-3001-01 Combustibl e Gas Sample-Draw Detect or
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. The
flowmeter and status LEDs are visible through a window in the housing door.
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.
Sample Fittings
The sample fittings are located on the left side of the bottom of the housing. The inlet fitting is near
the front of the housing and the exhaust fitting is near the back of the housing. The inlet fitting has
a short factory installed tubing stub for use with the particle filter. The sample fittings accept 1/4 in.
rigid tubing. See the Installation section on page 6 to connect tubing to the sample fittings.
Inlet Fitting Tubing Stub
A short tubing stub comes factory installed in the inlet fittin g. It is used for connecting the particle
filter. If the particle filter is not used, or if you install the particle filter in a different location, the
tubing stub needs to be removed and replaced with tubing.
Conduit Hub
One 3/4” conduit hub is located on the right sid e of the bottom of the hous ing. It is used fo r routing
wiring into the housing by using conduit or an appropriate cable bushing.
Internal Components
This section describes the sample-draw detector’s internal components (see Figure 1). Figure 2
illustrates how the gas sample moves through the flow system.
Exhaust
Inlet
ParticleFilter
Pressure Switch
Flowmeter PCB
Restrictor
Flowmeter
LEL
Sensor
Sensor
Flow
Control
Valve
Pump
HydrophobicFilter
Figure 2: Combustible Gas Sample-Draw Detector Flow Diagram
Main Circuit Board
The main circuit board includes the detect or/amp terminal strip, intercon nect terminal st rip, oxygen
sensor terminal strip, pump connector, and flowmet er circuit board connector (see Figure 1).
35-3001-01 Co m b u s t i b l e G a s Sample-Draw Det e c t or • 3
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