RKI Instruments 35-3001A-08-01 User manual

RKI Instruments, Inc.
www.rkiinstruments.com
35-3001A-08-XX
Sample-Draw Detector
Operator’s Manual
Part Number: 71-0630
Revision: P1
Released: 1/31/23

2• 35-3001A-08-XX Sample-Draw Detector Operator’s Manual
WARNING
Read and understand this instruction manual before operating
detector. Improper use of the detector 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.
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.

35-3001A-08-XX Sample-Draw Detector Operator’s Manual • 3
Product Warranty
RKI Instruments, Inc. warrants gas alarm equipment sold by us to be free from defects in
materials, 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 warranty does not apply to those items which by their nature are
subject to deterioration or consumption in normal service, and which must be cleaned, repaired, or
replaced on a routine basis. Examples of such items are:
• Absorbent cartridges
•Fuses
• Pump diaphragms and valves
•Batteries
• Filter elements
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 NOT LIMITED TO,
THE WARRANTY OF MERCHANTABILITY OR FITNESS FOR APARTICULAR PURPOSE. INNO
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.
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.

4• 35-3001A-08-XX Sample-Draw Detector Operator’s Manual
Table of Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
External Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Internal Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Mounting the Sample-Draw Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Connecting the Sample Lines to the Sample-Draw Detector . . . . . . . . . . . . . . . . . . . . . . . . . 16
Wiring the Sample-Draw Detector to a Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Introducing Incoming Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Setting the Zero Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Replacing Components of the Sample-Draw Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Adjusting the Low Flow Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Removing the Particle Filter’s Tubing Stub, if Necessary . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Calibration, IR Combustible Gas Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Preparing for Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Setting the Zero Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Setting the Response Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Returning to Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Calibration, CO Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Preparing for Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

35-3001A-08-XX Sample-Draw Detector Operator’s Manual • 5
Setting the Zero Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Setting the Response Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Returning to Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

35-3001A-08-XX Sample-Draw Detector Operator’s Manual Overview • 6
Overview
This operator’s manual describes the 35-3001A-08-XX combustible gas/carbon monoxide
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/carbon monoxide sample-draw detector. See
the controller Operator’s Manual for information specific to the controller.
Table 1: Specifications
Target Gases and
Detection Range
Combustible Gas:
• 35-3001A-08-01: CH4, 0 - 100% LEL
• 35-3001A-08-02: General hydrocarbons (propane
calibration standard), 0 - 100% LEL
• 35-3001A-08-03: CH4, 0 - 100% volume
Carbon Monoxide: 0 - 300 ppm
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
Weight 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)
Low Flow Setpoint 0.6 ± 0.1 SCFH
Maximum
Recommended Inlet/
Exhaust Line Length
for 1/4” O.D. x 1/8” I.D.
Tubing
Inlet Exhaust
50 feet 0 feet
* RKI Instruments, Inc. does not recommend installing this
tubing size on both the inlet and exhaust.
Maximum
Recommended Inlet/
Exhaust Line Length
for 1/4” O.D. x 0.170”
I.D. Tubing
Inlet Exhaust
50 feet 50 feet
75 feet 0 feet

35-3001A-08-XX Sample-Draw Detector Specifications • 7
WARNING: When using the 35-3001A-08-XX, you must follow the instructions and warnings
in this manual to assure proper and safe operation of the 35-3001A-08-XX and to
minimize the risk of personal injury. Be sure to maintain and periodically
calibrate the 35-3001A-08-XX as described in this manual.
Response Time 90% in 30 seconds
Accuracy
Combustible Gas:
± 5% of reading or ± 2% of full scale (whichever is greater)
Carbon Monoxide:
± 5% of reading or ± 5 ppm CO (whichever is greater)
Table 1: Specifications

8• Description 35-3001A-08-XX Sample-Draw Detector
Description
This section describes the components of the combustible gas/carbon monoxide sample-draw
detector.
Figure 1: Combustible Gas/Carbon Monoxide Sample-Draw Detector Component Location
CO Amplifier
CO Sensor
(inside block)
Oxygen
Sensor
Terminal
Strip
Pump Connector
B
_
W
+
W
LE L
G BR S
PWR /SIG
G B
IRFlow Block
IR Sensor
(inside block)
IR Sensor PCB
+
S+
AMP OX Y AMP 2
+S R
Fail LED
Pilot LED
Charcoal
Filter
G B
Pressure Switch
Adjustment Screw
(behind PCB)
Pump Reset
Switch
AMP 1
+
AMP 2
S S R
+
W G
OXY
+
Pump
ParticleFilter
Sensor Flow
Control Valve
O
X
Y
G
E
N
This End To
Inlet Fitting
Interconnect
Terminal
Strip
Flowmeter
Flowmeter Circuit
Board Connector
W
LEL / IR
W
LEL / IR
Inlet
Fitting
Exhaust
Fitting
3/4" Conduit Hub
CO Flow
Block
INLET
EXHAUST
IR Amplifier
Mounting Foot, 4X
Hydrophobic
Filter
Detector/Amp
Terminal Strip
(Factory Wired)

35-3001A-08-XX Sample-Draw Detector External Components • 9
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
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. 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 sample
fittings accept 1/4 in. rigid tubing. See the Installation section on page 15 to connect tubing to the
sample fittings.
Particle Filter
A particle filter with a tubing stub on one end is shipped with the instrument but it is not factory
installed. If the particle filter is installed directly to the inlet fitting, the tubing stub must be used.
If the particle filter is installed somewhere else, like at the end of the inlet line, the tubing stub can
be used or removed.
Conduit Hub
One 3/4” conduit hub is located on the right side of the bottom of the housing. It is used for
routing wiring into the housing by using conduit or an appropriate cable bushing.

10 • Internal Components 35-3001A-08-XX Sample-Draw Detector
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.
Figure 2: Combustible Gas/Carbon Monoxide Sample-Draw Detector Flow Diagram
Main Circuit Board
The main circuit board includes the detector/amp terminal strip, interconnect terminal strip,
oxygen sensor terminal strip, pump connector, and flowmeter circuit board connector (see Figure
1).
Detector/Amp Terminal Strip
The detector/amp terminal strip is the upper twelve-point terminal strip in the bottom right corner
of the main circuit board. Use the detector/amp terminal strip to connect the IR combustible gas
amplifier and the CO amplifier to the main circuit board.
NOTE: The IR combustible gas amplifier and CO amplifier are factory-wired to the main circuit
board. See the “Installation” section on page 15 for all wiring procedures related to the
sample-draw detector.
Interconnect Terminal Strip
The interconnect terminal strip is the lower twelve-point terminal strip in the bottom right corner
of the main circuit board. Use the interconnect terminal strip to connect the sample-draw detector
to a controller.
Restrictor
Pump
IR
Sensor
Carbon
Monoxide
Sensor
Flowmeter
Particle Filter
Sensor Flow
Control Valve
Flowmeter PCB
Exhaust Pressure Switch
Hydrophobic Filter
Inlet Charcoal
Filter