RKI Instruments 35-3001A-01 1 Series User manual

www.rkiinstruments.com
35-3001A-01-XX1
Sample-Draw Detector
Operator’s Manual
Part Number: 71-0585
Revision: P1
Released: 1/25/22

2 • 35-3001A-01-XX1 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. For most applications,
typical calibration frequencies are between 3 and 6 months but can be
more often or less often based on your usage.

35-3001A-01-XX1 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:
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 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.
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.
a) Absorbent cartridges d) Batteries
b) Pump diaphragms and valves e) Filter elements
c) Fuses

4 • 35-3001A-01-XX1 Sample-Draw Detector Operator’s Manual
Table of Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
External Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Internal Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Mounting the Sample-Draw Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Connecting the Sample Lines to the Sample-Draw Detector . . . . . . . . . . . . . . . . . . . . . . 14
Wiring the Sample-Draw Detector to a Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Introducing Incoming Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Setting the Zero Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Low Flow Contact Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Replacing Components of the Sample-Draw Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Adjusting the Low Flow Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Removing the Particle Filter’s Tubing Stub, if Necessary . . . . . . . . . . . . . . . . . . . . . . . . 25
Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Preparing for Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Setting the Zero Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Setting the Response Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Returning to Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

35-3001A-01-XX1 Sample-Draw Detector Operator’s Manual • 5
Overview
This operator’s manual describes the 35-3001A-01-XX1 sample-draw detector. This version
of the sample-draw detector has low flow contacts that allow the user to monitor the detector’s
low flow status. 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 sample-draw detector. See the controller Operator’s Manual
for information specific to the controller.
Table 1:Specifications
Target Gas and Detection
Range
35-3001A-01-011
•Methane(CH
4): 0 - 100% LEL
35-3001A-01-021
• General hydrocarbons (calibrated to propane): 0 - 100% LEL
35-3001A-01-031
•Methane(CH
4): 0 - 100% volume
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
100 feet 0 feet
50 feet 50 feet

6 • 35-3001A-01-XX1 Sample-Draw Detector Operator’s Manual
WARNING: When using the 35-3001A-01-XX1, you must follow the instructions and
warnings in this manual to assure proper and safe operation of the 35-3001A-
01-XX1 and to minimize the risk of personal injury. Be sure to maintain and
periodically calibrate the 35-3001A-01-XX1 as described in this manual.
Maximum Recommended
Inlet/Exhaust Line Length
for 1/4” O.D. x 0.170” I.D.
Tubing
Inlet Exhaust
100 feet 100 feet
Response Time 90% in 30 seconds
Accuracy ± 5% of reading or ± 2% of full scale (whichever is greater)
Table 1:Specifications

35-3001A-01-XX1 Sample-Draw Detector Operator’s Manual • 7
Description
This section describes the components of the sample-draw detector.
Figure 1: Sample-Draw Detector Component Location
Oxygen
Sensor
Terminal
Strip
Mounting
Foot, 4X
+
B
O
X
Y
G
E
N
_
IR Sensor
(inside block)
Pump
W
S
PWR /SIG
IR Sensor PCB
Detector/Amp
Terminal Strip
(Factory
Wired)+
S
AMP 2
AMP
+
+OXY
S
Pilot LED
Fail LED
Sensor Flow
Control Valve
Pump Reset
Switch
Pressure
Switch
Adjustment
Screw
(behind PCB)
Flowmeter
Interconnect
Terminal
Strip
S
+AMP 1
+
AMP 2 +
W G
S
OXY
Particle
Filter
Flowmeter Circuit
Board Connector
FLOW
FAIL
Inlet
Fitting
Exhaust
Fitting
This End
To Inlet
Fitting
FLOW
FAIL
3/4 NPT Conduit Hub
IR Flow Block
Pump Connector
IR Amplifier
WLELG BR
Sensor
Current
148mA
INLET
EXHAUST
Hydrophobic
Filter

8 • 35-3001A-01-XX1 Sample-Draw Detector Operator’s Manual
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 12 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 NPT 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.

35-3001A-01-XX1 Sample-Draw Detector Operator’s Manual • 9
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: 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 amplifier
to the main circuit board.
NOTE: The amplifier is factory-wired to the main circuit board. See the “Installation”
section on page 12 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.
Oxygen Sensor Terminal Strip
The oxygen sensor terminal strip is a two-point terminal strip in the upper right corner of the
main circuit board. This terminal strip is not used in this version of the sample-draw detector.
Pump
IR
Sensor
Flowmeter
Particle Filter
Flowmeter PCB
Exhaust Pressure Switch
Hydrophobic Filter
Inlet Restrictor
Sensor
Flow
Control
Valve

10 • 35-3001A-01-XX1 Sample-Draw Detector Operator’s Manual
Pump Connector
The pump connector is the two-point connector below the oxygen terminal strip in the upper
right corner of the main circuit board. Use the pump connector to connect the pump to the
main circuit board.
NOTE: The pump is factory-wired to the main circuit board. See “Installation” on page 12
for all wiring procedures related to the sample-draw detector.
Flowmeter Circuit Board Connector
The flowmeter circuit board connector is a six-position connector in the upper left corner of
the main circuit board. Use the flowmeter circuit board connector to connect the flowmeter
circuit board to the main circuit board.
NOTE: The flowmeter circuit board is factory wired to the main circuit board. See
“Installation” on page 12 for all wiring procedures related to the sample-draw
detector.
Flowmeter Circuit Board
The flowmeter circuit board is mounted to the left side of the main circuit board using
standoffs. It includes the flowmeter, sensor flow control valve, status LEDs, pressure switch,
and pump reset switch.
Flowmeter
The flowmeter is mounted to the right side of the flowmeter circuit board. You can see it
through the window in the door. A ball in the flowmeter column indicates the flow rate to the
sensor. The flowmeter measures the flow in the range 0.2 to 2.0 SCFH (Standard Cubic Feet
per Hour). The optimum flow rate is 1.0 SCFH.
Sensor Flow Control Valve
The sensor flow control valve is mounted to the flowmeter circuit board above the flowmeter.
The sensor flow control valve adjusts the flow rate to the detector. Turn the valve’s knob
counterclockwise to increase the flow and clockwise to decrease the flow.
Status LEDs
Two status LEDs are above the flowmeter. They are also visible through the window in the
housing door. The green Pilot LED is on when the sample-draw detector is receiving power
from the controller. The red Fail LED is on when the sample flow rate is below the low flow
level.
Pressure Switch
The pressure switch is mounted to the back of the flowmeter circuit board. The pressure
switch monitors the flow rate of the incoming gas sample.