RKI Instruments 35-3001A-02 User Manual

35-3001A-02 Oxygen

Sample-Draw Detector

Operator’s Manual

Part Number: 71-0308RK
Revision: P4
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.

35-3001A-02 Oxygen Sample-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.

35-3001A-02 Oxygen Sample-Draw Detector

Table of Contents

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

External Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Internal Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Mounting the Sample-Draw Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Removing the Inlet Fitting Tubing Stub, if Necessary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Connecting the Sample Lines to the Sample-Draw Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Wiring the Sample-Draw Detector to a Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Introducing Incoming Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Setting the Fresh Air Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Preventive Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Replacing Components of the Sample-Draw Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Adjusting the Low Flow Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Preparing for Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Setting the Fresh Air Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Setting the Zero Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Returning to Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

35-3001A-02 Oxygen Sample-Draw Detector

Overview

This operator’s manual describes the 35-3 001A-02 oxygen sample-draw detecto r . This manu al 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 oxygen sample-draw detector. See the controller Operator’s
Manual for information specific to the controller.

Target Gas and Detection Range Oxygen: 0 - 25% 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

Table 1: Specifications

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)
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 ± 0.5% O

WARNING: When using the 35-3001A-02, you must fo llow the instructions and warnings in

this manual to assure proper and safe operation of the 35-3001A-02 and to
minimize the risk of personal injury. Be sure to maintain and periodically
calibrate t h e 35-3001A- 02 as describe d in this manual.

Inlet

100 feet 0 feet

50 feet 50 feet

Inlet

100 feet 100 feet

2

Exhaust

Exhaust

35-3001A- 02 Oxygen Sample-Dr aw Detector • 1

Description

Sensor

Flow

Con trol

Valve

Fail LE D

Pilot LED

Pum p Reset

Switch

Flowmeter

This section describes the components of the oxygen sample-draw detector.

Zero Pot

Span Pot

O

W

X

+

Y
G

B

E

_

N

Pum p Connector

Flowmeter Circuit

Board Connector

Fact ory S et Pot

Test Points

100-500 m V Range

OXY

TOXIC

Detector
Termi nal
Strip

Controller

Terminal Strip

Oxy gen Amplif ier

S

SIG/PWR

Mounting
Foo t, 4X

Oxy gen
Sensor
Termi nal
Strip

Pum p

Oxy gen
Sensor

Oxy gen Flow
Block

Pressure

Switch

Adjustment

Screw

(behindPCB)

Hydrophobi c

Filter

This End To
Inlet F itting

Particle Filter

Inlet

Fit ting

Exhaust

Fit ting

INLET

EXHAUST

AMP

+

+

S

+

AMP2

+

S

+

AMP 1

AMP2

RS BG

W

OXY

LEL/IR

RGB

GW

S

+
OXY

W

LEL/IR

Detector/Amp
Terminal Strip

Int erconnect
Termi nal
Strip

3/4" Conduit Hub

Figure 1: Oxygen Sample-Draw Detector Component Location

2 • 35-3001A-02 Oxygen Sample-D raw Detector

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
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 7 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

Pressure Switch

Flowmeter PCB

Restrictor

Sensor

Flow

Control

Valve

Flowmeter

Oxygen

Sensor

ParticleFilter

Pump

Hydrophobic Filter

Figure 2: Oxygen Sample-Draw Detector Flow Diagram

35-3001A- 02 Oxygen Sample-Dr aw Detector • 3