RKI Instruments 65-2322-04SS User manual

RKI Instruments, Inc.
www.rkiinstruments.com
65-2322-04SS
Oxygen Transmitter
Operator’s Manual
Part Number: 71-0481
Revision: P1
Released: 1/28/19

65-2322-04SS Oxygen Transmitter
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.

65-2322-04SS Oxygen Transmitter
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

65-2322-04SS Oxygen Transmitter
Table of Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Oxygen Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Calibration Adapter/Splash Guard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Amplifier Junction Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Detector Junction Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Mounting the Oxygen Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Wiring the Detector to the Amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Wiring the Amplifier to a Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Introducing Incoming Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Setting the Fresh Air Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Replacing Components of the Oxygen Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Determining Response Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Preparing for Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Setting the Fresh Air Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Setting the Zero Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Returning to Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

65-2322-04SS Oxygen Transmitter • 5
Overview
This manual describes the 65-2322-04SS explosion-proof oxygen (O2) transmitter. This
manual also describes how to install, start up, maintain, and calibrate the transmitter. A
parts list at the end of this manual lists replacement parts and accessories for the oxygen
transmitter.
Specifications
WARNING: Do not use this product in a manner not specified in this instruction
manual.
Table 1 lists specifications for the oxygen transmitter.
NOTE: The following symbol on the detector label is a caution to the user to refer to this
documentation for installation and operation instructions:
WARNING: When using the 65-2322-04SS, you must follow the instructions and
warnings in this manual to assure proper and safe operation of the
65-2322-04SS and to minimize the risk of personal injury. Be sure to
maintain and periodically calibrate the 65-2322-04SS as described in this
manual.
Table 1: Specifications
Target Gas Oxygen (O2)
Detection Range 0 to 100 PPM (parts per million)
Area Classification Explosion-proof for Class I, Groups B, C, and D
Temperature Code T6
Installation Category Installation Category 1. Signal level, special equipment or parts of
equipment, telecommunication, electronic, etc., with smaller
transient overvoltages than Installation Category (Overvoltage
Category) II (ref. IEC 664).
Input Voltage 11 VDC - 30 VDC
Sampling Method Diffusion
Signal Output 4 to 20 mA
Oxygen Detector Signal Output 0 mV at 0% oxygen nominal
18 mV at 25% oxygen nominal
Response Time 90% in 30 seconds
Accuracy ± 0.5% O2
!

6 • 65-2322-04SS Oxygen Transmitter
Description
This section describes the components of the oxygen transmitter. The transmitter is a 4 - 20
mA type detector head. It consists of the oxygen detector, calibration adapter/splash
guard, amplifier, the amplifier junction box, and the detector junction box. The two-
junction-box configuration is intended for situations where the detector needs to be
installed at an inaccessible location. The detector junction box can be installed at the
inaccessible location and the amplifier junction box can be installed in a more readily
accessible area.
Figure 1: Component Location
TO X IC OX Y
S
SIG/PWR
Terminal Strip
Amplifier
Detector J-Box
Oxygen Detector
SPAN
ZERO
Amplifier J-Box
Calibration Adapter/Splash Guard

65-2322-04SS Oxygen Transmitter • 7
Oxygen Detector
The oxygen detector consists of the detector housing body, detector housing cap, cap
gasket, and the plug-in sensor.
Figure 2: Oxygen Detector Component Location
Detector Housing Body
The detector housing body protects the electronic components within the housing. Use the
mounting threads at the top of the housing to screw the oxygen detector into the 3/4 NPT
hub on the bottom of the junction box. Two wires extend from the top of the detector
housing body. Use these wires to connect the oxygen detector to the amplifier. One of the
wires is white and one of the wires is green.
The housing includes two sockets installed on a circuit board. These sockets accept the
plug-in sensor’s two pins to provide electrical connection for the sensor. The circuit board
with the sockets conditions the sensor’s signal before the signal reaches the amplifier.
Housing Cap & Cap Gasket
The housing cap screws onto the detector housing. It retains the plug-in sensor and
protects it from damage. A foam gasket is installed inside the housing cap that seals
against the sensor face. The housing cap also includes a flame arrestor which contains any
sparks that may occur within the detector and a flame arrestor guard which protects the
flame arrestor from damage. Unscrew the detector cap to access the plug-in sensor for
maintenance or replacement. A cap gasket seals the interface between the housing and
cap.
Plug-In Oxygen Sensor
The plug-in sensor is secured in the detector assembly by the housing cap. Through a
series of chemical and electrical reactions, the sensor produces a millivolt output that
corresponds to the detection range of the transmitter.
Cap Gasket
Flame Arrestor
Guard
Detector Housing Cap
Plug-in Oxygen Sensor
Detector HousingBody

8 • 65-2322-04SS Oxygen Transmitter
Calibration Adapter/Splash Guard
A calibration adapter/splash guard is installed on the oxygen detector. A fitting at the
bottom of the calibration adapter/splash guard allows a length of tubing to be connected
for calibration and routed to a more easily accessible location (near the amplifier junction
box is optimal for ease of calibration). The calibration adapter/splash guard also protects
the detector from splashing water or direct water spray.
Amplifier
The amplifier converts the electrical output from the sensor to a 4 to 20 mA signal that
corresponds to the detection range and transmits the signal to a gas monitoring controller.
A foam gasket that orients the amplifier and keeps it from rotating is installed on the
bottom of the amplifier. The amplifier includes the controller terminal strip, detector
terminal strip, zero pot, span pot, and test points (Figure 3).
Figure 3: Amplifier Component Location
Controller Terminal Strip
The controller terminal strip is a two position plug-in style terminal strip located at the
top edge of the amplifier. Use the controller terminal strip to connect the amplifier to a
controller.
Detector Terminal Strip
The detector terminal strip is a four-point plug-in style terminal strip near the bottom of
the amplifier. Use the detector terminal strip to connect the oxygen detector to the
amplifier.
Zero Pot
The zero pot is located in the upper left corner of the amplifier (see Figure 3). Use a small
flat blade screwdriver to turn the zero pot’s adjustment screw and adjust the amplifier’s
zero (oxygen free) output during the calibration procedure. Turn the adjustment screw
clockwise to increase the zero output and counterclockwise to decrease the zero output.
SIG/PWR
S
TOXIC OXY
Detector Terminal Strip
Controller Terminal Strip
SPAN
ZERO
+ Test Point (Red)
- Test Point (Black)
Factory Adjust Pot
Span Pot
Zero Pot

65-2322-04SS Oxygen Transmitter • 9
Span Pot
The span pot is located to the right of the zero pot (see Figure 3). Use a small flat blade
screwdriver to turn the span pot’s adjustment screw and adjust the amplifier’s fresh air
output during the start up and calibration procedures. Turn the adjustment screw
clockwise to increase the output and counterclockwise to decrease the output.
CAUTION: The third potentiometer is factory-set. Do not adjust it.
Test Points
The test points (red and black) are on the left side of the amplifier (see Figure 3). The test
points produce a 100mV to 500 mV output that corresponds to the transmitter’s 4 to 20
mA output. Use the test points and a voltmeter to measure the transmitter’s output
during the start-up and calibration procedures. The black test point in the lower left
corner is the negative (-) test point and the red test point below the zero pot is the positive
(+) test point.
Amplifier Junction Box
The amplifier junction box protects the amplifier and wiring connections made to the
amplifier. Use the top 3/4 NPT conduit hub to connect wiring from the amplifier to the
controller. Use the bottom 3/4 NPT conduit hub to wire the remotely installed oxygen
detector. Use the cover on the front of the junction box to access the interior of the junction
box. The amplifier is factory installed in the junction box. Three spacers installed on the
back of the junction box control the distance of the junction box from a mounting surface.
Detector Junction Box
The stainless steel detector junction box is intended to be installed remotely from the
amplifier junction box. The oxygen detector is factory installed in the bottom 3/4 NPT
conduit hub. A terminal strip is provided for wiring connections and the detector is
factory wired to one side of this terminal strip. The other side of the terminal strip is for
user-supplied wiring to the detector terminal strip located in the amplifier junction box.
This wiring should go through the top 3/4 NPT conduit hub. An O-ring seals the interface
between the junction box cover and the junction box base.
A cover on the front of the junction box allows access to the interior of the junction box. A
locking set screw on the junction box cover allows you to secure the junction box cover
and prevent it from being removed.

10 • 65-2322-04SS Oxygen Transmitter
Installation
This section describes procedures to mount the oxygen transmitter in the monitoring
environment and wire the transmitter to a controller.
Mounting the Oxygen Transmitter
1. Select a mounting site that is representative of the monitoring environment. Consider
the following when you select the mounting site.
• For the amplifier junction box, select a site where the junction box is not likely to
be bumped or disturbed. Make sure there is sufficient room to perform start-up,
maintenance, and calibration procedures. The site should be easily accessible.
• For the detector junction box, select a site that is at breathing level.
• The junction boxes should be mounted no further than 200 feet from each other.
2. Amplifier junction box dimensions are shown in Figure 4. Detector junction box
dimensions are shown in Figure 5.
Figure 4: Amplifier Junction Box Dimensions
2.70 .38
Ø3.65
3/4 Conduit Hub
3/4 Conduit Hub
5.25
Rubber
Spacer,
3X