RKI Instruments 65-2330RKSS User manual

RKI Instruments, Inc.
www.rkiinstruments.com
65-2330RKSS
Hydrogen Sulfide Transmitter
Operator’s Manual
Part Number: 71-0425
Revision: 0
Released: 6/11/20

2 • 65-2330RKSS H2S Transmitter
WARNING
Read and understand this instruction manual before operating
transmitter. Improper use of the transmitter could result in bodily
harm or death.
Periodic calibration and maintenance of the transmitter is essential for
proper operation and correct readings. Please calibrate and maintain
this transmitter 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.

65-2330RKSS H2S Transmitter • 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 APARTICULAR 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 • 65-2330RKSS H2S Transmitter
Table of Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
H2S Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Junction Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Mounting the H2S Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Wiring the H2S Transmitter to a Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Introducing Incoming Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Setting the Zero Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Replacing Components of the H2S Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Preparing for Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Setting the Zero Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Setting the Response Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Returning to Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

65-2330RKSS H2S Transmitter • 5
Overview
This manual describes the 65-2330RKSS hydrogen sulfide (H2S) transmitter. This manual
also describes how to install, start up, maintain, and calibrate the transmitter when using it
with a gas monitoring controller. A parts list at the end of this manual lists replacement parts
and accessories for the H2S transmitter. See the controller operator’s manual for information
specific to the controller.
Specifications
WARNING: Do not use this product in a manner not specified in this instruction manual.
Table 1 lists specifications for the H2S transmitter.
WARNING: When using the 65-2330RKSS, you must follow the instructions and warnings
in this manual to assure proper and safe operation of the 65-2330RKSS and to
minimize the risk of personal injury. Be sure to maintain and periodically
calibrate the 65-2330RKSS as described in this manual.
Table 1: Specifications
Target Gas Hydrogen sulfide (H2S)
Sampling Method Diffusion
Signal Output 4 to 20 mA
Detection Range 0 to 100 PPM (parts per million)
Accuracy ± 5% of reading or ± 2 ppm H2S (whichever is greater)
Response Time 90% in 30 seconds
Operating Temperature -40°F to 104°F (-40°C to 40°C)

6 • 65-2330RKSS H2S Transmitter
Description
This section describes the components of the H2S transmitter. The H2S transmitter is a 4-20
mA type detector head. It consists of the H2S detector, amplifier, and junction box.
Figure 1: H2S Transmitter Component Location
ZERO SIG/PWR
Amplifier
TOXIC OXY
SPAN
S
Junction Box
H2S Detector

65-2330RKSS H2S Transmitter • 7
H2S Detector
The H2S detector consists of the detector housing body, detector housing cap, cap gasket, and
the plug-in sensor.
Figure 2: H2S 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 H2S 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 H2S detector to the amplifier. One of the wires is red and one of
the wires is black.
The housing includes a four-socket pattern. This socket pattern accepts the sensor’s four pins
to secure the sensor within the detector housing. A pre-amplifier, located between the sockets
and two interconnect wires, conditions the sensor’s signal before the signal reaches the
controller.
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 inside the housing cap seals against the face of the sensor when
the cap is screwed onto the housing body. A hydrophobic membrane on the outside of the cap
face keeps water and particulates away from the sensor face behind the cap. 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 H2S Sensor
The sensor is secured within the detector assembly by the housing cap. Through a series of
chemical and electrical reactions, the sensor produces an electrical output that corresponds to
the detection range of the transmitter.
Detector Housing Cap
Hydrophobic Membrane
Plug-In H2S Sensor
Detector Housing Body
Cap Gasket

8 • 65-2330RKSS H2S Transmitter
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: Amplifier Component Location
Controller Terminal Strip
The interconnect 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 H2S detector to the amplifier.
NOTE: The H2S detector is factory-wired to the detector terminal strip. See the Installation
section of this manual for all wiring procedures related to the transmitter.
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 (H2S
free) output during the start-up and calibration procedures. Turn the adjustment screw
clockwise to increase the zero output and counterclockwise to decrease the zero output.
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 response output
during the calibration procedure. Turn the adjustment screw clockwise to increase the output
and counterclockwise to decrease the output.
SPAN
TOXIC OXY SIG/PWR
S
ZERO
+ Test Point (Red)
100mV - 500mV
Range - Test Point (Black)
Zero Pot
Factory Adjust Pot
Span Pot Controller Terminal Strip
Detector Terminal Strip

65-2330RKSS H2S Transmitter • 9
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 100 mV 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.
Junction Box
The stainless steel, corrosion resistant junction box allows you to install the detector at a
mounting site that is remote from a controller, and it protects the amplifier and wiring
connections made to the amplifier. Two conduit hubs allow you to mount the detector to the
junction box and connect the wiring from the detector to a controller. An O-ring seals the
interface between the junction box cover and the junction box base.
The amplifier is factory installed in the junction box. 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 • 65-2330RKSS H2S Transmitter
Installation
This section describes procedures to mount the H2S transmitter in the monitoring environment
and wire the transmitter to a controller.
Mounting the H2S Transmitter
1. Select a mounting site that is representative of the monitoring environment. Consider the
following when you select the mounting site.
• Select a site where the transmitter is not likely to be bumped or disturbed. Make sure
there is sufficient room to perform start-up, maintenance, and calibration procedures.
• Select a site that is at normal breathing level.
Figure 4: Mounting the H2S Transmitter
2. At the monitoring site you select, hang or mount the junction box with the detector facing
down (see Figure 4).
.20 Dia. x .45
Slot, 2X
3/4 NPT
Female, 2X
2.40
3.15
3.66
H2S Detector
J-Box
3.34
1.10
6.63 max