RKI Instruments 65-2340RK User Manual

65-2340RK

Toxic Gas Transmitter

Operator’s Manual

Part Number: 71-0143RK

Revision: C

Released: 2/15/13

RKI Instruments, Inc.

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.

65-2340RK Toxic Gas 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 fr o m date of shipment
from RKI Instruments, Inc. Any parts found defective withi n tha t 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 ser v ice, and
which must be cleaned, repaired, or replaced on a routine basis. Examples of such items
are:

W arranty 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 , a nd we are not r esponsible for removal or r eplacement costs,
local repair costs, transportation costs, or contingent expenses incurred without our prior
approval.

a) Absorbent cartridges d) Batteries
b) Pump diaphragms and valves e) Filter elements
c) Fuses

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 inde mn ification for any accident or dama g e c au s e d b y t he op e ration of
this gas monitor, and our warranty is limited to the replacement of parts or our complete
goods.

65-2340RK Toxic Gas Transmitter

Table of Contents

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

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

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

Toxic Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Junction Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Mounting the Toxic Gas Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Wiring the Toxic Gas Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Introducing Incoming Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Setting the Zero Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Replacing Components of the Toxic Gas Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Preparing for Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Setting the Zero Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Setting the Response Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Returning to Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

65-2340RK Toxic Gas Transmitter

Overview

This manual describes the 65-2340RK toxic gas transmitter. This manual also describes
how to install, start up, maintain, and calibrate the toxic gas transmitter when used with a
gas monitoring controller. A parts list at the end of this manual lists replacement parts and
accessories for the toxic gas transmitter.

The 65-2340RK toxic gas transmitter can be used for various target gases which are listed
in Table 1 below. For a particular target gas, the part number of the toxic transmitter will
be of the format 65-2340RK-XXX. For example, 65-2340RK-NH3 is for ammonia (NH

detection.

Specifications

Table 1 lists specifications for the toxic gas transmitt er.

Table 1: Specifications

)

3

Target Gas 65-2340RK-ASH3: Ar sine (AsH

65-2340RK-CL2: Chlorine (Cl
65-2340RK-CL-10: Chlorine (Cl

)

3

)

2

)

2

65-2340RK-HCN: Hydrogen Cyanide (HCN)
65-2340RK-NH3: Ammonia (NH

65-2340RK-SO2: Sulphur Dioxide (SO
65-2340RK-P H3: Phosphine (PH

)

3

)

2

)

3

Sampling Method Diffusion
Detection Range AsH

: 0 - 1.50 ppm

3

: 0 - 3.00 ppm

Cl

2

Cl

: 0 - 10.0 ppm

2

HCN: 0 - 15.0 ppm

: 0 - 75.0 ppm

NH

3

: 0 - 6.00 ppm

SO

2

: 0 - 1.00 ppm

PH

3

Accuracy ± 10% of reading or ± 5% of full scale (whichever is greater)
Signal Output 4 to 20 mA
Response Time • Cl

and NH3: T90 in 90 seconds

2

• All others: T90 in 45 seconds

Operating Temperature &
Humidity

W ARNING: When using the 65-2340RK, you must follow the instructions and warnings

• 14°F to 104°F (-10°C to 40°C)

• 20% to 90% Relative Humidity

in this manual to assure proper and safe operation of the 65-2340RK and to
minimize the risk of personal injury. Be sure to maintain and period ically
calibrate the 65-2340RK as described in this manual.

65-2340RK Toxic Ga s Tra nsm itter • 1

Description

FactoryAdjustPot

Co ntro l lerTer m inal Strip

Amplifier

Mounting Screw

Detector Terminal Strip

Black - Test Point

Red +Test Point

J-Box

Span Pot

Zer o Pot

ZERO

SPAN

TOXIC OXY

SIG/PWR

S

Toxic Detector

This section describes the components of the toxic gas transmitter. The toxic gas
transmitter is a 4 - 20 mA type detector head. It consists of the toxic detector, amplifier,
and juncti on box.

2 • 65-2340RK Toxic Gas Transmitter

Figure 1: Toxic Transmitter Component Location

Toxic Detector

Splas h Guard
(removable)

Sensor
(different for each detector type)

Detect or Ho usin g
Cap

Cap Gasket

Det e c tor H o us ing Body
(different for each detector type)

The toxic detector consists of the detector housing body, detector housing cap,
splashguard, cap gasket, and the plug -in sensor.

Figure 2: Toxic 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 housi ng to screw the toxic 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 toxic detector to the amplifier. One of the
wires is black and one of the wires is color coded depending on the detector type. See
Figure 4 on page 7 for the color code assignments.

The housing body includes a 12 position connector at the bottom of the housing body. The
plug-in sensor mates to this connector. A pre-amplifier located between the connector and
the two interconnect wires conditions the sensor’s sign al before the signal reaches the
controller . Ea ch plug-in sensor type (Cl

there is a different detector housing body for each gas type.

Housing Cap, Cap Gasket, & Splashguard

The housing cap screws onto the detector housing. It retains the plug-in sensor and
protects it from damage. A removable splashguard is screwed onto the detector cap to
protect the sensor from impact damage, direct water spray, and splashing. Unscrew the
detector cap to access the sensor for maintenance or replacement. A cap gasket seals the
interface between the housing and cap.

Plug-In Sensor

The plug-in sensor is secured in the detector assembly by the housing cap. There is a
different sensor for each target gas. Through a series of chemical and electrical reactions,
the sensor produces an electrical output that corresponds to the detection range of the
sensor.

Amplifier

The amplifier converts the electrical output from the detector to a 4 to 20 mA signal that

for example) requires a diffe rent pr e-amplifier, so

2

65-2340RK Toxic Ga s Tra nsm itter • 3