RKI Instruments 65-2340RK Manuale utente

RKI Instruments, Inc.

www.rkiinstruments.com

65-2340RK

Toxic Gas Transmitter

Operator’s Manual

Part Number: 71-0143RK

Revision: G

Released: 6/12/20

2 • 65-2340RK Toxic Gas Transmitter

WARNING

Read and understand this instruction manual before operating detec-

tor. 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 frequen-

cies for most applications are between 3 and 6 months, but can be

required more often or less often based on your usage.

65-2340RK Toxic Gas 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 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 • 65-2340RK Toxic Gas Transmitter

Table of Contents

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Toxic Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Junction Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Mounting the Toxic Gas Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Wiring the Toxic Gas Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Introducing Incoming Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Setting the Zero Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

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

Replacing Components of the Toxic Gas Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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

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

Preparing for Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Setting the Zero Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Setting the Response Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Returning to Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

65-2340RK Toxic Gas Transmitter • 5

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 (NH3)

detection.

Specifications

Table 1 lists specifications for the toxic gas transmitter.

WARNING: When using the 65-2340RK, you must follow the instructions and warnings 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 periodically

calibrate the 65-2340RK as described in this manual.

Table 1: Specifications

Target Gas 65-2340RK-ASH3: Arsine (AsH3)

65-2340RK-CL2: Chlorine (Cl2)

65-2340RK-CL-10: Chlorine (Cl2)

65-2340RK-HCN: Hydrogen Cyanide (HCN)

65-2340RK-NH3: Ammonia (NH3)

65-2340RK-SO2: Sulphur Dioxide (SO2)

65-2340RK-PH3: Phosphine (PH3)

Sampling Method Diffusion

Detection Range AsH3: 0 - 1.50 ppm

Cl2: 0 - 3.00 ppm

Cl2: 0 - 10.0 ppm

HCN: 0 - 15.0 ppm

NH3: 0 - 75.0 ppm

SO2: 0 - 6.00 ppm

PH3: 0 - 1.00 ppm

Accuracy ± 10% of reading or ± 5% of full scale (whichever is greater)

Signal Output 4 to 20 mA

Response Time •Cl

2and NH3: T90 in 90 seconds

• All others: T90 in 45 seconds

Operating Temperature &

Humidity • 14°F to 104°F (-10°C to 40°C)

• 20% to 90% Relative Humidity

6 • 65-2340RK Toxic Gas Transmitter

Description

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 junction box.

Figure 1: Toxic Transmitter Component Location

SPAN

SIG/PWR

ZERO

TOXIC OXY S

Amplifier

J-Box

Toxic Detector

65-2340RK Toxic Gas Transmitter • 7

Toxic Detector

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 housing 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 5 on page 12 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 signal before the signal reaches the controller.

Each plug-in sensor type (Cl2 for example) requires a different pre-amplifier, so 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

Splash Guard

(removable)

Sensor

(different for each detector type)

Detector Housing

Cap

Cap Gasket

Detector Housing Body

(different for each detector type)

8 • 65-2340RK Toxic Gas Transmitter

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

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 detector terminal strip, controller terminal strip, zero

pot, span pot, and test points (see 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 wire the transmitter to a controller.

Detector Terminal Strip

The detector terminal strip is a four position plug-in style terminal strip located below the

controller terminal strip. Two of the positions are for use with an oxygen sensor and are not

used in the toxic gas transmitter. Use the two detector terminal strip positions that are labelled

“TOXIC” to connect the detector to the amplifier.

NOTE: The detector is factory-wired to the detector terminal strip. See “Wiring the Toxic Gas

Transmitter to a Controller” on page 11 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 (fresh

air) 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.

Controller Terminal Strip

Detector Terminal Strip

Mounting Screw

SIG/PWR

SPAN

Span Pot

Factory Adjust Pot

Zero Pot

ZERO

Red + Test Point

Black - Test Point

TOXIC OXY

65-2340RK Toxic Gas 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 gas response

output during the calibration procedure. Turn the adjustment screw clockwise to increase the

span output and counterclockwise to decrease the span output.

CAUTION:The amplifier includes an additional potentiometer. It is factory-set. Do not adjust

it.

Test Points

The test points 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 amplifier’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

Use the junction box to install the transmitter at a mounting site that is remote from the

controller. The 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 cover on the front of the junction box to access the interior of the junction

box. The detector and amplifier are 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 and ensure that there is enough room to install a calibration cup on the

detector during calibration.

Installation

This section describes procedures to mount the toxic gas transmitter in the monitoring

environment and wire the transmitter to a controller.

Mounting the Toxic Gas 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 where the target gas is likely to be found first.

10 • 65-2340RK Toxic Gas Transmitter

Figure 4: Mounting the Toxic Gas Transmitter

2. At the monitoring site you select, hang or mount the junction box with the detector facing

down (see Figure 4).

3.65 Rubber

Spacer, 3X

3/4 NPT

Conduit Hub 0.38

.75

2.70

Junction

Box

9.60 Max

Toxic

Detector

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