RKI Instruments 65-2422RK-05 Manuel utilisateur

65-2422RK-05

Hydrogen Sulfide Transmitter

Operator’s Manual

Part Number: 71-0114RK

Revision: D

Released: 6/12/20

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2 • 65-2422RK-05 H2S 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.

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65-2422RK-05 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

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4 • 65-2422RK-05 H2S Transmitter

Table of Contents

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

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

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

H2S Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

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

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

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

Mounting the H2S Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Replacing Components of the H2S Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

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

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

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

Setting the Response Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

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

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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65-2422RK-05 H2S Transmitter • 5

Overview

This manual describes the hydrogen sulfide (H2S) 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 H2S transmitter.

Specifications

WARNING: Do not use this product in a manner not specified in this instruction manual.

Table 1 lists specifications for the H2S 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 65-2422RK-05, you must follow the instructions and warnings

in this manual to assure proper and safe operation of the 65-2422RK-05 and to

minimize the risk of personal injury. Be sure to maintain and periodically

calibrate the 65-2422RK-05 as described in this manual.

Table 1: Specifications

Target Gas Hydrogen sulfide (H2S)

Area Classification Explosionproof 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

Detection Range 0 to 100 PPM (parts per million)

Accuracy ± 5% of reading or ± 2 ppm H2S (whichever is greater)

H2S Detector Signal Output 0.3 mA at 0 ppm H2S nominal

2.5 mA at 100 ppm H2S nominal

Response Time 90% in 30 seconds

Operating Temperature -40°F to 104°F (-40°C to 40°C)

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6 • 65-2422RK-05 H2S Transmitter

Description

This section describes the components of the H2S transmitter. The transmitter consists of the

H2S detector, amplifier, and junction box.

Figure 1: H2S Transmitter Component Location

Test Point (+)

TP+

4/20

OXY

24V

Interconnect

Terminal Strip

Securing

Screw (2)

3/4 NPT Conduit Hub

SPAN

ZERO

OXY

TOXIC

Span

Potentiometer

Factory Set

Potentiometer

Zero

Potentiometer

Test Point (-)

BATT

TOXIC

Jumper Block

InstalledToToxic

Select Header

Hydrogen

Sulfide

Amplifier

Detector

Terminal Strip

Hydrogen Sulfide

Detector

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65-2422RK-05 H2S Transmitter • 7

H2S Detector

The H2S detector includes the detector housing body, detector housing cap, cap gasket, rubber

boot, spacer, and the plug-in H2S 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. 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.

Rubber Boot and Spacer

A rubber boot and spacer are installed between the detector housing cap and the sensor. They

help ensure that the detector remains plugged into the detector housing body.

Spacer

Rubber Boot

H2S Plug-inSensor

Flame

Arrestor

Guard

Detector

Housing Cap

Detector Housing Body

Cap Gasket

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8 • 65-2422RK-05 H2S Transmitter

Plug-In H2S Sensor

The sensor is secured within the sensor housing by the four pins. Through a series of chemical

and electrical reactions, the sensor produces an electrical output that is proportional to the

detector range of the transmitter.

Amplifier

The amplifier converts the electrical output from the sensor to a 4 to 20 mA signal (that is

proportional to the detection range) and transmits the signal to a gas monitoring controller.

The amplifier includes the amplifier type selector, detector terminal strip, interconnect

terminal strip, span pot, zero pot, and test points (see Figure 1).

Amplifier Type Selector

The amplifier type selector is near the bottom left corner of the amplifier. It is to the left of the

detector terminal strip and below the span potentiometer.

The amplifier included with the H2S transmitter is designed for use with RKI’s toxic gas and

oxygen transmitters. The amplifier type selector determines for which transmitter the

amplifier is intended. For H2S transmitters, a jumper block is installed over the TOXIC

selector (see Figure 1).

Detector Terminal Strip

The detector terminal strip is the four-point 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 amplifier. See the Installation section of this

manual for all wiring procedures related to the transmitter.

Interconnect Terminal Strip

The interconnect terminal strip is the four-point terminal strip near the top of the amplifier.

Use the interconnect terminal strip to connect the amplifier to a controller.

Span Pot

The span pot is on the left side of the amplifier. Of the three potentiometers, the span pot is

bottom most. Use the span pot to adjust the transmitter’s response output during the

calibration procedure.

Zero Pot

The zero pot is above the span pot. Use the zero pot to adjust the transmitter’s target gas-free

output during the start-up and calibration procedures.

CAUTION:The third potentiometer is factory-set. Do not adjust it.

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65-2422RK-05 H2S Transmitter • 9

Test Points

The test points (labeled TP- and TP+) are on the left and right side of the interconnect

terminal strip. The test points produce a 100 to 500 mV output that is proportional 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.

Junction Box

Use the junction box to install the H2S transmitter at a mounting site that is remote from the

controller. The junction box also protects the amplifier and wiring connections made to the

amplifier. Use the two 3/4 NPT conduit hubs to mount the detector to the junction box (bottom

hub) and connect wiring from the amplifier to the controller (top hub).

NOTE: The H2S detector and amplifier are factory-mounted to the junction box.

Use the junction box’s two mounting holes to mount the H2S transmitter to a vertical surface

at the monitoring site. Use the cover on the front of the junction box to access the interior of

the junction box.

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 where the target gas is likely to be found first.

NOTE: If your application does not require a specific mounting site, mount the transmitter at

approximately breathing level.

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10 • 65-2422RK-05 H2S Transmitter

Figure 3: Mounting the H2S Transmitter

If the H2S detector is mounted to the junction box, skip to step 5. If not, continue with step 2.

NOTE: The H2S detector is normally provided with a Killark HKB junction box and an HFC

lid rated explosion proof for Class I, Groups B, C, and D. This combination is shown

in Figure 2 above. Any junction box with an internal volume less than or equal to 69

cubic inches and rated explosion proof for ClassI, Groups B, C, and D may be used.

2. Remove the junction box cover.

3. Guide the two wires that extend from the top of the H2S detector through the bottom

conduit hub of the junction box.

4. Screw the H2S detector into the bottom conduit hub of the junction box.

5. At the monitoring site, use #10 screws through the junction box’s two mounting holes to

secure the junction box to a vertical surface.

CAUTION:Mount the H2S transmitter with the detector facing down (see Figure 2).

Ø .25 Mouting Holes (2X)

5.46

8.7 max

5.2

2.75

6.1

1.1

3.4 max

3/4 NPT Conduit Hub

3.94

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