RKI Instruments 65-2428 User manual

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65-2428

Hydrogen Sulfide Detector

Operator’s Manual

Part Number: 71-0344

Revision: P1

Released: 10/20/14

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65-2428 H2S Detector

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.

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65-2428 H2S Detector

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

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65-2428 H2S Detector

Table of Contents

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

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

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

Detector Housing, Housing Cap, & Cap Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Rubber Boot and Spacer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Mounting the H2S Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Wiring the H2S Detector to a Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Introducing Incoming Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Setting the Zero Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Replacing Components of the H2S Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Preparing for Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Setting the Zero Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Setting the Response Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

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65-2428 H2S Detector • 1

Overview

This manual describes the 65-2428 hydrogen sulfide (H2S) detector. This manual also

describes how to install, start up, maintain, and calibrate the detector when it is used with

a gas monitoring controller. A parts list at the end of this manual lists replacement parts

and accessories for the H2S detector.

Specifications

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

manual.

Table 1 lists specifications for the H2S detector.

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 65-2428, you must follow the instructions and warnings in

this manual to assure proper and safe operation of the 65-2428 and to

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

calibrate the 65-2428 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).

Sampling Method Diffusion

H2S Detector Signal Output 0.3 mA at 0 ppm H2S nominal

2.5 mA at 100 ppm H2S nominal

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)

* The area classification only applies if the detector is installed using a junction box with an internal

volume less than or equal to 69 cubic inches and rated explosion proof for Class I, Groups B, C, and D. The detector is not explosion proof

if it is installed in a non-explosion proof enclosure, such as in a conduit hub of a controller like the Beacon 200 or Beacon 800.

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2 • 65-2428 H2S Detector

Description

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

detector housing body, housing cap, cap gasket, rubber boot, spacer, and the H2S sensor.

Figure 1: H2S Detector Component Location

Detector Housing Body, Housing Cap, & Cap Gasket

The detector housing body protects the sensing components within the housing. Use the

mounting threads at the top of the housing to screw the H2S detector into a 3/4” NPT hub.

Use the removable cap near the bottom of the housing to access the sensor for

maintenance or replacement. The cap protects the sensor from damage and includes a

flame arrestor which contains any sparks which may occur within the detector housing. A

cap gasket seals the interface between the housing and cap. A flame arrestor guard is

permanently bonded to the cap.

Two wires extend from the top of the detector housing. Use these wires to connect the H2S

detector to a controller. 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.

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.

Sensor

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

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

detection range of the detector.

Spacer

Rubber Boot

H2S Plug-inSensor

Flame

Arresto

Guard

Detector

Housing Cap

Detector Housing Body

Cap Gasket

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65-2428 H2S Detector • 3

Installation

NOTE: Normally, the H2S detector is shipped already installed in one of the bottom

conduit hubs of a controller and factory wired to the controller. If your detector is

already installed in a controller, use this section for reference only.

This section describes procedures to mount the H2S detector in the monitoring

environment and wire the detector to a controller.

Mounting the H2S Detector

1. Whether you will mount the detector directly to a controller or to a junction box, 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 detector 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 detector

at approximately breathing level.

Figure 2: Outline & Mounting Dimensions

3/4 NPT

Shrink Tubing

1.62 Flats for

Wrench

2.25 Ref

1-1/2-20 For Calibration Cup

9.75 Ref

0.75

Ø 1.75

3.48

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4 • 65-2428 H2S Detector

2. At the monitoring site, mount the detector in one of the following two ways:

• Screw the detector’s 3/4” NPT mounting thread into an empty conduit hub on a

controller.

• Screw the detector’s 3/4” NPT mounting thread into an appropriately rated

junction box.

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

NOTE: If the mounting site requires the detector installation to be explosion proof, you

must install the detector in a junction box with an internal volume less than or

equal to 69 cubic inches and rated explosion proof for Class I, Groups B, C, and

Wiring the H2S Detector to a Controller

WARNING: Always verify that the power source is OFF before you make wiring

connections.

1. Turn off the controller.

2. Turn off or unplug power to the controller.

3. If the detector is mounted remotely from a controller using an explosion proof

junction box, proceed to step 4.

If the detector is mounted directly to a controller, connect the detector’s red and black

wires to the appropriate controller detector terminals and skip to the Startup Section.

4. Remove the junction box cover.

WARNING: To maintain the explosion proof classification of the H2S detector/junction

box combination, a conduit seal must be used within 18 inches of the

junction box conduit hub used for wiring to the controller.

5. Guide a two-conductor, shielded cable or two wires in conduit through an unused

conduit hub of the junction box.

6. Connect the two wires to the detector using an appropriate terminal block.

CAUTION: If using shielded cable, leave the drain wire insulated and disconnected at the

detector. You will connect the opposite end of the cable’s drain wire at the controller.

7. Secure the junction box cover to the junction box.

8. Route the cable or wires leading from the H2S detector through one of the conduit

hubs at the controller housing.

CAUTION: Do not route power and detector wiring through the same conduit hub. The power

cable may disrupt the transmission of the detector signal to the controller.

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65-2428 H2S Detector • 5

9. Connect the wires to the applicable controller terminal strip. See the controller

operator’s manual and the controller’s detector head specification sheet for the H2S

detector. .

Figure 3: Wiring the H2S Detector to a Controller

10. If shielded cable is used, connect the cable’s drain wire to an available chassis (earth)

ground at the controller. RKI controllers typically have a ground stud that can be used

to ground the cable’s drain wire.

11. Reinstall the junction box cover.

Black Red

Controller H2S Detector Terminals

(typical terminal designation shown)

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