RKI Instruments 65-2333 Manuale utente

RKI Instruments, Inc.

www.rkiinstruments.com

65-2333

Hydrogen Cyanide Transmitter

Operator’s Manual

Part Number: 71-0265

Revision: P1

Released: 1/17/23

2• 65-2333 Hydrogen Cyanide Transmitter Operator’s Manual

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.

65-2333 Hydrogen Cyanide Transmitter Operator’s Manual • 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:

• Absorbent cartridges

•Fuses

• Pump diaphragms and valves

•Batteries

• Filter elements

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. INNO

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.

4• 65-2333 Hydrogen Cyanide Transmitter Operator’s Manual

Table of Contents

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

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

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

HCN Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

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

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

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

Mounting the HCN Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Wiring the HCN Transmitter to a Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Introducing Incoming Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Setting the Zero Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

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

Replacing Components of the HCN Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

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

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

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

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

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

65-2333 Hydrogen Cyanide Transmitter Operator’s Manual Overview • 5

Overview

This manual describes the 65-2333 explosion-proof hydrogen cyanide (HCN) 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 HCN transmitter.

Specifications

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

Table 1 lists specifications for the HCN 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 65-2333, you must follow the instructions and warnings in this

manual to assure proper and safe operation of the 65-2333 and to minimize the

risk of personal injury. Be sure to maintain and periodically calibrate the 65-

2333 as described in this manual.

Table 1: Specifications

Target Gas Hydrogen cyanide (HCN)

Area Classification Explosion-proof 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 15.0 ppm (parts per million)

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

HCN Detector Signal

Output

0.3 mA at 0 ppm HCN nominal

2.5 mA at 15.0 ppm HCN nominal

Response Time 90% in 30 seconds

Operating Temperature -4°F to 104°F (-20°C to 40°C)

6• Description 65-2333 Hydrogen Cyanide Transmitter Operator’s Manual

Description

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

HCN detector, amplifier, and junction box.

Figure 1: HCN Transmitter Component Location

Amplifier

Controller Terminal Strip

SIG/PWR

HCN Detector

J-Box

Detector Terminal Strip

Factory Adjust Pot

Span Pot

Zero Pot

ZERO

SPAN

+ Test Point (Red)

- Test Point (Black)

TO XIC OXY

65-2333 Hydrogen Cyanide Transmitter Operator’s Manual Description • 7

HCN Detector

The HCN detector consists of the detector housing body, detector housing cap, cap gasket, rubber

boot, spacer, and the plug-in sensor.

Figure 2: HCN 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 HCN 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 HCN 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

Flame

Arrestor

Guard

Detector

Housing Cap

Detector Housing Body

Cap Gasket

HCN Plug-in Sensor

VersaporR Membrane

8• Description 65-2333 Hydrogen Cyanide Transmitter Operator’s Manual

Plug-In HCN 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. A VersaporR membrane is installed on the sensor face for

added protection from water and particulate contaminants.

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 1).

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 HCN detector to the amplifier.

NOTE: The HCN detector is factory-wired to the detector terminal strip. See “Installation” on

page 9 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 1). Use a small flat

blade screwdriver to turn the zero pot’s adjustment screw and adjust the amplifier’s zero (HCN

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 1). 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.

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 1). The test points

produce a 100mV 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.

65-2333 Hydrogen Cyanide Transmitter Operator’s Manual Installation • 9

Junction Box

Use the junction box to install the HCN 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. 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 HCN transmitter in the monitoring environment

and wire the detector to a controller.

Mounting the HCN 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 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 that is at normal breathing level.

Figure 3: Mounting the HCN Detector

.38

.75

3.10

J-Box

3/4 NPT

Female

Rubber

Spacers

3.65

HCN Detector

11/2-20Threadfor

Calibration Cup

8.18 Max

10 • Installation 65-2333 Hydrogen Cyanide Transmitter Operator’s Manual

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

down (see Figure 3).

Wiring the HCN Transmitter to a Controller

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

connections.

1. Turn off the controller.

2. Turn off power to the controller.

3. Remove the junction box cover.

4. The detector leads are factory wired. Verify that the detector leads are wired to the amplifier’s

detector terminal strip as shown in Figure 4.

5. To gain access to a plug-in terminal strip for wiring, pull it out of its socket by grasping the

terminal strip and pulling. The detector terminal strip is keyed so that the controller and

detector terminal strips cannot be reversed inadvertently.

WARNING: To maintain the explosion proof classification of the HCN 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.

6. Guide a two-conductor, shielded cable, or two wires in conduit through the top conduit hub of

the junction box.

7. Pull out the controller terminal strip and connect the two wires to the terminal strip as follows

(see Figure 4).

• Connect the positive wire to the terminal labeled SIG/PWR “+” terminal.

• Connect the signal wire to the terminal labeled SIG/PWR “S” terminal.

CAUTION: If a shielded cable is used, leave the cable shield’s drain wire insulated

and disconnected at the transmitter. You will connect the opposite end of

the cable’s drain wire to the controller’s chassis (earth) ground.

8. Reinstall the controller terminal strip into its socket.

9. Secure the junction box cover to the junction box.

10. Route the cable or wires leading from the HCN transmitter through one of the conduit hubs at

the controller housing.

CAUTION: Do not route power and transmitter wiring through the same controller

conduit hub. The power cable may disrupt the transmission of the

transmitter signal to the controller.

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