RKI Instruments 65-2330RK Manuale utente

RKI Instruments, Inc.

www.rkiinstruments.com

65-2330RK

Hydrogen Sulfide Transmitter

Operator’s Manual

Part Number: 71-0197RK

Revision: A

Released: 6/11/20

2 • 65-2330RK H2S Transmitter

WARNING

Read and understand this instruction manual before operating

transmitter. Improper use of the transmitter could result in bodily

harm or death.

Periodic calibration and maintenance of the transmitter is

essential for proper operation and correct readings. Please

calibrate and maintain this transmitter 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.

65-2330RK 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

4 • 65-2330RK H2S Transmitter

Table of Contents

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

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

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

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

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

Junction Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

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

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

Wiring the H2S Transmitter to a Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Introducing Incoming Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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

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

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

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Replacing Components of the H2S Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

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

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

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

Setting the Zero Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

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

Returning to Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

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

65-2330RK H2S Transmitter • 5

Overview

This manual describes the 65-2330RK hydrogen sulfide (H2S) transmitter. This manual also

describes how to install, start up, maintain, and calibrate the transmitter when using it with a

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

accessories for the H2S transmitter. See the controller operator’s manual for information

specific to the controller.

Specifications

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

Table 1 lists specifications for the H2S transmitter.

WARNING: When using the 65-2330RK, you must follow the instructions and warnings in

this manual to assure proper and safe operation of the 65-2330RK and to

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

calibrate the 65-2330RK as described in this manual.

Table 1: Specifications

Target Gas Hydrogen sulfide (H2S)

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)

Response Time 90% in 30 seconds

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

6 • 65-2330RK H2S Transmitter

Description

This section describes the components of the H2S transmitter. The H2S transmitter is a 4-20

mA type detector head. It consists of the H2S detector, amplifier, and junction box.

Figure 1: H2S Transmitter Component Location

Controller Terminal Strip

Amplifier

Detector Terminal Strip

J-Box

H2S Detector

SIG/PWR

SPAN

ZERO

100 mV- 500 mV

Range -TestPoint(Black)

+ Test Point (Red)

Factory Adjust Pot

Span Pot

Zero Pot

TOXIC OXY

65-2330RK H2S Transmitter • 7

H2S Detector

The H2S detector consists of the detector housing body, detector housing cap, cap gasket, and

the plug-in 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. A foam gasket inside the housing cap seals against the face of the sensor when

the cap is screwed onto the housing body. A hydrophobic membrane on the outside of the cap

face keeps water and particulates away from the sensor face behind the cap. 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.

Plug-In H2S 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.

Detector Housing Cap

Hydrophobic Membrane

Plug-In H2S Sensor

Detector Housing Body

Cap Gasket

8 • 65-2330RK H2S Transmitter

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 H2S detector to the amplifier.

NOTE: The H2S detector is factory-wired to the detector terminal strip. See the Installation

section of this manual 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 (H2S

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 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 transmitter’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 H2S 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

65-2330RK H2S Transmitter • 9

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 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 that is at normal breathing level.

Figure 3: Mounting the H2S Transmitter

3.10

.75 .38

Rubber

Spacers

3/4 NPT

Female

3.65

1 1/2-20 Thread for

Calibration Cup

J-Box

H2S Detector

6.8 Max

10 • 65-2330RK H2S Transmitter

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

down (see Figure 3).

Wiring the H2S 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.

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 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 H2S 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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