RKI Instruments 30-0954-265-01 Owner's manual

RKI Instruments, Inc.

www.rkiinstruments.com

30-0954-265-01

Sample Draw Aspirator Adapter

Operator’s Manual

Part Number: 71-0464

Revision: 0

Released: 5/29/20

2 30-0954-265-01 Operator’s Manual

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

30-0954-265-01 Operator’s Manual 3

Table of Contents

Chapter 1: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

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

About the 30-0954-265-01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Chapter 2: Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Beacon 110 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Aspirator Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Chapter 3: Installation & Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Mounting the 30-0954-265-01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Making Tubing Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Wiring the 30-0954-265-01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Chapter 4: Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4 - 20 mA Signal Output Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Viewing and Resetting Min/Max Readings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Battery Charging (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Beacon 110 Alarm Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Chapter 5: Configuration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Viewing & Changing Beacon 110 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

4 30-0954-265-01 Operator’s Manual

Chapter 6: Input Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Selecting the Detector Head Input and Gas Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Chapter 7: Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Calibration Frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Calibration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Replacing the Infrared Methane Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Blowback Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Setting the Drain Fault Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Replacing the Water Trap’s Filter Element. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Replacing the Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Trouble Shooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Appendix A: Control Button Quick Reference Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

30-0954-265-01 Operator’s Manual 5

Chapter 1: Introduction

Overview

This chapter briefly describes the 30-0954-265-01. This chapter also describes the 30-0954-265-01

Operator’s Manual (this document). Table 1 at the end of this chapter lists the specifications for the

30-0954-265-01.

About the 30-0954-265-01

The 30-0954-265-01 is intended to detect methane and consists of a Beacon 110 and an aspirator

adapter with an infrared methane detector head. The Beacon 110 is mounted to the aspirator adapter.

All user adjustable parameters may be accessed using push button switches at the Beacon 110.

The Beacon 110 displays the current gas reading on an LCD display which is visible through a window

in the door. It includes audible and visual alarms that warn you of hazardous gas conditions. The alarm

circuit includes two levels of gas alarms. The fail circuit alerts you to failures in the infrared methane

detector head, aspirator adapter, or Beacon 110. The Beacon 110 provides a 4 - 20 mA signal

proportional to the target gas reading for use by a recording device. Three sets of relay contacts, two

controlled by the gas alarms and one by the fail alarm, rated at 10 amps 115 VAC, 10 amps 220 VAC,

and 10 amps 30 VDC are available for controlling devices such as lights or horns or for controlling

higher rated relays.

Three operating modes in the Beacon 110 allow you to display and change setup and calibration

settings and change the detector head input type. They are Calibration Mode, Configuration Mode, and

Input Mode.

About this Manual

The 30-0954-265-01 Operator’s Manual uses the following conventions for notes, cautions, and

warnings.

NOTE: Describes additional or critical information.

CAUTION: Describes potential damage to equipment.

WARNING: Describes potential danger that can result in injury or death.

6 30-0954-265-01 Operator’s Manual

Specifications

Table 1 lists specifications for the 30-0954-265-01.

Table 1: 30-0954-265-01 Specifications

Target Gas Methane (CH

4

)

Detection Range 0 - 100% LEL

Response Time 90% in 45 seconds

Accuracy ±5% of reading or ±2% of full scale (whichever is greater)

Input Power 100/115/220V ~ ±10%, 50/60Hz, 0.2/0.2/0.1A

or

24 V ± 10%, 0.5A VDC

Construction (housing) Fiberglass/polyester with lexan window (NEMA 4X)

Dimensions 8.5 in. H x 6.5 in. W x 4.5 in. D

(216 mm H x 165 mm W x 108 mm D)

Weight 4.2 lbs.

Safety/Regulatory

(Beacon 110 only)

C US

186718

Environmental Conditions • For indoor or outdoor locations (Type 4X)

• -20°C to 50°C (-4°F to 122°F) ambient

• Maximum relative humidity of 80%

• Main supply voltage fluctuations not exceeding ± 10% of nominal

• DC supply voltage fluctuations not exceeding ±10% of nominal

• Overvoltage Category II, Pollution Degree 2

Relays • Relay contacts rated for 10A @ 115/220V~ resistive or 10A @ 30V

resistive

• SPDT Form C

User Controls • Three push button control switches

• One ON/OFF toggle switch

• One push button reset switch

Signal Output • 4 to 20 mA, 500 ohms impedance max

Maximum Compressed Air Supply

Pressure

140 PSI

Outlet Pressure to Aspirator 5 - 50 PSI adjustable (determined by required flow rate)

Recommended Total Flow Rate 3 SCFH (standard cubic feet per hour)

Low Flow Setpoint 1.6 SCFH (standard cubic feet per hour)

30-0954-265-01 Operator’s Manual 7

WARNING: When using the 30-0954-265-01, you must follow the instructions and warnings in

this manual to assure proper and safe operation of the 30-0954-265-01 and to

minimize the risk of personal injury. Be sure to maintain and calibrate the 30-0954-

265-01 as described in this manual.

8 30-0954-265-01 Operator’s Manual

Chapter 2: Description

Overview

This chapter describes external and internal components of the 30-0954-265-01 gas monitor.

Figure 1: 30-0954-265-01 Components

Aspirator AdapterBeacon 110

FA IL AL M 2AL M 1

BEACON 110

GAS MONITOR

RESET

+

-

Infrared Methane

Detector Head

30-0954-265-01 Operator’s Manual 9

Beacon 110

External Description

This section describes the housing and all external components of the Beacon 110. For the purposes of

this description, the housing door is considered the front of the monitor.

Housing

The Beacon 110’s fiberglass housing is weather- and corrosion-resistant. It is suitable for installation

where general purpose equipment is in use. The housing door is hinged on the left side and is secured

by two latches on the right side. The display screen and status lights are visible through a window in

the housing door. Four mounting feet are attached to the back of the housing (one at each corner). The

mounting feet allow installation to a vertical surface. Two conduit hubs on the bottom of the housing

are for external wiring connections. The infrared methane detector head is factory wired through the

right hub.

CAUTION: To avoid electrical interference, do not route detector and power wiring through the

same conduit hub.

Buzzer

The buzzer is on the bottom center of the housing in front of the reset switch. The buzzer sounds

audible alarms to warn you of gas alarms and instrument failures.

Reset Switch

The reset switch is on the bottom of the housing behind the buzzer. The reset switch serves three

functions:

• You can reset the alarm circuits for “latched” alarms after an alarm 1 or alarm 2 condition passes.

• You can silence the buzzer during an alarm 1 or an alarm 2 condition. You cannot silence a fail

condition.

• You can display and reset the minimum and maximum readings that the Beacon 110 has

experienced since the last min/max reset or startup.

10 30-0954-265-01 Operator’s Manual

Internal Description

This section describes the internal components of the Beacon 110.

Figure 2: Beacon 110 Component Location

Main Printed Circuit Board (PCB)

The main PCB is mounted inside the housing. The main PCB includes the power supply, terminal

strips, relays, fuses, and power switch.

Power Supply

The power supply is located on the left side of the main PCB. It takes AC line voltage supplied to the

Beacon 110 and converts it to 24 VDC which is used to run the Beacon 110.

Relay (3X)

DC Power

Polyfuse

DP Switch

Terminal

Strip

Detector/

Transmitter

Terminal

Strips

Main PCB

Conduit Hubs (2X)

Control PCB

Strobe Terminal Strip

Control

Terminal

Strip

Alarm Terminal

Strip

AC IN

Terminal

Strip

Power

Switch

Power Supply

AC Fuses

Reset Switch

Buzzer

30-0954-265-01 Operator’s Manual 11

Terminal Strips

The Beacon 110 includes terminal strips for external and factory wiring connections. See “Wiring the

30-0954-265-01” on page 21 for detailed wiring procedures.

• AC In Terminal Strip. The AC in terminal strip is a 3-point terminal strip located in the lower left

corner of the main PCB. It facilitates wiring from the AC power source. Table 2 lists the function

of each terminal.

• Alarm Terminal Strip. The 9-point alarm terminal strip is located along the bottom edge of the

main circuit board to the right of the AC In Terminal Strip (see Figure 2). It facilitates wiring

external alarm devices (horn, strobe, etc.) to the alarm relay contacts and includes common (C),

normally closed (NC) and normally open (NO) terminals for fail, alarm 1, and alarm 2.

• Controller Terminal Strip. The 8-point controller terminal strip is located along the bottom edge

of the main circuit board to the right of the alarm terminal strip (see Figure 2). The controller

terminal strip facilitates various internal and external wiring connections. Table 3 lists the function

of each terminal.

• Detector/Transmitter Terminal Strips. Three adjacent terminal strips are located along the right

side of the main circuit board above the controller terminal strip (see Figure 2). These three

terminal strips facilitate wiring connections to a detector or a 4 - 20 mA transmitter. The lower 4-

point terminal strip is labelled LEL and is used to wire a combustible detector. The middle 2-point

terminal strip is labelled Oxy and is used to wire an oxygen detector. The top 3-point terminal strip

is labelled AMP and is used to wire 4 - 20 mA transmitters or direct connect preamp type

detectors. Only one detector head at a time may be wired to the Beacon 110. The infrared methane

detector head is factory wired to the LEL terminal strip.

Table 2: Terminal Assignments for the AC In Terminal Strip

Terminal Connects to:

L Hot (line) wire from AC power source.

N Neutral wire from AC power source.

GEarth ground

Table 3: Terminal Assignments for the Controller Terminal Strip

Terminal Connects to:

Alarm Buzzer + & - Factory installed buzzer (factory-wired)

Alarm Reset (2) Reset switch (factory-wired)

4 - 20 mA Output + + connection of 4 - 20 mA output

4 - 20 mA Output - - connection of 4 - 20 mA output

EXT DC (24V BATT) +

+ connection from 24 VDC power source

1

(or 24 V backup battery)

EXT DC (24V BATT) -

- connection from 24 VDC power source

1

(or 24 V backup battery)

1

If DC power is used as the primary power source, do not make wiring connections to the AC ter-

minal strip.

12 30-0954-265-01 Operator’s Manual

Ground Stud

The threaded ground stud is used for making connections to earth ground. It is connected through the

main PCB to the G (ground) terminal on the AC in terminal strip. A kep nut on the stud may be

removed for installation of one or more lugs to make wiring connections. This stud is typically used to

connect the shield drain wire of shielded cable to earth ground at the Beacon 110.

Relays

The Beacon 110 includes three alarm relays located above the alarm terminal strip. They are from left

to right Fail, Alarm 1, and Alarm 2. The relays are form C, single-pole, double-throw (SPDT) and

rated for 10 amps at 250 VAC (resistive).

NOTE: You can select normally energized (N.EN) or normally de-energized (N.DE-EN) settings for

the alarm 1 and alarm 2 relays. See “Chapter 5: Configuration Mode” on page 35.

The fail relay is factory set as normally energized and is not user adjustable.

AC & DC Circuit Protection

Two AC fuses are used in the Beacon 110. The two fuses are located on the left side of the main PCB,

above the AC power terminal strip and below the power supply. They cut off the incoming AC power

in the event of a short circuit or other electrical fault which causes a high current draw in the Beacon

110. They are housed in vertical fuse holders and are held in the holder by a quarter turn cover. They

are labelled as F1 (left fuse) and F2 (right fuse) on the PCB silk-screen and are rated at 3 A, 250 V.

A polyswitch is used to protect the DC power input. It is located to the right of the relays and is

labelled on the PCB silkscreen as PS3. In the event of a short circuit or other electrical fault which

causes a high current draw in the Beacon 110, the polyswitch will interrupt the DC power if the unit is

powered from DC. When the fault situation is corrected, the polyswitch resets and the unit will

continue to operate. The polyswitch is not user serviceable.

Power Switch

The power switch is located to the right of the power supply and above the relays (see Figure 2). The

power switch turns the incoming AC power source on and off at the Beacon 110. When the switch is

up, the power switch is on.

CAUTION: The DC power input has no on/off switch and is not affected by the position of the power

switch.

30-0954-265-01 Operator’s Manual 13

Control PCB

The LCD display and control buttons are located on the control PCB. It is installed on the main PCB

with three standoffs. The control PCB is connected to the main PCB with the display cable which is a

ribbon cable terminated with 20 position rectangular connectors on each end. The display cable

connects to the control PCB on the back of the top edge and to the main PCB directly below the control

PCB.

Figure 3: Control PCB Component Location

LCD Display

The LCD display is located at the top of the control PCB. It indicates the current gas reading and

displays messages and parameters in the Beacon 110’s operating modes.

Contrast Potentiometer

The contrast potentiometer is located to the right of the LCD display. It is used to adjust the contrast of

the LCD. If the background of the LCD appears so dark that the characters are not visible or if the

characters are too dim, turn the adjustment screw on the potentiometer clockwise or counterclockwise

until the desired visibility is obtained.

Control Buttons

The Beacon 110 includes three push button switches that allow you to enter the Beacon 110’s

operating modes, navigate through the modes, update settings, and save changes to the settings. The

push button switches are located along the bottom edge of the control PCB (see Figure 3). The UP/

YES button is on the left, the DOWN/NO button is in the middle, and the ENTER button is on the

right.

UP/YES DOWN/NO

ENTER

F

A1 A2

Control Switches

Fail LED

Alarm 1 LED

Alarm 2 LED

LCD Display

Contrast

Potentiometer

14 30-0954-265-01 Operator’s Manual

Status LEDs

The Beacon 110 includes three active status LEDs that are located above the display (see Figure 2).

Two LEDs, labelled RX and TX, to the right of those described below, are not active.

• Fail LED

The fail LED turns on when the Beacon 110 is experiencing a fail condition. A fail condition can

be caused by a detector failure or low detector signal.

• Alarm 1 LED

The alarm 1 LED is on when the Beacon 110 is experiencing an alarm 1 condition.

• Alarm 2 LED

The alarm 2 LED is on when the Beacon 110 is experiencing an alarm 2 condition.

Table 4: Beacon 110 Control Button Functions

Switch Function

UP/YES • Saves settings

• Changes the displayed setting

• Enters Calibration Mode

• Enters Input Mode (press with DOWN/NO button)

• Enters Configuration Mode (press with ENTER button)

DOWN/NO • Cancels setting changes

• Changes the displayed setting

• Enters Input Mode (press with UP/YES button)

• Displays the Information Screen

ENTER • Initiates operations

• Enters Configuration Mode (press with UP/YES button)

• Accepts displayed parameters

30-0954-265-01 Operator’s Manual 15

Aspirator Adapter

External Description

The sample draw aspirator adapter uses compressed air flowing through a venturi to draw air into a

sample chamber.

Figure 4: Flow Diagram

Drain

Fault

Switch

(Vaccum

Port)

V

Compressed

Air In

Restrictor

ExhaustAspiratorRegulator

Water

Trap

Inlet/Blowback

Valve

Sample

Low

Flow

Switch

Calibration

Valve

Calibration Gas Fitting

Flow Meter

Detector

Head

16 30-0954-265-01 Operator’s Manual

Figure 5: Component Location

The sample draw adapter consists of ten major components (see Figure 5): the infrared methane

detector head, regulator, aspirator, detector adapter, detector chamber, flowmeter, calibration valve,

inlet/blowback valve, water trap, and low flow/drain fault contact housing.

Flow Meter

Aspirator Adapter

Drain

Fault

Switch

Infrared

Methane

Detector

Adjustment

Screw

Calibration

Fitting

Beacon 110

Detector

Adapter

BEACON 110

GAS MONITOR

RES ET

Detector

Chamber

Aspirator

Pressure

Gauge

+

-

Junction

Box

AL M 2FA ILALM1

1/4 O.D. Tube Sample Inlet Fitting

Water Trap

Low Flow and Drain

Fault Contact

Housing

Infrared Methane

Detector Head

Calibration

Valve

Calibration Valve

Push Button

Regulator Adjustment

Knob

Inlet/Blowback Valve Button

Regulator

1/4 O.D. Tube Compressed Air

Inlet Fitting

Low Flow

Switch

1/4O.D.TubeAspirator/

Sample Exhaust Fitting

Inlet/Blowback

Valve

30-0954-265-01 Operator’s Manual 17

Infrared Methane Detector Head

The infrared methane detector head provides a signal that can be used by the Beacon 110 to indicate

the sample gas level. Figure 5 above shows the location of the infrared methane detector head. The

detector head consists of the infrared methane detector and a junction box, described below.

Infrared Methane Detector

The infrared methane detector is made up of a miniature infrared combustible gas LEL detector housed

and encapsulated in a pipe nipple. The pipe nipple has 3/4 inch NPT threads on each end and a 1-1/4

inch hex that allows removal or installation of the detector with a wrench. A porous flame arrestor

coated with a hydrophobic film that repels liquids is on one end of the detector and allows sample gas

to enter the detector. Four color coded leads, red, white, green, and black, extend from the other end of

the detector. The leads allow you to connect the detector to the terminal block in the junction box.

Junction Box

The stainless steel, corrosion resistant junction box protects the detector wiring connections. Two

conduit hubs allow for detector installation and wiring. A cover on the front of the junction box allows

access to the interior of the junction box. A locking set screw on the junction box cover allows you to

secure the junction box cover and prevent it from being removed. An O-ring seals the interface

between the junction box cover and the junction box base.

The infrared methane detector is factory installed in the bottom conduit hub. A cable bushing is factory

installed in the top conduit hub.

Regulator

The regulator has an inlet port on its left side with a 1/4” tube fitting. The maximum allowable inlet

pressure is 140 PSI. A gauge at the bottom of the regulator indicates the output pressure. The output

pressure, and detector flow, can be adjusted using the knob on the front of the regulator. The detector

flow rises or falls as the output pressure is increased or decreased.

Aspirator

The aspirator inlet is connected to the output port on the right side of the regulator and the vacuum port

on top is connected to the detector chamber. It has a venturi tube inside it which generates a vacuum at

its top port when compressed air flows through it. The compressed air and the air drawn from the

detector chamber into the top port of the aspirator both exhaust at the right side of the aspirator.

Detector Adapter

The detector adapter screws directly onto the infrared methane detector. It is installed hand tight. It has

an O-ring inside it which seals against the detector. When removing this adapter to change the infrared

methane detector, be sure not to lose this O-ring.

Detector Chamber

The chamber has three thumbscrews which fasten it to the detector adapter. An O-ring at the top of the

chamber seals the chamber/adapter interface. The inlet of the chamber is on the side and is connected

to the exhaust of the flowmeter. The exhaust of the chamber is at the bottom and is connected to the

vacuum port of the aspirator.

18 30-0954-265-01 Operator’s Manual

Flowmeter

The flowmeter indicates the flow to the infrared methane detector. It has a 1/4” OD tube fitting at its

inlet and exhaust port. The exhaust port of the flow meter is connected to the detector chamber. The

flowmeter’s indication range is 1 - 10 SCFH. It has no flow adjustment valve because the flowrate is

controlled by the regulator setting.

Calibration Valve

The calibration valve is a manual operation spring return valve with a push button actuator. This valve

is used to switch from sample flow to calibration gas during the calibration process. When the button is

pushed and held, the sample port is closed and the calibration port is opened.

Inlet/Blowback Valve

The inlet/blowback valve is a manual operation spring return valve. A push button actuator is located

on the front of the valve. This valve is used to switch from sample flow to blow back in the event of a

clogged sample line. When the push button is pressed and held, the valve diverts the compressed air

supply back through the sample line to clear obstructions.

WARNING: The blowback pressure can be as high as 140 psi. Make sure that all personnel and

equipment are clear of the sample line inlet end to avoid personal injury or

equipment damage if a sample line obstruction is blown out of the sample line.

Water Trap

The water trap prevents water from entering the flow system and is self-draining.

Low Flow/Drain Fault Contact Housing

The low flow switch provides open contacts in normal operation in the low flow/drain fault contact

housing that close in the event of a low flow condition. Two contact wires protrude from the side of the

switch and enter the low flow contact housing through a plastic cable bushing on the left side of the

housing. Terminals are provided in the low flow/drain fault contact housing for field connection to the

switch contacts.

The drain fault switch senses a break or very low flow in the water drain line and provides open

contacts in normal operation in the low flow/drain fault contact housing which close when the switch

senses a break, a very low drain flow, or a shut down.

Connecting monitoring devices to the low flow and drain fault contact terminals provides the user with

a notification of a contact closure. Each set of contacts may have their own monitoring device or they

may share one. See “Low Flow/Drain Fault Wiring” on page 26 for instructions to wire these terminals

using the two scenarios.

A second plastic cable bushing on the bottom of the low flow/drain fault contact housing allows for

cable entry to the housing. The size range of the cable which can be routed through the second cable

bushing is .064’’ - .210’’ OD.

30-0954-265-01 Operator’s Manual 19

Chapter 3: Installation & Startup

Overview

This chapter describes procedures to mount the 30-0954-265-01, make tubing connections, make

wiring connections, and start up the monitor.

WARNING: Perform all installation and start-up procedures in a “fresh air” environment

(environment known to be free of combustible gas, toxic gas, and of normal oxygen

content). The 30-0954-265-01 is not in operation as a gas monitoring system until

the start-up procedure is complete.

Mounting the 30-0954-265-01

Perform the following procedure to install the sample draw aspirator adapter at the mounting site.

Figure 6: 30-0954-265-01 Outline & Mounting Dimensions

FAIL ALM 1 AL M 2

RESET

+

-

0.75

(4X) Ø 0.50

BEACON 110

GASMONITOR

0.75

19.25

20.75

19.25

20.75

20 30-0954-265-01 Operator’s Manual

1. Select the mounting site. When you select the mounting site consider the following factors:

• Is an AC or DC power source available?

• Is there enough room to open the Beacon 110 housing door and make wiring connections

through the conduit hubs at the bottom of the housing?

• Are the Beacon 110’s display screen and status lights visible?

• Is there sufficient clearance for routing the sample, compressed air, and exhaust lines?

2. If necessary, close and latch the housing door.

3. Position the 30-0954-265-01 on a vertical surface at eye level (4 1/2 to 5 feet from the floor).

4. Install the 30-0954-265-01 to a flat vertical surface using the four mounting holes (0.50’’ diameter)

in the corners of the panel.

Making Tubing Connections

1. Connect a sample line from the area to be sampled to the sample inlet fitting at the bottom right of

the aspirator panel. The fitting accepts 1/4” OD rigid metal tubing such as copper, aluminum, or

stainless steel tubing. Be sure to use tubing appropriate for the target gas.

2. The aspirator exhaust includes the sample air. It may be routed to a different area where it can be

exhausted safely by running tubing from the aspirator exhaust fitting to the “safe” area. The

aspirator exhaust fitting is a 1/4’’ OD tubing fitting.

3. Turn the regulator adjustment knob completely counterclockwise and then turn it one turn

clockwise so that the flow will start out at a low level when the compressed air is connected and

turned on.

4. Connect a compressed air source up to a maximum of 140 PSI to the inlet of the regulator.

Although the regulator is rated up to 300 PSI inlet pressure, other components are rated to a

maximum of 140 PSI.

NOTE: Connect the compressed air but leave it turned off until instructed to set the flow rate in

“Start Up” on page 28.

Page is loading ...

RKI Instruments 30-0954-265-01 Owner's manual

RKI Instruments 30-0954-265-01 Owner's manual

Related papers

Other documents