Part Number: 71-0028RK
Edition: Third
Released: July 2001
RKI Instruments, Inc. • 1855 Whipple Rd. • Hayward, CA 94544 • (510) 441-5656
Warranty
RKI Instruments, Inc., warranties gas alarm equipment manufactured
by RKI and sold by RKI to be free from defects in materials and
workmanship 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 items that are subject to deterioration or
consumption in normal service, and which must be cleaned, repaired,
or replaced routinely. Those items include, but are not limited to:
This warranty is voided by mechanical damage, misuse, alteration,
rough handling, or repairs not in accordance with the operator’s
manual. This warranty indicates the full extent of our liability. We are
not responsible for removal or replacement costs, local repair costs,
transportation costs, or contingent expenses incurred without our
prior approval.
absorbent cartridgesfilter elements
pump diaphragms and valvesbatteries
lamp bulbs and fuses
This warranty covers instruments and parts sold to end users by
authorized distributors, dealers, and representatives of RKI
Instruments, Inc.
We do not assume indemnification for any accident or damage caused
by the operation of this gas monitor. Our warranty is limited to
replacement of parts or our complete goods.
The RKI Eagle is the most advanced portable gas detection system
available. The Eagle is built for rugged reliability and ease of use and
includes the latest innovations in gas detection technology:
• Simultaneous detection of one to six gases. Standard target gases
include combustible gas (% LEL and ppm), oxygen deficiency,
carbon monoxide, and hydrogen sulfide.
• Powerful sample-drawing pump with up to 100-foot range.
• Dot-matrix liquid crystal display (LCD) for complete,
understandable information at a glance.
• Microprocessor control for all functions, including data logging
and user-adjustable alarms.
• Visible and audible alarms for hazardous conditions and
malfunctions.
• UL and CSA classified. Intrinsic safety for Class I, Division I,
Groups A, B, C, and D hazardous atmospheres (standard 4-gas
model and non-standard toxic gas versions). Consult RKI
Instrument, Inc., for classification of other Eagle versions.
• Tough case with a balanced, light-weight design.
WARNING: The Eagle detects a combination of combustible gas,
oxygen deficiency, hydrogen sulfide and carbon
monoxide, or other toxic gases which can be lethal. Users
must follow the instructions and warnings in this
manual to assure proper and safe operation of the Eagle.
Eagle Instruction ManualIntroduction • 1
About this Manual
This manual is intended for use with all Eagle models. Examples used
in this manual are for the standard four-gas model (combustible gas,
oxygen, carbon monoxide, and hydrogen sulfide). Differences
between the standard four-gas model and other Eagle models are
noted where applicable. This manual is organized as follows:
• The standard sections included in pages 1 through 49 describe the
Eagle’s specifications and internal and external components. These
sections also describe the operation, calibration, and maintenance
of the Eagle.
• Appendix A lists part numbers for the Eagle’s replacement parts
and accessories.
• Appendix B describes the Eagle’s methane elimination feature.
• Appendices C through E describe the Eagle’s non-standard
sensors.
• Appendix F describes the Eagle tank tester model.
• Appendix G describes the Eagles’s five- and six-gas models.
• Appendix H describes the procedure to install the Eagle’s optional
Data Logger board.
2 • IntroductionEagle Instruction Manual
Specifications
Table 1 lists physical and environmental specifications for the Eagle.
Table 2 lists specifications for the Eagle’s standard sensors.
(Class I, Division 1, Groups A, B, C, and D)
Dimensions10.5 in. x 5.9 in. x 7.0 in. (26.7 cm x 15.0 cm x 17.8 cm)
Weight5 lbs. (2.25 kg)
PowerFour D-size batteries (alkaline or Ni-Cd)
Continuous Operating
Hours
Alkaline: 30 hours (minimum)
Ni-Cd: 18 hours (minimum)
3
Operating Temperature14°F to 104°F (-10°C to 40°C)
Humidity0 to 95% (non-condensing)
Standard AccessoriesShoulder strap; alkaline batteries; hydrophobic probe;
dilution fitting (1:1 or 3:1); remote alarm; data logger
1 Appendices C, D, and E describe the Eagle’s non-standard sensors.
2 Consult RKI Instruments, Inc., for regulatory classifications of versions other than the standard 4-gas
and non-standard toxic gas versions.
3 Based on RKI part number 49-1240RK.
Eagle Instruction ManualSpecifications • 3
Table 2 lists specifications for the Eagle’s standard sensors. Your Eagle
model may not include all of the sensors listed below. The alarm
settings are user-adjustable (see “Updating the Alarm Point Settings”
on page 32.)
Table 2: Standard Sensor Specifications
Combustible
Gas (%LEL1)
Range0 to 100% LELDepends on
Alarm 110% LEL5000 ppm19.5% O2
Combustible
Gas (PPM2)
target gas
4
Oxygen
0 to 40% O
Hydrogen
Sulfide
0 to 100
2
ppm
10.0 ppm25 ppm
Carbon
Monoxide
0 to 500
ppm
(decreasing)
Alarm 250% LEL25,000 ppm23.5% O2
30.0 ppm50 ppm
(increasing)
TWA AlarmN/AN/AN/A10.0 ppm25 ppm
STEL AlarmN/AN/AN/A15.0 ppm400 ppm
Detection
1 LEL (Lower Explosive Limit)
2 PPM (Parts Per Million)
3 Alarms settings are user adjustable. See “Updating the Alarm Point Settings” on page 32.
4 The PPM range represents the same range as 0 to 100% LEL for that gas. For example, 100% LEL for methane
= 5% by volume = 50,000 PPM. Therefore, the PPM range for methane is 0 to 50,000.
5 With the Eagle’s standard hose and probe attached.
4 • SpecificationsEagle Instruction Manual
Description
Case
The Eagle has a plastic case with a full-sized handle. The highvisibility case is shielded to reduce radio frequency and
electromagnetic interference (RFI/EMI). The system is light-weight
and balanced, which makes the Eagle easy to carry and use for
extended periods. A foam rubber gasket between the top and bottom
case components is water- and dust-resistant. You can set the case into
2.5 in. of water without damage.
Control Panel
The control panel is at the top of the Eagle. The touch-pad buttons
reduce the risk of accidental activation. The dot matrix display
simultaneously shows the gas reading for all installed sensors. (For
the 5- and 6-gas versions, the Eagle displays the gas reading of four
channels. Use the AIR/▲ and SHIFT/▼ buttons to scroll to the nondisplayed channels.) The display also shows information for each of
the Eagle’s program modes.
Buttons
The control panel includes the following six buttons.
Table 3: Eagle Button Functions
ButtonFunction(s)
POWER/ENTER• turns the Eagle on and off.
• used during setup and calibration.
RESET/SILENCEsilences and resets audible alarm if the Eagle is programmed for
latching alarms and the Alarm Silence option is on
DISP/ADJ• activates display modes
• enters instructions into the Eagle’s microprocessor
LEL/PPMswitches combustible gas detection ranges between %LEL
(lower explosive limit) and PPM (parts per million)
AIR/▲• activates the demand-zero function (automatically adjusts the
Eagle in fresh-air conditions)
• scrolls through the display and settings modes
SHIFT/▼• scrolls through the calibration and settings modes
• enters instructions into the Eagle’s microprocessor
1
2
1 The Eagle’s alarms are user-adjustable. See “Setup Mode” on page 23.
2 The LEL range is commonly used for safety applications; the PPM range can be used for environmental
or other special applications.
Eagle Instruction ManualDescription • 5
Alarm Lights
Two ultra-bright, red, light-emitting diodes (LEDs) provide visual
alarms for gas concentrations and malfunctions. They are mounted on
the top rear of the case for greatest visibility.
Battery Charger Connector
The battery charger connector is mounted on the top right rear of the
case. The external battery charger connects to this connector to
recharge nickel-cadmium (Ni-Cd) batteries. The continuous operation
adapter also connects to the battery charger connector.
Interface Port
The interface port is for the optional data logging or remote buzzer.
The port is mounted on the top left rear of the case. When the Data
Logging option is installed, the Eagle records gas concentrations at
programmed intervals and stores data on gas detected. You can
download these measurements through the interface port to a PCcompatible computer for use in data analysis programs. Data retrieval
requires the Eagle Data Downloader Kit (with PC connection cable
and software).
The optional remote buzzer also connects to the interface port. The
remote buzzer is for use in applications where a remote alarm
indication is required.
Buzzer
A solid-state electronic buzzer is mounted inside the top of the case.
The buzzer sounds for gas alarms, malfunction, low battery voltage,
and as an indicator during use of the Eagle’s many display and
adjustment options.
Sample-Drawing System
The sample-drawing system includes the pump, sensor block and
connections, internal filter and charcoal scrubber, and the external
hose, probe, and hydrophobic filter. This system provides continuous
flow of sampled air to the sensors while keeping out liquids and dust.
With proper setup, the system can draw a sample flow from up to 100
feet away from the Eagle. Consult RKI Instruments, Inc., for sample
flow distances longer than 100 feet.
6 • DescriptionEagle Instruction Manual
Sensors
This section describes the Eagle’s standard sensors. Non-standard
sensors are described in Appendices C, D, and E. Your specific Eagle
model may not include all of the sensors described below. Under
normal conditions, the Eagle’s standard sensors have an operating life
of approximately two years.
Combustible gas sensor
The combustible gas (LEL) sensor is mounted with the flame arrestor
down in the sensor block to allow the sample flow to diffuse into the
sensor. Five pins extend from the top of the sensor. The sensor cable
connects to the pins on one end and terminates in a four-position
connector, which plugs into the COMB socket on the analog print
circuit board (PCB).
The LEL sensor detects combustible gas and vapors in the atmosphere
with a catalytic platinum element. The reaction of gas with oxygen on
the catalyst causes a change in the resistance of the element, which is
converted by the Eagle into a reading of combustible gas
concentration.
Oxygen sensor
The oxygen (O2) sensor is mounted face down in the sensor block to
allow the sample flow to diffuse into the sensor. A multi-pin plug
connects the O2 sensor to the CN2 socket on the analog PCB.
The O2 sensor is an electrochemical cell, which reacts to the oxygen in
the atmosphere and produces a voltage proportional to the oxygen
concentration. This voltage is converted by the Eagle into a reading of
oxygen concentration.
Standard toxics (CO and H2S) sensors
The CO and H2S sensors are physically very similar. They have
cylindrical bodies and are mounted face down in the sensor block. A
three-position connector from each sensor plugs into EC1 or EC2
socket on the analog PCB. The sensor connected to the EC1 socket
displays as channel 3; the sensor connected to the EC2 socket displays
as channel 4.
The toxics sensors are electrochemical cells, which react to the target
gas in the atmosphere, producing a current proportional to the
concentration of gas. The current is converted by the Eagle into a
reading of target gas concentration.
Eagle Instruction ManualDescription • 7
Circuit Boards
The Eagle circuit boards analyze, record, control, store, and display
the information collected.
The analog PCB is mounted perpendicular to the base of the
instrument case. It is located in the same half of the case as the sensors
and sample-drawing system. The sensor leads connect to the analog
PCB.
The main PCB is mounted in the top half of the case. It includes the
methane elimination and CAL/SETUP switches.
CAUTION:The circuit boards should be serviced only by authorized repair
personnel.
Methane Elimination Switch
The methane elimination switch (SW1) is mounted near the top right
corner of the main PCB.
For applications where methane is an interfering gas, you can set the
methane elimination switch to eliminate most response to methane
(see “Appendix B: Methane Elimination” on page 52). An external
methane elimination switch is available as an option.
CAL/SETUP Switch
The CAL/SETUP switch (SW2) is mounted near the middle left edge
of the main PCB.
This switch controls the Eagle functions available to the user by
disabling the SHIFT/▼ button. Without the use of this button, the
user is unable to enter Calibration or Setup mode. (Display mode is
available with either switch setting.) See “Setting User Access” on
page 13 to change the switch setting.
8 • DescriptionEagle Instruction Manual
Operation
The Eagle has four operating modes: normal operating mode, display
mode, setup mode, and calibration mode. This section describes the
Eagle in normal operating mode. It includes procedures to start up the
Eagle, set various detection options for the combustible gas channel,
and shut down the Eagle.
NOTE: The screens illustrated in this section are intended as
Starting Up the Eagle
1.Connect the sample hose to the Eagle’s quick connect inlet fitting.
2.Connect the hydrophobic filter and probe tip to the sample hose’s
quick connect fitting.
3.Press and briefly hold down the POWER/ENTER button. If the
Lunch Break feature is on (see page 33), the Resume Datalog
screen displays. (If the Lunch Break feature is off, the Battery
Voltage screen displays.)
examples only. The screens displayed by your Eagle model
may be slightly different.
•Press the AIR/▲ button to continue accumulating time-
weighted average (TWA) and PEAK readings from the last
time the Eagle was used. (The short-term exposure limit
[STEL] reading is reset each time the Eagle is turned on.) The
Battery Voltage screen displays.
•Press the DISP/ADJ button to restart these measurements. The
Battery Voltage screen displays
If you do not press the AIR/▲ or DISP/ADJ button within 5
seconds, the Eagle automatically resumes datalog readings and
displays the Battery Voltage screen.
Eagle Instruction ManualOperation • 9
The Battery Voltage screen displays the minimum usable and
actual battery voltage (for example, 6.0V). If the battery voltage is
too low, the Eagle will not continue.
NOTE: The following screen only displays if the data logging option
is installed. If the data logging option is not installed, the Self
Diagnosis screen displays after the Battery Voltage screen.
This message displays the date and time as set in Setup mode. The
data logging option uses this information to record the time and
date of sample and alarm events.
The following two screens display while the Eagle checks itself for
proper operation. The Eagle alerts you if a malfunction occurs.
When the Eagle successfully completes its self check, the OK
message displays in place of the STAND BY message, then the
normal operating screen displays. The normal screen displays
fresh-air concentrations for all gases. The Eagle sounds a double
tone to indicate it is in normal operation.
10 • OperationEagle Instruction Manual
CAUTION:Do not use gas from a cigarette lighter to test response to
combustibles. Exposing the combustible gas sensor to
uncontrolled high concentrations of gas will reduce response
and sensor life.
4.Verify that the Eagle is operating correctly. Use the RKI Check Kit
to easily verify correct operation of the Eagle.
WARNING: If the Eagle does not respond to verification, take it to a
known “fresh-air” environment, then perform the
demand zero procedure described in “Preparing for
Calibration” on page 41. Repeat step 4 before using the
Eagle in a potentially hazardous location.
Normal Operation
The Eagle continuously monitors the sampled atmosphere and
displays the gas concentrations present for its target gases. In a lowlight environment, press any button to turn on the display backlight.
(See “Updating the Back Light Setting” on page 36 to program
backlight duration.) If the Confirmation Beep option is turned on, the
Eagle beeps once every 15 minutes to verify that it’s on the job.
To use the probe, insert it into the monitoring area and wait a few
seconds for response.
NOTE: Response time increases with the length of the sample hose.
Very long sample hoses may require several seconds to show
response at the Eagle.
Monitoring Combustible Gas in the PPM Range
1.Start the Eagle in the LEL range as described in “Starting Up the
Eagle” on page 9.
2.Allow the combustibles sensor to stabilize (3 to 5 minutes). This
stabilization period is required for the PPM range only.
3.Press the LEL/PPM button. The Eagle displays PPM in place of
LEL% for combustible gas, and the gas reading displays in parts
per million.
4.If the PPM reading is not zero, take the Eagle to a fresh air
environment, then perform the demand zero procedure as
described in “Preparing for Calibration” on page 41.
NOTE: For the data logging option, combustible gas readings are
logged in %LEL regardless of the LEL/PPM setting.
Eagle Instruction ManualOperation • 11
Monitoring Combustible Gases Other than Methane
If the combustible gas sensor is calibrated to methane (CH4), use
Table 4 to determine the concentration of combustible gases other
than methane. This table is based on Eagles in full response mode
(methane elimination switch set to CH4) and calibrated to methane.
Multiply the display reading by the factor in the appropriate column
in the table. For example, if you are using the Eagle to detect hexane
and the display reads 10% LEL, the actual hexane reading is
10% x 3.00 = 30% LEL hexane.
WARNING: The Eagle’s alarms are initiated by the DISPLAY reading
not the FACTORED reading. If you are monitoring for
hexane as in the example below and the low alarm is set
for 10% LEL, the Eagle will initiate a low alarm at 30%
LEL hexane (display reading of 10% LEL).
To determine the concentration of other combustible gases with the
Eagle in methane elimination mode, see Table 7 on page 53.
Table 4: Full Response Mode Conversion Factors (Methane Calibration)
The CAL/SETUP switch controls the Eagle functions available to the
user. The switch setting does not affect the Eagle’s ability to display
gas readings and indicate gas and malfunction alarms.
1.Turn off the Eagle.
2.Unscrew the two large screws on the top of the case.
3.Turn over the top half of the case, and locate the CAL/SETUP
switch (SW2) near the middle along one edge of the main
processor board.
CAUTION:The Methane Elimination switch (SW1) is on the opposite edge
of the board near the front end. DO NOT confuse these two
switches.
4.Place the CAL/SETUP switch in the appropriate position.
•To give the Eagle access to all modes, place the switch in the
ON position.
•To limit the Eagle to normal operating and display modes,
place the switch in the OFF position. (The Eagle prevents
access to the setup and calibration modes by disabling the
SHIFT/▼ button.)
5.Place the top of the case in its original position, then secure it with
the large screws you loosened in step 2.
6.Turn on the Eagle.
NOTE: Make sure the Eagle’s calibration is current and the setup
options appropriate and safe for the operating environment
before placing the CAL/SETUP switch in the OFF position.
Turning Off the Eagle
To turn off the Eagle, press and hold down the POWER/ENTER
button until GOOD-BYE displays, then release the button. (You must
wait for GOOD-BYE to disappear before you can turn on the Eagle
again.)
Eagle Instruction ManualOperation • 13
Alarms
Alarm Indications
This section describes the Eagle’s audible and visual alarm indications
for gas, over range, low flow, low battery, and sensor failure alarms.
This section also describes how to reset gas alarms.
The default alarm settings are listed in Table 2, “Standard Sensor
Specifications” on page 4. The alarm settings are user-adjustable as
described in “Updating the Alarm Point Settings” on page 32.
NOTE: The screens illustrated in this section are intended as
First gas alarm
If a channel’s gas reading exceeds the first alarm setting (falls below
for the oxygen channel):
examples only. The screens displayed by your Eagle model
may be slightly different.
• ALM1 displays in the alarm field for that channel.
• The channel’s display line flashes.
• The buzzer sounds a pulsed tone.
• The alarm lights flash.
Second gas alarm
If a channel’s gas reading exceeds the second alarm setting:
• ALM2 displays in the alarm field for that channel.
• The channel’s display line flashes.
• The buzzer sounds a pulsed tone.
• The alarm lights flash.
14 • AlarmsEagle Instruction Manual
STEL alarm (toxics only)
If a toxic gas channel’s average gas reading for the past 15 minutes
exceeds the STEL alarm setting:
• STEL displays in the alarm field for that channel.
• The channel’s display line flashes.
• The buzzer sounds a pulsed tone.
• The alarm lights flash.
TWA alarm (toxics only)
If a toxic gas channel’s average gas reading for the past 8 hours
exceeds the TWA alarm setting:
• TWA displays in the alarm field for that channel.
• The channel’s display line flashes.
• The buzzer sounds a pulsed tone.
• The alarm lights flash.
Over range alarm
If a channel’s gas reading exceeds that channel’s full-scale setting:
• OVER displays in the alarm field for that channel.
• The channel’s display line flashes.
• The buzzer sounds a pulsed tone.
• The alarm lights flash.
Eagle Instruction ManualAlarms • 15
Low flow alarm
If the Eagle’s sample system becomes restricted or blocked (for
example plugged probe, fouled filter, pinched tubing):
• The message FAIL LOW FLOW LEVEL replaces the normal screen.
• The buzzer sounds a steady tone.
• The alarm lights are on continuously.
• The pump automatically shuts off to prevent damage.
Correct the flow blockage. Press the RESET/SILENCE button to turn
off the alarms and restart the pump. If low flow conditions still exist,
the Eagle will go into alarm again. If the condition cannot be corrected
immediately, take the Eagle out of service to a non-hazardous area.
Low battery alarm
When the battery charge drops near the lower limit, the Eagle
displays the following screen (BAT flashes). For alkaline batteries, you
have approximately 3 hours of use remaining; for Ni-Cd batteries you
have approximately 15 minutes of use remaining.
Low Battery
Warning
When the battery voltage drops to the minimum limit, the following
screen displays, the alarm lights are on continuously, and the buzzer
sounds a steady tone. The Eagle is not operational as a gas monitoring
device when this screen displays.
Low Battery
ALARM
NOTE: If you are using the data logging accessory and the Eagle goes
into Low Battery ALARM, shut off the Eagle in order to save
the current data logging session.
16 • AlarmsEagle Instruction Manual
Sensor failure alarm and emergency operation
The Eagle continuously monitors itself for proper operation. If a
malfunction occurs, the Eagle alerts you with audible and visual
alarms.
If a sensor fails during start-up or normal operation:
• The message FAIL SENSOR displays.
• The failed sensor displays in parenthesis.
• The buzzer sounds a steady tone.
• The alarms lights flash.
If the sensor failed during start-up, the Eagle continues with the normal
start-up sequence after the fail screen displays. When the normal
screen displays, the Eagle replaces the gas reading for the failed
sensor with xxxxx.
If the sensor fails during normal operation and you want to continue
monitoring for the remaining target gases, turn the Eagle off, then follow
the appropriate start-up sequence. When the normal screen displays,
the Eagle replaces the gas reading for the failed sensor with xxxxx.
Eagle Instruction ManualAlarms • 17
Resetting Gas Alarms
You can set the Eagle’s gas alarms for latching or self-resetting alarms
(see “Updating the Alarm Latching Setting” on page 34).
Self-resetting alarms
Self-resetting alarms automatically shut off and reset when the gas
reading falls below (or rises above for oxygen) the alarm setting. You
cannot silence or reset self-resetting alarms.
Latching alarms
You can set latching alarms with or without Alarm Silence (see
“Updating the Alarm Silence Setting” on page 34).
With Alarm Silence on:
When the Eagle goes into gas alarm, press the RESET/SILENCE
button to silence the buzzer. The LEDs continue to flash, and the Eagle
continues to display the current alarm level.
The gas reading must fall below (or rise above for oxygen) the low
alarm (ALM1) setting before you can reset the alarm. Press the
RESET/SILENCE button to reset the alarm. The LEDs turn off and the
Eagle returns to the normal screen.
With Alarm Silence off:
The gas reading must fall below (or rise above for oxygen) the low
alarm (ALM1) setting before you can reset the alarm. Press the
RESET/SILENCE button to reset the alarm. The LEDs and buzzer
turn off, and the Eagle returns to the normal screen.
NOTE: With Alarm Silence off, you cannot silence the buzzer while
the gas reading is above (below for oxygen) the low alarm
(ALM1) setting.
18 • AlarmsEagle Instruction Manual
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