RKI Instruments Eagle Series User manual

RKI Instruments, Inc. • 1855 Whipple Rd. • Hayward, CA 94544 • [phone]
Instruction Manual
Eagle Series
Portable Multi-Gas Detector
Part Number: 71-0028RK
Edition: Third
Released: July 2001

Warranty Eagle Instruction Manual
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.
THIS WARRANTY IS IN LIEU OF ANY 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. 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 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.
absorbent cartridges filter elements
pump diaphragms and valves batteries
lamp bulbs and fuses

Eagle Instruction Manual Table of Contents
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Case. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Alarm Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Battery Charger Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Interface Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Sample-Drawing System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Methane Elimination Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
CAL/SETUP Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Starting Up the Eagle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Monitoring Combustible Gas in the PPM Range. . . . . . . . . . . . . . . . . 11
Monitoring Combustible Gases Other than Methane . . . . . . . . . . . . . 12
Setting User Access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Turning Off the Eagle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Alarm Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Resetting Gas Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table of Contents Eagle Instruction Manual
Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
User and Station ID Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Peak Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Elapsed Time Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
TWA/STEL Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Battery Voltage Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Date/Time Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Clear Data Logger Screens. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Remaining Log Time Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Setup Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Tips for Using Setup Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Entering Setup Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Updating the Battery Type Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Updating Channel Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Updating the Combustible Gas Channel’s Units of Measure. . . . . . . 31
Updating the Alarm Point Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Updating the Eagle’s Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Updating the Lunch Break Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Updating the Alarm Latching Setting . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Updating the Alarm Silence Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Turning the User ID Function On or Off . . . . . . . . . . . . . . . . . . . . . . . . 35
Updating the Auto Calibration Settings . . . . . . . . . . . . . . . . . . . . . . . . 35
Updating the Back Light Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Turning the Auto Fresh Air Function On or Off. . . . . . . . . . . . . . . . . . 36
Updating the Interval Time Setting (data log option) . . . . . . . . . . . . . 37
Updating the Log Data Over Write Setting (data log option) . . . . . . 37
Updating the Time Calibration Setting (data log option). . . . . . . . . . 38
Updating the Date and Time Settings (data log option) . . . . . . . . . . . 38
Updating the Zero Following Settings. . . . . . . . . . . . . . . . . . . . . . . . . . 39
Updating the Confirmation Beep Setting . . . . . . . . . . . . . . . . . . . . . . . 39
Returning to Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Eagle Instruction Manual Table of Contents
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Calibration Supplies and Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Preparing for Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Calibrating the Eagle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Displaying the Battery Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Replacing Alkaline Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Recharging Ni-Cd Batteries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Replacing Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Appendix A: Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Appendix B: Methane Elimination . . . . . . . . . . . . . . . . . . . . . . . . .52
Appendix C: Non-Standard Toxic Gas Sensors. . . . . . . . . . . . . . .54
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Calibrating Non-Standard Toxic Gas Sensors. . . . . . . . . . . . . . . . . . . . 55
Replacing Non-Standard Toxic Gas Sensors. . . . . . . . . . . . . . . . . . . . . 57
Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Appendix D: Carbon Dioxide Sensors . . . . . . . . . . . . . . . . . . . . . .59
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Normal Operation of Carbon Dioxide Sensors. . . . . . . . . . . . . . . . . . . 60
Demand Zero for Carbon Dioxide Sensors. . . . . . . . . . . . . . . . . . . . . . 60
Calibrating Carbon Dioxide Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Replacing Carbon Dioxide Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Appendix E: Infrared Methane Sensors . . . . . . . . . . . . . . . . . . . . .64
Target Gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Calibrating Infrared Methane Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . 65
Replacing Infrared Methane Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Table of Contents Eagle Instruction Manual
Appendix F: Eagle Tank Tester Model . . . . . . . . . . . . . . . . . . . . . .67
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Appendix G: Five-Gas and Six-Gas Models . . . . . . . . . . . . . . . . .70
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Displaying Additional Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Calibration, Display, and Setup Modes . . . . . . . . . . . . . . . . . . . . . . . . . 71
Appendix H: Eagle Transformer Gas Tester. . . . . . . . . . . . . . . . . .72
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Appendix I: Installing the Data Logger Board . . . . . . . . . . . . . . .74

Eagle Instruction Manual Introduction • 1
Introduction
Overview
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.

2 • Introduction Eagle Instruction Manual
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.

Eagle Instruction Manual Specifications • 3
Specifications
Table 1 lists physical and environmental specifications for the Eagle.
Table 2 lists specifications for the Eagle’s standard sensors.
Table 1: Eagle Specifications
Target Gases1Combustible gas; Oxygen (O2),
Carbon monoxide (CO); Hydrogen sulfide (H2S)
Case High-impact polycarbonate-polyester blend
Safety/Regulatory2CSA/NTRL and UL classified intrinsically safe
(Class I, Division 1, Groups A, B, C, and D)
Dimensions 10.5 in. x 5.9 in. x 7.0 in. (26.7 cm x 15.0 cm x 17.8 cm)
Weight 5 lbs. (2.25 kg)
Power Four D-size batteries (alkaline or Ni-Cd)
Continuous Operating
Hours Alkaline: 30 hours (minimum)
Ni-Cd: 18 hours (minimum)3
Operating Temperature 14°F to 104°F (-10°C to 40°C)
Humidity 0 to 95% (non-condensing)
Standard Accessories Shoulder strap; alkaline batteries; hydrophobic probe;
5-foot hose
Optional Accessories Ni-Cd batteries; battery charger (115 VAC);
continuous operation adapter (115 VAC or 12 VDC);
dilution fitting (1:1 or 3:1); remote alarm; data logger
1Appendices C, D, and E describe the Eagle’s non-standard sensors.
2Consult RKI Instruments, Inc., for regulatory classifications of versions other than the standard 4-gas
and non-standard toxic gas versions.
3Based on RKI part number 49-1240RK.

4 • Specifications Eagle Instruction Manual
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)Combustible Gas (PPM2)Oxygen Hydrogen
Sulfide Carbon Monoxide
Range 0 to 100% LEL Depends on
target gas40 to 40% O20 to 100
ppm 0 to 500 ppm
Alarm 1 10% LEL 5000 ppm 19.5% O2
(decreasing) 10.0 ppm 25 ppm
Alarm 2 50% LEL 25,000 ppm 23.5% O2
(increasing) 30.0 ppm 50 ppm
TWA Alarm N/A N/A N/A 10.0 ppm 25 ppm
STEL Alarm N/A N/A N/A 15.0 ppm 400 ppm
Detection
Principle Catalytic combustion Catalytic combustion Electro- chemical Electro- chemical Electro- chemical
Response Time
(to 90%)530 seconds 30 seconds 30 seconds 30 seconds 30 seconds
Accuracy
(of fullscale) ± 5% ± 5% ± 5% ± 5% ± 5%
1LEL (Lower Explosive Limit)
2PPM (Parts Per Million)
3Alarms settings are user adjustable. See “Updating the Alarm Point Settings” on page 32.
4The 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.
5With the Eagle’s standard hose and probe attached.

Eagle Instruction Manual Description • 5
Description
Case
The Eagle has a plastic case with a full-sized handle. The high-
visibility 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 non-
displayed 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
Button Function(s)
POWER/ENTER • turns the Eagle on and off.
• used during setup and calibration.
RESET/SILENCE silences and resets audible alarm if the Eagle is programmed for
latching alarms and the Alarm Silence option is on 1
DISP/ADJ • activates display modes
• enters instructions into the Eagle’s microprocessor
LEL/PPM switches combustible gas detection ranges between %LEL
(lower explosive limit) and PPM (parts per million)2
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
1The Eagle’s alarms are user-adjustable. See “Setup Mode” on page 23.
2The LEL range is commonly used for safety applications; the PPM range can be used for environmental
or other special applications.

6 • Description Eagle Instruction Manual
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 PC-
compatible 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.

Eagle Instruction Manual Description • 7
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 O2sensor to the CN2 socket on the analog PCB.
The O2sensor 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.

8 • Description Eagle Instruction Manual
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.

Eagle Instruction Manual Operation • 9
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
examples only. The screens displayed by your Eagle model
may be slightly different.
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.)
•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.

10 • Operation Eagle Instruction Manual
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.

Eagle Instruction Manual Operation • 11
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 low-
light 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.

12 • Operation Eagle Instruction Manual
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)
Target Gas LEL Factor
(Methane Calibration) PPM Factor (Methane Calibration)
Benzene 2.80 0.67
Ethane 1.40 0.84
Ethanol 2.25 1.5
Ethylene 1.58 0.4
Hexane 3.00 0.67
Hydrogen 1.65 1.4
IPA 2.83 1.13
Isobutane 1.93 1.21
MEK 3.00 1.08
Methane 1.00 1.00
Methanol 2.33 2.57
Propane 2.30 0.92
Propylene 2.00 0.80
Toluene 2.80 0.67

Eagle Instruction Manual Operation • 13
Setting User Access
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.)

14 • Alarms Eagle Instruction Manual
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
examples only. The screens displayed by your Eagle model
may be slightly different.
First gas alarm
If a channel’s gas reading exceeds the first alarm setting (falls below
for the oxygen channel):
•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.