RKI Instruments GX-2009 User manual

www.rkiinstruments.com
GX-2009
Portable Gas Monitor
Operator’s Manual
Part Number: 71-0158RK
Revision: I
Released: 2/25/15

GX-2009 Operator’s Manual
WARNING
Read and understand this instruction manual
before operating instrument. Improper use of
the gas monitor could result in bodily harm
or death.
Periodic calibration and maintenance of the
gas monitor is essential for proper operation
and correct readings. Please calibrate and
maintain this instrument regularly!
Frequency of calibration depends upon the
type of use you have and the sensor types.
Typical calibration frequencies for most
applications are between 1 and 3 months, but
can be required more often or less often
based on your usage.

GX-2009 Operator’s Manual Warranty
Warranty RKI Instruments, Inc. warrants the GX-2009 sold by us to be free from
defects in materials, workmanship, and performance for a period of two
years from the date of shipment from RKI Instruments, Inc. This includes
the instrument and the original sensors. Replacement parts are warranted
for 1 year from the date of their shipment from RKI Instruments, Inc. Any
parts found defective within their warranty 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 instruction
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. INNO EVENT SHALL RKI INSTRUMENTS, INC. BE LIABLE
FOR INDIRECT, INCIDENTAL, OR CONSEQUENTIAL LOSS OR DAMAGE OF ANY KIND
CONNECTED WITH THE USE OF ITS PRODUCTS OR FAILURE OF ITS PRODUCTS TO
FUNCTION OR OPERATE PROPERLY.
This warranty covers instruments and parts sold to users only 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 replacement
of parts or our complete goods.
Absorbent cartridges
Filter elements, disks, or sheets
Pump diaphragms and valves

Table of Contents GX-2009 Operator’s Manual
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Alligator & Belt Clips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Sensor Retainer/Sensor Retainer Gasket/Sensor Cover Retainer. . . . . . . . . . . . 6
Scrubber Filters/Sensor Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
LCD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Control Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Printed Circuit Boards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Alarm LED Arrays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Buzzer & Vibrator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
NiMH Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Charging Station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Start Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Start-up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Performing a Fresh Air Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Turning Off the GX-2009. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Combustible Gas Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Aspirator Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Data Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
GX-2009 Setup Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Calibration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Using Calibration Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Setting the Date & Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Performing a Fresh Air Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Performing a Span Adjustment in AUTO CAL. . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Performing a Span Adjustment in ONE CAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Performing a Bump Test in BUMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Discharging the Batteries With the REFRESH Function. . . . . . . . . . . . . . . . . . . 46

GX-2009 Operator’s Manual Table of Contents
User Setup Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Using User Setup Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Setting the Date & Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Performing a Fresh Air Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Performing a Span Adjustment in AUTO CAL. . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Performing a Span Adjustment in ONE CAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Setting the Alarm Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Setting the Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Recharging the GX-2009’s NiMH Batteries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Replacing the GX-2009’s NiMH Batteries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Checking the Combustible Gas Sensor’s Condition. . . . . . . . . . . . . . . . . . . . . . 62
Replacing the Scrubber Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Replacing the Sensor Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Replacing a Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
WARNING: Understand manual before operating. Substitution of
components may impair intrinsic safety. To prevent
ignition of a hazardous atmosphere, batteries must only
be changed or charged in an area known to be
nonhazardous. Not tested in oxygen enriched
atmospheres (above 21%).
NOTE: RKI Instruments, Inc. recommends that you refer to ISA-RP12.13,
Part II-1987 or an equivalent international recommended practice
for guidance in the use of combustible gas detection instruments.

1 • Introduction GX-2009 Operator’s Manual
Introduction
Using an advanced detection system consisting of four gas sensors, the
GX-2009 personal four-gas monitor detects the presence of combustible
gas, oxygen (O2), carbon monoxide (CO), and hydrogen sulfide (H2S)
simultaneously. The GX-2009’s compact size and easy-to-use design
makes it ideally suited for a wide range of applications, including sewage
treatment plants, utility manholes, tunnels, hazardous waste sites, power
stations, petrochemical refineries, mines, paper mills, drilling rigs, and fire
fighting stations. The GX-2009 offers a full range of features, including:
• Simultaneous four-gas monitoring and display of combustible gases,
O2, CO, and H2S
• Backlit LCD (liquid crystal display) for complete and understandable
information at a glance
• Distinctive audible/vibrating alarms for dangerous gas conditions and
audible alarms for unit malfunction
• Microprocessor control for reliability, ease of use, and advanced
capabilities
• Resistance to RF (radio frequency) interference
• Datalogging including interval trend data and alarm trend data
• STEL/TWA and over range alarm display
• Peak hold readouts
• Built-in time function
• Lightweight and compact high impact plastic case
• Rotatable alligator clip for “hands-free” gas monitoring, belt clip optional
• CSA classified for Class I, Division I, Groups A, B, C, and D hazardous
atmospheres
WARNING: The GX-2009 detects oxygen deficiency and elevated
levels of oxygen, combustible gases, carbon monoxide,
and hydrogen sulfide, all of which can be dangerous or
life threatening. When using the GX-2009, you must
follow the instructions and warnings in this manual to
assure proper and safe operation of the unit and to
minimize the risk of personal injury. Be sure to maintain
and periodically calibrate the GX-2009 as described in
this manual.
NOTE: Only the combustible gas detector portion of this instrument has
been assessed for performance.

GX-2009 Operator’s Manual Specifications • 2
Specifications
Table 1: Model GX-2009 Specifications
Target Gas Combustibles,
Methane (CH4)
calibration
standard*
Oxygen (O2) Hydrogen
Sulfide
(H2S)
Carbon
Monoxide
(CO)
Range
(Increment) 0-100% LEL (1% LEL) 0-40.0 vol% (0.1 vol%) 0-100.0 ppm (0.5 ppm) 0-500 ppm (1 ppm)
Detection
Method Diffusion
Response
Time T90 Within 30 Seconds
Accuracy ±5% ofreading
or ± 2% LEL
(whichever is
greater)
± 0.5% O2± 5% of
reading or
± 2 ppm H2S
(whichever is
greater)
± 5% of
reading or
± 5 ppm CO
(whichever is
greater)
Display Digital LCD
Gas Alarms
(Factory
Settings)
Alarm 1: 10%
LEL
Alarm 2: 50%
LEL
Over: 100%
LEL
Alarm 1: 19.5
vol%
(Decreasing)
Alarm 2: 23.5
vol%
Over: 40.0
vol%
Alarm 1: 5.0
ppm
Alarm 2: 30.0
ppm
Over: 100.0
ppm
TWA: 1.0 ppm
STEL: 5.0 ppm
Alarm 1: 25
ppm
Alarm 2: 50
ppm
Over: 300 ppm
TWA: 25 ppm
STEL: 200
ppm
Operating
Temperature
and Humidity
-20 to 50oC/Below 85% RH (Without Condensation)
Safety/
Regulatory C US
186718
CSA classified, “C/US”, as Intrinsically Safe. Exia. Class I, Groups A,
B, C, & D. Class I, Zone 0, Group IIC. Temperature Code T3C.
Power Supply NiMH Batteries (2.4 VDC Nominal), Direct Charging

3 • Specifications GX-2009 Operator’s Manual
NOTE: The bump test function in Calibration Mode is included in
instruments with firmware version 03955 or later installed. See
page 41 for a description of the bump test function. GX-2009
instruments shipped after May 2011 include the bump test
function. Instruments that have a serial number starting with
04516 or later shipped from the factory with the bump test function
available. Instruments that have a serial number starting with
04515 did not include the bump test function when shipped from
the factory. The factory setting for the bump test function is off.
Continuous
Operating
Hours
Up to 20 Hours (Non Alarm Operation After Full Charge)
Charge Time 3 hours for a full charge
Case High-impact Plastic, Dust and Water Resistant to IP-67
Required
Accessories AC or DC Charging Station, AC Charging Station Available For From 1 to 5 Instruments
Other
Accessories • IrDA/USB cable for downloading data to computer
• GX-2009 Data Logger Management Program (Windows®2000,
XP, Vista)
• GX-2009 Setup Program (Windows®2000, XP, Vista)
• Automatic Calibration Station
• Hand Aspirated Sample Draw Adapter with Hose and Probe
• Wrist Strap (included with every unit)
Dimensions
and Weight Dimensions: 2.7 H, 3.0 W, 1.0 D inches Approx. 70 H, 75 W, 25 D mm
Weight: 4.6 oz.
*The GX-2009 is also available set up for general hydrocarbons and calibrated to a
combustible gas other than methane, such as isobutane. Consult RKI Instruments,
Inc. for further information.
Table 1: Model GX-2009 Specifications

GX-2009 Operator’s Manual Description • 4
Description
This section describes the GX-2009’s components and the charging
station. These components include the GX-2009’s case, alligator and belt
clips, sensor retainer, sensor retainer gasket, sensor cover retainer,
scrubber filters, sensor cover, sensors, LCD, control buttons, printed circuit
boards, alarm LED arrays, buzzer, vibrator, batteries, and charging station.
POWER
MODE
AIR
LED Arrays
Front Buzzer
Sound Opening
IR Port
Top Buzzer
Sound Opening
H2SCO%LELO
2
RKI GX-2009
Sensor Diffusion Port, 4X
Control Buttons
Wrist Strap
Sensor Retainer
LCD
Sensor Cover, OverAll
Sensors
Sensor Cover Retainer
Figure 1: GX-2009, Front & Bottom View

5 • Description GX-2009 Operator’s Manual
Case
The GX-2009’s sturdy, high-impact plastic case is suitable for use in many
environmental conditions, indoors and out. The unit is dust proof and water
resistant. Rubber overmolded surfaces on much of the case help protect it
from impact damage and aid in holding the instrument in your hand.
A clear plastic window through which the LCD can be viewed is located on
the front of the case. Three brass charging contacts that areused when the
GX-2009 is placed in the charging station are on the back of the case. Four
sensor diffusion ports are located on the bottom of the case. The ports are
labelled as follows from left to right: H2S, CO, HC, and O2. Three frosted
windows, one on the left side, one of the right side, and one on top, cover
alarm LED arrays. There are two buzzer sound openings, one on the front
below the LCD and one on the top behind the top LED array. An IR
(infrared) communication port is located on the top left side which is used
to transfer information when the instrument is used with one of the
calibration or downloading accessories.
There are three threaded inserts on the back of the case. These are used
to mount the alligator clip or the optional belt clip.
Threaded Inserts
Battery Charging Contacts
Figure 2: GX-2009 Rear View

GX-2009 Operator’s Manual Description • 6
Alligator & Belt Clips
The GX-2009 is available with two types of clips, the standard alligator clip
and the optional belt clip. Both are illustrated in Figure 3.
The alligator clip can be used to attach the GX-2009 to clothing or a belt.
Teeth in the alligator clip’s jaws prevent the unit from slipping off. The
alligator clip can be rotated to change how the instrument is oriented when
worn. The belt clip is used to easily clip the GX-2009 on a belt.
Sensor Retainer/Sensor Retainer Gasket/
Sensor Cover Retainer
The sensor retainer holds the gas sensors in place and snaps onto the
bottom of the case. It has 4 diffusion ports, one for each sensor, and has
recessed areas in it for the charcoal filter, and the H2S removal filters. It
also has indexing features for the sensor retainer gasket. The sensor
retainer gasket seats onto the sensor retainer and seals the interface
between the sensor retainer, sensor cover, and sensor cover retainer. The
sensor cover retainer snaps onto the sensor retainer. Two screws secure
the sensor retainer and the sensor cover retainer to the case.
Scrubber Filters/Sensor Cover
Charcoal Filter Disk
The charcoal filter disk is located in the CO sensor diffusion port of the
sensor retainer. It is black, has a woven texture, and is impregnated with an
H2S absorbing material. It fits into a recessed area of that port. The CO
Alligator Clip Belt Clip
Figure 3: Alligator and Belt Clips

7 • Description GX-2009 Operator’s Manual
sensor will respond if exposed to H2S and certain hydrocarbon gasses.
The charcoal filter scrubs these gasses out of the gas sampled to avoid
false CO readings. The H2S absorbing material added to the charcoal filter
extends it’s H2S absorbing life. If false CO readings are noticed, especially
high readings in the presence of H2S, change the charcoal filter disk.
H2S Removal Filter Disks
One H2S removal filter disk is located in a recessed area of the
combustible gas sensor diffusion port in the sensor retainer. It prevents
H2S in the ambient air from reaching the unit’s combustible gas sensor.
Removing H2S that is present in the monitored air prolongs the life of the
sensor. The H2S filter disk is dark red in color and although it may darken
over time, its color isnot indicative of remaining filter life. The H2S filter disk
can absorb H2S for 33 ppm hours and should be replaced after that much
exposure. With this many ppm hours of absorption, the H2S filter disk
should be replaced after 80 minutes of exposure to 25 ppm H2S. This
equates to replacing the H2S filter disk after 40 2-minute calibrations with a
cylinder containing 25 ppm H2S. If H2S exists in the monitoring
environment, the H2S filter disk will have to be replaced more frequently.
Sensor Cover
The sensor cover is white and protects the scrubber filters and sensors
from dust and water. It fits on the sensor retainer gasket over all the sensor
diffusion ports and is secured in place by the sensor cover retainer. If the
sensor cover becomes dirty, the response time and accuracy of the GX-
2009 will be affected. Replace the sensor cover if it appears dirty.
Sensors
The GX-2009 uses four sensors to monitor combustible gases, O2, CO,
and H2S simultaneously. The sensors are protected from the environment
by the sensor cover which allows ambient air to diffuse to the sensors. The
sensors use different detection principles, as described below.
Combustible Gas (LEL) Sensor
The combustible gas sensor detects combustible gas and vapors in the
LEL (lower explosive limit) range with a catalytic element. A sintered metal
flame arrestor covers the element and allows ambient air to diffuse into the
sensor. The reaction of gas with oxygen on the catalyst causes a change in
the resistance of the element which affects the current flowing through it.
The current is amplified by the GX-2009’s circuitry, converted to a
measurement of combustible gas concentration, and displayed on the
LCD.

GX-2009 Operator’s Manual Description • 8
CAUTION: Do not expose the combustible sensor to high concentrations
of combustible gas such as that from a butane lighter.
Exposure to high concentrations of combustible gas may
adversely affect the performance of the sensor.
Oxygen (O2) Sensor
The O2sensor is a galvanic type sensor. A membrane covers the cell and
allows gas to diffuse into the cell at a rate proportional to the partial
pressure of oxygen. The oxygen reacts in the cell and produces a voltage
proportional to the concentration of oxygen. The voltage is measured by
the GX-2009’s circuitry, converted to a measurement of gas concentration,
and displayed on the LCD.
CO and H2S Sensors
The CO and H2S sensors are electrochemical sensors that consist of two
precious metal electrodes in an acid electrolyte. A gas permeable
membrane covers the sensor face and allows gas to diffuse into the
electrolyte. The gas reacts in the sensor and produces a current
proportional to the concentration of the target gas. The current is amplified
by the GX-2009’s circuitry, converted to a measurement of gas
concentration, and displayed on the LCD.
LCD
The LCD (liquid crystal display) is visible through the GX-2009’s front
window. Target gas concentrations, the time, battery condition, and alarm
indications are displayed on the LCD. When either of the control buttons
are pressed, the LCD backlight comes on for 30 seconds.

9 • Description GX-2009 Operator’s Manual
Control Buttons
Two control buttons are located below the display on either side of the front
buzzer opening. The AIR button is on the left and the POWER MODE
button is on the right. The functions performed by the control buttons are
summarized in the following table:
Printed Circuit Boards
The primary function of the GX-2009’s printed circuit boards is to amplify
the signal sent to them from the four gas sensors, convert the signal to a
measurement of gas concentration, display the gas concentration on the
LCD, store peak, STEL, and TWA readings, and activate the alarm circuit if
an alarm point has been reached. They monitor battery level, battery
failure, and sensor failure. They also control the GX-2009’s time function
and various operating modes.
NOTE: The printed circuit boards contain no user serviceable parts.
Alarm LED Arrays
Three red alarm LED (light emitting diode) arrays are visible through
frosted plastic lenses in the case. One is on the top, one on the left side,
one on the right side of the case. The alarm LED arrays alert you to gas,
low battery, and failure alarms.
Table 2: GX-2009 Control Buttons
Button Function
POWER MODE
• Turns the unit on and off
• Turns the LCD back light on
• Scrolls through Display Mode
• Resets the alarm circuit (gas alarms)
• Enters Calibration Mode with the AIR button
• Enters User Setup Mode with the AIR button
• Selects a displayed item
• Saves adjusted parameters
• Selects displayed parameters
AIR
• Turns the LCD back light on.
• Performs a fresh air adjustment
• Enters Calibration Mode with the MODE POWER
button.
• Enters User Setup Mode with the MODE POWER
button.
• Adjusts or changes displayed parameters

GX-2009 Operator’s Manual Description • 10
Buzzer & Vibrator
A solid-state electronic buzzer is mounted inside the GX-2009’s case. The
buzzer sounds for gas alarms, failure alarms, and as an indicator during
normal use of the GX-2009’s various operating modes.
A vibrating motor inside the GX-2009 case vibrates for gas alarms and as
an indicator during normal use of the GX-2009’s various operating modes.
NiMH Batteries
Two NiMH (nickel metal hydride) batteries, each with an integral holder,
supply 2.4 volts to power the GX-2009. The batteries will run the unit for up
to 20 hours when no alarms have been activated during that time period.
The batteries are designed to be charged while in the GX-2009 with the
GX-2009 Charging Station. The batteries should not be removed from the
GX-2009 unless they need to be replaced because they will no longer hold
a charge. The battery icon in the lower left corner of the LCD shows the
charge remaining in the batteries. See “Recharging the GX-2009’s NiMH
Batteries” on page 56 for instructions to recharge the batteries and
“Replacing the GX-2009’s NiMH Batteries” on page 60 for instructions to
replace the batteries.
Charging Station
The GX-2009’s NiMH batteries are charged with the GX-2009 Charging
Station. There are two types of charging stations available, the standard
AC powered charging station and the optional vehicle plug DC powered
charging station.
AC Powered Charging Station
The standard AC powered charging station is available in configurations
that charge from one to five instruments at a time. The single instrument
charging station consists of one instrument charging base and an AC
adapter. The AC adapter for the standard charging station plugs into a 115
VAC wall outlet and connects to the charging station with a jack on the end
of a five foot DC output cable. The AC adapter will also work for 100 VAC
or 220 VAC if an appropriate plug adapter is provided. The single
instrument AC charging station is shown in Figure 4.

11 • Description GX-2009 Operator’s Manual
Adapter Jack
Charge LED
Instrument
Retaining
Tabs
Adapter Jack
Charging
Contacts
Top ViewRear View
AC Adapter
Charging Base
Figure 4: GX-2009 Charging Station, Single Instrument Station

GX-2009 Operator’s Manual Description • 12
Charging stations for more than one instrument include additional chargers
that are attached to each other. The same AC adapter can power up to a
maximum of 5 charging bases. The two instrument charging station is
shown in Figure 5, and the five instrument station is shown in Figure 6.
AC Adapter
Adapter Jack
Figure 5: GX-2009 Charging Station, Two Instrument Station
Adapter Jack
AC Adapter
Figure 6: GX-2009 Charging Station, Five Instrument Station

13 • Description GX-2009 Operator’s Manual
DC Powered Charging Station
An optional DC powered single instrument charging station is available with
a vehicle plug 12 VDC adapter. The DC adapter for the charging station
can only provide enough power to charge one instrument at a time, so the
DC powered charging station is only available as a single instrument
charging station. It uses the same charging base as the AC powered
charging station.
Charge LED
Instrument
Retaining
Tabs
Adapter Jack
Top View
Adapter Jack
Rear View
Charging
Contacts
Vehicle Plug
DC Adapter
Charging Base
Figure 7: GX-2009 DC Powered Charging Station

GX-2009 Operator’s Manual Start Up • 14
Start Up This section explains how to start up the GX-2009 and get it ready for
operation.
Start-up Procedure
1. Press and briefly hold down the POWER MODE button. The backlight
will turn on and all the display segments will turn on. Release the button
when you hear a beep.
2. The vibrator vibrates and the alarm lights flash momentarily.
3. If Cal. Limit Display is turned on, the screen that appears next
depends on how Cal. Limit Check is set. These parameters and the
Auto Zero Adjustment parameter mentioned in Step 9 below cannot
be set using the GX-2009’s instrument menus, but are set using the
GX-2009 Setup Program. See the GX-2009 Setup Program Operator’s
Manual for information regarding changing various instrument
parameters that are not available for adjustment in the instrument’s
operating modes.
• If the unit is due for calibration and Cal. Limit Check is set to
Confirm to use, then the following screen displays.
The alarm LED’s and buzzer will pulse several times. After this,
press and release the POWER MODE button. You will hear a beep
and startup sequence will continue.
• If the unit is due for calibration and Cal. Limit Check is set to Can’t
use, then the following screen displays.
The alarm LED’s and buzzer will pulse several times. This screen
will then remain on the display until the unit is turned off. The GX-
2009 cannot be used until a complete calibration has been
performed either by selecting AUTO CAL or ONE CAL in the
Calibration Mode menu. See “Performing a Span Adjustment in
AUTO CAL” on page 32 or “Performing a Span Adjustment in ONE
CAL” on page 37 for calibration instructions.
CAL
C--LIMIT
FAIL
C--LIMIT

15 • Start Up GX-2009 Operator’s Manual
• If calibration is not due or Cal. Limit Check is set to None, then the
following screen appears for a few seconds indicating when the next
calibration is due.
NOTE: The following screen only appears if Bump Test Limit Display is
set to On using the User Setup Program. The standard factory
setting for this function is Off.
4. If Bump Test Limit Display is set to On using the User Setup Program,
the next screen will depend on how Bump Limit Check is set using the
User Setup Program.
• If the unit is due for bump testing and Bump Test Limit Check is set
to Confirm to use, then the following screen displays.
The alarm LED’s and buzzer will pulse several times. After this,
press and release the POWER MODE button. You will hear a beep
and startup sequence will continue.
WARNING:You must press the POWER MODE button to continue to
normal operation. If you do not press the POWER MODE
button, the buzzer will continue to beep and the LEDs will
continue to flash for 6 seconds every 5 seconds and the
unit will not enter normal operation.
• If the unit is due for bump testing and Bump Test Limit Check is set
to Can’t use, then the following screen displays.
The alarm LED’s and buzzer will pulse several times. This screen
will then remain on the display until the unit is turned off. The GX-
2009 cannot be used until a bump test has been performed. See
“Performing a Bump Test in BUMP” on page 41 for bump test
procedures.
08 - 7.27
NEXT CAL
15 d
tESt
BUMP NOW
FAIL
BUMP NOW