RKI Instruments GX-6000 User manual

www.rkiinstruments.com
GX-6000
Single Sensor PID Model
Operator’s Manual
Part Number: 71-0363
Revision: 0
Released: 8/10/17

GX-6000 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-6000 Operator’s Manual Table of Contents
Table of Contents
Chapter 1: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
About the GX-6000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Chapter 2: Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Instrument Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Control Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Flashlight LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Alarm LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Infrared Communications Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Vibrator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Printed Circuit Boards (PCBs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Flow Chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Inlet Filter Holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Batteries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Included Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Tapered Rubber Nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Belt Clip. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Rubber Boot. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Wrist Strap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Sample Hose and Probe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Screen Protector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Other Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
VOC Zero Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
DIN Rail Mounting Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table of Contents GX-6000 Operator’s Manual
Chapter 3: Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Turning On the GX-6000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Performing a Demand Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Turning Off the GX-6000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Measuring Mode, Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Monitoring an Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Using Optional Sample Hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Snap Log Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Measuring Mode, Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Alarm Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Responding to Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Tips for Using Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
PID Gas Name Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Peak Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
STEL Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
TWA Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
View Alarm Settings Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Time in Operation Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Date/Time, Battery Voltage Screen . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Log Time Remaining Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Clear Data Logging Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Pump Off Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Select User ID Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Select Station ID Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Viewing Snap Logger Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Peak Bar Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Gas Display Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
LCD Flip Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
LCD Background Color Flip Screen . . . . . . . . . . . . . . . . . . . . . . . . . 57
Language Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Data Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

GX-6000 Operator’s Manual Table of Contents
Chapter 4: Calibration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Calibration Supplies and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Entering Calibration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Calibrating Using the Auto Calibration Method . . . . . . . . . . . . . . . . . . . . . 61
Setting the Fresh Air Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Performing a Span Adjustment in Auto Calibration . . . . . . . . . . . . . 63
Returning to Measuring Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Calibrating Using the Single Calibration Method . . . . . . . . . . . . . . . . . . . . 69
Setting the Fresh Air Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Performing a Span Adjustment in Single Calibration . . . . . . . . . . . 70
Performing a Bump Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Chapter 5: User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Tips for Using User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Entering User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Setting the Date and Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Setting the Date Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Configuring the Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Updating the Language Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Viewing the ROM/SUM of the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . 84
Turning the Password Function On or Off. . . . . . . . . . . . . . . . . . . . . . . . . . 85
Exiting User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Chapter 6: Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Replacing or Recharging the Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Replacing the Alkaline Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Replacing the Lithium Ion Battery Pack . . . . . . . . . . . . . . . . . . . . . . 91
Recharging the Lithium Ion Battery Pack . . . . . . . . . . . . . . . . . . . . . 93
Recharging the Lithium Ion Battery Pack Out of the Instrument . . . 95
Replacing the Probe’s Particle Filter and Hydrophobic Filter Disk . . . . . . 98
Replacing the PID Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Replacing the Hydrophobic Filter and Wire Mesh Disk . . . . . . . . . . . . . . 102

Table of Contents GX-6000 Operator’s Manual
PID Sensor Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Cleaning the PID Sensor’s Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Replacing the PID Sensor’s Lamp. . . . . . . . . . . . . . . . . . . . . . . . . . 107
Replacing the PID Sensor’s Electrode Stack. . . . . . . . . . . . . . . . . . 110
General Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Appendix A: Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Tips for Using Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Using Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Setting the Date and Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Setting the Date Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Performing a Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Performing a Bump Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Updating Calibration Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Updating Bump Test Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Updating Alarm Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Turning the Pump On/Off Display On or Off . . . . . . . . . . . . . . . . . 134
Turning the User/Station ID Function On or Off . . . . . . . . . . . . . . 135
Updating the Backlight Time Setting. . . . . . . . . . . . . . . . . . . . . . . . 135
Updating the Language Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Updating the Lunch Break Setting. . . . . . . . . . . . . . . . . . . . . . . . . . 136
Updating the Auto Zero Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Updating the Demand Zero Setting . . . . . . . . . . . . . . . . . . . . . . . . . 137
Zero Follower Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Zero Suppression Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Updating the Autoranging Setting. . . . . . . . . . . . . . . . . . . . . . . . . . 137
Updating the Confirmation Alert Setting. . . . . . . . . . . . . . . . . . . . . 137
Turning the Key Tone Noise On or Off . . . . . . . . . . . . . . . . . . . . . . 138
Turning Inert Mode On or Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Updating the Leak Check/Bar Hole Mode Setting. . . . . . . . . . . . . . 138
Setting the Bar Hole Measurement Time. . . . . . . . . . . . . . . . . . . . . 138
Updating the CO Display Setting . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Updating the Man Down Settings . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Updating the Datalogging Parameters . . . . . . . . . . . . . . . . . . . . . . 141
Adjusting the Low Flow Setpoint. . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Viewing the ROM/SUM of the Instrument . . . . . . . . . . . . . . . . . . . . 144
Turning the Password Function On or Off . . . . . . . . . . . . . . . . . . . 144

GX-6000 Operator’s Manual Table of Contents
Restoring the Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Exiting Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Appendix B: 10.0 eV/Benzene PID Sensor . . . . . . . . . . . . . . . . . . . 148
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Sensor Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Tube and Tube Holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Tube Holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Display Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Measuring Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Benzene Select Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Viewing Benzene Select Mode Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Calibrating the 10.0 eV/Benzene PID Sensor . . . . . . . . . . . . . . . . . . . . . . 160
Important Calibration Information . . . . . . . . . . . . . . . . . . . . . . . . . 160
Performing an AUTO CAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Performing a SINGLE CAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Performing a TUBE CAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Entering a CAL CODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
PID Sensor Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Replacing a Tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
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 • Overview GX-6000 Operator’s Manual
Chapter 1: Introduction
Overview
This chapter briefly describes the GX-6000 Single Sensor PID Model gas
monitor. This chapter also describes the GX-6000 Single Sensor PID Model
Operator’s Manual (this document). Table 1 at the end of this chapter lists the
specifications for the GX-6000 Single Sensor PID Model (hereafter referred
to as the GX-6000).
About the GX-6000
The GX-6000’s rugged, reliable, 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-6000 offers a full range of features including:
• VOC monitoring
• Sample-drawing pump with up to 50 foot range
• Liquid crystal display (LCD) for complete and understandable
information at a glance
• Ultrabright alarm LEDs
• Distinctive audible/vibrating alarms for dangerous gas conditions and
audible alarms for unit malfunction
• Microprocessor control for reliability, ease of use, and advanced
capabilities
• Data logging functions
• Alarm trend data
• STEL and TWA (for high range PID only) and over range alarms
• Peak reading
• Built-in time function
• Lunch break feature
• RF shielded high impact plastic case
• CSA classification for Class I, Division I, Groups A, B, C, and D
hazardous atmospheres

GX-6000 Operator’s Manual About the GX-6000 • 2
WARNING: The Model GX-6000 detects elevated levels of VOC gases
which can be dangerous or life threatening. When using the
GX-6000, 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-6000 as described
in this manual.

3 • Specifications GX-6000 Operator’s Manual
Specifications
Table 1: Sensor Specifications/Alarm Points
Table 2: GX-6000 Specifications
VOCs, Isobutylene Calibration Standard
Low Range PID High Range PID
Detection Range 0 - 50000 ppb 0 - 6000 ppm
Reading Increment • 0 - 5000: 1 ppb
• 5000 - 50000: 10 ppb
• 0 - 600 ppm: 0.1 ppm
• 600 - 6000 ppm: 1 ppm
Alarm 1
Factory Setting
5000 ppb 400 ppm
Alarm 2
Factory Setting
10000 ppb 1000 ppm
STEL Alarm n/a 60.0 ppm
TWA Alarm n/a 42.0 ppm
Sampling
Method
Sample Draw
Response
Time
T90 Within 30 Seconds
Display Graphics LCD Display
Operating
Temperature
& Humidity
-20°C to 50°C/Below 95% RH (Without Condensation)
Safety/
Regulatory
• ATEX: II 1 G Ex ia IIC T4 Ga
Certificate Number Presafe 15ATEX6171
• IECEx: Ex ia IIC T4 Ga
Certificate Number PRE 15.0011
• CSA classified as Intrinsically Safe. Exia. Class I, Groups A, B, C, & D.
Temperature Code T3A.
186718
Power
Supply
• Three AA size alkaline batteries
OR
• One lithium ion battery pack

GX-6000 Operator’s Manual Specifications • 4
Continuous
Operating
Hours
@ 25 °C
• Alkaline Batteries: 20 Hours (Non Alarm Operation, Fully Charged)
• Li-ion Battery Pack: 25 Hours (Non Alarm Operation, Fully Charged)
Case High-impact Plastic, RF Shielded, Dust and Weather Proof
Included
Accessories
•Belt clip
• Red rubber boot
• Wrist strap
• Tapered nozzle
• Screen protector
• 3 foot hose and probe
• VOC zero filter (included for instruments with a low range PID sensor)
Other
Accessories
• Alkaline Battery Pack
• Rechargeable Li-ion Battery Pack
• 115 VAC Charger
• 12 VDC Charger
• Hose/Probes of Various Lengths, See “General Parts List” on page 113.
• VOC Zero Filter (optional for instruments with a high range PID sensor)
• DIN Rail Mounting Assembly (for mounting chargers to the wall)
• Product CD, includes Data Logger Management Program
• IrDA/USB Cable for connecting to a computer when using the Data Logger
Management Program (not needed if computer has an infrared port)
Dimensions
and Weight
Approximately 200(H) x 68(W) x 52(D) mm (7.9”H x 2.7”W x 2.0”D)
Approximately 400 g (14 oz.)

5 • About this Manual GX-6000 Operator’s Manual
About this Manual
Although the GX-6000 can support up to 6 sensors, this manual specifically
describes an instrument with only a PID sensor installed.
The GX-6000 Single Sensor PID Model 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.
The GX-6000 Single Sensor PID Model Operator’s Manual is organized as
follows:
•Chapter 1 is an introduction to the GX-6000.
• Chapter 2 describes the components of the GX-6000.
• Chapter 3 describes the operation of the GX-6000.
• Chapter 4 describes Calibration Mode which allows you to calibrate the
GX-6000.
• Chapter 5 describes the GX-6000’s User Mode.
• Chapter 6 describes the GX-6000’s maintenance requirements and
procedures.
• Appendix A describes Maintenance Mode which allows you to configure
different parameters of the GX-6000.
• Appendix B describes the 10.0 eV/benzene PID sensor.

GX-6000 Operator’s Manual Overview • 6
Chapter 2: Description
Overview
This chapter describes the GX-6000 instrument and accessories.
Instrument Description
The GX-6000 includes the case, LCD, control buttons, flashlight LED, alarm
LEDs, infrared communication port, buzzer, vibrator, printed circuit board,
pump, flow chamber, sensor, filters, inlet filter holder, and batteries.
Figure 1: Component Location
Case
The GX-6000’s sturdy, high-impact plastic case is radio frequency (RF)
resistant and is suitable for use in many environmental conditions, indoors
and out. The case is dust proof and water resistant. A clear plastic window is
located on the front of the case. The battery pack and flow chamber are
located on the back of the GX-6000. The inlet filter holder is located on the
top of the GX-6000 case.
Inlet Filter
Holder
Flow
Chamber
Battery
Pack
Flashlight LED
Alarm LEDs
RKI GX-6000
DISP
LOCK
(PANIC)
AIR
SHIFT
RESE T
Infrared
Communications
Port
Control Buttons
LCD
POWER/ENTER

7 • Instrument Description GX-6000 Operator’s Manual
LCD
A digital LCD (liquid crystal display) is visible through a clear plastic
window in the top case. The LCD shows the gas reading. The LCD also
shows information for each of the GX-6000’s operating modes.
Control Buttons
Five control buttons are located below the LCD. They are, from left to right
and top to bottom, DISP/LOCK, ▲ AIR, SHIFT ▼ (PANIC), POWER/
ENTER, and RESET.
Flashlight LED
A white LED is visible through a round, raised, frosted lens in the top of the
case. This LED can be used to provide extra light, if necessary. The RESET
button turns this LED on and off.
Table 3: GX-6000 Control Button Functions
Button Function(s)
DISP/LOCK • activates Display Mode
• enters instructions into the GX-6000’s microprocessor
• allows you to exit a menu without saving changes
• locks screen orientation in any mode if INVERSION SELECT
is set to ON
▲ AIR • activates the demand zero function (adjusts the GX-6000’s
fresh air reading)
• enters instructions into the GX-6000’s microprocessor
• moves the cursor on the LCD up the screen
• increases the value of a parameter available for adjustment
• scrolls through parameter options
SHIFT ▼ (PANIC) • enters instructions into the GX-6000’s microprocessor
• moves the cursor on the LCD down the screen
• decreases the value of a parameter available for adjustment
• scrolls through parameter options
• initiates a Panic alarm in any mode if PANIC is set to ON
POWER/ENTER • turns the GX-6000 on and off
• enters instructions, values, and settings into the GX-6000’s
microprocessor
RESET • silences and resets audible alarm if ALARM LATCHING is set
to LATCHING and ALARM SILENCE is set to ON
• turns the flashlight LED on and off

GX-6000 Operator’s Manual Instrument Description • 8
Alarm LEDs
Five sets of red alarm LEDs (light emitting diodes) border the LCD. The
alarm LEDs alert you to gas, low battery, and failure alarms.
Infrared Communications Port
An infrared (IR) communications port is located on the front of the case,
below the POWER/ENTER button. The data transmitted through the port is
in standard IrDA protocol. A computer’s infrared port or an IrDA/USB cable
connected to a USB port can be used to download data saved by the GX-6000
to a computer using the GX-6000 Data Logger Management Program. See
the GX-6000 Data Logger Management Program operator’s manual for data
logging and downloading instructions.
Buzzer
One solid-state electronic buzzer is located inside the case. Holes on the top
front of the case allow the sound to exit the case. The buzzer sounds for gas
alarms, malfunctions, low battery voltage, and as an indicator during use of
the GX-6000’s many display and adjustment options.
Vibrator
A vibrating motor inside the GX-6000 case vibrates for gas alarms, unit
malfunctions, and as an indicator during normal use of the various modes of
the GX-6000.
Printed Circuit Boards (PCBs)
The GX-6000 printed circuit boards analyze, record, control, store, and
display the information collected. The circuit boards are located inside the
case. They are not user serviceable.
Pump
A diaphragm pump inside the GX-6000 draws the sample to the sensor. It can
draw sample from as far as 50 feet from the GX-6000. The pump is not user
serviceable.
CAUTION: Sample hose lengths of more than 50 feet are not recommended
for the GX-6000 because of flow rate reduction.
Flow Chamber
The flow chamber is on the back of the GX-6000 and is held in place by four
Phillips screws. The flow chamber seals to the rubber sensor gasket which
seals to the sensor face inside the GX-6000 and routes flow from the pump to
the sensor and to the exhaust port (on the top of the GX-6000 case).

9 • Instrument Description GX-6000 Operator’s Manual
Sensors
PID Sensor
Two types of PID sensors can be used with the GX-6000, a low range (higher
sensitivity) sensor and a high range (lower sensitivity) sensor (see Table 1 for
specifications).
The PID sensor is a cylindrical sensor with a diffusion opening on the front
and 3 pins on the back. It is installed in a white housing that has three sockets
on the bottom that mate with the GX-6000 instrument. The PID sensor must
always be installed in the first smart sensor position which is located in the
top left corner of the sensor block.
The standard calibration for a PID channel is to isobutylene. A PID channel
can be factory setup for and calibrated to other gases. Consult RKI
Instruments, Inc. for other available PID configurations and to specify the
desired PID configuration when a unit is ordered.
Dummy Sensors
This version of the GX-6000 has 5 dummy sensors installed in the unused
sensor positions. Dummy sensors are factory installed. The flat top of the
dummy sensor should face up and the bottom hollow side should face down.
Inlet Filter Holder
The filter holder is a clear plastic dome shaped piece on the top of the case. A
male quick connect fitting is located on the inlet filter holder. This is the
GX-6000’s inlet fitting. The filter holder may be removed by turning it
counterclockwise and pulling it away from the case. One flat membrane disk
hydrophobic filter, a wire mesh disk, and a rubber filter retaining gasket are
held in place by the filter holder and are located in the bottom of the case
chamber where the filter holder is installed.
Batteries
Three AA-size alkaline batteries or a rechargeable lithium ion battery pack
(4.1 VDC) power the GX-6000. Instrument run time is dependent upon
battery type. At 25°C the alkaline batteries last at least 20 hours and the
lithium ion battery pack lasts at least 25 hours. The battery icon in the upper
right of the LCD shows remaining battery life.
When the GX-6000 detects a low battery voltage, a low battery warning is
activated. When battery voltage is too low for Measuring Mode, the
GX-6000 sounds a dead battery alarm.
The alkaline batteries can be replaced by removing the battery cover on the
back of the case. The lithium ion pack can be replaced by removing the entire
battery pack. The battery pack release latch is located on the bottom of the

GX-6000 Operator’s Manual Included Accessories • 10
instrument. When viewing the instrument from the bottom with the LCD
facing down, push the battery pack release latch toward the right to release
the pack.
The lithium ion battery pack can be recharged by placing the GX-6000 in its
battery charging station or by placing the battery pack in the charging station.
NOTE: Use of batteries or battery chargers not specified by RKI
Instruments, Inc. will compromise the CSA classification and may
void the warranty. See “Replacing or Recharging the Batteries” on
page 89.
WARNING: To prevent ignition of a hazardous atmosphere, batteries
must only be changed or charged in an area known to be
nonhazardous.
AVERTISSEMENT:Pour éviter l’inflammation d’une atmosphère
dangereuse, les batteries doivent uniquement être modifiés
ou facturés dans une zone connue comme non dangereuse.
Included Accessories
Included accessories consist of the tapered rubber nozzle, belt clip, rubber
boot, wrist strap, and the sample hose/probe.
Tapered Rubber Nozzle
A cone shaped 4 inch long rubber nozzle is included with the GX-6000 as
standard. It can be installed on the inlet fitting by pushing the larger end over
it. The smaller end can be inserted through a hole in a wall or some other
access to an enclosed area to sample the environment.
Belt Clip
A belt clip can be mounted to the back of the case using 3 Phillips head
screws. The belt clip allows the GX-6000 to be securely attached to a belt.
Rubber Boot
A red protective rubber boot can be installed over the GX-6000.
Wrist Strap
A wrist strap is included with the GX-6000 and can be attached to the right or
left wrist strap installation feature on the GX-6000 case.

11 • Included Accessories GX-6000 Operator’s Manual
Sample Hose and Probe
A 3 foot sample hose with an attached probe is standard with the GX-6000.
When desired, the rubber nozzle may be removed and the sample hose and
probe may be connected to the inlet fitting. Sample hose lengths are available
from 3 feet to 50 feet (see “General Parts List” on page 113). The quick
connect end of the sample hose connects to the inlet fitting of the GX-6000.
The probe is integral with the hose and connects to it with a tube fitting.
CAUTION: Sample hose lengths of more than 50 feet are not recommended
for the GX-6000 because of flow rate reduction.
The probe includes a replaceable particle filter and hydrophobic filter disk
that prevent particulates and water from entering the GX-6000’s flow system.
See “Replacing the Probe’s Particle Filter and Hydrophobic Filter Disk” on
page 98 for instructions to replace the particle filter and hydrophobic filter
disk.
Figure 2: Sample Hose and Probe

GX-6000 Operator’s Manual Included Accessories • 12
Screen Protector
The clear screen protector can be installed over the GX-6000’s LCD to
prevent it from getting scratched.
1 . Remove the GX-6000’s rubber boot.
2 . Orient the GX-6000 so that the LCD is as horizontal as possible.
3 . Clean the LCD with rubbing alcohol.
4 . Place 1 drop of water in the center of the LCD.
5 . Grasp the tab at the top of the screen protector’s backing and pull it away
from the screen protector.
6 . Use needle-nose pliers or tweezers to handle the screen protector.
7 . Align the top of the screen protector with the top of the “RKI GX-6000”
logo.
8 . Press down on the center of the screen protector. Water should spread out
along the entire surface of the screen protector between the screen
protector and the LCD. Some of the water may come out the edges.
9 . If you are unhappy with the initial placement of the screen protector, lift
the screen protector up from a corner. Quickly rearrange the screen
protector and set it back down on the LCD.
10 . Use a small, stiff piece of plastic and, working your way out from center,
remove any air bubbles. The screen protector may shift during this
process so be sure to hold it securely with your other hand.
11 . Allow enough time for the water between the screen protector and the
LCD to dry before handling the GX-6000.
12 . Reinstall the rubber boot.

13 • Other Accessories GX-6000 Operator’s Manual
Other Accessories
Several other accessories are available for the GX-6000. This section
describes the VOC zero filter and the DIN rail. Data logging accessories are
briefly described in “Data Logging” on page 58.
VOC Zero Filter
The VOC zero filter scrubs out low levels of VOC gases using charcoal. A
VOC zero filter is included as standard with GX-6000s that include a low
range PID sensor since this sensor is more susceptible to low levels of VOCs.
A VOC zero filter is not included with GX-6000s that include a high range
PID sensor. Use the VOC zero filter when performing an air adjust on a PID
sensor in an area that may have a low-level VOC background. The tubing
stub on the end of the filter should be used to connect the filter to the inlet
fitting or probe. Be sure the arrow on the filter is pointing toward the GX-
6000.
Figure 3: VOC Zero Filter
DIN Rail Mounting Assembly
Two different DIN rail mounting assemblies are available for the GX-6000’s
charger. Each assembly has two end clamps but one assembly is long enough
to accommodate 1 charger and the other assembly is long enough to
accommodate 4 chargers.
Figure 4: DIN Rail Dimensions
1 . Use #10 screws to mount the DIN rail to the wall.
VOC Zero Filter
Tubing Stub
4" for 1-Charger Model
14" for 4-Charger Model
Use #10 Screws to Mount
1.38"