RKI Instruments GX-6000 Operating Manual
GX-6000
Operator’s Manual
Part Number: 71-0362
Revision: L
Released: 6/27/19
www.rkiinstruments.com
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 y ou have and th e sensor
types. Typical calibration frequencie s 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
Chapter 1: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
About the GX-6000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Chapter 2: Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Instrument Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Control Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Flashlight LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Alarm LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Infrared Communications Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Vibrator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Printed Circuit Boards (PCBs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Flow Chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Inlet Filter Holder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Included Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Tapered Rubber Nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Belt Clip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Rubber Boot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Wrist Strap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Sample Hose and Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Screen Protector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Other Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
VOC Zero Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
External Dilution Fitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
DIN Rail Mounting Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Chapter 3: Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Turning On the GX-6000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Performing a Demand Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Turning Off the GX-6000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
GX-6000 Operator’s Manual
Measuring Mode, Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Monitoring an Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Using Optional Sample Hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Combustible Gas Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
VOC Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Oxygen Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Snap Log Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Measuring Mode, Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Alarm Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Responding to Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Tips for Using Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
PID Gas Name Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Peak Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
STEL Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
TWA Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
View Alarm Settings Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Time in Operation Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Date/Time, Battery Voltage Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Log Time Remaining Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Clear Data Logging Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Pump Off Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Select User ID Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Select Station ID Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Viewing Snap Logger Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Peak Bar Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Gas Display Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
LCD Flip Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Combustible Sensor Protection Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
LCD Background Color Flip Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Language Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Data Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Chapter 4: Calibration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Calibration Supplies and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Entering Calibration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Calibrating Using the Auto Calibration Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Setting the Fresh Air Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Performing a Span Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Returning to Measuring Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Calibrating Using the Single Calibration Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Setting the Fresh Air Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Performing a Span Adjustment in Single Calibration . . . . . . . . . . . . . . . . . . . . . 83
Performing a Bump Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
GX-6000 Operator’s Manual
Chapter 5: User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Tips for Using User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Entering User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Setting the Date and Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Setting the Date Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Configuring the Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Updating the Language Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Viewing the ROM/SUM of the Instrument. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Turning the Password Function On or Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Exiting User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Chapter 6: Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Replacing or Recharging the Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Replacing the Alkaline Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Replacing the Lithium Ion Battery Pack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Recharging the Lithium Ion Battery Pack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Recharging the Lithium Ion Battery Pack Out of the Instrument. . . . . . . . . . . . 107
Replacing the Probe’s Particle Filter and Hydrophobic Filter Disk . . . . . . . . . . . . . . . 110
Replacing the H
Replacing a Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Replacing the Hydrophobic Filter and Wire Mesh Disk. . . . . . . . . . . . . . . . . . . . . . . . . 116
PID Sensor Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Cleaning the PID Sensor’s Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Replacing the PID Sensor’s Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Replacing the PID Sensor’s Electrode Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
S Scrubber Disk and the Charcoal Filter . . . . . . . . . . . . . . . . . . . . . . 111
2
Chapter 7: General Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Appendix A: Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Entering Maintenance Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Using Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Setting the Date and Time (DATE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Setting the Date Format (DATE FORMAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Performing a Calibration (GAS CALIBRATION) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Performing a Bump Test (BUMP TEST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Updating Calibration Settings (CAL SETTING) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Updating Bump Test Settings (BUMP SETTING). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Updating Alarm Parameters (ALARM SETTING) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Turning the Pump On/Off Display On or Off (PUMP OFF DISP) . . . . . . . . . . . . . . . . 147
Turning the User/Station ID Function On or Off (ID DISPLAY) . . . . . . . . . . . . . . . . . 148
Updating the Backlight Time Setting (BACK LIGHT TIME) . . . . . . . . . . . . . . . . . . . . 148
Updating the Language Setting (LANGUAGE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Updating the Lunch Break Setting (LUNCH BREAK) . . . . . . . . . . . . . . . . . . . . . . . . . 149
GX-6000 Operator’s Manual
Updating the Auto Zero Setting (AUTO ZERO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Updating the Demand Zero Setting (DEMAND ZERO) . . . . . . . . . . . . . . . . . . . . . . . . 149
Zero Follower Setting (ZERO FOLLOWER) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Zero Suppression Settings (ZERO SUPPRESS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Updating the Autoranging Setting (IR AUTO RANGE) . . . . . . . . . . . . . . . . . . . . . . . . 150
Updating the Confirmation Alert Setting (CONFIRMATION) . . . . . . . . . . . . . . . . . . . 150
Turning the Key Tone Noise On or Off (KEY TONE). . . . . . . . . . . . . . . . . . . . . . . . . . 151
Turning Inert Mode On or Off (INERT MODE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Updating the Leak Check/Bar Hole Mode Setting (L./B. MODE) . . . . . . . . . . . . . . . . 152
Setting the Bar Hole Measurement Time (BAR HOLE TIME) . . . . . . . . . . . . . . . . . . . 152
Updating the CO Display Setting (CO DISPLAY). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Updating the Man Down Settings (MAN DOWN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Updating the Datalogging Parameters (LOG SETTING). . . . . . . . . . . . . . . . . . . . . . . . 155
Adjusting the Low Flow Setpoint (FLOW ADJUST) . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Viewing the ROM/SUM of the Instrument (ROM/SUM) . . . . . . . . . . . . . . . . . . . . . . . 157
Turning the Password Function On or Off (PASSWORD). . . . . . . . . . . . . . . . . . . . . . . 157
Restoring the Default Settings (RESTORE DEFAULT) . . . . . . . . . . . . . . . . . . . . . . . . 158
Exiting Maintenance Mode (START MEASURE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Appendix B: Maintenance Mode 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Entering Maintenance Mode 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Tips for Using Maintenance Mode 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Changing the Gas Combination (GAS COMB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Changing the Catalytic LEL Channel’s Target Gas (HC SELECT). . . . . . . . . . . . . . . . 163
Changing the Streaming Setting (STREAMING MODE) . . . . . . . . . . . . . . . . . . . . . . . 164
Exiting Maintenance Mode 2 (ESCAPE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Appendix C: Using the GX-6000 in Leak Check Mode . . . . . . . . . . . . . . . . . 207
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Start Up, Leak Check Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Turning On the GX-6000, Leak Check Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Performing a Demand Zero, Leak Check Mode. . . . . . . . . . . . . . . . . . . . . . . . . 167
Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Setting the Display Range Value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Turning the Alarm On and Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Locating a Leak. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Overscale Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
Peak Hold Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
Snap Log Mode, Leak Check Mode Operation. . . . . . . . . . . . . . . . . . . . . . . . . . 170
Viewing Snap Log Data in Leak Check Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Turning Off the GX-6000, Leak Check Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Appendix D: Using the GX-6000 in Bar Hole Mode . . . . . . . . . . . . . . . . . . . . 175
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Start Up, Bar Hole Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Turning on the GX-6000, Bar Hole Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Performing a Fresh Air Adjustment, Bar Hole Mode. . . . . . . . . . . . . . . . . . . . . 177
GX-6000 Operator’s Manual
Bar Hole Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Performing a Bar Hole Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Turning Off the GX-6000, Bar Hole Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Appendix E: Using the GX-6000 in Inert Mode . . . . . . . . . . . . . . . . . . . . . . . 182
Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Start Up and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Appendix F: ESS-03 Toxic Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
Start Up and Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
ESS-03 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
Calibrating the ESS-03 Sensor Using Auto Calibration. . . . . . . . . . . . . . . . . . . 186
Calibrating the ESS-03 Sensor Using Single Calibration . . . . . . . . . . . . . . . . . 192
ESS-03 Bump Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Replacing the ESS-03 Sensor or Changing Sensor Type . . . . . . . . . . . . . . . . . . . . . . . . 192
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Appendix G: IR Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
IR HC Target Gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
IR CH4 Target Gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
IR Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
CO2 Scrubber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
IR HC Start Up and Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
0 - 100 %LEL/2.0 - 30.0 %vol Autoranging. . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
IR CH4 Start Up and Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
0 - 100 %LEL/5.0 - 100.0 %vol Autoranging. . . . . . . . . . . . . . . . . . . . . . . . . . . 201
IR CO2 Start Up and Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Performing a Demand Zero for Carbon Dioxide Sensors . . . . . . . . . . . . . . . . . 202
IR Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
IR Bump Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Replacing an IR Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Appendix H: 10.0 eV/Benzene PID Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Sensor Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Tube and Tube Holder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Tube. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tube Holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Measuring Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
GX-6000 Operator’s Manual
Benzene Select Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Viewing Benzene Select Mode Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Calibrating the 10.0 eV/Benzene PID Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Important Calibration Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Performing an AUTO CAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Performing a SINGLE CAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Performing a TUBE CAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Entering a CAL CODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
Replacing a Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
PID Sensor Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
Replacing a Tube. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Appendix I: 11.7 eV PID Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
11.7 eV PID Lamp Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Instrument. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Dehumidifier Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Measuring Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
Turning off a GX-6000 with an 11.7 eV Sensor . . . . . . . . . . . . . . . . . . . . . . . . . 235
Calibrating the 11.7 eV PID Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Setting the Fresh Air Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Performing an AUTO CAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Performing a SINGLE CAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Replacing the Dehumidifier Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Replacing a Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Replacing the PID Sensor’s Lamp and Electrode Stack. . . . . . . . . . . . . . . . . . . 237
Cleaning the 11.7 eV PID Sensor’s Lamp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
Parts List for 11.7 eV PID Instruments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Appendix J: Creating a PID User List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Installing the PID Gas List Editor Program. . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Connecting a GX-6000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Editing the User List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
GX-6000 Operator’s Manual
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.
GX-6000 Operator’s Manual
Chapter 1: Introduction
Overview
This chapter briefly describes the GX-6000 gas monitor. This chapter also describes the
GX-6000 Operator’s Manual (this document). Table 1 at the end of this chapter lists the
specifications for the GX-6000.
About the GX-6000
Using an advanced detection system consisting of up to six gas sensors, the GX-6000
sample draw gas monitor is capable of detecting the presence of combustible gas, oxygen
(O2), carbon monoxide (CO), hydrogen sulfide (H2S), and various other toxic gases
simultaneously. 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:
• Simultaneous monitoring of one to six gases.
• Choice of three operating modes:
• Normal Mode for typical confined space or area monitoring. Normal Mode is the
standard factory setting.
• Bar Hole Mode for checking of bar holes when searching for underground gas
leaks
• Leak Check Mode for locating leaks in valves and piping
• 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 (when used in Normal Mode)
• Alarm trend data (when used in Normal Mode)
• STEL and TWA (when used in Normal Mode) and over range alarms
• Peak readings (when used in Normal Mode)
• Built-in time function
• Lunch break feature
• RF shielded high impact plastic case
• CSA “C/US” classification for Class I, Division I, Groups A, B, C, and D hazardous
atmospheres
10 • Chapter 1: Introdu ction GX-6000 Operator’s Manual
WARNING: The Model GX-6000 detects oxygen deficiency, elevated levels of
oxygen, combustible gases, carbon monoxide, and hydrogen sulfide, all
of 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 t he un it an d to min imiz e th e risk
of personal injury. Be sure to maintain and periodically calibrate the
GX-6000 as described in this manual.
NOTE: ONLY THE COMBUSTIBLE GAS DETECTION PORTION OF THIS
INSTRUMENT HAS BEEN ASSESSED FOR PERFORMANCE.
GX-6000 Operator’s Manual Chapter 1: Introduction • 11
Specifications
Table 1: Standard Sensor Specifications/Alarm Points
Combustible
Gas, Methane
(CH
)
4
Calibration
Standard**
Detection
Range
Reading
Increment
Alarm 1
Factory Setting
Alarm 2
Factory Setting
STEL Alarm n/a n/a 5.0 ppm 200 ppm n/a 60.0 ppm
TWA Alarm n/a n/a 1.0 ppm 25 ppm n/a 40.0 ppm
* When calibrating the GX-6000 with the Auto Calibration or the Single Calibration method, the calibration gas value must be
equal to or higher than the alarm 1 setting. See “Updating the Alarm Point Settings (ALARM POINTS)” on page 145 for
instructions to change the alarm points if necessary for the desired calibration gas value.
** Although calibrated to a specific gas, these sensors will respond to a variety of gases.
0 - 100 %LEL 0 - 40
1 %LEL 0.1 volume% 0.5 ppm 1 ppm • 0 - 5000:
10 %LEL* 19.5
50 %LEL 23.5
Oxygen (O
volume%
volume%,
decreasing*
volume%,
increasing
) Hydrogen
2
Sulfide
(H
S)
2
0 - 100.0
ppm
5.0 ppm* 25 ppm* 5000 ppb* 400 ppm*
30.0 ppm 50 ppm 10000 ppb 1000 ppm
Carbon
Monoxide
(CO)
0 - 500
ppm
VOCs, Isobutylene Calibration
Standard**
Low Range PID High Range PID
0 - 50000 ppb 0 - 6000 ppm
1 ppb
• 5000 - 50000:
10 ppb
• 0 - 600 ppm:
0.1 ppm
• 600 - 6000 ppm: 1
ppm
Table 2: GX-6000 Specifications
Sampling
Method
Response
Time
Display Graphics LCD Display
Operating
Temperature
& Humidity
Sample Draw
T90 Within 30 Seconds
-20°C to 50
°
C/Below 95% RH (Without Condensation)
12 • Chapter 1: Introdu ction GX-6000 Operator’s Manual
Indication
Accuracy
Combustible Gas (LEL), Catalytic Type Sensor
• -10°C to 40
• -20°C to 50
°
C: 5% of full scale
°
C: 6% of full scale
Oxygen
•± 0.5% O
2
Hydrogen Sulfide
• ± 5% of reading or ± 2 ppm H
S (whichever is greater)
2
Carbon Monoxide
• ± 5% of reading or ± 5 ppm CO (whichever is greater)
PID
• ± 10% of reading or ± 1 increment (whichever is greater)
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, “C/US”, as Intrinsically Safe. Exia. Class I, Groups A, B, C, & D.
Temperature Code T3A.
C US
186718
Power Supply • Three AA size alkaline batteries
OR
• One lithium ion battery pack
Continuous
Operating
• Alkaline Batteries: 8 Hours (Non Alarm Operation, Fully Charged)
• Li-ion Battery Pack: 14 Hours (Non Alarm Operation, Fully Charged)
Hours
@ 25 °C
Case High-impact Plastic, RF Shielded, Dust and Weather Proof
Included
Accessories
• Belt clip
• 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, a 10.0 eV/
benzene PID sensor, an 11.7 eV PID sensor or any PID/IR CO
• Dehumidifier filter (included for instruments with an 11.7 eV PID sensor)
combination)
2
Other
Accessories
• Alkaline Battery Pack
• Rechargeable Li-ion Battery Pack
• 115 VAC Charger
• 12 VDC Charger
• Hose/Probes of Various Lengths, See “Chapter 7: General Parts List” on page 128.
• VOC Zero Filter (optional for instruments with a high range PID sensor)
• Dilution Fitting (1:1)
• DIN Rail Mounting Assembly (for mounting chargers to the wall)
®
• Product CD, includes Data Logger Management Program (Windows
7, 8, and 10)
• IrDA/USB Cable for connecting to a computer when using the Data Logger
Management Program (not needed if computer has an infrared port)
GX-6000 Operator’s Manual Chapter 1: Introduction • 13
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.)
About this Manual
Although the GX-6000 can support up to 6 sensors, this manual specifically describes an
instrument with the four standard sensors and a PID sensor. See the appendices for
descriptions of other sensors.
The GX-6000 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.
14 • Chapter 1: Introdu ction GX-6000 Operator’s Manual
Chapter 2: Description
Inlet Filter
Holder
Flow
Chamber
Battery
Pack
Flashlight LED
Alarm L EDs
RKI GX-6000
DISP
LOCK
(PANI C)
AIR
SHIFT
RESE T
Infrared
Communications
Port
Control Buttons
LC D
POWER/ENTER
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,
sensors, filters, inlet filter holder, and batteries.
GX-6000 Operator’s Manual Chapter 2: Description • 15
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.
LCD
A digital LCD (liquid crystal display) is visible through a clear plastic window in the top
case. The LCD simultaneously shows the gas reading for all installed sensors. 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.
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
SHIFT ▼ (PANIC) • enters instructions into the GX-6000’s microprocessor
POWER/ENTER • turns the GX-6000 on and off
RESET • silences and resets audible alarm if ALARM LATCHING is set to
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
• 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
• enters instructions, values, and settings into the GX-6000’s
microprocessor
LATCHING and ALARM SILENCE is set to ON
• turns the flashlight LED on and off
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.
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
16 • Chapter 2: Description GX-6000 Operator’s Manual
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 sensors. 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 faces
inside the GX-6000 and routes flow from the pump to the sensors and to the exhaust port
(on the top of the GX-6000 case).
Sensors
The GX-6000 uses five sensors to monitor combustible gas, oxygen (O2), carbon
monoxide (CO), hydrogen sulfide (H
sensors are located inside the GX-6000 and are held in their sockets by the flow chamber.
The sensors use different detection principles, as described below.
Combustible Gas Sensor
The % LEL sensor detects combustible gas in the % LEL range. It uses a catalytic element
for detection. 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-6000’s circuitry, converted to a measurement of combustible gas
concentration, and displayed on the LCD.
The standard calibration for the combustible gas sensor is to methane but the sensor will
still detect and respond to a variety of combustible gases.
Oxygen Sensor
The O
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-6000’s circuitry, converted to a measurement of gas
concentration, and displayed on the LCD.
sensor is a galvanic type of sensor. A membrane covers the cell and allows gas to
2
S), and isobutylene (IBL) simultaneously. The
2
GX-6000 Operator’s Manual Chapter 2: Description • 17
CO and H2S Sensors
The CO and H2S sensors are electrochemical cells that consist of two precious metal
electrodes in a dilute 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-6000’s circuitry, converted to a measurement of gas concentration, and displayed on
the LCD.
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. Regardless of the calibration gas, the PID channel
will still detect and respond to a variety of volatile organic compounds (VOCs). Consult
RKI Instruments, Inc. for other available PID configurations and to specify the desired
PID configuration when a unit is ordered.
Dummy Sensors
Any unit that has less than 6 sensors will have a dummy sensor installed in one or more
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.
Filters
An H2S removal filter disk is placed into a recess in the sensor gasket over the %LEL
sensor. 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 is not
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 H
containing 25 ppm H2S. If H2S exists in the monitoring environment, the H2S filter disk
will have to be replaced more frequently.
A charcoal filter is placed into a recess in the sensor gasket over the CO sensor. The
charcoal filter is black, has a woven texture, and is impregnated with an H2S absorbing
material. The CO sensor will respond if exposed to H2S and certain hydrocarbon gases.
The charcoal filter disk scrubs these gases out of the sample to avoid false CO readings. If
false or elevated CO readings are noticed, especially in the presence of H2S, change the
charcoal filter.
S filter disk after 40 2-minute calibrations with a cylinder
2
18 • Chapter 2: Description GX-6000 Operator’s Manual
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 8 hours and the lithium ion battery pack lasts at least 14
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 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 102.
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.
GX-6000 Operator’s Manual Chapter 2: Description • 19
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 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.
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 “Chapter 7:
General Parts List” on page 128). 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 110 for instructions to
replace the particle filter and hydrophobic filter disk.
Figure 2: Sample Hose and Probe
20 • Chapter 2: Description GX-6000 Operator’s Manual
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.
Other Accessories
Several other accessories are available for the GX-6000. This section describes the VOC
zero filter, the dilution fitting, and the DIN rail. Detailed instructions regarding the use of
the dilution fitting are included in other parts of this manual. Data logging accessories are
briefly described in “Data Logging” on page 67.
VOC Zero Filter
A VOC zero filter is included as standard with GX-6000s that include:
• Low range PID sensor (PID-001L)
• 10.0 eV/benzene PID sensor (PID-003L)
• 11.7 eV PID sensor (PID-004)
• Any PID sensor and any CO2 sensor
The VOC zero filter scrubs out low levels of VOC gases using charcoal. 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.
• Performing an air adjust on a PID/CO
scrubber).
GX-6000 Operator’s Manual Chapter 2: Description • 21
instrument (in combination with a CO2
2
The filter comes with a tubing stub and plug on each end. Both plugs must be removed
Filter
Plug
Tubing StubTubing Stub
Plug
To GX-6000
4" fo r 1 - Ch ar ge r Mo del
14" for 4- C har g e r M o de l
Use #10 Screws to Mount
1.38"
before using the filter and must be reinstalled for storage. The filter does not have a
preferred flow direction.
When used with a CO2 scrubber, the VOC zero filter gets connected to the instrument and
the CO2 scrubber gets connected to the VOC zero filter. See “Performing a Demand Zero
for Instruments with a Carbon Dioxide Sensor and a PID Sensor” on page 203 for more
instructions.
Figure 3: VOC Zero Filter
External Dilution Fitting
A 1:1 external dilution fitting is available for the GX-6000. It is designed to mate with the
inlet fitting and accept the sample hose and probe. The fitting is made with brass and
nickel plated brass and is appropriate for use with the four standard gases. The fitting is
normally used when it is necessary to introduce air into a sample that has no oxygen or a
very low level of oxygen, such as a nitrogen purged sample. It can also be used when one
of the target gas levels in the sample area will likely be present in a concentration above
the detection range for that gas. Since the fitting partially consists of unplated brass, it is
not appropriate for detection of elevated levels of H
such as Cl2 or SO2.
S or of gases that are easily absorbed
2
Figure 4: 1:1 Dilution Fitting
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 5: DIN Rail Dimensions
22 • Chapter 2: Description GX-6000 Operator’s Manual
1 . Use #10 screws to mount the DIN rail to the wall.
DIN Rail
Charger
Clamp
DIN Rail
2 . Install the charger(s) on the DIN rail. Seat the top of the DIN rail in the top slot on
the back of the charger. Press the bottom of the charger toward the DIN rail until it
locks into place.
Figure 6: Installing a Charger on the DIN Rail
3 . Slide the charger(s) along the DIN rail into the desired position.
4 . Install the end clamps on the left and right side of the charger or bank of chargers to
prevent sliding.
Figure 7: Clamp Installation
GX-6000 Operator’s Manual Chapter 2: Description • 23
Figure 8: 1-Charger Installation
Figure 9: 4-Charger Installation
5 . To remove any charger(s) from the DIN rail:
a. Remove the clamps by pushing on the bottom of the clamp and pulling on the top
of the clamp.
b. Slide the charger(s) off the DIN rail.
Figure 10: Charger Removal
24 • Chapter 2: Description GX-6000 Operator’s Manual
Chapter 3: Operation
Overview
This chapter explains how to use the GX-6000 to perform confined space entry
monitoring or general area monitoring in Normal Mode. There are three operational
modes in Normal Mode: Measuring Mode, Display Mode, and Calibration Mode. While
in Normal Mode, the unit is normally operating in Measuring Mode. Display Mode and
Calibration Mode are accessible from Measuring Mode. Display Mode is described in this
chapter. Calibration Mode is described in “Chapter 4: Calibration Mode” on page 69.
The GX-6000 can also operate in Leak Check Mode and Bar Hole Mode. See “Appendix
H: 10.0 eV/Benzene PID Sensor” for operating instructions for Leak Check Mode. See
“Appendix D: Using the GX-6000 in Bar Hole Mode” on page 175 for operating
instructions for Bar Hole Mode.
Start Up
This section explains how to start up the GX-6000, get it ready for operation, and turn it
off.
NOTE: The screens illustrated in this section are for a standard 4-gas + high range PID
unit. The screens displayed by your GX-6000 may be slightly different.
Turning On the GX-6000
To illustrate certain functions, the following description of the GX-6000 start up sequence
assumes that the following menu items in Maintenance Mode are turned on: LUNCH
BREAK, CAL REMINDER, BUMP REMINDER, and ID DISPLAY. If any of these
items are turned off, then the corresponding screens will not appear.
The GX-6000 may be used with a sample hose and probe or with the tapered rubber
nozzle. Determine which configuration works best for your application.
NOTE: When the sample hose is not being used, its outgassing characteristics may
result in a small buildup of gas to which the PID sensor will respond. If a
sample hose has been sitting unused for a period of time, when that sample hose
is connected to a GX-6000, the PID channel may temporarily show a reading.
The reading will return to a fresh air reading after all of the built up gas has
been drawn out of the sample hose.
1 . Connect the tapered rubber nozzle or the sample hose and probe to the GX-6000’s
quick connect inlet fitting.
2 . Press and briefly hold down the POWER/ENTER button. Release the button when
you hear a beep.
GX-6000 Operator’s Manual Chapter 3: Operation • 25
3 . If LUNCH BREAK is turned on (see “Updating the Lunch Break Setting (LUNCH
4:07
LUNCH BREAK
5 SEC
YES:ENTER
NO:DISP
4:07
CAL DATE PAST
CONFIRM TO USE
CAL MODE : ENTER
NO : RESET
BREAK)” on page 149), the Lunch Break Screen appears. The unit counts down
from 5 seconds at the top of the screen.
• To continue accumulating peak and time-weighted average (TWA) readings from
the last time the GX-6000 was used, press and release the POWER/ENTER
button before the countdown reaches 0 or allow the countdown to reach 0. If you
do not press the POWER/ENTER button within the 5 second countdown, the
GX-6000 automatically resumes accumulating the peak and TWA readings. The
GX-6000 will also continue to keep track of operating time including the
operating time from the last time the GX-6000 was used. See “Time in Operation
Screen” on page 54 for more information about how the GX-6000 tracks the
operating time. The short-term exposure limit (STEL) reading is reset each time
the GX-6000 is turned on.
• To reset the accumulation of these measurements, press and release the DISP/
LOCK button before the countdown reaches 0.
4 . If CAL REMINDER is set to ON, the screen that appears next depends on how
CAL EXPRD is set in Maintenance Mode (see “Updating the Calibration Expired
Setting (CAL EXPRD)” on page 140).
• If the unit is due for calibration and CAL EXPRD is set to CONFIRM TO
USE, then the following screen displays and the buzzer sounds in a double
pulsing pattern.
To perform a calibration, press and release the POWER/ENTER button. The
GX-6000 will enter Calibration Mode and the LCD will show the Calibration
Mode main menu. See “Chapter 4: Calibration Mode” on page 69 for
26 • Chapter 3: Operation GX-6000 Operator’s Manual
instructions to calibrate the GX-6000. When you are done with the calibration
4:07
CAL DATE PAST
CANNOT USE
CAL MODE : ENTER
and exit Calibration Mode, the unit will begin the startup sequence. If the
calibration was successful, the screen above will not appear again until the unit is
due for calibration. If the calibration was not successful, the screen above will
again appear in the startup sequence.
To continue without performing a calibration, press and release the RESET
button.
• If the unit is due for calibration and CAL EXPRD is set to CANNOT USE, then
the following screen displays and the buzzer sounds in a double pulsing pattern.
The GX-6000 cannot be used until a successful calibration has been performed.
Press and release the POWER/ENTER button to enter Calibration Mode. See
“Chapter 4: Calibration Mode” on page 69 for instructions to calibrate the GX-
6000.
NOTE: In this situation, even if the User password function has been turned on, no
password is required to perform a calibration.
When you are done with the calibration and exit Calibration Mode, the unit will
begin the startup sequence. If the calibration was successful, the screen above
will not appear again until the unit is due for calibration. If the calibration was
not successful, the screen above will again appear in the startup sequence.
GX-6000 Operator’s Manual Chapter 3: Operation • 27
• If the unit is due for calibration and CAL EXPRD is set to NO EFFECT, then
4:07
CAL DATE PAST
NO EFFECT
CAL MODE : ENTER
4:07
BUMP DATE PAST
CONFIRM TO USE
CAL MODE : ENTER
NO : RESET
the following alert screen displays and the buzzer sounds in a double pulsing
pattern.
If you want to enter Calibration Mode, press and release the POWER/ENTER
button. If you do not want to enter Calibration Mode, wait for the instrument to
continue with its startup sequence.
5 . If BUMP REMINDER is set to ON (factory setting is OFF), the screen that appears
next depends on how BUMP EXPRD is set in Maintenance Mode (see “Updating
the Bump Expired Setting (BUMP EXPRD)” on page 144).
• If the unit is due for bump testing and BUMP EXPRD is set to CONFIRM TO
USE, then the following screen displays and the buzzer sounds in a double
pulsing pattern.
To perform a bump test, press and release the POWER/ENTER button. The GX6000 will enter Calibration Mode and the LCD will show the Calibration Mode
main menu. See “Chapter 4: Calibration Mode” on page 69 for instructions to
bump test the GX-6000. When you are done with the bump test and exit
Calibration Mode, the unit will begin the startup sequence. If the bump test was
successful, the screen above will not appear again until the unit is due for bump
testing. If the bump test was not successful, the screen above will again appear in
the startup sequence.
To continue without performing a bump test, press and release the RESET
button.
28 • Chapter 3: Operation GX-6000 Operator’s Manual
NOTE: If BUMP DISP is set to OFF, the bump test menu item will not appear in
4:07
BUMP DATE PAST
CANNOT USE
CAL MODE : ENTER
Calibration Mode even though the instrument is prompting you to perform a
bump test. A bump test can always be performed in Maintenance Mode, if
necessary.
• If the unit is due for bump testing and BUMP EXPRD is set to CANNOT USE,
then the following screen displays and the buzzer sounds in a double pulsing
pattern.
The GX-6000 cannot be used until a successful bump test has been performed.
Press and release the POWER/ENTER button to enter Calibration Mode. See
“Chapter 4: Calibration Mode” on page 69 for instructions to bump test the GX-
6000.
NOTE: In this situation, even if the User password function has been turned on, no
password is required to perform a bump test.
NOTE: If BUMP DISP is set to OFF, the bump test menu item will not appear in
Calibration Mode even though the instrument is prompting you to perform a
bump test. A bump test can always be performed in Maintenance Mode, if
necessary.
When you are done with the bump test and exit Calibration Mode, the unit will
begin the startup sequence. If the bump test was successful, the screen above will
not appear again until the unit is due for bump testing. If the bump test was not
successful, the screen above will again appear in the startup sequence.
GX-6000 Operator’s Manual Chapter 3: Operation • 29
• If the unit is due for bump testing and BUMP EXPRD is set to NO EFFECT,
4:07
BUMP DATE PAST
NO EFFECT
CAL MODE : ENTER
4:07
DATE
4/ 1/15
DD/MM/YYYY
4:07
then the following alert screen displays and the buzzer sounds in a double pulsing
pattern.
If you want to enter Calibration Mode, press and release the POWER/ENTER
button. If you do not want to enter Calibration Mode, wait for the instrument to
continue with its startup sequence.
NOTE: If CAL REMINDER or BUMP REMINDER or both are set to OFF, a
WARM-UP screen will display before the warm up sequence continues.
6 . The Date/Time Screen appears for a few seconds.
30 • Chapter 3: Operation GX-6000 Operator’s Manual
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