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 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

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 H2S Scrubber Disk and the Charcoal Filter . . . . . . . . . . . . . . . . . . . . . . 111

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

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: Introduction

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 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.

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	Oxygen (O2)	Hydrogen	Carbon	VOCs, Isobutylene Calibration
	Gas, Methane		Sulfide	Monoxide	Standard**
	(CH4)		(H2S)	(CO)
					Low Range PID		High Range PID
	Calibration
	Standard**
Detection	0 - 100 %LEL	0 - 40	0 - 100.0	0 - 500	0 - 50000 ppb		0 - 6000 ppm
Range		volume%	ppm	ppm
Reading	1 %LEL	0.1 volume%	0.5 ppm	1 ppm	•	0 - 5000:	•	0 - 600 ppm:
Increment						1 ppb		0.1 ppm
					•	5000 - 50000:	•	600 - 6000 ppm: 1
						10 ppb		ppm
Alarm 1	10 %LEL*	19.5	5.0 ppm*	25 ppm*	5000 ppb*		400 ppm*
Factory Setting		volume%,
		decreasing*
Alarm 2	50 %LEL	23.5	30.0 ppm	50 ppm	10000 ppb		1000 ppm
Factory Setting		volume%,
		increasing
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.

	Table 2: GX-6000 Specifications
Sampling	Sample Draw
Method
Response	T90 Within 30 Seconds
Time
Display	Graphics LCD Display
Operating	-20°C to 50°C/Below 95% RH (Without Condensation)
Temperature
& Humidity

12 • Chapter 1: Introduction

GX-6000 Operator’s Manual

Indication	Combustible Gas (LEL), Catalytic Type Sensor
Accuracy	•	-10°C to 40°C: 5% of full scale
	• -20°C to 50°C: 6% of full scale
	Oxygen
	•	± 0.5% O2
	Hydrogen Sulfide
	• ± 5% of reading or ± 2 ppm H2S (whichever is greater)
	Carbon Monoxide
	• ± 5% of reading or ± 5 ppm CO (whichever is greater)
	PID
	• ± 10% of reading or ± 1 increment (whichever is greater)
Safety/	•	ATEX: II 1 G Ex ia IIC T4 Ga
Regulatory		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	•	Alkaline Batteries: 8 Hours (Non Alarm Operation, Fully Charged)
Operating	•	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	•	Belt clip
Accessories	•	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 CO2 combination)
	• Dehumidifier filter (included for instruments with an 11.7 eV PID sensor)
Other	•	Alkaline Battery Pack
Accessories	•	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	Approximately 200(H) x 68(W) x 52(D) mm (7.9”H x 2.7”W x 2.0”D)
and Weight	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: Introduction

GX-6000 Operator’s Manual

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, sensors, filters, inlet filter holder, and batteries.

Flashlight LED	Inlet Filter
	Holder

Alarm LEDs

RKI GX-6000

LCD

DISP	RESE T
	A IR

Control Buttons	LO CK
	S HIFT
	(PANIC)
	P OW ER / E N TER
Infrared
Communications
Port

Flow

Chamber

Battery

Pack

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.

GX-6000 Operator’s Manual

Chapter 2: Description • 15

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
		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

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

Avibrating 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 (H2S), and isobutylene (IBL) simultaneously. The

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 O2 sensor is a galvanic type of sensor. A membrane covers the cell and allows gas to

diffuse into the cell at a rate proportional to the partial pressure of oxygen. The oxygen reacts in the cell and produces a voltage proportional to the concentration of oxygen. The voltage is measured by the GX-6000’s circuitry, converted to a measurement of gas concentration, and displayed on the LCD.

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 H2S filter disk after 40 2-minute calibrations with a cylinder containing 25 ppm H2S. If H2S exists in the monitoring environment, the H2S filter disk will have to be replaced more frequently.

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.

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

A3 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 GX6000 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/CO2 instrument (in combination with a CO2 scrubber).

GX-6000 Operator’s Manual

Chapter 2: Description • 21

The filter comes with a tubing stub and plug on each end. Both plugs must be removed 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.

	Filter
Tubing Stub	Tubing Stub
Plug	Plug

To GX-6000

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 H2S or of gases that are easily absorbed

such as Cl2 or SO2.

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.

Use #10 Screws to Mount

1.38"

4" for 1-Charger Model 14" for 4-Charger Model

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.

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.

Charger

DIN Rail

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.

DIN Rail

Clamp

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 BREAK)” on page 149), the Lunch Break Screen appears. The unit counts down from 5 seconds at the top of the screen.

4:07 LUNCH BREAK

5 SEC

YES:ENTER

NO:DISP

•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.

4:07

CAL DATE PAST

CONFIRM TO USE

CAL MODE : ENTER

NO : RESET

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 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 CALEXPRD is set to CANNOT USE, then the following screen displays and the buzzer sounds in a double pulsing pattern.

4:07

CAL DATE PAST

CANNOT USE

CAL MODE : ENTER

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 GX6000.

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 the following alert screen displays and the buzzer sounds in a double pulsing pattern.

4:07

CAL DATE PAST

NO EFFECT

CAL MODE : ENTER

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 BUMPREMINDER 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.

4:07

BUMP DATE PAST

CONFIRM TO USE

CAL MODE : ENTER

NO : RESET

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 DISPis 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.

•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.

4:07

BUMP DATE PAST

CANNOT USE

CAL MODE : ENTER

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 GX6000.

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 DISPis 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, then the following alert screen displays and the buzzer sounds in a double pulsing pattern.

4:07

BUMP DATE PAST

NO EFFECT

CAL MODE : ENTER

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.

4:07 DATE

4/ 1/15 DD/MM/YYYY

4:07

30 • Chapter 3: Operation

GX-6000 Operator’s Manual