RKI Instruments 72-6ABX-C-50, 72-6ABX-C-51, 72-6XBX-C, 72-6AXX-C, 72-6ABX-C User manual

GX-6000

Operator’s Manual

Part Number: 71-0362

Revision: R

Released: 9/30/21

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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

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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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Turning Off the GX-6000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

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Measuring Mode, Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Monitoring an Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Using Optional Sample Hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Combustible Gas Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

VOC Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Oxygen Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Snap Log Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Measuring Mode, Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Alarm Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Responding to Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Data Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Chapter 4: Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

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

Chapter 5: Calibration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Calibration Supplies and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Entering Calibration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Calibrating Using the Auto Calibration Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Setting the Fresh Air Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Performing a Span Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Returning to Measuring Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Calibrating Using the Single Calibration Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Setting the Fresh Air Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Performing a Span Adjustment in Single Calibration . . . . . . . . . . . . . . . . . . . . . 85

Performing a Bump Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

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Chapter 6: User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Tips for Using User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Entering User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Setting the Date and Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Setting the Date Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Configuring the Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Updating the Language Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Viewing the ROM/SUM of the Instrument. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Turning the Password Function On or Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Exiting User Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Chapter 7: Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Replacing or Recharging the Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Replacing the Alkaline Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Replacing the Lithium Ion Battery Pack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Recharging the Lithium Ion Battery Pack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Recharging the Lithium Ion Battery Pack Out of the Instrument . . . . . . . . . . . . 109

Replacing the Probe’s Particle Filter and Hydrophobic Filter Disk . . . . . . . . . . . . . . . 112

Replacing the H2S Scrubber Disk and the Charcoal Filter . . . . . . . . . . . . . . . . . . . . . . 113

Replacing a Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Replacing the Hydrophobic Filter and Wire Mesh Disk. . . . . . . . . . . . . . . . . . . . . . . . . 118

PID Sensor Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Cleaning the PID Sensor’s Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Replacing the PID Sensor’s Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Replacing the PID Sensor’s Electrode Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Chapter 8: General Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Appendix A: Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Entering Maintenance Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Using Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Setting the Date and Time (DATE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Setting the Date Format (DATE FORMAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Performing a Calibration (GAS CALIBRATION) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Performing a Bump Test (BUMP TEST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Updating Calibration Settings (CAL SETTING) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Updating Bump Test Settings (BUMP SETTING). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Updating Alarm Parameters (ALARM SETTING) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Turning the Pump On/Off Display On or Off (PUMP OFF DISP) . . . . . . . . . . . . . . . . 150

Turning the User/Station ID Function On or Off (ID DISPLAY) . . . . . . . . . . . . . . . . . 151

Updating the Backlight Time Setting (BACK LIGHT TIME) . . . . . . . . . . . . . . . . . . . . 151

Updating the Language Setting (LANGUAGE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

Updating the Lunch Break Setting (LUNCH BREAK) . . . . . . . . . . . . . . . . . . . . . . . . . 152

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Updating the Auto Zero Setting (AUTO ZERO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Updating the Demand Zero Setting (DEMAND ZERO) . . . . . . . . . . . . . . . . . . . . . . . . 152

Zero Follower Setting (ZERO FOLLOWER) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Zero Suppression Settings (ZERO SUPPRESS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Updating the Autoranging Setting (IR AUTO RANGE) . . . . . . . . . . . . . . . . . . . . . . . . 153

Updating the Confirmation Alert Setting (CONFIRMATION) . . . . . . . . . . . . . . . . . . . 154

Turning the Key Tone Noise On or Off (KEY TONE) . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Turning Inert Mode On or Off (INERT MODE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Updating the Leak Check/Bar Hole Mode Setting (L./B. MODE) . . . . . . . . . . . . . . . . 155

Setting the Bar Hole Measurement Time (BAR HOLE TIME) . . . . . . . . . . . . . . . . . . . 155

Updating the CO Display Setting (CO DISPLAY). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Updating the Man Down Settings (MAN DOWN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Updating the Datalogging Parameters (LOG SETTING). . . . . . . . . . . . . . . . . . . . . . . . 158

Turning Sensor Life Warning On or Off (SEN LIFE ALERT). . . . . . . . . . . . . . . . . . . . 159

Adjusting the Low Flow Setpoint (FLOW ADJUST) . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Viewing the ROM/SUM of the Instrument (ROM/SUM) . . . . . . . . . . . . . . . . . . . . . . . 161

Turning the Password Function On or Off (PASSWORD). . . . . . . . . . . . . . . . . . . . . . . 161

Restoring the Default Settings (RESTORE DEFAULT) . . . . . . . . . . . . . . . . . . . . . . . . 162

Exiting Maintenance Mode (START MEASURE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

Appendix B: Maintenance Mode 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

Entering Maintenance Mode 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

Tips for Using Maintenance Mode 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

Changing the Gas Combination (GAS COMB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

Changing the Catalytic LEL Channel’s Target Gas (HC SELECT). . . . . . . . . . . . . . . . 167

Changing the Streaming Setting (STREAMING MODE) . . . . . . . . . . . . . . . . . . . . . . . 168

Exiting Maintenance Mode 2 (ESCAPE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Appendix C: Using the GX-6000 in Leak Check Mode . . . . . . . . . . . . . . . . . 212

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

Start Up, Leak Check Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

Turning On the GX-6000, Leak Check Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

Performing a Demand Zero, Leak Check Mode . . . . . . . . . . . . . . . . . . . . . . . . . 171

Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Setting the Display Range Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Turning the Alarm On and Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Locating a Leak. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Overscale Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

Peak Hold Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

Snap Log Mode, Leak Check Mode Operation. . . . . . . . . . . . . . . . . . . . . . . . . . 174

Viewing Snap Log Data in Leak Check Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 176

Turning Off the GX-6000, Leak Check Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

Appendix D: Using the GX-6000 in Bar Hole Mode . . . . . . . . . . . . . . . . . . . . 179

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Start Up, Bar Hole Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Turning on the GX-6000, Bar Hole Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

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Performing a Fresh Air Adjustment, Bar Hole Mode. . . . . . . . . . . . . . . . . . . . . 182

Bar Hole Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

Performing a Bar Hole Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

Turning Off the GX-6000, Bar Hole Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Appendix E: Using the GX-6000 in Inert Mode . . . . . . . . . . . . . . . . . . . . . . . 186

Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

Start Up and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Appendix F: ESS-03 Toxic Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

Start Up and Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

ESS-03 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

Calibrating the ESS-03 Sensor Using Auto Calibration. . . . . . . . . . . . . . . . . . . 190

Calibrating the ESS-03 Sensor Using Single Calibration . . . . . . . . . . . . . . . . . 197

ESS-03 Bump Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

Replacing the ESS-03 Sensor or Changing Sensor Type . . . . . . . . . . . . . . . . . . . . . . . . 197

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

Appendix G: IR Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203

IR HC Target Gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203

IR CH4 Target Gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204

IR Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204

CO2 Scrubber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

IR HC Start Up and Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

0 - 100 %LEL/2.0 - 30.0 %vol Autoranging . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

IR CH4 Start Up and Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

0 - 100 %LEL/5.0 - 100.0 %vol Autoranging . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

IR CO2 Start Up and Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207

Performing a Demand Zero for Carbon Dioxide Sensors . . . . . . . . . . . . . . . . . 207

IR Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

IR Bump Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

Replacing an IR Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210

Appendix H: 10.0 eV/Benzene PID Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

Sensor Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213

Tube and Tube Holder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213

Tube. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tube Holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213

Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214

Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215

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Measuring Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216

Benzene Select Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216

Viewing Benzene Select Mode Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222

Calibrating the 10.0 eV/Benzene PID Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224

Important Calibration Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224

Performing an AUTO CAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225

Performing a SINGLE CAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225

Performing a TUBE CAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226

Entering a CAL CODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234

Replacing a Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234

PID Sensor Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234

Replacing a Tube. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

Appendix I: 11.7 eV PID Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238

11.7 eV PID Lamp Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

Dehumidifier Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240

Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240

Measuring Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241

Turning off a GX-6000 with an 11.7 eV Sensor . . . . . . . . . . . . . . . . . . . . . . . . . 241

Calibrating the 11.7 eV PID Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242

Setting the Fresh Air Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242

Performing an AUTO CAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242

Performing a SINGLE CAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

Replacing the Dehumidifier Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

Replacing a Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

Replacing the PID Sensor’s Lamp and Electrode Stack. . . . . . . . . . . . . . . . . . . 243

Cleaning the 11.7 eV PID Sensor’s Lamp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

Parts List for 11.7 eV PID Instruments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244

Appendix J: Creating a PID User List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Installing the PID Gas List Editor Program. . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Connecting a GX-6000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Editing the User List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246

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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.

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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

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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.

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Specifications

Table 1: Standard Sensor Specifications/Alarm Points

Combustible

Gas, Methane

)

(CH

4

Calibration

Oxygen (O

)Hydrogen

2

Sulfide

(H

S)

2

Carbon

Monoxide

(CO)

VOCs, Isobutylene Calibration

Standard**

Low Range PID High Range PID

Standard**

Detection
Range

Reading
Increment

Alarm 1
Factory
Setting

Alarm 2
Factory
Setting

0 - 100 %LEL 0 - 40

volume%

0 - 100.0
ppm

0 - 500
ppm

0 - 50000 ppb 0 - 6000 ppm

1 %LEL 0.1 volume% 0.5 ppm 1 ppm • 0 - 5000:

1 ppb

• 5000 - 50000:
10 ppb

10 %LEL* 19.5

5.0 ppm* 25 ppm* 5000 ppb* 400 ppm*
volume%,
decreasing*

50 %LEL 23.5

30.0 ppm 50 ppm 10000 ppb 1000 ppm
volume%,
increasing

• 0 - 600 ppm:

0.1 ppm

• 600 - 6000
ppm: 1 ppm

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 148 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

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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

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Other
Accessories

• Alkaline Battery Pack

• Rechargeable Li-ion Battery Pack

• 115 VAC Charger

• 12 VDC Charger

• Hose/Probes of Various Lengths, See “Chapter 8: General Parts List” on page 129.

• 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

• IrDA/USB Cable for connecting to a computer when using the Data Logger
Management Program (not needed if computer has an infrared port)

®

7, 8, and 10)

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.

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Chapter 2: Description

Inlet Filter

Holder

Flow

Chamber

Battery

Pack

Flashlight LED

Alarm LEDs

RKI GX-6000

DISP

LOCK

(PAN IC )

AIR

SHIFT

RESET

Infrared

Comm unications

Port

Control Buttons

LCD

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.

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.

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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.

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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 PAN I C 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.

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Buzzer

One solid-state electronic buzzer is located inside the case. Holes on the top front of the
case allow the sound to exit the case. The buzzer sounds for gas alarms, malfunctions, low
battery voltage, and as an indicator during use of the GX-6000’s many display and
adjustment options.

Vibrator

A vibrating motor inside the GX-6000 case vibrates for gas alarms, unit malfunctions, and
as an indicator during normal use of the various modes of the GX-6000.

Printed Circuit Boards (PCBs)

The GX-6000 printed circuit boards analyze, record, control, store, and display the
information collected. The circuit boards are located inside the case. They are not user
serviceable.

Pump

A diaphragm pump inside the GX-6000 draws the sample to the 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.

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CO and H2S Sensors

The CO and H

S sensors are electrochemical cells that consist of two precious metal

2

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 H
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 H
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 in the ambient air from reaching the unit’s combustible gas sensor.

2

S. If H2S exists in the monitoring environment, the H2S filter disk

2

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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 pg.104.

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.

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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 pg.129). 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 112 for instructions to
replace the particle filter and hydrophobic filter disk.

Figure 2: Sample Hose and Probe

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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 45.

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).

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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" for 1-Charger Model

14" for 4-Charge r Mode l

Use#10Screws 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 208 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 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.

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Figure 5: DIN Rail Dimensions

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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

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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

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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.

The GX-6000 can also operate in Leak Check Mode and Bar Hole Mode. See pg.169 for
Leak Check Mode instructions. See pg.179 for Bar Hole Mode instructions.

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.

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3 . If LUNCH BREAK is turned on (see “Updating the Lunch Break Setting (LUNCH

4:07

LUNCH BREAK

5 SEC

YES:ENTER

NO:DISP

BREAK)” on page 152), 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.

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4 . If CAL REMINDER is set to ON (factory setting) and a calibration is due, the

4:07

CAL DATE PAST

CONFIRM TO USE

CAL MODE : ENTER

NO : RESET

4:07

CAL DATE PAST

CANNOT USE

CAL MODE : ENTER

4:07

CAL DATE PAST

NO EFFECT

CAL MODE : ENTER

screen that appears next depends on how CAL EXPRD is set in Maintenance
Mode (see pg.141). The three possible screens are described below. If a
calibration is not due, the instrument shows how many days are left until a
calibration is due.

CAL EXPRD set to CONFIRM

TO USE (factory setting)

LCD

Sound Buzzer sounds double pulsing tone Buzzer sounds double pulsing

Action • Option A, Perform calibration

Press and release POWER/

ENTER to perform a calibra-

tion. The GX-6000 takes you
straight to the 4-gas Gas Select
Screen in Calibration Mode’s
AUTO CAL\GAS SELECT
menu. See pg.68 for calibration
instructions.
If the calibration is successful,
the screen above will not appear
again until the unit is due for
calibration. If the calibration is
not successful, the screen above
will again appear in the startup
sequence.

• Option B, Bypass message
continue without performing a
calibration, press and release
RESET.

:

: To

CAL EXPRD set to

CANNOT USE

tone

The GX-6000 cannot be used until

a successful calibration is per-

formed. Press and release

POWER/ENTER to perform a cal-

ibration. The instrument takes you
straight to the 4-gas Gas Select
Screen in Calibration Mode’s
AUTO CAL\GAS SELECT menu.

Even if the User password func­tion has been turned on, no pass-

word is required to perform a
calibration.

If you don’t press POWER/

ENTER, the instrument automati-

cally goes to the 4-gas Gas Select
Screen after 6 seconds. See pg.68
for calibration instructions.

If the calibration is successful, the
screen above will not appear again
until the unit is due for calibration.
If the calibration is not successful,
the screen above will again appear
in the startup sequence.

CAL EXPRD set to

NO EFFECT

None

• Option A, Perform calibration
To perform a calibration, press
and release POWER/ENTER.
The instrument takes you
straight to the 4-gas Gas Select
Screen in Calibration Mode’s
AUTO CAL\GAS SELECT
menu.

• Option B, Bypass message
continue without performing a
calibration, wait a few seconds
for the instrument to continue
with its startup sequence.

: To

:

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5 . If BUMP REMINDER is set to ON (factory setting is OFF) and a bump test is

4:07

BUMP DATE PAST

CONFIRM TO USE

CAL MODE : ENTER

NO : RESET

4:07

BUMP DATE PAST

CANNOT USE

CAL MODE : ENTER

4:07

BUMP DATE PAST

NO EFFECT

CAL MODE : ENTER

due, the screen that appears next depends on how BUMP EXPRD is set in
Maintenance Mode (see pg.146). The three possible screens are described below.
If a bump test is not due, the instrument shows how many days are left until a
bump test is due.

BUMP EXPRD set to CON-

FIRM TO USE (factory setting)

LCD

Sound Buzzer sounds double pulsing

tone

Action • Option A, Perform bump test

Press and release POWER/
ENTER to perform a bump
test. The instrument takes you
straight to the 4-gas Gas Select
Screen in Calibration Mode’s
BUMP TEST menu. See pg.89
for bump test instructions.

If the bump test is successful,
the screen above will not
appear again until the unit is
due for bump testing. If the
bump test is not successful, the
screen above will again appear
in the startup sequence.

• Option B, Bypass message
continue without performing a
bump test, press and release
RESET.

: To

BUMP EXPRD set to

CANNOT USE

Buzzer sounds double pulsing tone None

The GX-6000 cannot be used until

:

a successful bump test has been
performed. Press and release
POWER/ENTER to perform a
bump test. The instrument takes
you straight to the 4-gas Gas Select
Screen in Calibration Mode’s
BUMP TEST menu. If you don’t

press POWER/ENTER, the instru-

ment automatically goes to the 4-

gas Gas Select Screen after 6 sec-

onds. See pg.89 for bump test
instructions.

If the bump test is successful, the
screen above will not appear again

until the unit is due for bump test­ing. If the bump test is not success-

ful, the screen above will again
appear in the startup sequence.

BUMP EXPRD set to

NO EFFECT

• Option A, Perform bump test
To perform a bump test, press
and release POWER/ENTER.
The instrument takes you
straight to the 4-gas Gas Select
Screen in Calibration
Mode’s BUMP menu.

• Option B, Bypass message
continue without performing a
bump test, wait a few seconds
for the instrument to continue
with its startup sequence.

: To

:

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6 . The Date/Time Screen appears for a few seconds.

4:07

DATE

4/ 1/15

DD/MM/YYYY

4:07

4:07

BATTERY

VOLTAGE

4.5V

BATTERY TYPE

ALKALINE

LATCHING

GAS

%LEL %

ppm ppm

P

ppm

CH4 O2

H2S CO

VOC

GAS

SMART 1

Isobutylene

10.6 eV

7 . The Battery Voltage Screen appears for a few seconds.

8 . The Active Gases Screen appears for a few seconds indicating which channels are

active and their target gas.

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9 . The full scale values and the gas alarm setpoints are displayed by five screens in

F.S.

CH4 O2

%LEL %

H2S CO

ppm ppm

VOC P

ppm

100 40.0

100.0 500

6000

AL1

CH4 O2

%LEL %

H2S CO

ppm ppm

VOC P

ppm

10 19.5

5.0 25

400.0

AL2

CH4 O2

%LEL %

H2S CO

ppm ppm

VOC P

ppm

50 23.5

30.0 50

1000

STEL

H2S CO

ppm ppm

VOC P

ppm

1.0 25

60.0

TWA

H2S CO

ppm ppm

VOC P

ppm

5.0 200

40.0

4:07

USER ID

KIMBERLY

4:07

STATION ID

TANK 5

sequence: the Full Scale Screen, the Low Alarm Screen, High Alarm Screen, STEL
Alarm Screen, and TWA Alarm Screen. Each screen remains on the LCD for three
seconds.

10 . If ID DISPLAY is set to ON (see “Turning the User/Station ID Function On or Off

(ID DISPLAY)” on page 151), the User ID Screen appears for a few seconds,
followed by the Station ID Screen.

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If ID DISPLAY is set to OFF, these screens will not appear.

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11 . If the GX-6000 experiences a sensor failure during start up, a screen indicating

SENSOR

CH4

%LEL

FAIL

4:07

CH4 O2

%LEL %

H2S CO

ppm ppm

VOC

ppm

0 20.9

0.0 0

0

which sensor failed appears and the buzzer sounds a double pulsing tone once per
second. In the example below, the CH4 sensor has failed.

If you wish to continue, press and release the RESET button to acknowledge the
failure. The gas reading for the failed sensor will be replaced by “- - - -”. Replace the
failed sensor as soon as possible.

12 . The GX-6000 is now monitoring for gas in Measuring Mode. The Measuring Mode

Screen appears displaying the current gas reading for each target gas.
If you have 2 PID sensors installed, they might both be displayed as “VOC”. The
channel that appears first is based on the following sensor priority.

High Priority

Low Priority

10.6 eV low range PID

10.0 eV/benzene PID

11.7 eV PID

10.6 eV high range PID

GX-6000 Operator’s Manual Chapter 3: Operation • 31

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Performing a Demand Zero

Before using the GX-6000, it is recommended to set the fresh air readings for the target
gases by performing a demand zero. This will set the CH4, H2S, CO, and PID channels to

zero and the OXY channel to 20.9%.

1 . Find a fresh-air environment. This is an environment free of toxic or combustible

gases and of normal oxygen content (20.9%).

2 . Turn on the unit as described above in “Turning On the GX-6000”.

3 . If you suspect any low-level VOC background in the area, you will need to use the

VOC zero filter.

NOTE: If you have both a PID and a CO2 sensor installed, you will need to follow the

directions on pg.208 instead of following the directions shown below.

a. Remove the plug from each end of the VOC zero filter.

b. Attach the VOC zero filter to the inlet fitting or probe. The filter does not have a

preferred flow direction.

c. Let the instrument draw through the VOC zero filter for 1 minute before

continuing.

4 . Press and hold the ▲AIR button. The LCD prompts you to continue holding the

▲AIR button and the buzzer will pulse while you hold the button.

5 . Continue to hold the ▲AIR button until the LCD prompts you to release it. The GX-

6000 will set the fresh air reading for all channels. Start up is complete and the unit is
now ready for monitoring.

6 . If the VOC zero filter was used, remove the filter from the GX-6000’s inlet fitting or

probe. Reinstall the plugs on each end of the filter.

Turning Off the GX-6000

1 . Press and hold the POWER/ENTER button.

2 . TURN OFF will appear on the display and the buzzer will pulse for about five

seconds.

3 . Release the button when TURN OFF disappears from the display.

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Measuring Mode, Normal Operation

4:07

CH4 O2

%LEL %

H2S CO

ppm ppm

VOC

ppm

0 20.9

0.0 0

0

When the GX-6000 completes its startup sequence, it is in Measuring Mode. In Measuring
Mode the GX-6000 continuously monitors the sampled atmosphere and displays the gas
concentrations present for its target gases.

If a sensor is in a sensor life warning condition, the gas name flashes. A sensor life
warning indicates that the sensor is nearing the end of its useful life.

In a low-light environment, press and release any button to turn on the display backlight.
See pg.151 to program backlight duration.

If CONFIRMATION is set to ON in the Maintenance Mode menu (see pg.154), the GX-
6000 beeps periodically to confirm that it’s operating.

Monitoring an Area

1 . Start up the GX-6000 as described above in “Start Up” on page 25. It is now in

Measuring Mode.

2 . Take the GX-6000 to the monitoring area.

Put the probe tip in the area to be monitored.

NOTE: If the particle filter or hydrophobic filter become dirty or clogged, replace them.

If water enters the probe, dry out or replace the particle filter (if installed) and
shake any water out of the probe and off of the hydrophobic filter. If you notice
that water has entered the flow system through the probe, replace the probe’s
hydrophobic filter. See pg.112 for instructions to replace the particle filter and
the hydrophobic filter.

3 . Wait 10 - 15 seconds and observe the display for gas readings. If a reading is

observed, allow the reading to stabilize to determine the gas concentrations present.

NOTE: Response time increases with the length of the sample hose. Long sample hoses

will require more time to show a response at the GX-6000. The maximum
sample hose length recommended for the GX-6000 is 50 feet. Consult RKI
Instruments, Inc. for longer sample hose lengths.

4 . If a gas alarm occurs, take appropriate action. See pg.41.

GX-6000 Operator’s Manual Chapter 3: Operation • 33

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Using Optional Sample Hoses

The standard sample hose for the GX-6000 is 3 feet long. Optional samples hoses and
probes with longer hoses are available from 5 - 50 feet in 5 foot increments (see pg.129).
If you are considering using a hose and probe with a longer hose, keep in mind that a
longer hose will increase the GX-6000’s response time and the flowrate may decrease
close to the low flow alarm point.

CAUTION: Sample hose lengths of more than 50 feet are not recommended for the GX-

6000 because of flow rate reduction and increased response time. Consult
RKI Instruments, Inc. for hose lengths longer than 50 feet.

The chart below illustrates how response time is affected by the sample hose length.

Table 4: GX-6000 Response Time vs. Sample Hose Length

Hose Used

Probe & 3 Foot Hose (standard) 10 seconds

Probe & 10 Foot Hose 15 seconds

Probe & 30 Foot Hose 30 seconds

Probe & 50 Foot Hose 40 seconds

Typical Time to 90% of

Response (T90)

Combustible Gas Detection

There are three issues to keep in mind when monitoring for combustible gas.

• The catalytic combustible sensor will respond to any combustible gas. The standard
calibration gas for the GX-6000 catalytic combustible channel is methane (CH4). If the

instrument is calibrated to a different combustible gas, such as hexane or propane, the
gas name for the catalytic combustible channel will reflect the target gas.

The table below lists the conversion factors for several hydrocarbon gases if the GX-
6000 is calibrated to methane. To use this table, multiply the display reading on the
combustible gas channel by the factor in the appropriate row to obtain the actual gas
concentration. For example, if you are detecting pentane and the display reads 10%
LEL for the catalytic combustible channel, you actually have 10% LEL x 1.56 = 15.6%
LEL pentane present.

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Table 5: LEL Hydrocarbon Conversions

Gas

Acetone 1.79 Iso Butane 1.47

Acetylene 1.92 MEK 2.27

Benzene 2.00 Methane 1.00

Ethane 1.09 Methanol 1.92

Ethanol 2.50 Pentane 1.56

Ethylene 1.06 Propane 1.35

Heptane 2.50 Propylene 1.32

Hexane 2.08 Toluene 3.13

Hydrogen 1.25 Xylene 4.27

IPA 2.78

LEL Conversion

Factor (CH

Cal.)

4

Gas

LEL Conversion Factor

Cal.)

(CH

4

• The GX-6000 provides the catalytic combustible sensor with some protection against
exposure to high levels of combustible gas which can damage the sensor. It does this
by turning off the combustible sensor power temporarily when it determines that an
over scale (more than 100 %LEL) concentration of combustible gas is present that
may damage the sensor. Nevertheless, concentrations of combustible gas of more than
100 %LEL can still affect the zero level or calibration of the combustible sensor if the
concentration is high enough.

CAUTION: Do not expose the catalytic combustible sensor to high concentrations of

combustible gas such as that from a butane lighter. Exposure to high
concentrations of combustible gas may adversely affect the performance of
the sensor.

CAUTION: Any rapid increase in the combustible gas reading on the catalytic

combustible channel followed by a declining or erratic reading may
indicate a gas concentration above the LEL which may be hazardous.

• Some gases such as silicone vapors, chlorinated hydrocarbons, and sulphur
compounds can contaminate the detection elements inside the combustible sensor
damaging the sensor and result in reduced response to combustible gas. Make every
effort to avoid these gases.

GX-6000 Operator’s Manual Chapter 3: Operation • 35

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VOC Detection

When monitoring for VOCs using the PID sensor, keep the following in mind:

• Regardless of what gas the PID sensor is calibrated to (factory calibration is to
isobutylene), the PID sensor will still detect and respond to a variety of volatile
organic compounds (VOCs).

• The PID channel will indicate an upscale reading if one of a variety of combustible
gases is present. If %LEL concentrations of one of these combustible gases is present,
the PID channel may indicate an overscale reading.

• If concentrations of methane greater than 10% LEL are present in the monitoring
environment, the PID channel’s reading will be suppressed.

• The PID sensor will also respond to H2S and NH3, so if H2S or NH3 is present, the
PID channel may indicate an upscale reading depending on the concentration present.

• If your instrument has both a low range PID sensor and a high range PID sensor
installed and if you are monitoring for gases in the higher range, the low range PID
channel may be in over range alarm while monitoring, depending on the level of
VOCs present.

• If you have 2 PID sensors installed, they might both be displayed as “VOC”. The
channel that appears first is based on the following sensor priority.

High Priority

Low Priority

10.6 eV low range PID

10.0 eV/benzene PID

11.7 eV PID

10.6 eV high range PID

NOTE: If you have changed the factory-set channel assignments using the

CONFIGURE CH menu item in User Mode, the order of displayed sensors

may be different and you will need to remember how you set your instrument
up.

Oxygen Detection

Exposing the galvanic oxygen sensor to halogen gas or sulfides may shorten the sensor’s
life or cause malfunctions or inaccurate gas readings. Minimize the sensor’s exposure to
these gases as much as possible. If exposure occurs, allow the instrument to draw fresh air
and confirm that the readings return to fresh air values.

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Snap Log Mode

REC DATA

REC. DATA

NUMBER 001

YES : ENTER

REC DATA

REC. DATA

STATION ID

TANK 5

NO : DISP

REC DATA

REC. DATA

05/20/2015

MM/DD/YYYY

3:38

REC DATA

CH4 O2

%LEL %

H2S CO

ppm ppm

VOC

ppm

0 20.9

0.0 0

0

The snap logging function in Snap Log Mode allows the user to record data at a specific
time and have it saved to the data logger. The data is assigned a snap log ID and is saved
with the station ID that was in use when the data was taken.

To enter Snap Log Mode and record snap log data:

1 . While the unit is in Measuring Mode, press and hold the SHIFT ▼ (PANIC) button,

then press and hold the ▲AIR button and hold both until you hear a beep. The unit

will cycle through the following screens.

The first screen displays what snap log ID will be given to this particular set of data
and that you should press the POWER ENTER button to save a set of snap log data.
The snap log ID number increases sequentially with each set of snap log data taken.
The second screen displays what Station ID will be associated with this snap log and
that you should press the DISP/LOCK button to exit Snap Log Mode without saving
a set of snap log data. The third screen displays the year, month, day, and time of the
snap log. The fourth screen displays the current gas readings.

NOTE: If the GX-6000 detects an alarm condition while in Snap Log Mode, it will

automatically exit Snap Log Mode and return to Measuring Mode. You may
then reenter Snap Log Mode and take snap logs while the instrument is still in
alarm.

GX-6000 Operator’s Manual Chapter 3: Operation • 37

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2 . You can change the Station ID to be used with the snap log by pressing the SHIFT ▼

4:07

STATION ID

VALVE 3

(PANIC) button and then pressing the DISP/LOCK button. The Station ID Select
Screen will appear and the current Station ID will be flashing.

3 . Use the ▲AIR and SHIFT ▼ (PANIC) buttons to scroll to the desired Station ID,

then press and release the POWER/ENTER button to return to the Snap Logging
Screen sequence.

To return to the Snap Logging Screen sequence without changing the Station ID,
press and release the DISP/LOCK button.

4 . To take a snap log of the current gas readings, press and release the POWER/ENTER

button. The unit will display SAVED along the bottom of the screen before returning
to the Snap Logging Screen sequence.

To exit Snap Log Mode without taking a snap log or when you are finished recording
snap logs, press and release the DISP/LOCK button. The unit will immediately
return to the Measuring Mode Screen.

The data recorded in Snap Log Mode can be viewed in Display Mode. See pg.60 for
more information.

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Measuring Mode, Alarms

This section covers alarm indications in Measuring Mode. It also describes how to reset
the GX-6000 after an alarm has occurred and how to respond to an alarm condition.

NOTE: False alarms may be caused by radio frequency (RF) or electromagnetic (EMI)

interference. Keep the GX-6000 away from RF and EMI sources such as radio
transmitters or large motors.

Alarm Indications

The GX-6000 buzzer will sound an alarm, the LEDs will flash, and the vibrator will pulse
when any sort of alarm condition or failure is encountered.

NOTE: If an alarm condition occurs while you are in Display Mode, the GX-6000 will

automatically bring up the alarm screen instead.

The table below summarizes the types of alarms produced by the GX-6000 and their
indications.

None of the Man Down alarm indications will happen if MAN DOWN is set to OFF in
Maintenance Mode (factory setting).

Alarm Type Visual Indications Other Indications

Low Alarm

Concentration of gas rises
above the Low Alarm setting or
falls below the Low Alarm
setting for O

High Alarm

Concentration of gas rises
above the High Alarm setting.

TWA or STEL

Concentration of CO, H
high range VOC rises above the

TWA or STEL alarm setting.

.

2

S, or

2

Table 6: Alarm Types and Indications

• Affected channel display
alternates between gas reading
and AL1

• Alarm LED arrays flash in circle
sequence once per second

• Backlight turns on

• Affected channel display
alternates between gas reading
and AL2

• Alarm LED arrays flash in circle
sequence twice per second

• Backlight turns on

• Affected channel display
alternates between gas reading
and TWA or STEL

• Alarm LED arrays flash in circle
sequence once per second

• Backlight turns on

• High-low tone sounding
twice per second

• Vibrator pulses once per
second

• High-low tone sounding
four times per second

• Vibrator pulses twice
per second

• High-low tone sounding
twice per second

• Vibrator pulses once per
second

GX-6000 Operator’s Manual Chapter 3: Operation • 39

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Table 6: Alarm Types and Indications

Alarm Type Visual Indications Other Indications

Over Range • Affected channel display

alternates between OVER
displayed where the gas reading
normally is and OVER displayed
where the reading units normally
are

• Alarm LED arrays flash in circle
sequence twice per second

• Backlight turns on

Low Flow • The display indicates FAI L LOW

FLOW

• Alarm LED arrays flash once per
second

• Backlight turns on

Low Battery Warning • The last bar in the battery icon

disappears and the battery icon
starts flashing

Dead Battery Alarm • Gas readings disappear and FAIL

BATTERY appears at the top of

the screen

• Alarm LED arrays flash once per
second

• High-low tone sounding
four times per second

• Vibrator pulses twice
per second

Double pulsing tone once
per second

None

Double pulsing tone once
per second

Sensor Failure • SENSOR appears at the top of the

screen and the failed sensor(s) are
indicated with FAIL under the
gas name.

• Alarm LED arrays flash once per
second

Clock Failure • FAIL C L OC K appears at the top

of the screen

• Alarm LED arrays flash once per
second

System Failure • FAIL SYSTEM appears at the

top of the screen and an error code
displays below it

• Alarm LED arrays flash once per
second

Man Down Warning 1

The WARNING 1 TIME
defined in Maintenance Mode
has passed since the instrument
detected movement.

• Alarm LED arrays flash once per
second

Double pulsing tone once
per second

Double pulsing tone once
per second

Double pulsing tone once
per second

Single pulsing tone once
per second

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Table 6: Alarm Types and Indications

Alarm Type Visual Indications Other Indications

Man Down Warning 2

The WARNING 2 TIME
defined in Maintenance Mode
has passed since the instrument
detected movement.

Man Down Alarm

The ALARM TIME defined in
Maintenance Mode has passed
since the instrument detected
movement.

Panic

User presses and holds the

SHIFT ▼ (PANIC) button.

• Alarm LED arrays flash twice per
second

• MAN DOWN flashes at top of
screen in place of time

• Alarm LED arrays flash in circle
sequence twice per second

• Screen unaffected for 5 seconds
before alarm starts

• MAN DOWN flashes at top of
screen in place of time

• Alarm LED arrays flash in circle
sequence twice per second

• Backlight turns on

Single pulsing tone twice
per second

• High-low tone sounding
twice per second

• Vibrator pulses twice
per second

• Single pulsing tone
twice per second for 5
seconds before alarm
starts

• High-low tone sounding
twice per second

• Vibrator pulses twice
per second

Responding to Alarms

This section describes response to gas, over range, battery, sensor failure, clock failure,
system failure, man down, and panic alarms.

Responding to Gas Alarms

1 . Determine which gas alarm has been activated.

2 . Follow your established procedure for an increasing gas condition or a decreasing

oxygen condition.

3 . Reset or silence the alarm as necessary or allowed. Table 7 below summarizes

resetting and silencing alarms for all ALARM LATCHING and ALARM
SILENCE combinations that are possible. See pg.150 and pg.150 for further
descriptions of these parameters.

GX-6000 Operator’s Manual Chapter 3: Operation • 41

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Table 7: Resetting and Silencing Alarms

ALARM LATCHING: LATCHING ALARM LATCHING: SELF RESET

ALARM
SILENCE:
ON

ALARM
SILENCE:
OFF

(factory setting)

• Press and release the RESET button
to silence the buzzer.

• If the gas concentration was still
above the alarm level when the
button was pressed, the LED arrays
continue to flash, the vibrator
continues to pulse, and the GX­6000 continues to display the
current alarm level.

• The gas reading must fall below (or
rise above for an oxygen low alarm)
an alarm setting before you can
reset the alarm, the LEDs, and the
vibrator using the RESET button.

• RESET button will not silence
buzzer.

• The gas reading must fall below (or
rise above for an oxygen low alarm)
an alarm setting before you can
reset the alarm condition using the
RESET button.

Responding to Over Range Alarms

• Press and release the RESET button
to silence the buzzer.

• The RESET button will not reset the
alarm.

• Alarm, LEDs, and vibrator will
automatically reset when gas reading
falls below (or rises above for an
oxygen low alarm) an alarm setpoint.

• RESET button will not silence or
reset alarm.

• Alarm condition will automatically
reset when gas reading falls below
(or rises above for an oxygen low
alarm) an alarm setpoint.

WARNING: An over range condition may indicate an extreme combustible gas,

toxic gas, or oxygen concentration. Confirm a normal condition with a
different GX-6000 or with another gas detecting device.

CAUTION: High off-scale readings may indicate an explosive concentration.

PRUDENCE: Des lectures élevées hors échelle peuvent indiquer une concentration

explosive.

1 . Determine which channel is in alarm.

2 . Follow your established procedure for an extreme gas condition.

NOTE: If your instrument has both a low range PID sensor and a high range PID sensor

installed and if you are monitoring for gases in the higher range, the low range
PID channel may be in over range alarm while monitoring, depending on the
level of VOCs present.

3 . Reset the alarm using the RESET button once the alarm condition has cleared.

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4 . Calibrate the GX-6000 as described on pg.68.

4:07

FAIL CLOCK

5 . If the over range condition continues or if you are not able to successfully calibrate

the unit, you may need to replace the sensor that has triggered the over range alarm.

6 . If the over range condition continues after you have replaced the sensor, contact RKI

Instruments, Inc. for further instructions.

Responding to Battery Alarms

WARNING: The GX-6000 is not operational as a gas monitoring device during a

dead battery alarm. Take the Model GX-6000 to a non-hazardous area
and replace or recharge the batteries as described on pg.104.

The GX-6000 is fully functional during a low battery warning. However, only a limited
amount of operating time remains, approximately 1 - 2 hours. The amount of time depends
on how often the LCD backlight is used and how often the unit is responding to alarm
conditions. Recharge the Li-ion battery pack or replace the alkaline batteries as soon as
possible as described in “Replacing or Recharging the Batteries” on page 104.

NOTE: Alarms and the LCD back light consume battery power and reduce the amount

of operating time remaining.

Responding to Sensor Failure Alarms

1 . Determine which sensor has triggered the sensor failure alarm.

2 . Try calibrating the failed sensor, as described on pg.68 before replacing it.

3 . If the sensor failure continues, replace the sensor as described on pg.115.

4 . If the sensor failure condition continues after you have replaced the sensor, contact

RKI Instruments, Inc. for further instructions.

Responding to Clock Failure Alarms

A clock failure alarm occurs if the unit’s internal clock malfunctions.

1 . Press and release the RESET button to continue into Measuring Mode.

CAUTION: There will be no datalogging function if you operate the instrument after a

clock failure.

GX-6000 Operator’s Manual Chapter 3: Operation • 43

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2 . Attempt to change the date using the DATE menu item in Maintenance Mode. See

4:07

FAIL SYSTEM

0 2 2

pg.139.

3 . If the date cannot be set correctly, contact RKI Instruments, Inc. as soon as possible.

Responding to System Failure Alarms

1 . If a system failure occurs, the system failure screen will display an error code as

shown below:

2 . The error code meanings are shown in the table below:

Table 8: Error Code Explanation

Error Code Explanation

000 ROM failure

010 RAM failure

021 FRAM failure

022 FLASH memory failure

3 . If the error code is anything but 022 as shown above, the instrument cannot be used.

Contact RKI Instruments, Inc. as soon as possible.

If the error code is 022, you may press and release the RESET button to continue into
Measuring Mode if the instrument must be used temporarily.

CAUTION: There will be no datalogging function if you operate the instrument after a

022 system failure. Contact RKI Instruments, Inc. as soon as possible.

Responding to a Man Down Warning 1 and Warning 2

The Man Down Warning 1 and Warning 2 alarms occur after the WARNING 1 TIME and
WARNING 2 TIME, respectively, has passed since the last movement of the instrument.

See pg.157 and pg.157 for instructions to change these values.

1 . Follow your established procedure for a man down warning.

2 . To silence the alarm and reset the Man Down clock, move the instrument or press

and release the RESET button.

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Responding to a Man Down Alarm

The Man Down Alarm alarms occur after the ALARM TIME has passed since the last
movement of the instrument. See pg.157 for instructions to change this value.

1 . Follow your established procedure for a man down alarm.

2 . To silence the alarm and reset the Man Down clock, press and release the RESET

button. Moving the instrument will not reset the alarm or Man Down clock.

Responding to a Panic Alarm

If the user is in a dangerous situation or feels that others must be alerted to any sort of

problem, holding the SHIFT ▼ (PANIC) button will initiate a panic alarm.

1 . Press and release the RESET button to silence and reset the alarm.

Data Logging

NOTE: The GX-6000 only logs data while in Normal Mode. If the GX-6000 is used in

Leak Check Mode or Bar Hole Mode, no downloadable data will be logged
while it is in either of these two modes.

The GX-6000 features the ability to log data to its internal memory and download it to a
computer via the infrared communications port on the front of the unit. It logs gas readings
in Measuring Mode, alarm data, and calibration data.

NOTE: The data logging function is separate from the snap logging function. For a

description of the snap logging function, see “Snap Log Mode” on page 37.

To utilize the GX-6000’s downloading capability, you will need the GX-6000 Data Logger
Management Program and a computer with an infrared port or a USB port that runs one of
the following operating systems: Windows 7, Windows 8, or Windows 10. If your
computer has an infrared port, then no additional accessories are needed to download data
from the GX-6000. If your computer does not have an infrared port but does have a USB
port, a USB/IrDA adapter cable can be used to download data from the GX-6000 using the
USB port. The GX-6000 Data Logger Management Program is available at
www.rkiinstruments.com/gx6000. The USB/IrDA adapter cable is available from RKI
Instruments, Inc.

The data logging capacity depends on how often the GX-6000 stores data, how many
channels are active, and how often the GX-6000 is turned on and off. The table below
illustrates how much data logging time is available for the various interval times. It
assumes that the unit is a standard four sensors plus PID unit, is only turned on once, and
there are no alarm occurrences. See “Updating the Data Log Interval Setting (LOG
INTERVAL)” on page 158 for instructions on setting the data logging interval time.

GX-6000 Operator’s Manual Chapter 3: Operation • 45

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Table 9: Data Logging Capacity

Interval

Time

10 seconds 10 hours

20 seconds 20 hours

30 seconds 30 hours

1 minute 60 hours

3 minutes 180 hours

5 minutes 300 hours

10 minutes 600 hours

Data Logging Time

For a complete description of the Data Logger Management Program and procedures for
downloading data to a computer, see the GX-6000 Data Logger Management Program
Operator’s Manual.

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Chapter 4: Display Mode

This section describes using the GX-6000 in Display Mode. See Table 10 below for a list
of Display Mode’s menu items, a short description of each item, and the page number for
further description.

Table 10: Display Mode Items

Menu Item (page number) Description

SELECT PID LIST (pg.48) Define the PID channel’s gas name

PEAK (pg.50) View and clear peak readings

STEL (pg.51) View STEL readings (H

TWA (pg.51) View TWA readings (H

ALARM POINTS (pg.52) View the alarm points

OPERATION TIME (pg.54) View the time in operation

DATE AND BATTERY (pg.54) View the date/time, battery voltage, and battery type

LOG REMAIN (pg.55) View the log time remaining

LOG CLEAR (pg.55) Clear the log data

PUMP OFF (pg.57) Turn the pump on or off (if the PUMP OFF DISP item in

Maintenance Mode is set to ON)

USER ID (pg.58) Select the user ID (if the ID DISPLAY item in Maintenance

Mode is set to ON)

STATION ID (pg.59) Select the station ID (if the ID DISPLAY item in Maintenance

Mode is set to ON)

REC. DATA DISP (pg.60) View snap logger data

PEAK BAR (pg.62) Turn the peak bar function on or off

S, CO, and high range PID only)

2

S, CO, and high range PID only)

2

GAS DISP (pg.63) Change how the gas readings are displayed

INVERT SELECT (pg.64) Turn the LCD flip function on or off

CAT (LEL) SENSOR (pg.65) Turn the combustible sensor protection on or off

LCD BACKGROUND (pg.66) Reverse the black/white of the LCD

LANGUAGE (pg.66) Change the instrument’s language back to English (only appears

if the language has been changed to something other than
English)

Tips for Using Display Mode

• To enter Display Mode and scroll from one menu item to the next or skip an item when
a question is asked, press and release the DISP/LOCK button.

GX-6000 Operator’s Manual Chapter 4: Display Mode • 47

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• To enter an item, press and release the POWER/ENTER button.

DISP

SELECT PID LIST

PID SET TO

Isobutylene

10.6 eV

CHANGE :ENTER

KEEP :DISP

EXIT :RESET

• To change a flashing parameter, use either the ▲AIR button or SHIFT ▼ (PANIC)

button.

• To return to Measuring Mode from the top level of any menu item, press and release
the RESET button.

NOTE: With the exception of the Pump Off Screen, each screen displays for 20

seconds. If you do not press a button within 20 seconds, the GX-6000
automatically returns to Measuring Mode. If the Pump Off Screen is used to
turn the instrument’s pump off, the Pump Off Screen will display until you turn
the pump back on.

PID Gas Name Screen

The standard PID channel is configured for and calibrated to isobutylene. If calibration to
a different gas is required for an application, the PID channel can also be configured for
other gases. Regardless of what gas the PID sensor is configured for and calibrated to, the
sensor will still detect and respond to a variety of volatile organic compounds (VOCs).

If you configure the instrument for another gas, the instrument will retain that
configuration until you change it again. Turning the instrument off and on does not change
this setting.

If there are 2 PID sensors installed in your GX-6000, the PID Gas Name Screens will
appear in Display Mode in the following order regardless of their position in the flow
system: 10.0 eV/benzene, 10.6 eV, 11.7 eV.

1 . With the PID Gas Name Screen displayed, press and release the POWER/ENTER

button. The top level of the PID Gas Name List will be displayed and the cursor will
be next to the letter corresponding to the first letter of the current setting. In the
example below, the PID channel is configured for isobutylene so the cursor is next to
“I”. Each letter has a list of gas names behind it.

At the top of the letter list, there is a User List item and a Recent List item. The User
List can hold 30 gas names. See pg.245 for instructions to edit the User List. The
Recent List can hold up to 8 gas names and is made up of the 8 most recently used
gas names. The Recent List is not user editable.

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2 . Use the ▲AIR and SHIFT ▼ (PANIC) buttons to scroll through the letter and list

DISP

SELECT PID 11/24

F -
G -
H -

I-
J -
K -

L -

M -

DISP

I -

I s o b u t a n o l

I s o b u t y l a c e t a t

I s o b u t y l a c r y l a

I s o b ut y l e n e
I s o b u t y l e n e epo
I s o b u ty r a l d e hy d

I s o b u t y r ic a c i d

I s o d e c a n o l

DISP

I - 17/46

#396 C4H8

VOC RF 1.00

I s o b ut y l e n e

options. To view the gas names behind a letter, User List, or Recent List, press and
release the POWER/ENTER button when the cursor is next to the desired letter.

3 . Use the ▲AIR and SHIFT ▼ (PANIC) buttons to scroll through the gas names.

4 . To view the information for each gas name, press and release the POWER/ENTER

button when the cursor is next to the desired gas name. The number in the upper left
corner is the gas’s number in relation to all other gas names that are stored in the
GX-6000. The chemical formula is displayed next to the gas number. The response
factor relative to isobutylene is listed on the second line. The gas name is listed on
the third line.

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5 . To select a gas name, press and release the POWER/ENTER button while you are

PEAK

CH4 O2

%LEL %

H2S CO

ppm ppm

VOC

ppm

10 15.0

13.0 200

2000

PEAK

PEAK CLEAR

HOLD

PEAK

PEAK CLEAR

RELEASE

viewing the parameters. The selection will be in effect until you change it again.

To return to the gas name list without saving any changes, press and release the
DISP/LOCK button.

6 . To return to the top level PID Gas Name List that has all of the letter choices, press

and release the DISP/LOCK button.

7 . To return to the PID Gas Name Screen, press and release the DISP/LOCK button one

more time.

Peak Screen

The peak screen displays the highest (lowest for oxygen) concentrations detected since the
GX-6000 was turned on. Peak readings are stored in the GX-6000’s memory until a higher
level is detected (lower for oxygen), the peak reading is cleared, or the GX-6000 is turned
off.

The lunch break feature enables the GX-6000 to save peak readings when it is turned off
so it can continue them when it is turned on again. See “Turning On the GX-6000” on
page 25.

To clear the peak readings, do the following:

1 . With the Peak Screen displayed, press and hold the RESET button. The following

screen sequence will occur.

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2 . Release the RESET button. The peak readings will be reset and the unit will return to

STEL

H2S CO

ppm ppm

VOC

ppm

2.0 10

10.0

TWA

H2S CO

ppm ppm

VOC

ppm

0.5 5

5.0

the Peak Screen.

If you do not want to clear the peak readings, release the RESET button before the
above screen sequence occurs. The unit will return to the Peak Screen.

STEL Screen

The STEL Screen displays the short term exposure limit (STEL) readings for H2S, CO,
and high range VOC only. The STEL reading is the average reading over the last 15

minutes.

TWA Screen

The TWA Screen displays the time weighted average (TWA) readings for H2S, CO, and
high range VOC only.

The TWA reading is the average reading over the last 8 hours. If 8 hours have not elapsed
since the last time the TWA reading was cleared, the average is still calculated over 8
hours. The missing time is assigned a 0 value for readings. If LUNCH BREAK is set to
OFF, the TWA is cleared when the GX-6000 is turned off.

If LUNCH BREAK is set to ON, the GX-6000 will remember TWA readings when it is
turned off so it can continue them when it is turned on again. See pg.25.

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View Alarm Settings Screen

DISP

ALARM POINTS

YES :ENTER

NO :DISP

EXIT :RESET

The View Alarm Settings Screen gives you the option to view the gas alarm settings for all
active channels.

To view the gas alarm settings, do the following:

1 . With the View Alarm Settings Screen displayed, press and release the POWER/

ENTER button. The Full Scale Settings screen will appear showing full scale settings

for each channel. Use the ▲AIR and SHIFT ▼ (PANIC) buttons to scroll through the

Warning, Alarm, STEL, and TWA settings.

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F.S.

CH4 O2

%LEL %

H2S CO

ppm ppm

VOC

ppm

100 40.0

100.0 500

6000

AL1

CH4 O2

%LEL %

H2S CO

ppm ppm

VOC

ppm

10 19.5

5.0 25

400.0

AL2

CH4 O2

%LEL %

H2S CO

ppm ppm

VOC

ppm

50 23.5

30.0 50

1000

STEL

H2S CO

ppm ppm

VOC

ppm

1.0 25

60.0

TWA

H2S CO

ppm ppm

VOC

ppm

5.0 200

40.0

▲ AIR

▲ AIR

▲ AIR

▲ AIR

▲ AIR

SHIFT ▼ (PANIC)

2 . Pressing and releasing the POWER/ENTER button while in a settings screen will

cause the instrument to simulate that condition. The buzzer, LED’s, and vibration
will activate. Press and release the POWER/ENTER button again to stop the
simulated alarm.

3 . Press and release the DISP/LOCK button to return to the View Alarm Settings

Screen.

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Time in Operation Screen

DISP

OPERATION TIME

0:02

DISP

DATE AND BATTERY

5/12/2015

MM/DD/YYYY

1:57

4.1V
BATTERY TYPE

ALKALINE

The Time In Operation Screen displays the length of time since the GX-6000 was turned
on if the lunch break feature is turned off. With LUNCH BREAK set to OFF, the time in
operation is reset when the GX-6000 is turned off. See “Updating the Lunch Break Setting
(LUNCH BREAK)” on page 152 for a description of the lunch break feature.

If LUNCH BREAK is set to ON, the time in operation will only be reset if you do not
choose to resume the peak and TWA measurements when the GX-6000 is turned on in the
Lunch Break Screen described in Step 3 on page 26. If you choose to resume the peak and
TWA measurements during startup, the GX-6000 will include the time in operation when
the unit was last turned off in the current time in operation.

Date/Time, Battery Voltage Screen

The Battery Voltage Screen displays the current battery voltage. Fully charged alkaline
batteries typically indicate around 6.0 volts; a fully charged Li-ion battery pack typically
indicate 4.1 volts. This screen also displays during the startup sequence.

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Log Time Remaining Screen

DISP

LOG REMAIN

129 HOUR

DISP

LOG CLEAR

YES :ENTER

NO :DISP

EXIT :RESET

The Data Logging screen displays the time remaining until the data logger memory is full.

LOG CLEAR Screen

CAUTION: Once you clear the data logger, you cannot retrieve any data previously

stored in the data logger.

The LOG CLEAR screen asks if you want to clear the data logger memory.

To continue through Display Mode without clearing the log data, press and release the
DISP/LOCK button.

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To clear the data logger memory, do the following:

DISP

LOG CLEAR

YES : ENTER

NO : DISP

CONFIRM ?

DISP

LOG CLEAR

CLEAR

1 . With the LOG CLEAR Screen displayed, press and release the POWER/ENTER

button. The following screen appears asking you to confirm that you want to clear
the data logger memory.

2 . If you do not want to clear the data logger memory, press and release the DISP/

LOCK button. The unit will return to the LOG CLEAR screen in Display Mode.

3 . If you want to clear the data logger memory, press and release the POWER/ENTER

button. The unit will display the following screen as it clears the data.

4 . When the instrument has cleared the data, it will return to the LOG CLEAR screen

in Display Mode.

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Pump Off Screen

DISP

PUMP OFF

YES :ENTER

NO :DISP

EXIT :RESET

1:44

PUMP OFF

OFF

WARNING: The GX-6000 is not a gas monitoring device while the pump is off.

NOTE: The item appears in Display Mode only if the PUMP OFF DISP menu item in

Maintenance Mode is turned ON. The factory setting for PUMP OFF DISP is
OFF.

This feature can be used to conserve battery life if there is a significant period of time until
the next gas monitoring task, but you do not want to wait for the warm-up sequence to
complete if you turn the instrument off and on again.

1 . In this screen, press and release the POWER/ENTER button to turn the pump off.

The fan symbol in the upper right corner will disappear. Once the pump is off, you
cannot exit this screen and return to Measuring Mode or continue in Display Mode
until you turn the pump back on.

2 . To turn the pump back on and continue in Display Mode or return to Measuring

Mode, press and release the DISP/LOCK button.

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Select User ID Screen

DISP

USER ID

KIMBERLY

DISP

USER ID

KIMBERLY

This screen only appears in Display Mode if the ID DISPLAY item in Maintenance Mode
is set to ON. Use this screen to select a user ID from the user ID list in the GX-6000’s
memory. The current user ID is displayed. A user ID can be up to 16 characters long. The
GX-6000 can store up to 128 user IDs.

The user ID provides a way to identify the GX-6000 user during a data logging session.
See the GX-6000 Data Logger Management Program Operator’s Manual for a detailed
description of data logging and the user ID.

The user ID list cannot be edited using the GX-6000 user interface. The GX-6000
Maintenance Data Loader Program is required to define or change user IDs in the user ID
list. For a detailed description of editing the list of user IDs stored in the GX-6000, see the
GX-6000 Maintenance Data Loader Program Operator’s Manual.

To select a different user ID:

1 . With the Select User ID Screen displayed, press and release the POWER/ENTER

button. The current user ID will be displayed and it will be flashing.

2 . Use the ▲AIR and SHIFT ▼ (PANIC) buttons to scroll through the available user

IDs. The list will wrap around if you get to the top or bottom. Any of the user IDs in
the list that have not been changed from the factory setting will be shown as
USER_ID_XXX where the “XXX” is a number from 001 to 128.

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3 . When the desired user ID is displayed, press and release the POWER/ENTER

DISP

STATION ID

TANK 5

button.

NOTE: To exit the selection screen without saving a change, press and release the

DISP/LOCK button. You will return to the Select User ID screen without
saving the user ID change.

4 . The unit will save the selected user ID as the current one and will return you to the

Select User ID Screen.

Select Station ID Screen

This screen only appears in Display Mode if the ID DISPLAY item in Maintenance Mode
is set to ON. Use this screen to select a station ID from the station ID list in the GX-6000’s
memory. The current station ID is displayed. A station ID can be up to 16 characters long.
The GX-6000 can store up to 128 station IDs.

The station ID provides a way to identify a location where monitoring was done during a
data logging session. See the GX-6000 Data Logger Management Program Operator’s
Manual for a detailed description of data logging and the station ID.

The station ID list cannot be edited using the GX-6000 user interface. The GX-6000
Maintenance Data Loader Program is required to define or change station IDs in the
station ID list. For a detailed description of editing the list of station IDs stored in the
GX-6000, see the GX-6000 Maintenance Data Loader Program Operator’s Manual.

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To select a different station ID:

DISP

STATION ID

TANK 5

DISP

REC. DATA DISP

YES :ENTER

NO :DISP

EXIT :RESET

1 . With the Select Station ID Screen displayed, press and release the POWER/ENTER

button. The current user ID will be displayed and it will be flashing.

2 . Use the ▲AIR and SHIFT ▼ (PANIC) buttons to scroll through the available station

IDs. The list will wrap around if you get to the top or bottom. Any of the station IDs
in the list that have not been changed from the factory setting will be shown as
STATION_ID_XXX where the “XXX” is a number from 001 to 128.

3 . When the desired station ID is displayed, press and release the POWER ENTER

button.

NOTE: To exit the selection screen without saving a change, press and release the

DISP/LOCK button. You will return to the Select Station ID screen without
saving the station ID change.

4 . The unit will save the selected station ID as the current one and return you to the

Select Station ID Screen.

Viewing Snap Logger Data

The Snap Logging Screen allows you to view data from previous snap logs. For
information on how to use the snap logging feature, see “Snap Log Mode” on page 37.

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1 . With the snap logging screen displayed, press and release the POWER/ENTER

REC DATA

REC. DATA

NO DATA

REC DATA

DATE

5/20/2015

MM/DD/YYYY

3:40

NUMBER 001

TANK 5

No snap logs taken Snap logs taken

REC DATA

CH4 O2

%LEL %

H2S CO

ppm ppm

VOC

ppm

0 20.9

0.0 0

0

button. The screen that appears will depend on whether or not any snap logs have
been taken.

2 . If snap logs have been taken, the screen indicates the year, month, day, and time that

the most recent snap log was taken.

The number near the bottom of the screen indicates the snap log ID number. The first
snap log that is taken is given an ID of 001. The next snap log ID is 002. The ID
number increases sequentially with each set of snap log data.

The last line of the screen indicates the Station ID that was used for the snap log.

3 . Use the ▲AIR and SHIFT ▼ (PANIC) buttons to scroll through different snap

log IDs.

4 . To view the data in a snap log ID, press and release the POWER/ENTER button.

The gas readings that were taken during the snap log are displayed. You can use the

▲AIR and SHIFT ▼ (PANIC) buttons to scroll through the different snap logs. The

gas readings will change as you view different snap log data but the snap log ID is
not visible from this screen. To scroll through the data by viewing the snap log ID
number, press and release POWER/ENTER.

5 . To return to the Snap Logging Screen, press and release the DISP/LOCK button.

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Peak Bar Screen

DISP

PEAK BAR

YES :ENTER

NO :DISP

EXIT :RESET

The Peak Bar Screen allows you to turn the peak bar on or off. If the function is turned on,
the peak bar appears along the right side of each gas reading in Measuring Mode and on
the Peak Screen in Display Mode. It shows the peak readings for each channel in bar graph
format.

1 . With the Peak Bar Screen displayed, press and release the POWER/ENTER button.

The current setting will be displayed.

2 . Use the ▲AIR and SHIFT ▼ (PANIC) buttons to display the desired setting.

3 . Press and release the POWER/ENTER button to save the setting and return to the

Peak Bar Screen.

To return to the Peak Bar Screen without saving any changes, press and release the
DISP/LOCK button.

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Gas Display Screen

DISP

GAS DISP

YES :ENTER

NO :DISP

EXIT :RESET

DISP

GAS DISP

DISPLAY ALL

SCROLL AUTO
SCROLL MANUAL

The Gas Display Screen allows the user to choose how the gas readings are displayed in
Measuring Mode. A description of the choices can be found in Table 11 below. If anything
other than DISPLAY ALL is selected, the instrument will return to DISPLAY ALL when
it is turned off and turned back on.

Option Description

Table 11: Gas Display Choices

DISPLAY ALL All active channels’ readings will be displayed at once

SCROLL AUTO One active channel will display at a time and the instrument will

automatically scroll through all active channels for the duration of the
operating session.

SCROLL MANUAL One active channel will display at a time and the user must press and

release the POWER/ENTER button to scroll through all active channels.
If the POWER/ENTER button is not pressed and released, the
instrument will display the same channel’s readings for the duration of
the operating session.

1 . With the Gas Display Screen showing, press and release the POWER/ENTER

button. The available choices will appear.

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2 . Use the ▲AIR and SHIFT ▼ (PANIC) buttons to move the cursor next to the desired

DISP

INVERT SELECT

YES :ENTER

NO :DISP

EXIT :RESET

setting.

3 . Press and release the POWER/ENTER button to return to the Gas Display Screen.

To return to the Gas Display Screen without saving any changes, press and release
the DISP/LOCK button.

LCD Flip Screen

If INVERT SELECT is set to ON, the instrument’s LCD will automatically flip if the
instrument is turned upside down. This allows for the LCD to be read with the instrument
right side up or upside down. If desired, holding down the DISP/LOCK button will lock
the screen in its current position and keep it from rotating. A LOCK symbol will flash at
the top of the screen to indicate that the LCD’s position is fixed. To unlock the LCD, hold
the DISP/LOCK button until the LOCK symbol disappears.

NOTE: Even if INVERT SELECT is set to ON, the screens in Calibration Mode, User

Mode, and Maintenance Mode will not flip if the instrument is turned upside
down.

If INVERT SELECT is set to OFF, the instrument’s LCD will not flip and can only be
read when the instrument is right side up. A LOCK symbol will appear at the top of the
screen to indicate that the LCD’s position is fixed.

1 . With the Gas Display Screen showing, press and release the POWER/ENTER

button. The current setting will be displayed.

2 . Use the ▲AIR and SHIFT ▼ (PANIC) buttons to display the desired setting.

3 . Press and release the POWER/ENTER button to return to the LCD Flip Screen.

To return to the LCD Flip Screen without saving any changes, press and release the
DISP/LOCK button.

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Combustible Sensor Protection Screen

DISP

CAT (LEL) SENSOR

PROTECTION

DISP

CAT (LEL) SENSOR

***WARNING***

NO LEL ALARMS IF

CAT (LEL) IS

DISABLED

ENABLED

If combustible gas levels greater than 100 %LEL are expected, the catalytic LEL sensor
can be disabled to protect it. If the catalytic LEL sensor is disabled, there will be no %LEL
alarms in Measuring Mode.

1 . With the CAT (LEL) SENSOR PROTECTION screen displayed, press and release

the POWER/ENTER button. The current setting will be displayed along with a
warning about no %LEL alarms if the catalytic LEL sensor is turned off.

2 . Use the ▲AIR or SHIFT ▼ (PANIC) button to display the desired setting.

NOTE: If the catalytic LEL sensor is disabled and if the instrument is then turned off

and back on, the catalytic LEL sensor will be enabled again.

3 . Press and release the POWER/ENTER button to return to the CAT (LEL) SENSOR

PROTECTION screen in Display Mode.

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LCD Background Color Flip

DISP

LCD BACKGROUND

YES :ENTER

NO :DISP

EXIT :RESET

DISP

LANGUAGE

CHANGE

TO ENGLISH

YES :ENTER

NO :DISP

EXIT :RESET

With LCD BACKGROUND set to ON, the LCD colors will flip. The background will be
black instead of white and the text will be white instead of black. With LCD
BACKGROUND set to OFF (factory setting), the LCD background will be white and the
LCD text will be black.

1 . With the LCD Background Flip Screen showing, press and release the POWER/

ENTER button. The current setting will be displayed.

2 . Use the ▲AIR and SHIFT ▼ (PANIC) buttons to display the desired setting.

3 . Press and release the POWER/ENTER button to return to the LCD Background Flip

Screen.

To return to the LCD Background Flip Screen without saving any changes, press and
release the DISP/LOCK button.

Language Screen

If the instrument’s language is changed to something other than English, the Language
Screen will appear in Display Mode. The Language Screen will not appear if the
instrument’s language is set to English. The Language Screen allows the user to change
the instrument’s language back to English.

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To change the language back to English, do the following:

DISP

LANGUAGE

CHANGE

TO ENGLISH

CONFIRM ?

1 . With the Language Screen showing, press and release the POWER/ENTER button.

The following screen will appear asking you to confirm that you want to change the
language back to English.

2 . Press and release the POWER/ENTER button again to confirm the change.

To return to the Language Screen without changing the instrument’s language to
English, press and release the DISP/LOCK button.

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Chapter 5: Calibration Mode

Overview

This section describes the GX-6000 in Calibration Mode. In Calibration Mode, you can
move through a menu of screens to do the following:

• Perform a fresh air (zero) adjustment

• Perform a span adjustment on all channels simultaneously using auto calibration

• Perform a span adjustment on one channel at a time using single calibration

• Perform a bump test

NOTE: You can set up the GX-6000 to alert you during the startup sequence when

calibration is due. See pg.141.

CAUTION: BEFORE EACH DAY’S USAGE, SENSITIVITY IN THE %LEL RANGE

MUST BE TESTED ON A KNOWN CONCENTRATION OF THE
COMBUSTIBLE TARGET GAS, METHANE, EQUIVALENT TO 25 - 50%
OF FULL SCALE CONCENTRATION (the %LEL full scale is 100 %LEL).
ACCURACY MUST BE WITHIN -0 to + 20% OF ACTUAL. ACCURACY
MAY BE CORRECTED BY FOLLOWING THE CALIBRATION
INSTRUCTIONS FOR THE COMBUSTIBLE CHANNEL BELOW.

If the combustible channel passes the above response test and does not require calibration,
the unit should still be calibrated periodically. The optimum frequency of calibration
depends heavily on how the GX-6000 is used. For example, instruments used daily may
need to be calibrated weekly or monthly, while instruments that are used only a few times
a year may need to be calibrated before each use. Typical calibration frequencies range
from monthly to quarterly. Make sure to perform the combustible channel response test as
described above and make sure to develop a calibration schedule tailored to your
application that takes this test and required calibration resulting from this test into account.

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Calibration Supplies and Equipment

To calibrate the GX-6000, you will need:

• Known calibrating samples of the gases being detected. The combustible and toxic gas
samples should have concentrations between 10 and 50% of the full scale value. For
example, if you are calibrating the catalytic combustible gas channel, your calibration
cylinder should have a combustible gas concentration between 10% LEL and 50%
LEL. An oxygen-free source, such as 100% nitrogen is recommended for setting the
oxygen zero.

CAUTION: When using auto calibration, although the GX-6000 can be calibrated with

an oxygen concentration of up to 19.5%, RKI Instruments, Inc.
recommends that the multi-gas cylinder have an oxygen concentration in
the range of 10% - 16% oxygen.

• A demand-flow regulator to provide adequate sample gas flow

NOTE: RKI Instruments, Inc. recommends that you dedicate a regulator for use with

chlorine (Cl2) gas and that you do not use that dedicated regulator for any other
gases, particularly hydrogen sulfide (H2S).

• Non-absorbent tubing

WARNING: If you are using a calibration kit that includes a gas bag and a fixed

flow regulator or dispensing valve, do not apply gas directly to the
GX-6000 with the regulator or dispensing valve or damage to the pump
will result.

To calibrate the %LEL, oxygen, CO, H2S, and PID sensors at the same time,
automatically, with no need for a zero-oxygen source, you can use the auto calibration

feature with either a 5-gas cylinder or a 4-gas cylinder and a PID cylinder. This chapter
includes instructions for both scenarios along with instructions for calibrating one channel
at a time using single calibration.

Entering Calibration Mode

To enter Calibration Mode, do the following:

1 . Find a fresh-air environment. This is an environment free of toxic or combustible

gases and of normal oxygen content (20.9%).

2 . While in Measuring Mode, press and hold the SHIFT ▼ (PANIC) button, then press

the DISP/LOCK button and release both buttons.

3 . If the unit prompts you for the password, enter it by using the ▲AIR and SHIFT ▼

(PANIC) buttons to select each password number and then pressing and releasing
POWER/ENTER to enter the number and move on to the next one.

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NOTE: You will only be prompted to enter a password if the PAS SW OR D menu item

CAL

CAL MODE

AIR CAL
AUTO CAL

SINGLE CAL

NORMAL MODE

in User Mode is set to ON. See “Turning the Password Function On or Off” on
page 100 for instructions to update the PASS WOR D setting and to choose a
password.

4 . The Calibration Mode Screen displays with the cursor next to AIR CAL.

NOTE: The following screens illustrate a five-gas GX-6000 for detection of CH4

(%LEL using catalytic sensor), oxygen, H2S, CO, and VOCs (high range PID
sensor). Your GX-6000 may display slightly different screens.

Calibrating Using the Auto Calibration Method

This method allows you to calibrate the CH4 (%LEL sensor), oxygen, H2S, CO, and VOC
(PID sensor) sensors simultaneously. It is designed for use with either the RKI 5-gas

calibration cylinder (high range PID only) or an RKI 4-gas cylinder and an RKI PID
cylinder and is the quickest and easiest method to calibrate the GX-6000. See Table 15 on
page 129 for available cylinders. Make sure your calibration cylinder is appropriate for the
PID detection range.

NOTE: The 5-gas calibration cylinder that includes LEL CH4/O2/CO/H2S/isobutylene

is a proprietary gas mix developed by RKI Instruments, Inc. for calibrating a
PID sensor in the presence of the other gases during an auto calibration. It can
also be used for a single calibration of a PID sensor. Do not use a similar gas
mix provided by any other manufacturer when calibrating a PID channel. Use
of a gas mix from another manufacturer that includes isobutylene and these
other gases will result in an inaccurate calibration.

Setting the Fresh Air Reading

1 . Find a fresh-air environment. This is an environment free of toxic or combustible

gases and of normal oxygen content (20.9%).

2 . While in Measuring Mode, press and hold the SHIFT ▼ (PANIC) button, then press

the DISP/LOCK button and release both buttons.

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3 . If the unit prompts you for the password, enter it by using the ▲AIR and SHIFT ▼

CAL

CAL MODE

AIR CAL
AUTO CAL

SINGLE CAL

NORMAL MODE

AIR

CH4 O2

%LEL %

H2S CO

ppm ppm

VOC

ppm

0 20.9

0.0 0

0

(PANIC) buttons to select each password number and then pressing and releasing
POWER/ENTER to enter the number and move on to the next one.

NOTE: You will only be prompted to enter a password if the PAS SW OR D menu item

in User Mode is set to ON. See pg.100 for instructions to update the
PASS WO RD setting and to choose a password.

4 . The Calibration Mode Screen displays with the cursor next to AIR CAL.

5 . Press and release the POWER/ENTER button. The Fresh Air Reading screen will

display.

6 . If you suspect any low-level VOC background in the area, you will need to use the

VOC zero filter.

NOTE: If you have both a PID and a CO2 sensor installed, you will need to follow the

directions on pg.208 instead of following the directions shown below.

a. Remove the plug from each end of the VOC zero filter.

b. Attach the VOC zero filter to the inlet fitting or probe. The filter does not have a

preferred flow direction.

c. Let the instrument draw through the VOC zero filter for 1 minute before

continuing.

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7 . To continue with the fresh air adjustment, press and hold the ▲AIR button.

AIR

AIR CAL

HOLD AIR KEY

AIR

AIR CAL

HOLD AIR KEY

ADJUSTING ZERO

AIR

AIR CAL

RELEASE AIR KEY

ZERO ADJUSTED

AIR

AIR CAL

ZERO ADJUSTED

CAL

CAL MODE

AIR CAL
AUTO CAL

SINGLE CAL

NORMAL MODE

AIR

AIR CAL

END

AIR

CH4 O2

%LEL %

H2S CO

ppm ppm

VOC

ppm

0 20.9

0.0 0

0

If you do not want to continue, press and release the DISP/LOCK button and the unit
will return to the Calibration Mode Screen.

8 . The GX-6000 will indicate that it is adjusting the zero reading for a few seconds and

then it will prompt you to release the ▲AIR button.

9 . Release the ▲AIR button. The fresh air adjustment will finish, the fresh air readings

will be displayed momentarily, and then the instrument will return to the Calibration
Mode Screen.

72 • Chapter 5 : Calibration Mode GX-6000 Operator’s Manual

10 . If the VOC zero filter was used, remove the filter from the GX-6000’s inlet fitting or

probe. Reinstall the plugs on each end of the filter.

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Performing a Span Adjustment

CAL

CAL MODE

AIR CAL

AUTO CAL
SINGLE CAL
NORMAL MODE

AUTO

AUTO CAL

CONCENTRATION
GAS SELECT
ESCAPE

1 . Install the demand flow regulator onto the 4-gas or 5-gas calibration cylinder.

2 . Connect the sample tubing to the demand flow regulator.

3 . Install the sample hose and probe on the GX-6000 inlet fitting. Make sure the probe’s

two halves are tightened firmly together to avoid leaks that can affect the calibration.
See Figure 22 on page 112 for an illustration of the internal parts of the probe.

4 . Move the cursor next to the AUTO CAL menu item by using the ▲AIR or SHIFT ▼

(PANIC) button.

5 . Press and release the POWER/ENTER button to display the Auto Cal Menu.

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6 . To check or update the gas concentrations, use the ▲AIR and SHIFT ▼ (PANIC)

AUTO

CONCENTRATION

CH4 50 %LEL
O2 12.0 %
H2S 25.0 ppm

CO 50 ppm

VOC 100 ppm

ESCAPE

buttons to put the cursor next to CONCENTRATION and press and release the
POWER/ENTER button to display the Calibration Gas Values Screen.

The gas concentrations displayed in the Calibration Gas Values Screen must match
the gas concentrations listed on the 5-gas cylinder or the 4-gas calibration cylinder
and the PID cylinder.
If all concentrations match, go to Step 12.
If one or more concentrations do not match, continue with Step 7.
If you do not want to continue with the concentration adjustment, press and release
the DISP/LOCK button to return to the Auto Cal Menu.

NOTE: The RKI 4-gas cylinder typically contains 12% O2 by volume. When using the

auto calibration method, be sure to set the “O2” auto calibration value to agree
with the concentration listed on the cylinder’s label, not zero.

7 . Use the ▲AIR and SHIFT ▼ (PANIC) buttons to place the cursor next to the channel

whose gas value you want to change.

8 . Press and release the POWER/ENTER button. The auto cal value will begin to flash.

9 . Use the ▲AIR and SHIFT ▼ (PANIC) buttons to adjust the calibration gas setting to

the desired value.

NOTE: The calibration gas value cannot be set lower than the low alarm setting. If the

calibration gas value listed on the calibration cylinder is lower than the current
low alarm setting, enter Maintenance Mode and change the low alarm setting.
See pg.148 for instructions. If you need to change the alarm point setting only
to perform a calibration, make sure that you change the alarm point setting back
to its original value once the calibration has been performed.

10 . Press and release the POWER/ENTER button to save the change. The calibration gas

value stops flashing.

11 . Repeat Step 7 through Step 10 for any other channels that need to be changed.

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12 . When you are done adjusting the calibration gas values, move the cursor to

AUTO

CONCENTRATION

CH4 50 %LEL
O2 12.0 %
H2S 25.0 ppm

CO 50 ppm

VOC 100 ppm

ESCAPE

AUTO

AUTO CAL

CONCENTRATION
GAS SELECT
ESCAPE

ESCAPE.

13 . Press and release the POWER/ENTER button. The instrument returns to the Auto

Cal Menu.

14 . Use the ▲AIR and SHIFT ▼ (PANIC) buttons to move the cursor next to GAS

SELECT.

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15 . Press and release the POWER/ENTER button. The first of the Gas Select Screens,

AUTO

GAS SELECT

CH4 50 %LEL

O2 12.0 %
H2S 25.0 ppm

CO 50 ppm

AUTO

GAS SELECT

VOC 100 ppm

AUTO

GAS SELECT

ESCAPE

▲ AIR or
SHIFT ▼ (PANIC)

▲ AIR or

SHIFT ▼ (PANIC)

▲ AIR or

SHIFT ▼ (PANIC)

APPLYGAS

CH4 O2

%LEL %

H2S CO

ppm ppm

0 20.9

0.0 0

the standard four sensors screen, will be displayed. In addition to the standard four
sensors screen, there is a separate screen for each installed smart sensor, and an

ESCAPE screen that will take you back to the Auto Cal menu. Use the ▲AIR and
SHIFT ▼ (PANIC) buttons to scroll through the different screens.

16 . With the standard four sensors screen displayed, press and release the POWER/

ENTER button to proceed to the Calibration In Process Screen with APPLYGAS
and the gas readings flashing.

If you do not want to proceed with the calibration, press and release the DISP/LOCK
button to return to the Gas Select Screen.

If you do want to continue with the calibration, proceed to the next step.

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17 . Connect the tubing from the demand flow regulator to the rigid tube on the probe.

AUTO

PASS

4:07

CH4 O2

%LEL %

H2S CO

ppm ppm

50 12.0

25.0 50

SEN LIFE

WARNING

CO

AUTO

GAS SELECT

VOC 100 ppm

*If your instrument is 4-gas
only and if START CAL
PASS is set to ON (factory
setting), the instrument will
automatically start the
warmup sequence.

POWER/ENTER
to acknowledge

AUTO

PASS

4:07

CH4 O2

%LEL %

H2S CO

ppm ppm

50 12.0

25.0 50

AUTO

GAS SELECT

VOC 100 ppm

*If your instrument is 4-gas
only and if START CAL
PASS is set to ON (factory
setting), the instrument will
automatically start the
warmup sequence.

Allow the GX-6000 to draw gas for one minute.

18 . Press and release the POWER/ENTER button to set the span adjustment for each

channel to the programmed values.

19 . If all channels passed calibration, and if SEN LIFE ALERT is set to ON, and if a

sensor is in a sensor life warning condition, the following screen sequence occurs.

The buzzer and LEDs activate in a double pulsing pattern in the sensor life warning
screen. Press and release POWER/ENTER to acknowledge the warning.

20 . If all channels passed calibration and if no sensors are in a sensor life warning

condition or if SEN LIFE ALERT is set to OFF (factory setting), the following
screen sequence occurs.

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21 . If any of the sensors cannot be adjusted to the proper value, a screen displays that

SENSOR

O2

%

H2S

ppm

FAIL

FAIL

SEN LIFE

WARNING

CO

indicates a calibration failure and lists the sensor(s) that failed to calibrate. In the
example below, the oxygen and H2S channels failed calibration. The other sensors

calibrated normally.

The buzzer and alarm LEDs activate in a double pulsing pattern. Press and release
the RESET button to reset the alarm and continue to the Gas Select Screen. After
calibrating the PID channel by following the instructions below, attempt to calibrate
the standard channels again. If the failure continues, investigate the cause. See
“Troubleshooting” on page 102.

If SEN LIFE ALERT is set to ON (factory setting is OFF) and if a sensor is in a
sensor life warning condition, the following screen appears. The buzzer and LEDs
activate in a double pulsing pattern. Press and release POWER/ENTER to
acknowledge the sensor life warning.

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The 4-gas Gas Select Screen displays.

AUTO

GAS SELECT

CH4 50 %LEL

O2 12.0 %
H2S 25.0 ppm

CO 50 ppm

AUTO

GAS SELECT

VOC 100 ppm

22 . If you were using a 5-gas calibration cylinder, continue to Step 23.

If you were using a 4-gas calibration cylinder:

a. Remove the tubing from the rigid tube on the probe.

b. Unscrew the 4-gas cylinder from the regulator.

c. Screw the PID calibration cylinder onto the demand flow regulator. Continue

with Step 24.

23 . If you are using a 5-gas calibration cylinder:

a. Leave the tubing connected to the rigid tube on the probe. Continue with Step 24.

24 . If the 4-gas calibration passed, the PID Gas Select Screen displays. If the 4-gas

calibration failed, use SHIFT ▼ (PANIC) to display the PID Gas Select Screen.

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25 . Press and release the POWER/ENTER button. The target gas selection screen will

AUTO

GAS SELECT

Isobutylene
Acetone

ESCAPE

APPLYGAS

VOC

ppm

0

display. This screen allows you to select the gas you want to use for calibration.
Isobutylene will always be displayed on the top line. The second line will show the
gas that is currently selected in the PID Gas Name Screen in Display Mode. In the
example below, acetone is the currently selected gas. If isobutylene is the selected
gas, then isobutylene will appear twice in this list.

26 . Use the ▲AIR and SHIFT ▼ (PANIC) buttons to move the cursor next to the gas you

want to use for calibration.

27 . Press and release the POWER/ENTER button to proceed to the Calibration In

Process Screen for the PID channel with APPLYGAS and the gas reading flashing.

If you do not want to proceed with the calibration, press and release the DISP/LOCK
button to return to the Gas Select Screen.

If you do want to continue with the calibration, proceed to the next step.

28 . If you are using a 5-gas calibration cylinder, continue with Step 29.

If you are using a PID only calibration cylinder:

a. Connect the tubing from the regulator to the rigid tube on the probe. Allow the

GX-6000 to draw gas for one minute.

b. Press and release the POWER/ENTER button to set the span adjustment for the

PID channel to the programmed value. Continue with Step 30.

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29 . If you are using a 5-gas calibration cylinder:

AUTO

PASS

SEN LIFE

WARNING

CO

4:07

VOC

ppm

100

POWER/ENTER
to acknowledge

CAL

CAL MODE

AIR CAL
AUTO CAL
SINGLE CAL
NORMAL MODE

AUTO

PASS

4:07

VOC

ppm

100

CAL

CAL MODE

AIR CAL
AUTO CAL
SINGLE CAL
NORMAL MODE

a. Since calibration gas has already been flowing to the PID sensor while the other

channels were being calibrated, the PID sensor reading should be stable and
ready for adjustment.

b. Press and release the POWER/ENTER button to set the span adjustment for the

PID channel to the programmed value. Continue with Step 30.

30 . If the PID channel passed calibration, and if SEN LIFE ALERT is set to ON, and if

a sensor is in a sensor life warning condition, the following screen sequence occurs.

The buzzer and LEDs activate in a double pulsing pattern in the sensor life warning
screen. Press and release POWER/ENTER to acknowledge the warning.

31 . If the PID channel passed calibration and if no sensors are in a sensor life warning

condition or if SEN LIFE ALERT is set to OFF (factory setting), the following
screen sequence occurs.

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32 . If the PID sensor cannot be adjusted to the proper value, a screen displays indicating

SENSOR

VOC

ppm

FAIL

SEN LIFE

WARNING

CO

AUTO

GAS SELECT

VOC 100 ppm

that the PID sensor failed to calibrate.

The buzzer and alarm LEDs activate in a double pulsing pattern. Press and release
the RESET button to reset the alarm and continue to the Gas Select Screen. Attempt
to calibrate the PID channel again. If the failure continues, investigate the cause. See
“Troubleshooting” on page 102.

If SEN LIFE ALERT is set to ON (factory setting is OFF) and if any sensor is in a
sensor life warning condition, the following screen appears. The buzzer and LEDs
activate in a double pulsing pattern. Press and release POWER/ENTER to
acknowledge the sensor life warning and continue to the Gas Select Screen.

The PID Gas Select Screen displays.

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Returning to Measuring Mode

CAL

CAL MODE

AIR CAL

AUTO CAL
SINGLE CAL

NORMAL MODE

1 . Disconnect the tubing from the probe.

2 . Unscrew the demand flow regulator from the calibration cylinder.

3 . For a passed calibration, the cursor will already be next to NORMAL MODE. Press

and release the POWER/ENTER button to return to Measuring Mode.

4 . For a failed calibration:

a. Use the SHIFT ▼ (PANIC) button to displays the Escape Gas Select Screen, then

press and release the POWER/ENTER button to return to the Auto Cal Menu.

b. Use the SHIFT ▼ (PANIC) button to move the cursor next to ESCAPE, then

press and release the POWER/ENTER button to return to the Calibration Mode
Menu.

c. Use the SHIFT ▼ (PANIC) button to place the cursor next to NORMAL

MODE, then press and release the POWER/ENTER button to return to
Measuring Mode.

Calibrating Using the Single Calibration Method

Single Calibration allows you to calibrate one channel at a time. This is useful if you only
want to calibrate one or two channels.

Setting the Fresh Air Reading

1 . While in the Calibration Mode Screen, move the cursor to the AIR CAL menu item

by using the SHIFT ▼ (PANIC) button.

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2 . Press and release the POWER/ENTER button. The Fresh Air Reading Screen will be

AIR

CH4 O2

%LEL %

H2S CO

ppm ppm

VOC

ppm

0 20.9

0.0 0

0

AIR

AIR CAL

HOLD AIR KEY

AIR

AIR CAL

HOLD AIR KEY

ADJUSTING ZERO

AIR

AIR CAL

RELEASE AIR KEY

ZERO ADJUSTED

displayed.

3 . If you suspect any low-level VOC background in the area, you will need to use the

VOC zero filter.

NOTE: If you have both a PID and a CO2 sensor installed, you will need to follow the

directions on pg.208 instead of following the directions shown below.

a. Remove the plug from each end of the VOC zero filter.

b. Attach the VOC zero filter to the inlet fitting or probe. The filter does not have a

c. Let the instrument draw through the VOC zero filter for 1 minute before

4 . To continue with the fresh air adjustment, press and hold the ▲AIR button.

If you do not want to continue, press and release the DISP/LOCK button and the unit
will return to the Calibration Mode Screen.

5 . The GX-6000 will indicate that it is adjusting the zero reading for a few seconds and

then it will prompt you to release the ▲AIR button.

preferred flow direction.

continuing.

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6 . Release the ▲AIR button. The fresh air adjustment will finish, the fresh air readings

AIR

AIR CAL

ZERO ADJUSTED

AIR

CH4 O2

%LEL %

H2S CO

ppm ppm

VOC

ppm

0 20.9

0.0 0

0

CAL

CAL MODE

AIR CAL
AUTO CAL

SINGLE CAL

NORMAL MODE

CAL

CAL MODE

AIR CAL

AUTO CAL
SINGLE CAL

NORMAL MODE

will be displayed momentarily, and then the instrument will return to the Calibration
Mode Screen.

7 . If the VOC zero filter was used, remove the filter from the GX-6000’s inlet fitting or

probe. Reinstall the plugs on each end of the filter.

Performing a Span Adjustment in Single Calibration

1 . Install the demand flow regulator onto the calibration cylinder.

2 . Connect the sample tubing to the demand flow regulator.

3 . Install the sample hose and probe on the GX-6000 inlet fitting. Make sure the probe’s

two halves are tightened firmly together to avoid leaks that can affect the calibration.
See Figure 22 on page 112 for an illustration of the internal parts of the probe.

4 . Move the cursor next to the SINGLE CAL menu item by using the ▲AIR or SHIFT

▼ (PANIC) button.

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5 . Press and release the POWER/ENTER button. The Select Sensor Screen appears.

SINGLE

SINGLE CAL

CH4
O2
H2S

CO

VOC

ESCAPE

SINGLE

GAS SELECT

Isobutylene
Acetone

ESCAPE

6 . Move the cursor next to the sensor you want to calibrate with the ▲AIR and SHIFT

▼ (PANIC) buttons. In the example above, the CH

adjustment.

If you do not want to proceed with the span adjustment, press and release the DISP/
LOCK button or place the cursor next to ESCAPE and press and release POWER/
ENTER to return to the Calibration Mode Screen.

To proceed with the calibration, continue with the next step.

sensor is selected for span

4

7 . For a CH4, O2, H2S, or CO channel continue to Step 10.

For a VOC channel, see Step 8 and Step 9 before continuing with Step 10.

8 . Press and release the POWER/ENTER button. The target gas selection screen will

display. This screen allows you to select the gas you want to use for calibration.
Isobutylene will always be displayed on the top line. The second line will show the
gas that is currently selected in the PID Gas Name Screen in Display Mode. In the
example below, acetone is the currently selected gas. If isobutylene is the selected
gas, then isobutylene will appear twice in this list.

9 . Use the ▲AIR and SHIFT ▼ (PANIC) buttons to move the cursor next to the gas you

want to use for calibration. Continue to Step 10.

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10 . Press and release the POWER/ENTER button to proceed to the Single Calibration

APPLYGAS

CH4

%LEL

0

SINGLE

PASS

SINGLE

SINGLE CAL

CH4
O2
H2S

CO

VOC
ESCAPE

SEN LIFE

WARNING

CH4

POWER/ENTER to acknowledge

Apply Gas Screen. APPLYGAS and the gas reading will be flashing.

The screen shown below is for the CH4 channel. If you are calibrating a different
channel, your screen will look slightly different.

11 . Connect the tubing from the demand flow regulator to the rigid tube on the probe.

Allow the GX-6000 to draw gas for one minute.

12 . If necessary, adjust the reading to match the cylinder concentration with the ▲AIR

and SHIFT ▼ (PANIC) buttons. If the reading cannot be adjusted to match the

cylinder concentration, see “Troubleshooting” on page 102.

13 . If SEN LIFE ALERT is set to ON, and if a sensor is in a sensor life warning

condition, the following screen sequence occurs.

The buzzer and LEDs activate in a double pulsing pattern in the sensor life warning
screen. Press and release POWER/ENTER to acknowledge the warning.

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14 . If no sensors are in a sensor life warning condition or if SEN LIFE ALERT is set to

SINGLE

PASS

SINGLE

SINGLE CAL

CH4
O2
H2S

CO

VOC
ESCAPE

SINGLE

SINGLE CAL

CH4
O2
H2S

CO

VOC

ESCAPE

OFF (factory setting), the following screen sequence occurs.

15 . Disconnect the tubing from the GX-6000’s probe.

16 . Repeat Step 6 through Step 15 for any other channels you want to calibrate. Make

sure you use an appropriate calibration cylinder for each sensor.

CAUTION: When calibrating the oxygen sensor, verify the concentration of oxygen

listed on the cylinder’s label. For oxygen-free samples (100% nitrogen for
example), set the oxygen calibration value to 0.0%.

17 . After the last channel is calibrated, disconnect the calibration tubing from the probe,

then unscrew the demand flow regulator from the calibration cylinder.

18 . With the Select Sensor Screen displayed, place the cursor next to ESCAPE using the

▲AIR or SHIFT ▼ (PANIC) button.

19 . Press and release the POWER/ENTER button to return to the Calibration Mode

Screen.

20 . Use the SHIFT ▼ (PANIC) button to place the cursor next to the NORMAL MODE

menu item, then press and release the POWER/ENTER button to return to
Measuring Mode.

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Performing a Bump Test

CAL

CAL MODE

AIR CAL

AUTO CAL

SINGLE CAL

BUMP TEST

NORMAL MODE

NOTE: The BUMP DISP menu item in Maintenance Mode is factory set to OFF. The

BUMP TEST menu item will not appear unless BUMP DISP is set to ON. See

pg.143 for instructions.

NOTE: The GX-6000 uses parameters defined in the BUMP PARAMETERS menu

item of Maintenance Mode while performing a bump test. To view or update
these parameters, see pg.144.

If the combustible gas channel is calibrated to a gas other than methane, use an appropriate
multigas cylinder.

1 . Install the demand flow regulator onto the calibration cylinder.

2 . Connect the sample tubing to the demand flow regulator.

3 . Install the sample hose and probe on the GX-6000 inlet fitting. Make sure the probe’s

two halves are tightened firmly together to avoid leaks that can affect the calibration.
See Figure 22 on page 112 for an illustration of the internal parts of the probe.

4 . While in Measuring Mode, press and hold the SHIFT ▼ (PANIC) button, then press

the DISP/LOCK button and release both buttons.

5 . If the unit prompts you for the password, enter it by using the ▲AIR and SHIFT ▼

(PANIC) buttons to select each password number and then pressing and releasing
POWER/ENTER to enter the number and move on to the next one.

NOTE: You will only be prompted to enter a password if the PAS SW OR D menu item

in User Mode is set to ON. See pg.100 for instructions to update the
PASS WO RD setting and to choose a password.

6 . The Calibration Mode Screen displays with the cursor next to AIR CAL.

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7 . Move the cursor next to the BUMP TEST menu item by using the SHIFT ▼

CAL

CAL MODE

AIR CAL

AUTO CAL

SINGLE CAL

BUMP TEST

NORMAL MODE

AUTO

GAS SELECT

CH4 50 %LEL

O2 12.0 %
H2S 25.0 ppm

CO 50 ppm

AUTO

GAS SELECT

VOC 100 ppm

AUTO

GAS SELECT

ESCAPE

▲ AIR or
SHIFT ▼ (PANIC)

▲ AIR or

SHIFT ▼ (PANIC)

▲ AIR or

SHIFT ▼ (PANIC)

(PANIC) button.

8 . Press and release the POWER/ENTER button. The first of the Gas Select Screens,

the standard four sensors screen, will be displayed. In addition to the standard four
sensors screen, there is a separate screen for each installed smart sensor, and an
ESCAPE screen that will take you back to the Calibration Mode menu. Use the

▲AIR and SHIFT ▼ (PANIC) buttons to display the gas(es) you want to test.

9 . Before proceeding, confirm that the bump test gas value(s) are the same as the

concentration(s) in the calibration cylinder. If they are not, adjust the bump test gas
value(s) be entering the AUTO CAL menu item in Calibration Mode, changing the
value(s) there, and reentering the BUMP TEST menu item.

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10 . With the desired sensor screen displayed, connect the tubing from the demand flow

30BUMP

CH4 O2

%LEL %

H2S CO

ppm ppm

0 20.9

0.0 0

BUMP

CH4 OK
O2 NG
H2S OK

CO NG

BUMP

CH4 O2

%LEL %

H2S CO

ppm ppm

50 19.0

25.0 13

▲ AIR or
SHIFT ▼ (PANIC)

regulator to the rigid tube on the probe then quickly press and release the POWER/
ENTER button to proceed to the Bump In Progress Screen. The instrument will
count down.

If you do not want to proceed with the bump test, press and release the DISP/LOCK
button to return to the Gas Select Screen.

If you do want to continue with the bump test, proceed to the next step.

11 . When AUTO CAL in the BUMP PARAMETERS menu item in Maintenance

Mode is set to OFF:

a. The instrument will indicate which channels passed or failed the bump test with

an OK (pass) or an NG (fail) to the right of the gas. You can scroll between the

bump test results and the bump test gas readings with the ▲AIR and SHIFT ▼

(PANIC) button.

b. If all channels passed: Press and release the POWER/ENTER button to return to

the Gas Select Screen. If START BUMP PASS is set to ON (factory setting) and
if your instrument is a 4-gas only, the instrument will automatically start the
warmup sequence.

c. If any channels failed: The buzzer will sound a double pulsing tone until you

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press and release the POWER/ENTER button to return to the Gas Select Screen.

See “Troubleshooting” on page 102 to investigate the cause of the failure and
replace the failed sensor(s) if necessary.

d. Disconnect the tubing from the probe.

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12 . When AUTO CAL in the BUMP PARAMETERS menu item in Maintenance

BUMP

CH4 OK

O2 OK
H2S OK
CO OK

BUMP

CH4 O2

%LEL %

H2S CO

ppm ppm

50 12.0

25.0 50

▲ AIR or
SHIFT ▼ (PANIC)

60CAL

CH4 O2

%LEL %

H2S CO

ppm ppm

49 19.0

23.0 32

Mode is set to ON:

If all channels pass the bump test:

a. The results screen appears. You can scroll between the bump test results and the

bump test gas readings with the ▲AIR and SHIFT ▼ (PANIC) buttons.

b. To return to the Gas Select Screen, press and release the POWER/ENTER button.

If START BUMP PASS is set to ON (factory setting) and if your instrument is a
4-gas only, the instrument will automatically start the warmup sequence.

c. Disconnect the tubing from the probe.

If any channel fails the bump test:

a. The instrument will beep and a calibration is immediately and automatically

started. Continue to apply the calibration gas. CAL will appear at the top of the
screen along with a countdown.

The calibration time counted down during a calibration initiated because of a
failed bump test is the difference between the gas time and the calibration time
defined in the BUMP SETTING menu item in Maintenance Mode.

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b. At the end of the calibration, the instrument displays the results from both the

BUMP

CH4 OK OK
O2 NG NG

H2S OK OK
CO NG OK

CAL

CH4 O2

%LEL %

H2S CO

ppm ppm

50 18.0

25.0 49

BUMP

CH4 O2

%LEL %

H2S CO

ppm ppm

49 19.0

23.0 32

▲ AIR or

▲ AIR or

▲ AIR or

SHIFT ▼ (PANIC)

SHIFT ▼ (PANIC)

SHIFT ▼ (PANIC)

bump test and the calibration. Use the ▲AIR and SHIFT ▼ (PANIC) button to

scroll between the calibration/bump test results, the bump test gas readings, and
the calibration gas readings.

c. To return to the Gas Select Screen, press and release the POWER/ENTER button

13 . Unscrew the demand flow regulator from the calibration cylinder.

14 . If you want to bump test any more channels, repeat Step 10 - Step 13.

15 . Use the SHIFT ▼ (PANIC) button to display the ESCAPE screen, then press and

16 . Use the SHIFT ▼ (PANIC) button to place the cursor next to the NORMAL MODE

at any time. If any channel failed the calibration, the buzzer will sound a double
pulsing tone until you press and release the POWER/ENTER button.

d. Disconnect the tubing from the probe.

release the POWER/ENTER button to return to the Calibration Mode Menu.

menu option, then press and release the POWER/ENTER button to return to
Measuring Mode.

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Chapter 6: User Mode

Overview

This section describes the GX-6000 in User Mode. See Table 12 below for a list of the
items found in User Mode, the page that the menu item’s instructions can be found on, and
a short description of the menu item.

Table 12: User Mode Menu Items

Menu Item (page number) Description

DATE (pg.96) Set the instrument’s date and time

DATE FORMAT (pg.96) Set the date format

CONFIGURE CH (pg.97) Change sensor/channel assignment

LANGUAGE (pg.99) Change the instrument’s language

ROM/SUM (pg.99) View the instrument’s ROM number and checksum

PASSWORD (pg.100) Turn the User Mode password function on or off and

update the password

START MEASURE (pg.101) Return to Measuring Mode

Tips for Using User Mode

• When in the main menu, the cursor (>) indicates which menu item will be selected if
the POWER/ENTER button is pressed and released.

•Use the SHIFT ▼ (PANIC) button to move the cursor down through the main menu

and submenu items, and to lower values or change the setting in a specific option.

•Use the ▲AIR button to move the cursor up through the main menu and submenu

items, and to raise values or change the setting in a specific option.

• Use the POWER/ENTER button to enter a selected menu item with the cursor next to
it and to enter and save settings during programming.

• An adjustable parameter that is flashing can be adjusted with the ▲AIR and SHIFT ▼

(PANIC) buttons.

• Press the DISP/LOCK button while in a screen where you are entering or updating
parameters to exit the screen without saving any changes.

Entering User Mode

WARNING: The GX-6000 is not in operation as a gas detector while in User Mode.

1 . Take the GX-6000 to a non-hazardous location and turn it off if it is on.

2 . Press and hold the ▲AIR and SHIFT ▼ (PANIC) buttons, then press and hold the

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POWER/ENTER button. When you hear a beep, release the buttons.

PASSWORD

MODE SELECT

USER MODE

MAINTENANCE

PASSWORD

INPUT

PASSWORD

0 0 0 0

PASSWORD set to OFF PASSWORD set to ON

MAINTE

USER

DATE
DATE FORMAT
CONFIGURE CH

LANGUAGE

ROM/SUM

PASSWORD
START MEASURE

3 . The screen that appears will depend on the setting of User Mode’s PASSWORD

item.

If PASSWO RD is set to OFF (factory setting), continue with Step 4.

If PASSWO RD is set to ON, continue with Step 6.

4 . If PASS WO RD has been set to OFF, the Mode Select screen will appear, prompting

you to choose the mode you’d like to enter.

5 . Use the ▲AIR and SHIFT ▼ (PANIC) buttons to put the cursor in front of USER

MODE and press and release the POWER/ENTER button. Continue to Step 8.

6 . If PA SSWORD has been set to ON in User Mode, a password screen will appear.

The first digit will be flashing.

7 . Enter the password by using the ▲AIR and SHIFT ▼ (PANIC) buttons to select each

password number and then pressing and releasing the POWER/ENTER button to
enter it and move on to the next number until all of the numbers are entered.
Continue to Step 8.

8 . The main menu displays. It has 7 menu items.

9 . Use the ▲AIR or SHIFT ▼ (PANIC) button to move the cursor up and down the

menu items.

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Setting the Date and Time

DATE

DATE

5/ 1/2015

MM/DD/YYYY

12:55

NOTE: The example screen shown below assumes a DATE FORMAT setting of MM/

DD/YYYY (factory setting). If your instrument’s DATE FORMAT is set to

something else, your screen will appear different.

1 . From the main menu, place the cursor next to DATE.

2 . Press and release POWER/ENTER. The date and time will be displayed with the

year flashing.

3 . Use ▲AIR or SHIFT ▼ (PANIC) to display the desired year.

4 . Press and release POWER/ENTER to save the setting. The month setting flashes.

5 . Repeat Step 3 and Step 4 to enter the month, day, hours, and minutes settings. The

main menu displays after you enter the seconds setting.

Setting the Date Format

The date can be displayed in three ways, MM/DD/YYYY (factory setting), DD/MM/
YYYY, or YYYY/MM/DD.

1 . From the main menu, place the cursor next to DATE FORMAT.

2 . Press and release POWER/ENTER. The Date Format screen appears with the current

setting flashing.

3 . Use ▲AIR or SHIFT ▼ (PANIC) to display the desired setting.

4 . Press and release POWER/ENTER to save the setting and return to the main menu.

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Configuring the Channels

USER

CONFIGURE CH

CH 1 : CH4 (HC )
CH 2 : O2 (OX )

CH 3 : H2S (H2S )

CH 4 : CO (CO )
CH 5 : VOC (SM1)
ESCAPE

USER

CHANNEL 1

CH4 (HC )
O2 (OX )

H2S (H2S )

CO (CO )
VOC (SM1)
ESCAPE

The CONFIGURE CH menu item allows you to rearrange the display order of the active
channels.

1 . From the main menu, place the cursor next to CONFIGURE CH.

2 . Press and release POWER/ENTER. The Configure Channels screen appears with the

cursor next to CH1.

3 . Use ▲AIR or SHIFT ▼ (PANIC) to move the cursor next to the channel you want to

configure.

4 . Press and release POWER/ENTER. The available configuration options are shown.

The current setting for the channel will be flashing.

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5 . Use ▲AIR and SHIFT ▼ (PANIC) to move the cursor next to the desired

USER

CHANNEL 1

CH4 (HC )
O2 (OX )

H2S (H2S )

CO (CO )
VOC (SM1)
ESCAPE

configuration for the selected channel. In the example below, the cursor has been
moved next to the H2S (H2S ) selection.

6 . Press and release POWER/ENTER to select the channel configuration.

NOTE: Each channel must have a gas assignment. If you change one channel’s gas to

something else, the two affected channels will end up swapping places. In the
example above, when you select H2S as channel 1’s new gas, CH4, which used

to be channel 1, would automatically be assigned to channel 3, H2S’ old
channel.

7 . Repeat Step 5 and Step 6 for any other channels you want to configure.

8 . Use SHIFT ▼ (PANIC) to move the cursor next to the ESCAPE menu item.

NOTE: If you want to exit to the main menu without saving any channel configuration

changes, press and release DISP/LOCK.

9 . Press and release POWER/ENTER to save the changes and return to the main menu.

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Updating the Language Setting

USER

LANGUAGE

ENGLISH
JAPANESE
ITALIAN
SPANISH

GERMAN

FRENCH

PORTUGUESE

RUSSIAN

ROM/SUM

ROM 05017

SUM 62C7

The LANGUAGE menu item allows you to select the language for the GX-6000’s user
interface. The available choices are English (factory setting), Japanese, Italian, Spanish,
German, French, Portuguese, Russian, and Korean.

1 . From the main menu, place the cursor next to LANGUAGE.

2 . Press and release POWER/ENTER. The Select Language Screen appears with the

cursor in front of the current language.

3 . Use ▲AIR or SHIFT ▼ (PANIC) to move the cursor in front of the desired language.

If you do not wish to select a new language, press and release DISP/LOCK. The unit
will return to the main menu.

4 . Press and release POWER/ENTER to save the new language setting and return to the

main menu. The GX-6000’s user interface will now be in the newly selected
language.

Viewing the ROM/SUM of the Instrument

The ROM/SUM screen shows the firmware version that is loaded in the instrument and
the firmware checksum.

1 . Use the ▲AIR or SHIFT ▼ (PANIC) button to place the cursor next to ROM/SUM.

2 . Press and release the POWER/ENTER button. The ROM and checksum values for

your unit will be displayed.

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3 . The first line displays the ROM number. The ROM number indicates the firmware

USER

USER PASSWORD

ON

USER

USER PASSWORD

INPUT

PASSWORD

0 0 0 0

version number. In the above example, the ROM number is 05017. The bottom line
displays the firmware file’s checksum, 62C7 in the above example.

4 . Press and release the POWER/ENTER button again to return to the main menu.

Turning the Password Function On or Off

ON: The GX-6000 prompts you for a password when you enter User Mode and
Calibration Mode.

OFF (factory setting): No password is required to enter User Mode or Calibration Mode.

1 . From the main menu, place the cursor in front of PA SSWORD.

2 . Press and release POWER/ENTER. The Password Protection Screen appears.

3 . Use ▲AIR or SHIFT ▼ (PANIC) to display the desired setting.

4 . If you selected OFF, press and release POWER/ENTER to save the setting and

return to the main menu.

If you selected ON, continue with Step 5.

5 . Press and release POWER/ENTER. The Set Password Screen appears. 0000 is at the

bottom of the screen with the first 0 flashing.

6 . Use ▲AIR or SHIFT ▼ (PANIC) to display a number from 0 to 9.

7 . Press and release POWER/ENTER to enter the selection and advance to the next

number.

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