User's Manual

G7 TECHNICAL USER MANUAL || 17
CALIBRATION
What is calibration?
Gas sensors periodically need to be calibrated by applying a known concentration of
gas for a set amount of time. This procedure ensures the gas sensor can accurately
detect gas levels throughout its operating life. The calibration schedule depends on
your company’s safety policy. Blackline recommends not exceeding 180 days without
a calibration.
How do I calibrate?
1. Attach tubing to the calibration cap
2. Ensure the other end of the tubing is attached to a xed ow regulator on the gas tank
3. On your G7, press the OK button to enter the main menu
4. Use the arrow buttons to navigate to gas options, press OK
5. Use the arrow buttons to navigate to calibration, press OK
6. Press the up arrow to continue
7. G7 performs an automatic audio and visual assessment to test vibration and lights
8. You can individually choose which sensors to test. By default, G7 will test all sensors.
9. Attach the calibration cap to your device
10. G7 will begin to count down from 60. Apply the gas within this time window and
continue to apply gas for 2 minutes.
11. Turn gas o when prompted on your G7 screen
12. Press the OK button to complete calibration
13. G7 will let you know if the calibration has passed or failed, and when your next
calibration is due
14. Remove the calibration cap and let your G7 sit until the readings stabilize and your
G7 is calibrated
NOTE: If you see a calibration fail message on your LCD screen, try the calibration again. If
the error persists, please contact our Customer Care team.