User's Manual
G7 TECHNICAL USER MANUAL || 19
ZERO SENSORS
What is zeroing?
If G7 is not reading zero and you know you are in an atmosphere with no gas, your gas
sensor readings may have shifted. If this happens, it is best to calibrate your sensors. If
you are unable to preform a calibration, you can zero your sensors to reset the baseline.
G7 can be congured to automatically or manually zero on start-up when you turn on
your device from the conguration prole in Blackline Live.
NOTE: The baseline reading for oxygen is 20.9.
How do I zero sensors?
1. On your G7, press the OK button to open the main menu
2. Press the arrow buttons to navigate to gas options, press OK
3. Use the arrow buttons to navigate to zero sensors, press OK
4. Press the up arrow to begin zeroing. Do not apply any gas.
5. The LCD screen will let you know once zero is complete
NOTE: If you see a zero incomplete message on your LCD screen you may be in an
environment with gas levels, or your cartridge may need replacement.
PID TARGET GASES
What are target gases?
Photoionization (PID) sensors can be used to detect a large range of gases. A target
gas refers to the specific gas you are using trying to detect. G7’s readings will be
adjusted based on the target gas it is configured to detect.
How do I set G7’s target gas?
G7’s PID sensor’s target gas is set from the configuration profile in Blackline Live.
Under the photoionization detector section of the gas sensor settings card, you can
choose an existing target gas or set a custom target gas.
Where do I see which target gas G7 is detecting?
The target gas G7 is configured to use can be seen in two places:
On startup
In the gas options menu, under gas info > VOC target
In both of these places, G7’s screen will display the target gases name, as well as its
correction factor.