8
AIYI Technologies
1 Task bar
Zero
calibration
Span
calibration
Self
-
test
USB
connection
Power
2
Status bar
Gas detected, eg:
Ex O2 CO H2S
STEL
Short term exposure limit
TWA
Time weighted average
Low alarm
High alarm
3
Readings bar
Display the current gas concentration
5
Time bar
Display current time
4
Unit bar
%LEL
lower explosive limit
ppm
Parts per million
%
Percentage
μ
mol/mol
One millionth mol gas per
mol air
note
：
1ppm = 1
μ
mol/mol
