9
BA314001-en
4 Operation
4.1 Warm
up
To prepare the instrument for testing, connect a
regulated 12V DC supply its connector on the rear
panel and turn on the power to switch. Alternatively the
instrument may be operated from the integral
rechargeable battery.
As well as identifying the instrument and its software
version, it also provides a warm-up count from 600
down to zero seconds (duration 10 minutes) before
automatically switching to normal operating mode with
on-screen display of current concentration.
If desired, the warm-up screen can be exited and the
analyzer put into normal operating mode by simply
pressing the red "Enter" push button switch on the front
panel and holding it down for around two seconds.
During the warm-up process the zero may be slowly drifting. Ensure that the zero is reset
immediately prior to commencement of test measurements.
4.2 Auto-Zero
Adjust
After the initial warmup period, the instrument initiates
an auto-zero routine, prompting the operator to ensure
that the sample probe is located in relatively clean air
(for instance, not directly downstream from the exhaust
of an operating engine).
When this has been done, press the red
ENTER
button
and hold down for at least two seconds. A screen
prompt will tell you when to release the button. In
approximately 5 seconds the auto-zero will be
completed and the screen will change to “test
selection”
