F-940 Instruction Manual rev. 3-8-2017
1554 NE 3
rd
Ave, Camas, WA 98607, USA
15
Phone: (360) 833-8835
[email protected]
www.felixinstruments.com
Next, verify the set zero calibration for all sensors by measuring
ambient air. Run the set zero calibration again if the verification
is not successful.
Setup > Calibration
The calibration feature allows the user to set zero and set span
without the use of a computer or G.A.S. (Gas Analysis Software).
Unlike Setup > Set Zero in the next section, a zero standard gas
is required as well as standard gases for the set span process.
The F-940 Store It! Will prompt the user to set up a zero gas,
which can be achieved by feeding 100% Nitrogen (N2) gas to the
intake. The unit will countdown to set zero. The following
screen will prompt the user to setup a span gas, which is a
known standard gas used for the span calibration process. For
more information on standard gases used for calibrating the
Store It! Refer
to the calibration section in the ‘Maintenance of
your F-940 Store It!
’ section.
Setup > O2 Calibration in Air
Alternative to setting zero for the oxygen sensor weekly with
100% N2 gas, a user can use the O2 calibration in air menu
option to calibrate the O2 sensor using ambient air.
Right arrow on this menu option to begin the calibration. The
display will read, ‘Use fresh air (20.9%) Please wait…’. The F
-940
will beep upon completion of the O2 calibration in air.
Setup > Date and Time
To adjust the date and time, use the Right and Left arrows to
move between Month/Day/Year and Hour/Minute/Second and
use the Up and Down arrows to change the values. To exit, use
