F-900 Instruction Manual 8/14/2017
1554 NE 3
rd
Ave, Camas, WA 98607, USA Phone: (360) 833-8835
14
www.felixinstruments.com
Measure Menu: Taking a Measurement
To begin taking measurements, select the Measure menu option by
pressing the right arrow
when Measure is highlighted on the main menu display. Make sure the IN and OUT ports on the
front panel of the instrument are clear from any obstructions. Create and open a file before
starting a measurement, otherwise the default filename on the SD card is File01.
If sampling ambient air, turn the unit on and leave the front ports free of obstruction. If sampling
a container or pallet, connect the Viton tubing to the IN port and place the end of the tubing into
the container or pallet to be sampled. If using the F-900RK, place the fruit to be sampled in the
fruit chamber, and connect it to the IN port on the unit. It is up to the specific setup whether the
OUT tubing is connected to the OUT port with Chamber Out filled with potassium permanganate
(KMnO
4
) and set to “on”. If left disconnected from the OUT port, the fruit chamber is allowed to
replenish with ambient air.
Sensor Stability
The F-900 will begin to warm-up. The F-900 will display the
“Sensor Stability” screen after
pressing the RIGHT arrow to get into the Measure Menu. The display will show the file that is
open and the flow of gas being pumped through the instrument. Below this will be whether the
initialization is automatic or manual.
If the initialization is automatic, the F-900 will precede
directly to the measurement (Graph Mode) once the sensors have stabilized
. If the
initialization is manual, Monitor Mode will not be triggered until the user presses the right arrow
to enter Monitor Mode.
Press the down arrow key to switch between automatic and manual initialization.
Press the right arrow to skip the Sensor Stability screen and proceed to the Graph Mode
display.
If the
offset auto-correction
feature is enabled, then the unit will run the set zero process
automatically every 24 hours (or at the user defined time interval). The offset auto-correction
utilizes Chamber Out, which should be left full of KMnO
4
even if Chamber Out is set to “off”
during normal measurements. For more details on the offset auto-correction, see page 35.
Note:
The F-900 ethylene analyzer sensors should be given 24 hours to stabilize after being on
an airplane. Start a measurement and enable the Closed Loop (On). Then, allow the instrument
to measure for 24 hours while connected to a power supply.
Graph Mode
Graph Mode will be entered automatically once the unit has stabilized in Sensor Stability mode.
This view graphically displays the measured C
2
H
4
value over time. To switch Graph Mode into
Monitor Mode, press the right arrow.
To exit the measurement, press Stop.
Summary of Contents for F-900
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