Fir 1, 2, 3 & 5000
Ion Science Lt d
Ion Science L td
Page 14 of 53
Instrument Displays
_____
DISPLAY/FUNCTION Selection Screen
The DISPLAY/FUNCTION selection screen is shown when the Fir is first switched on, and can
always be located by repeatedly pressing the 'Esc' (Escape) key. The DISPLAY/FUNCTION screen allows the
user to view gas levels in a variety of ways and also allows access to the Function menu where settings can
be adjusted. Use the UP and DOWN keys to highlight the preferred option and then press the ENTER key.
Also see Page 10 'Instrument Functions'
Instrument Symbols Explained
Fir uses a variation of symbols that indicate the instrument’s status.
Bump test
FirstCheck can prompt the user to bump test the instrument on a weekly basis. If selected (via 1stPC) the
above symbol appears on a weekly basis, pressing the ENTER key clears the symbol until the following
week.
Battery Status
Battery status indicator can be accessed by pressing and holding ENTER on the graph and the large number
screens.
Peak Hold
Peak Hold is a numerical measurement that indicates the peak or maximum reading of that selected gas
sensor and is displayed to the right of the above symbol. The 'Peak' reading can be reset by pressing and
holding the ENTER key for 5 seconds
.
Graph Screen
Large Number
Screen
Large Number
Screen
Charged
Discharged
Function menu
