Fir 1, 2, 3 & 5000
Ion Science Lt d
Ion Science L td
Page 9 of 53
Getting started
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Setting alarm levels
Ion Science Ltd recommends that alarm levels are set to user specifications before the instrument is used
(see page 17 for details of how to set alarm levels.)
Setting date and time
Ion Science Ltd recommends that the correct local date and time be set to the instrument as soon as
possible before using for the first time (see page 32 for details on how to set the date and time.)
Selecting a gas from the inte rnal gas table
The Factory calibration is carried out on Fir just before leaving Ion Science.
Isobutylene gas is used to calibrate the PID sensor and Methane gas for the LEL sensor. Many other VOC
and LEL gases can be selected from the instruments internal gas table, but 'TVOC' gas is the default on the
PID sensor (TVOC has the same response factor as Isobutylene so 100ppm TVOC = 100ppm Isobutylene)
and 'Methane' gas is the default for the LEL sensor. Selecting alternative gases from the internal gas table
automatically selects alternative response factors allowing the correct concentration.* (To change the
selected gas please see pages 21 & 22.)
* Both PID and LEL sensors can detect a wide range gases however neither of these sensors are selective.
WARNING: Fir can not identify specific VOC or LEL gases!
Rechargeable Batteries
Fir instruments leave the factory fully charged, however the batteries reach full storage capacity
after a few charge / discharge cycles. A fully charged battery pack can completely discharge if left in
storage for a prolonged period. The rate at which the batteries self discharge directly relate to the ambient
temperature; the higher the ambient temperature, the quicker they discharge. Ion Science Ltd recommends
charging the instrument for 12 hours before use (see the battery section of this manual, page 36.)
Non Rechargeable Batteries (Alkaline)
Fit the battery pack supplied with the Fir. For more information please see the battery section of
this manual page 36.
A removable rechargeable battery pack (part number: A-820219), is also available which offers the flexibility
to use both Alkaline and NiMH cells.
