TIGER
LT
MANUAL Ion Science Ltd
Page 32 of 41
Maintenance
Calibration
Ion Science Ltd recommends an annual service and calibration for users who require a traceable calibration.
During this service the lamp and detector are brought back to factory specifications and new Factory
Calibration data is stored.
Due to the linear output of the Ion Science PID detector, a two-point calibration is often adequate. TIGER
LT
scales its linear output across a ZERO level (clean air reference) and the SPAN 1 user defined gas
concentration.
TIGER
LT
offers the options of Factory Calibration or Custom Calibration. ‘Factory Calibration' is set by Ion
Science Ltd during instrument manufacture or on re-calibration. 'Custom Calibration' can be set by the
instrument user.
For Factory Calibration contact Ion Science Ltd or your distributor.
'Factory Calibration’ offers a safe set of three-point calibration data. This should be used if the custom
calibration fails and will keep the unit working until a good custom calibration is completed.
For Custom Calibration, first set up the parameters in TIGER
LT
PC - see the ‘TIGER
LT
PC Software’ section of the manual.
TIGER
LT
allows you to custom calibrate using any gas concentration from 10ppm. A cylinder of the selected
gas at each of the chosen concentrations is required. Demand flow regulators are recommended for the
Tiger
LT
. If flow regulators are to be used then a 0.3L/min is recommended, a flow adaptor should be used to
avoid over-pressurising the instrument (sold separately).
Have the cylinder(s) of gas, regulator(s) and the zero carbon filter (included in the Calibration Kit (A-861418)
for your TIGER
LT
) ready before starting the procedure. Alternatively a known clean air supply may be used
as the ‘zero’ gas. Please ensure you are familiar with the entire calibration procedure before attempting to
calibrate your TIGER
LT
.
Note: The calibration of your TIGER
LT
must be carried out in a clean air environment. Ensure all parts of
the Calibration Kit are available and ready for use.
Never calibrate the zero with the span gas connected.
Press the Options soft key on your TIGER
LT
to access the adjustable features.
Then use the Up or Down key to select calibration. Press Enter to confirm selection.
Select Custom Calibration and press Enter to confirm.
On confirming the selection, the user is presented with a 15 second count down.
Remove both caps from the Carbon Filter Assembly (A-31057) and then fit onto the probe of your TIGER
LT
.
Press Enter to start the ‘zero’ countdown. At the end of the count down a tick 'ü' will appear, indicating that
the Zero has been accepted. Disconnect the Carbon Filter Assembly and replace the cap ends. The useful
life of the Carbon Filter Assembly will be shortened if the Carbon Filter Assembly is open to atmosphere for
prolonged periods.
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