P 1, 2, 3 & 5000 Ex Ion Science Ltd
Page 22 of 52
Instrument Menu
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Calibration (continued)
Custom calibration
When 'Custom Calibration' is selected a 'Zero' and 'Span' can be set by the user. This allows the user to
calibrate the P PID to an alternative gas (other than Isobutylene). Ion Science provide a
Calibration kit accessory (Part number A-845213) which is recommended for use with P, however
other gases specific to your needs can also be used.
If performing a custom calibration using the Ion Science Calibration Kit accessory you will need you use the
Cal Adaptor supplied with your P in the Cal Kit sample box. WARNING: when fitting the Cal
adaptor onto the gas tube (part of the Calibration kit) ensure that the small breather hole of the Cal adaptor
is not covered as this will cause the instruments internal pump to be damaged beyond repair. Failure to
adhere to this warning will invalidate your warranty should your instrument pump become damaged.
In order to carry out a custom calibration the appropriate parameters need to first be set via the P
Ion PC software and downloaded to the instrument. Please see the P software calibration section
(pg 30) for details on how this can be achieved. Once these parameters have been set a custom calibration
can be completed, please see the recommended procedure below.
Ion Science suggests Custom calibrating when detection in ppb is required or when high accuracy is needed
for a specific gas other than Isobutylene.
Custom Calibration Procedure
Please read ALL of this procedure before attempting a custom calibration and ensure this procedure is
carried out in a clean air environment. Steps 2-4 should only be carried out by an experienced service
engineer. If you are not in a clean environment or not confident removing the lamp please move straight
from point 1 to point 5.
The ‘lamp’ calibration is only really necessary if the instrument is to be used for ppb applications.
1. Select Custom Calibration procedure – a tick '
ü
' will appear to confirm the
selection. Pressing Enter allows the user to enter the Custom calibration
menu.
2. Select the flashing ‘LAMP’ by pressing Enter.
3. The screen will then show the image to the right with a flashing number and
a lamp with an arrow. This is asking you to remove the instruments lamp then
select Enter. The flashing number will then count down once complete the delay
symbol will appear briefly before a tick symbol to show that the test has been
completed successfully.
