P 1, 2, 3 & 5000 Ex Ion Science Ltd
Page 21 of 52
Instrument Menu
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Alarm (Continued)
Either via the instrument or the P software. However additional entries can be entered into the
gas table via the P software with their own STEL and TWA values see page 31 for more
information.
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Sound (1, 2, 3 & 5)
Audible outputs can be selected to indicate
functions. When Signal is selected, the rate at
which the instrument 'Beeps' increases with the detected gas. When Confidence is selected the instrument
'Beeps' every 15 seconds to indicate it is functioning. This feature can be useful if the instrument is out of
sight. When Key is selected the instrument 'Beeps' when a key on the keypad is pressed. Alarm can only be
adjusted using the IonPC software to avoid the accidental switch off.
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Calibration (1, 2, 3 & 5)
'Factory calibration' is set by Ion Science during
instrument manufacture. 'Custom calibration' can be
set by the instrument user.
General description
Due to the linear output of the Ion Science PID detector cell, P instruments only require a two-
point calibration. The P scales its linear output across a 'Zero' level (clean air reference) and the
'Span' (a user defined gas concentration).
Factory Calibration
When 'Factory' calibration is selected the P will measure according to the factory set fixed points
and display the selected signal reading according to this reference.
'Factory' calibration offers a constantly repeatable reference, however prolonged use may mean these
reference points become less accurate. It is recommended that the P be returned to Ion Science
once a year for an annual calibration and service.
Factory
Custom
Signal Confidence Key Alarm
