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AUTO CAL FEATURE
AMETEK is pleased to introduce a new Auto Cal feature to the 5100HD.
This feature allows for the timer-actuated (automatic) validation or calibration
adjustment of the analyzer using span and/or zero gas standards. A manually-
actuated span/zero feature has been present in the 5100HD for some time, and a
detailed description of this feature may be found in chapter 4 (User Interface) of
this manual.
Feature Overview:
Auto Cal works in two basic ways: as a validation "check", or as a calibration span/
zero adjustment.
A validation (i.e. check or bump) consists of challenging the analyzer with a zero
gas, span gas, or both – and observing the difference between the applied gas
value(s) and the analyzer readings. It does not include any adjustment of either the
span or zero settings in the analyzer software. Therefore, the analyzer readings will
remain the same for a given gas after the validation event as they were before it.
A calibration span is very similar, in that the same zero and/or span gasses are
introduced into the analyzer. The difference is that the analyzer adjusts itself so that
the zero and/or span values in the software are changed. These changes result in the
analyzer readings matching more closely the actual standard gas concentration(s)
that were entered by the user. The analyzer readings, therefore, will be different
for a given gas after the calibration event than they were before it. Please note that
the span and zero adjustments only affect two points on the calibration curve for
the analyzer. A full, multi-point calibration is done on each analyzer by AMETEK
before the equipment leaves the factory, The span and zero changes performed later
in the field by the Auto Cal feature do not replace this original factory calibration –
they adjust it.
The Auto Cal feature operates on a timer principle. The user enters a time of day
that the Auto Cal event is to occur, as well as an interval. The analyzer will then
initiate an Auto Cal periodically, after each successive interval. For example, if the
user sets an Auto Cal time of 3:00 pm, and an interval of 24 hours, the analyzer will
perform the Auto Cal that day at 3pm (or the following day if the user performed
the setup after 3 pm), and everyday thereafter at 3pm.
Appendix A | A-1
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