Waters 2489, Обзор и руководство по обслуживанию

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June 11, 2015, 715004752 Rev. A
Page 64
3.2.5.2 Configuring event inputs (contact closures)
You use the CONFIGURE key to edit event input settings and specify switched output
settings.
Using the Enter key and the numeric keypad (or the
s
and
t
keys) to select the
appropriate entry, you can edit four fields on the second Configuration screen.
The default for Inject, Chart-mark, and Autozero is Low; the default for Lamp is
Ignore.
• Inject – You can specify the inject input to signal the start of a run. This event
resets the run-time clock and applies initial method conditions immediately:
–
High – Start run when contact closure changes from off (open) to on
(closed).
– Low – Start run when contact closure changes from on (closed) to off
(open).
– Ignore – Do not respond to inject-start input.
• Chart-mark – You can specify the chart-mark input to create a chart-mark on
channel A, channel B, or both. You determine the response of the channel using
the enable chart-mark function explained in the table on page 61 and shown in
the figure on page 60 .
– High – Create chart-mark(s) when contact closure changes from Off (open)
to On (closed).
– Low – Create chart-mark(s) when contact closure changes from On (closed)
to Off (open).
– Ignore – Do not respond to chart-mark input.
• Autozero – You can configure the autozero input to autozero absorbance
readings on channel A, channel B, or both. You determine the response of the
channel using the enable autozero function explained in the table on page 61
and shown in the figure on page 60 .
– High – Autozero the channel when contact closure changes from Off (open)
to On (closed).
– Low – Autozero the channel when contact closure changes from On (closed)
to Off (open).
– Ignore – Do not respond to autozero input.
• Lamp – You can configure the lamp input level to turn the deuterium lamp on or
off from an external device as follows:
–
High – Turn lamp off when contact closure is On (closed).
– Low – Turn lamp off when contact closure is Off (open).
– Ignore – Do not respond to Lamp input.