June 11, 2015, 715004752 Rev. A
Page 48
After it displays the Startup Diagnostics screen, the detector displays the following
series of messages in sequence—a process that takes about five minutes:
•
Initializing grating
•
Initializing system
•
Lighting lamp
•
Warmup time left:
n
minutes
•
Homing optical filter
•
Searching for 656 nm
•
Optimizing system performance
•
Finding calibration peaks
•
Restoring last setup
•
Completing initialization
When initialization ends, the detector displays the absorbance screen shown (see
). The sections
and
provide more information on this and subsequent screens.
Tip:
For normal use, allow the detector to warm up for at least 30 minutes before
operating.
3.1.1 Diagnostic test failure
If one or more of the internal startup diagnostic tests show a failing result, the
detector beeps and displays an error message. For serious errors, it displays the word
“Error”, in brackets (<Error>), in place of the run-time absorbance on the absorbance
screen.
for a list of startup diagnostic test failures, error messages, and
recommended recovery actions. See
for hardware-related causes of startup
diagnostic test failure and corrective actions.
3.1.2 Idle mode
When the detector is successfully started, it defaults to idle mode (see the
“2489 UV/Vis detector idle mode screen” on page 48
). When it is not performing any
function requiring the shutter to be open (local methods, scans, noise test, and so
on), the shutter is closed, and the detector remains in idle mode with the lamp lit. The
Closed Shutter limits unnecessary UV light from reaching the detector’s optics bench.
Figure 3–2:
2489 UV/Vis detector idle mode screen
Summary of Contents for 2489
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