Warm Up Of The Detector - Agilent Technologies InfinityLab LC Series User Manual

5 Optimizing the Detector

Warm up of the Detector

Warm up of the Detector

Give the optical unit enough time to warm-up and stabilize (> 60 minutes). The
detector is temperature controlled. After turn-on of the detector, it goes through a
cycle of different states:
•
•
•
•
This cycle starts
•
•
to ensure that the temperature control operates in a defined control range.
The times to stabilize the baseline may vary from instrument to instrument and
NOT E
depends on the environment. The example below was done under stable
environmental conditions.
The figures below show the first two hours of a detector warm-up phase. The
lamp was turned on immediately after turn on of the detector.
Agilent InfinityLab LC Series Diode Array Detectors User Manual
0 to 0.5 minutes the heater control is OFF and the heater element runs at 0 %
duty cycle.
0.5 to 1 minutes the heater control is OFF and the heater element runs at 66%
duty cycle. This first minute is used as self-test of the heater functionality.
1 to 30 minutes the heater control is OFF and the heater element runs at 40%
duty cycle.
After 30 minutes the heater control is ON and is working with optimized
parameters to get the optical unit into the optimal temperature window
stabilized.
when the detector is turned off/on
when the lamp is turned off/on
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