Warm Up Of The Detector - Agilent Technologies 1200 Infinity Series User Manual

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:
• 0 to 0.5 minutes the heater control is OFF and the heater element runs at
• 0.5 to 1 minutes the heater control is OFF and the heater element runs at
• 1 to 30 minutes the heater control is OFF and the heater element runs at
• After 30 minutes the heater control is ON and is working with optimized
This cycle starts
• when the detector is turned off/on
• when the lamp is turned off/on
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 depends on
N O T E
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 1200 Infinity Series DAD User Manual
0 % duty cycle.
66% duty cycle. This first minute is used as self-test of the heater
functionality.
40% duty cycle.
parameters to get the optical unit into the optimal temperature window
stabilized.
Optimizing the Detector

Warm up of the Detector

5
107