D/A Converter (Dac) Test - Agilent Technologies 1290 Infinity II User Manual

8
Test Functions

D/A Converter (DAC) Test

D/A Converter (DAC) Test

The detector provides analog output of chromatographic signals for use
with integrators, chart recorders or data systems. The analog signal is
converted from the digital format by the digital- analog- converter (DAC).
The DAC test is used to verify correct operation of the
digital- analog- converter by applying a digital test signal to the DAC.
The DAC outputs an analog signal of approximately 50 mV (if the zero
offset of the analog output is set to the default value of 5 %) which can be
plotted on an integrator. A continuous square wave with an amplitude of
10 µV and a frequency of approximately 1 cycle/24 seconds is applied to
the signal.
The amplitude of the square wave and the peak- to- peak noise are used to
evaluate the DAC test.
When If the analog detector signal is noisy or missing.
Preparations Lamp must be on for at least 10 minutes. Connect integrator, chart recorder or data system to the
detector analog output.
112 Agilent 1290 Infinity II VWD User Manual