Dac Test - Agilent Technologies 1100 Series Reference Manual

mAU
-27.6
-27.7
3
Troubleshooting and Test Functions
-27.8
-27.9
-28.1
counts
3475
3470
3465
3460
3455
counts
3510
3505
3500
3495
3490
4 Select Signal 2 - Raw Reference.
5 Observe the count readings for signal 1 and signal 2.
The displayed values should be less than 7900 counts.
The dark current signal can be displayed directly on the screen.
1 Select in VWD - Settings - Analog Output as Raw Sample or Raw Reference.
2 Press the Plot button and select the Analog signal in Setup.
3 Return to the Plot screen by pressing Done.

DAC Test

This test determines correct operation of the digital-analog converter (DAC).
The test applies an AC voltage (10 µV) to the DC output of the DAC. The DAC output
is connected to the analog output connector at the rear of the detector.
68 1100 Series Variable Wavelength Detector Reference Manual
VWD1 A, Wavelength=254 nm (DIAGNOSE\DGVWDDC.D)
-28
0 0 .2 0 .4 0 .6 0 .8 1 1 .2 1 .4 1 .6 1 .8 min
VW D1 E, U nfilter ed S amp le (D IAG NOS E\D GVW DD C.D)
0 0 .2 0 .4 0 .6 0 .8 1 1 .2 1 .4 1 .6 1 .8 min
VW D1 F, Un filter ed R efer ence (DI AGN OSE\ DG VWD DC. D)
0 0.2 0.4 0.6 0.8 1
1.8
1.2 1.4 1.6