3-3
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3.1.2 Checking Power-On Diagnostics
When you power-on the CHDF 2000, the system automatically executes a set of diagnostics to verify that
the system is ready for operation. The results of the power-on diagnostics appear in the Power-On
Diagnostics screen (Figure 3-2).
Figure 3-2 Power-On Diagnostics Screen
Table 3-1 identifies and describes the functions of the four power-on diagnostic tests.
Table 3-1 Power-On Diagnostic Tests
Name
Function
EPROM Checksum Performs a checksum test of program
memory (erasable programmable read-
only memory).
RAM Test
Tests the validity of programmed method
data saved in RAM (random access
memory).
Cartridge Heater
Determines if an optional cartridge heater
is installed.
Calibrate UV
Performs calibration and check of the
absorbance detector optics. This test
takes 2 to 3 minutes to complete.
If your CHDF 2000 fails any of the power-on diagnostics, refer to Chapter 5, Diagnostics, for
troubleshooting information.
3.1.3 Checking the Control Panel Display
When you first power-on the CHDF 2000, check the control panel display for readability. If
necessary, adjust the brightness and contrast of the control panel display, as described in Section
6.5, Adjusting the Control Panel Display.
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