Waters 2414, Overview And Maintenance Manual

Page: 102 / 130

June 11, 2015, 715004754 Rev. A
Page 102
7.2.4.2 Test keypad diagnostic test
To run the test keypad test:
1. From the Display & keypad choice list, press 1, Test keypad.
Result:
A bitmap representation of the keypad appears.
Figure 7–7: Test Keypad diagnostic screen
2. Press any key to begin the test, and then press each key until you have pressed
all of them.
Result:
When the keypad is operating properly, each key location is filled in
and then cleared with another press of the key. If any key does not respond
when pressed, contact your Waters service representative.
Requirement:
Press Enter twice to exit the keypad diagnostic.
7.2.5 Using the Other diagnostic functions
The Other diagnostics menu provides four additional diagnostic functions:
• Autozero offsets – Displays the autozero offset.
• Oven/Column Heater – Displays the internal oven and, if any, the column heater
status.
• Simulate peak – Specifies the generation of test peaks to calibrate your
integrator or data system.
• Valve – Monitors the status of the event inputs and single event output switch.
To access these diagnostic functions, press DIAG 5, Other diagnostics.
7.2.5.1 Display Autozero Offset
From the Other diagnostics choice list, press 1, Autozero offsets.
Note:
You can also use this diagnostic function to display and reset the autozero
offset, in both 410 or RIU modes, to zero by pressing Cancel (Shift 0).
7.2.5.2 Oven/column heater
From the Other diagnostics choice list, press 2, Oven/column heater.
Note:
You can also use this diagnostic function to display the internal oven and
external column heater (if configured) status. The heater icon flashes to indicate that
the internal oven is enabled. The % Duty indicates whether the oven is still working to
attain the temperature set point (an elevated value) or has reached equilibrium (a