Ionics Instruments 2004 Page 10-1 DLM 30007-08 Rev. A
10 TROUBLESHOOTING
Checking the Error Stack
The first step in troubleshooting for erratic readings, poor reproducibility
(> 3%), or other problems is to check the error stack to determine if any
malfunctions have been detected. If the front-panel display is not illuminated
and the analyzer is plugged in, proceed directly to the next section to check
the main fuse. Otherwise, follow the procedure outlined below to review the
error stack.
NOTE
For instrument firmware with the DataGuard feature, enter an Operator-level
(or higher) password when prompted to view the error stack. A Maintenance-
level (or higher) password is required for performing most diagnostic tests; a
QA-level (or higher) password is required for performing the 4-20mA test.
Check with your system administrator for an appropriate password. See the
DataGuard Operation chapter for more information regarding the DataGuard
feature.
An internal microprocessor monitors the analyzer's operation. If a problem is
detected, an error or warning is displayed and recorded in the error stack.
Look at the error stack in two ways:
If the analyzer is operating and the TOC Measurement Display is shown:
1. Press ENTER to switch to the RUNTIME menu.
2. Scroll to STOP TOC and press ENTER.
3. Scroll to ERRORS and press ENTER.
If the analyzer is not operating, and the MAIN menu is displayed, scroll
to ERRORS and press ENTER.
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