E C O P H Y S I C S Operating Guide
CLD 780 TR / July 2000 54
5.2.2.5 (25) “Stand-by“-window
The analyzer can be manually set to the “Stand-by“ mode from this win-
dow, and error and warning messages can be called up by pressing
“SYS“ key. The analyzer automatically enters this mode following certain
fault conditions.
1. “Stand-by“: The CLD 780 TR is forced into a “holding“ mode. In this
mode the ozone generators are turned off, but operating temperature
of the different components are maintained (see paragraph 5.3.2).
– “YES“: activates “Stand-by“ state (window (26) appears).
– “MEAS“: returns system to the measurement function; any error
messages are now erased.
2. Error and warning codes and accompanying messages:
All error messages are indicated by a repetitive warning tone. Serious
problems indicated by E-01 to E-05 are indicated by longer tones and
the other less critical errors (E-10 and above) by shorter signals. Errors
and warnings are indicated the appearance of a code (e.g. E-10, W-
02) at the lower right of the display. These codes appear regardless of
which window is currently active. If the instrument is placed in “Stand-
by“ mode after an error or warning code appears, the nature of the
problem is explicitly spelled out by a short text message. Alternatively
the operator can look up the meaning of an error code in chapter 10.
Handling of error messages and warning codes:
Error messages and warning codes are displayed in order of priority.
Error messages have higher priority than warning codes (e.g. E-05 has
priority over W-01). Priority follows the numbering system (e.g. E-01
has a higher priority than E-10). The same principle applies to the
warnings.
Return with “MEAS“.
Caution: Error messages and warnings must be erased by pushing the
“SYS“ and “MEAS“ keys after the problem has been solved. If there is
a second error with lower priority, only the first one is indicated until it
is remedied and its error display is erased. Only then will the second,
lower priority error code appear.
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