Data Logging; Warnings And Faults; Figure 31 System Alarm - Michell Instruments Optidew User Manual

Optidew User's Manual
If external sensors are used to generate the inputs, then the sensors should be positioned
with so that they are making a measurement representative of the environment seen by the
dew-point sensor.

4.4.6. Data Logging

The data logging function allows all of the measured parameters to be logged at a user specified
interval on the supplied SD card via the SD card slot on the base or side of the instrument. The
filename for each log file is generated automatically from the instrument date and time.
Log files are saved in CSV (comma separated value) format. This allows them to be imported
easily into Excel or other programs for charting and trend analysis. To set-up data logging
refer to Section 3.2.

5. WARNINGS AND FAULTS

The Optidew contains a comprehensive self-diagnosis system to alert the user whenever there is
an issue which could affect the measurement. These alerts are divided into two categories:
Warnings – A problem which is not currently affecting the measurement but requires attention.
Faults – A problem which requires immediate attention. Whenever a fault is triggered, the
Optidew will switch to 'Standby' and remain in this mode until the operator intervenes.
When a Fault is present, the System Alarm symbol will appear over the sensor status display on
the main screen. Pressing the System Alarm symbol will display all current faults and warnings.
At any other time, active warnings can be viewed by pressing the right-hand side of the sensor
status display. A system fault will usually be accompanied by one or more warnings, which
describe the problem in more detail.
Once a fault has been resolved, it is necessary to run a DCC cycle to return the t
to normal operation.

Figure 31 System alarm

For more information on fault codes, please see the next page.
42 97551 Issue 4.1, October 2019