Operation
MicroVol-1100 User manual 1.6
The MicroVol-1100 includes an input connector for wind speed and direction.
These inputs are averaged and stored in the unit, and may be used as triggers
for conditional sampling (eg. sampling when the wind direction is within a
specified range). The MicroVol also incorporates a time clock and
programmable timer enabling multiple time based sampling programs to be
configured.
3.1.1 MicroVol Sampling Protocol
The MicroVol uses a number of logical (conditional) parameters to decide
when it should switch the sample pump on.
The pump will be energised when all conditional parameters are satisfied. The
conditional parameters can be summarised as follows:
•
Is the current date after the specified Start Date and Time?
•
Is the current date before the specified End Date and Time?
•
Is the current time within one of the programmed Daily
sampling times? (Between any of the 6 programmable On Time
/ Off Time periods)
•
Is the current Day Of Week a specified sampling day?
•
Is the wind speed and direction sensor data within the
programmed range?
•
Is the power supply voltage above the lower limit (typically
11V)?
If all of the conditional parameters are satisfied (All ‘YES’ values
displayed in the Status Menu), then the MicroVol sample pump will
operate, and a sample will be collected on the filter paper.
In order to make the MicroVol pump operate continuously, it is possible to set
the MicroVol with parameter values that ensure all conditions are satisfied for
long periods of time. The only exception is that of the Power supply voltage,
which should always be maintained at above 11VDC. To set the MicroVol-
1100 to run continuously, enter the Setup menu:
Select Setup menu, then Times menu:
•
Select Start Date: Enter a date that is before the current date.
Example:
Set the Start Date as yesterdays date or earlier.
•
Select End Date: Enter a date in the distant future.
Example:
Set the End Date as tomorrows date or later.
•
Select Daily:
Set On Time 1 to 00:00, Set Off Time 1 to
24:00.
•
Select Weekly:
Set all days to YES.
•
Set Days/cycle to 1
Select Setup menu, then Wind menu
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