Operation
MicroVol-1100 User manual 1.6
The data logging features and parameters in the Status menu continue to
function as normal. The triggering device must have either a contact closure
or logic output signal (0-5VDC). A cable will be required to connect the
triggering device to the MicroVol. For details of the electrical connections
refer to section 2.1.2.
•
External triggering uses the wind direction input connector and
internal circuitry to monitor the external trigger, so wind control and
external trigger cannot be used together.
•
The Trigger Lo and Trigger Hi parameters specify the voltages that
the external trigger voltage must be between to trigger the MicroVol.
If these voltages are the same then external triggering is disabled.
•
If the external trigger is a contact closure then Trigger Lo should be
0.5v and Trigger Hi should be 6v.
•
To trigger above a set voltage, set Trigger Lo to that switching
voltage and Trigger Hi to 6.
•
To trigger below a set voltage, set Trigger Lo to –1 and Trigger Hi to
that switching voltage.
•
The OFF Delay specifies the time in hours and minutes that the
Microvol continues to sample after triggering.
•
Unlike the wind sensor menu, the status of the trigger device is
checked ‘on the minute’ (when the seconds of the MicroVol clock
reach “00” seconds.)
•
The MicroVol switches on when a valid trigger is received. The
MicroVol will then sample for a set time duration, called the “OFF
Delay”. Trigger function uses a Trigger Time counter to count up to
the OFF Delay value.
•
A parameter called ReTrigger controls how the MicroVol deals with
repeated trigger signals during the active sampling period.
•
If the ReTrigger parameter is set to YES, then each time the
MicroVol clock reaches :00 seconds, the Trigger Time counter resets
to zero if the trigger condition is met, ie. The trigger operates from
the end of the last valid trigger signal.
•
If the ReTrigger parameter is set to NO then the OFF Delay operates
from the start of the trigger signal. The Trigger Time counter will
reset only if the trigger goes off for a :00 crossing (MicroVol clock
reads hh:mm:00), and then retriggers at a later :00 crossing. This
means that if the initial trigger is still active at the end of the OFF
Delay period, then the MicroVol will stop sampling until the trigger
goes off and then on.
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Summary of Contents for LVS-100
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