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QUI-1164
6.
General operation
6.1
Sampling events
The ACTI-VOC PLUS stores data for each sample event. The event data includes:
sample time, flow, volume and backpressure and is stored into non-volatile memory.
When the sampling event is stopped, the run data is available for review.
The data from the last 16 events is available in the data review menu, which is
accessible from the main menu.
When the data log is full, a warning message will appear upon starting a
NOTES
new sampling event and any data saved in subsequent events will be
lost. The data log should be cleared after the data is reviewed or
extracted to allow space for new events. The pump has the capacity to
store up to 16 events.
6.2
Sensor calibration
The pump has a built in automatic sensor calibration feature which allows the pump
to maintain an accurate stable flow rate by intermittently calibrating the pump's flow
sensor to establish the zero flow point. This routine occurs before starting, when the
internal temperature of the pump changes more than 3°C, or whenever one hour
has elapsed since the last sensor calibration. The calibration takes approximately
20 seconds during which time the pump stops running. Sample time and volume are
not counted during the sensor calibration routine as the pump automatically
accommodates this brief stoppage in the accumulation of sample results. The
message "Sensor Calibration" displays during this process.
6.3
Automatic fault system
The pump makes use of an automatic fault system which is activated when the
pump encounters operating conditions outside of the specified parameters. The
fault system indicates a fault condition through the LED display; the flashing LED
changes from green to red when a fault is encountered.
The pump displays the Fault screen after five seconds in a fault condition, this
details the cause of the fault.
If the fault persists continuously for 30 seconds, the pump will shut the sample off
to prevent sample collection under fault conditions. If fault retry is enabled, the
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