F:\MARKETING\TECHNICAL MANUALS\Air Samplers\DF Battery TECH MANUALS\DF-75 LPM SERIES.doc
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F&J SPECIALTY PRODUCTS, INC
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The Nucleus of Quality Air Monitoring Programs
Low Voltage Limiting System Description
The F&J battery powered air sampler has a battery low voltage
limiting system installed, which will prevent complete
discharge of the battery.
The low voltage limiting circuitry promotes longer battery life
and increases the number of charging cycles.
This low voltage limiting circuitry is factory-preset. Once the
battery voltage reaches the factory-preset level, the instrument
will shut down and go into a safe mode. An operator will still
be able to retrieve the elapsed time and accumulated volume
data to the time of shut down.
The operating time on a single charge cycle will primarily
depend on the motor amperage draw.
Higher flow rates and filter media with greater airflow
resistance will effectively increase amperage draw and thus
shorten the operating run time of the air sampler.
Factory Preset Low Voltage Values
1)
Lithium ion Battery:
12V
2)
Lead Acid Battery:
10.5V
