F:\MARKETING\TECHNICAL MANUALS\Air Samplers\DF Battery TECH MANUALS\DF-75 LPM SERIES.doc
Tel: (352) 680-1177 / Fax: (352) 680-1454 / Email: [email protected]
10
OPERATING FEATURES and INSTRUCTIONS (Cont.)
POWER SOURCE
The 75 LPM DF Battery air samplers can be powered from any of the following power sources:
1.
A 110VAC or 230VAC line power via the three-prong electrical connector at the rear of the
enclosure. This line power is converted to 12 VDC power through a universal transformer
accepting AC line voltage from 100VAC to 250VAC.
2.
A 12 VDC Automobile Cigarette Lighter or Accessory socket. This connection is located at
the rear of the air sampler.
3.
An internal 12 VDC lead acid or 14.8 VDC Lithium ion battery when external AC or DC
power is not available. The AC line voltage will charge the internal lead acid or Lithium ion
battery.
ON-OFF SWITCH
The ON/OFF switch is on the Digital Flowmeter. This enables the user to turn the air sampler on and
off with one switch.
FUSES
The 75 LPM DF Battery Series Units have a 3 amp fuse in the AC socket (PN CEINF).
ELECTRICAL FLOW CONTROL
The 75 LPM DF Battery air samplers utilize motor speed flow control. This is adjusted in the setup
process of the Digital Flowmeter (DFM).
FLOW MEASUREMENT
Flow is indicated on the LED display when the UNITS green LED is in the FLOW position on the
DFM. Various flowmeter ranges and flow measurement units are selectable at the time of purchase
since they are set at the factory.
DIGITAL FLOWMETER CALIBRATION
The Digital Flowmeter calibration accuracy should be verified on a once per year frequency absent any
suspected or observed damage to the unit. A factory calibration is recommended at the time of known
or suspected damage to the unit.
PUMP CAPACITY
The maximum sampling flow rate achievable by the 75 LPM DF Battery Series air samplers is
dependent upon the flow restriction characteristics of the charcoal filter and/or particulate filter
utilized. In general, coarser mesh charcoal, larger diameter filter paper and/or more porous filter paper
will enable one to achieve higher flow rates. The end user must determine the specific objectives of the
sampling application and utilize the proper combination of filters and flow rate to achieve the desired
objectives.
BATTERY CAPACITY INDICATOR
There are 5 LEDs under the quick disconnect that indicate the percentage of battery charge available.
When the white button under the column of LEDs is pressed, an LED will illuminate. The 5 LEDs
indicate 100%, 75%, 50%, 25% or 0% battery capacity.
BATTERY CHARGING INDICATOR
The red LED under the Battery Capacity Indicator illuminates when the battery is charging.
