Casella CEL DryCal DC-Lite flow calibrator - Manual (Page 6)

6.1 Charging the Battery
Before using your DryCal DC-Lite, be sure that the battery system has been fully
charged to ensure that unit will perform without interruption. Using the DC-Lite
with a low battery will not affect the product’s accuracy.
The DC-Lite is equipped with a battery indicator that provides battery charge
indication at three levels. When the battery indicator on the display is empty the
unit will continue to operate for a limited period of time before shutting itself off.
To Charge the DC-Lite
To view the actual charging status during the charging period, disconnect the
battery charger and wait 3–5 minutes. When the indicator is solid black the battery
is fully charged. Bios recommends leaving the DC-Lite on charge when not in use
to prevent battery degradation.
1 Connect only the appropriate Bios 12VDC charger, provided with the DC-Lite
calibrator, into a standard wall outlet.
2 Insert the charger barrel plug into the charging jack located on the right side
of the DC-Lite housing above the inlet and outlet air bosses. A green Charge
LED will illuminate while the unit is charging. Full charge takes 8 to 12 hours,
and the DryCal can charge while being used.
6.2 Battery Maintenance & Storage
The DC-Lite’s lead-acid battery will not exhibit the memory effect common to
nickel-cadmium batteries. It may be left on charge for an indefinite time period
without damage.
Long-term storage without charging can damage the battery pack,
therefore if the DC-Lite cannot be left charging continuously, it should be
fully charged at least once every three months and should be placed in
storage only after achieving a full charge.
7.0 Isolating the DryCal from Other Instruments
The DryCal DC-Lite will mimic the flow source being used. Therefore, if the flow
source exhibits air flow pulsation, Bios recommends the use of an isolation device.
Use of a 25mm, 0.8m filter cassette makes a suitable load for most flow rates used
in industrial hygiene applications. This method stabilizes variations in flow due
to the slight pulsation caused by the stroke of the pump’s piston.
In addition, when taking flow readings with the DryCal DC-Lite, an internal valve
closes, placing an insertion pressure spike into the flow stream. Generally, the
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5.9 Printing to a PC
Bios International offers a parallel-to-serial converter kit, part PSC-1, that allows
the information from a DC-Lite to be printed to a computer via the HyperTerminal
utility included with Microsoft ® Windows TM .
This information can be imported into many commonly used spreadsheet
programs, such as Microsoft Excel or Quattro Pro. The DryCal parallel-to-serial
converter kit includes everything you will need to print flow readings from your
DryCal to a Windows-based PC.
Bios International only guarantees compatibility with parallel-to-serial converters
purchased through Bios International. Bios International does not offer technical
support on serial port configuration. For assistance with determing the correct
Com Port number or port configuration, please contact your IT professional.
5.10 Hard Reset Button
If for any reason the DC-Lite does not respond to push-button commands, it may
be necessary to reset the instrument. For this purpose there is a white recessed
button on lower right side of the back panel near the parallel printer port. The but-
ton resets the unit back to the initializing screen and the printer setting will revert
to the “Off” position. Before resetting, be sure to remove the printer cable from
the back of the DC-Lite. Failure to do so will result in the display reading “Nexus
Control.” If this occurs, remove the printer cable and reset the unit again.
6.0 Battery System
The DryCal DC-Lite is powered by an internal lead-acid battery. The battery will
power the instrument for 6–8 hours of continuous use and has a typical service life
of approximately 2–5 years, depending on use. The DC-Lite provides a convenient
5-minute automatic shut-off feature to extend battery life. Use of a printer does not
affect the battery life.
The DC-Lite can be charged by the Bios single-station charger when plugged into
a standard 115V AC power source outlet (220V AC optional). Provided that the
battery has sufficient charge to operate the DC-Lite, the DC-Lite can be charged
indefinitely using the AC wall adapter provided.
Although the DC-Lite may be plugged into AC power, if the battery is exceptionally
weak the DC-Lite may not function. Please read all setup and charging instructions
indicated in this manual before using equipment.
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