Taking Auto-Repeat Readings
Readings can be taken continuously in the auto-repeat mode for hands-free
operation. The unit will automatically clear the average after 10 readings to begin
averaging a new sequence.
1 Press and hold the Read button to initiate a reading, then release.
A continuous read session will begin.
2 To end the continuous read session, press the Stop button once.
The display will indicate the current flow reading (Flow), the average flow
value (Average) and the number of readings in the average (Number
in Average) up to 10.
6.5 Resetting the Averaging Sequence
The number of readings in an averaging sequence can be reset to (00) at any time
by pressing and holding the Stop button for 2 full seconds.
6.6 Printing
The DC-Lite must be turned on before connecting a printer cable to its parallel
port, located on the back of the unit. Failure to do so will result in the display
stating "Nexus Control." If this occurs, remove the printer cable and reset the
DryCal using the white recessed Reset Button on the back of the unit as
described in Section 6.10.
The DC-Lite sends basic ASCII text in IBM/Centronics parallel format to a printer.
Bios cannot guarantee compatibility with any printer other than the Bios BP-1
battery-powered thermal printer. Bios offers the BP-1 stand-alone printer for hard
copy output of the DC-Lite's flow readings. The printer is small, portable, and easy-
to-use, printing data to 4" wide thermal paper. It makes an excellent dedicated
printer for use with most Bios products. Although the DC-Lite may indeed work
with older and some stand-alone, IBM-compatible office printers (those not requir-
ing an attached computer and software for operation), we do not recommend their
use, as you may receive only one line per page, or other poor results. If you wish
to experiment, try the "Wide 1" and "Wide 2" formats to test compatibility.
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6.3 Disabling & Re-Enabling the 5-Minute
Auto-Shutoff Feature
5-minute auto-shutoff is the default setting for the DC-Lite. This feauture can be
disabled if your application requires a longer standby time. The 5-minute
auto-shutoff feature must be disabled each time the unit is powered on or reset.
Please note that the DC-Lite’s protective circuitry prevents the battery from over-
depletion. If the battery is too weak, the DC-Lite may automatically shut off due to
low battery voltage. This is more likely to occur if the 5-minute auto-shutoff feature
is disabled.
Disabling the 5-minute auto-shutoff feature
1 Press and hold the Read button, then press the On button (or the Reset
button if the unit is already on).
2 The display will read, “Auto-Off Disabled” until the Read button is released.
Re-enabling the 5-minute auto-shutoff feature
With the unit on, push the Reset button.
6.4 Taking Readings
Taking Single Readings
The DC-Lite's inlet and outlet ports are located on the right side of the unit. The
upper port (inlet) is for use with a pressure flow source, and the lower port (outlet)
is for use with a vacuum flow source. Tubing is connected to either port,
depending upon the flow source being used. After the first single reading, all
subsequent readings will be used to calculate the average flow. After 10 readings,
the average will be cleared to begin a new averaging sequence.
You will know a reading has begun when the valve "clicks" shut, the flow cell's
green LEDs light, and the piston rises within the flow cell.
1 Connect the tubing from the flow source to the DC-Lite's inlet or outlet port.
If using a sampling medium, such as a filter cassette, connect it to the
tubing between the flow source and the DryCal (in-line).
2 Press and release the Read button to obtain a single flow measurement.
The flow measurement will appear on the LCD display in milliliters or liters,
as applicable.
3 Continue pressing the Read button for single measurements until you have
reached the required number of flow readings.
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