Sensidyne gilian gilibrator 2 Operation & Service Manual - page 23
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GILIAN GILIBRATOR 2 CALIBRATION SYSTEM
Sensidyne Document No. 850190M (Rev G)
4.2
WET CELL OPERATION
4.2.1
Start Up
Turn on the sampling source.
Depress the Bubble Initiate Button several times to
wet the inner walls of the flow tube. You will not be
able to initiate a timing bubble without first “priming”
the flow tube. You will develop a feel for bubble gen-
eration with practice.
After the Flow Tube walls have been primed, Push the
ON
button on the Control Unit. Wait approximately 10
seconds while the unit conducts self-tests and sends a
header line to the printer or computer (if one is con-
nected).
4.2.2
Bubble Generation
1)
For optimum bubble generation, depress the
Bubble Initiate Button and hold to initiate the first
bubble to travel up the flow tube. Release the but-
ton to initiate a second bubble to travel up the
Flow Tube. Repeat this process to obtain addi-
tional readings This will be the standard proce-
dure to making clean, consistent bubbles.
2)
As the bubble rises up the Flow Tube, it initiates a
timing sequence when it passes the lower sensor
and completes the timing sequence when it
passes the upper sensor. The timing information is
then transmitted to the control unit where the
necessary calculations are performed and a flow
reading appears on the display.
IMPORTANT
If a bubble breaks before the time sequence is com-
pleted, timing will continue until another bubble is
generated to trip the upper sensor. This causes an
erroneous reading and should be subtracted from the
average by pressing the
DELETE
Button for about 1
second.
If a printer is used, be sure it has completed its printing
sequence before pressing the
DELETE/RESET
button.
When this button is pressed for less than 1 second, a
negative symbol appears on the Control Unit display.
The printer also initiates a line showing this subtrac-
tion. If a computer is connected, this subtraction is
shown on the computer screen.
4.2.3
Flow Readout
•
Display
The Control Unit displays the actual flow for each
sample, as well as the accumulative average flow rate
across samples, and the current sample number.
To delete an obviously false reading, push the
DELETE/
RESET
button for about 1 second. This automatically
deletes the false information from the average. The av-
erage and sample number revert back to the previous
reading.
To re-initiate the entire sequence, push the
DELETE/RE-
SET
button for at least 3 seconds. This zeroes all
samples and averages within the Control Unit and
causes the printer (or computer) to index one line and
reprint (or re-display) the sequence headings. This de-
notes the start of a new sequence.
•
Printer
The printer will print in sequence the flow, average,
and sample number of each successive bubble read-
ing.
NOTE
In order to use the “Paper Feed” function of the printer,
turn the Power Switch “OFF” and “ON” again.