A&D Weighing AD-1690 - Manual (Page 11)

9
7. MEASUREMENT
(1) Power supply
Press the ON:OFF key (The display is
“display all”). After displaying the setting value
(quantity of pressure change and monitor time
for leak judgment), the display is“
REDY”
(that means READY) and is in the
measurement standby mode.
(2) Starting measurement
Connect the test pipette to the tip of the
attachment securely.
Press START key. The main unit starts the
measurement by operating the pump,
evacuating the air to －20kPa. (“
TEST”
display)
When - 20kPa is reached, the pump stops.
*-20kPa is approximately 0.2 atmospheres that
means that the air has been partially evacuated.
* While stabilizing the inside pressure, the display
may change by 0.1 to 0.2 kPa.
The main unit measures the quantity of the
pressure changed by the monitor time set.
(“
MEAS”display)
* Factory setting: monitor time is 3 seconds, quantity
of pressure changed is +0.3kPa.
(3) Measurement result
When the quantity of pressure change with leakage is in less than the setting value,
the Leak Tester judges that there is no leak and displays “pa55” (normal).
START
TEST
kPa
Measurement start
Measurement result
Pipette
Tip
Quantity of
pressure
change All displayed
Monitor
time
kPa
S E C
ON:OFF
REDY