Teledyne Optima, Pocket Manual, Page: 75 / 112

Section 3 Programming
3-29
water flowing through the channel. This
is sometimes called “Constant Volume
Variable Time (CVVT) sampling.” When
you program the sampler for flow pacing,
the sampler will prompt you to enter the
number of pulses to count before
collecting a sample.
All Teledyne ISCO flow meters provide a
compatible flow pulse. Non-ISCO flow
measurement devices may be used to paced the
sampler. Refer to Section 2.8– External Devices
for more details.
Use the F3(S
EL
) button to select the time or
flow option, then press the E
NTER
button.
3.5.2 Time Paced
Time Paced Only – Use the number buttons to
enter the time interval in minutes. The sampler
collects a sample each time this interval elapses
while the program is running.
3.5.3 Flow Paced
Flow Paced Only – Use the number buttons to
enter the flow interval as a number of pulses.
While the program is running the sampler
counts the flow pulses until this number is
reached. At this time the sampler collects a
sample and resets the interval to begin
counting again.
The volume that each flow pulse represents is a
fixed volume. Refer to the instruction manual of
the flow measurement device.