ISCO 6700SR, Инструкция по эксплуатации, Страница: 103 / 190

6700SR Refrigerated Sampler
85
Sample at Enable or Disable
You have the option of directing the sampler to take a sample as
soon as it receives the enable and/or disable signal. If you program
the sampler to stay enabled and choose to take a sample at enable,
the sample interval will be reset at the enable time. Samples at dis-
able do not affect the sample intervals. Standard programs do not
take a sample at the enable time.
Delay To Start Of Sampling
If you have selected ONCE ENABLED STAY ENABLED and have
chosen to not sample at the enable, you have the opportunity to sus-
pend the start of sampling. This option is useful for storm programs
that require a flow-paced sample taken after the initial grab sample.
Resetting the Sample Interval at Enable
You may want the pacing countdown to start over each time the
sampler becomes enabled. To accomplish this simply select YES at
screen
20 . The next sample event will occur at the end of a full in-
terval. Furthermore, if the sampler is enabled several times during
the program, it resets the countdown each time.
Use the reset-interval feature carefully. For example, avoid reset-
ting the interval when you sample with uniform-time pacing and
want to take samples at specific times.
The effects of resetting the interval can be seen in this example: A
sampler has been programmed to sample every 15 minutes and to re-
set the interval when enabled. It receives an enable signal at 10:03
and takes a sample. After resetting the interval, the sampler takes
subsequent samples at 10:18 (not 10:15), 10:33 (not 10:30), and so on.
Screen 22 is available only when you select NO at screen 21 . You
can have the sampler continue the countdown, repeating it as often
as necessary while the sampler is disabled, or you may suspend the
countdown while disabled, resuming the countdown as the sampler
is enabled. The standard program allows the countdown to contin-
ue while disabled.
Pauses/Resumes
Pause and resume settings, available in extended programming,
create an intermittent sampling schedule. A program with pauses
and resumes begins sampling at its programmed start time, con-
tinuing until the first pause time and day of the week. It then sus-
pends sampling until the first resume time, when it begins
sampling again. If the start time falls within a pause period, the
sampler will not begin sampling until the next resume time. Pause
and resumes repeat weekly.
You can enter up to nine pairs of pause and resume times using
screen
23 . The pause and resume times shown as examples in this
screen suspend the program between 5:00 p.m. Monday and 8:00
a.m. on Tuesday and between 5:00 p.m. Tuesday and 8:00 a.m. on
Wednesday. If the start time is Monday at 8:00 a.m., the sampler
takes samples between 8:00 a.m. and 5:00 p.m. Monday; between
8:00 a.m. and 5:00 p.m. Tuesday; and, continues after 8:00 a.m.
Wednesday. To remove pause and resume settings from a program,
select CLEAR in screen
23 .
Pause and Resume Screens
Screen charts containing the pause
and resume screen appear in:
Figure 35, Extended Programming:
Programmed Sampler Enable on
page 119.
Figure 39, Extended Programming:
Quick View; Programmed
Sampler Enable on page 123.
23
PAUSE RESUME
1. 17:00 MO 08:00 TU
2. 17:00 TU 08:00 WE
CLEAR DONE
24
SAMPLE AT RESUME?
YES NO