ISCO 6700SR, Инструкция по эксплуатации, Страница: 96 / 190

6700SR Refrigerated Sampler
78
Chapter 5 Reference
Sample Event
A sample event consists of a complete sampling cycle. A sample event
includes presample and postsample purges, line rinses, sampling re-
tries, and deliveries of sample volumes. Only one sample volume is
placed in a given bottle during a sample event, however, depending
on the distribution, multiple bottles may receive sample volumes.
Sample Volume
The sample volume is the discrete, programmed amount of liquid
delivered. During a sample event the sampler may deliver a sample
volume to several bottles, depending on the distribution. “Sample
volumes” and “samples,” are used interchangeably.
Extended programming adds a flow-dependent sample volume op-
tion for uniform time-paced programs. If a flow module is attached,
the flow source may be the module’s flow volume. Otherwise it is
the flow pulse count received at the external flow meter connector.
You enter the amount of flow required for each 10 ml of liquid.
When the sample event is initiated, the sample volume will be
based on the flow that has occurred since the last sample. This
sample volume will be at least 20 ml, but not more than the bottle
volume (or 9990 ml, whichever is smaller).
With flow-dependent sample volumes, the sampler resets the flow
volume count at the start time. Therefore, the sampler will not take
a sample at the start time.
Suction Head
Suction head is the vertical distance between the surface of the liq-
uid source and the sampler’s pump. At each sample event, the sam-
pler determines the suction head automatically. In extended
programming, you can manually enter the suction head if you
want. Select ENTER HEAD only when the head remains stable
and you can measure it accurately.
Rinses and Retries
Rinses and retries are extended programming features. You can
program the sampler to rinse the suction line automatically- Dur-
ing a line rinse cycle, the sampler draws liquid through the line to
the liquid detector. As soon as it detects liquid, the sampler revers-
es the pump to purge the line.
The sampling retries feature lets you set the number of times, from
0 to 3, that the sampler tries to detect liquid in the line before skip-
ping the sample (screen
2 ).
Chapter Contents
• Sample Event . . . . . . . . . . . . . .78
• Sample Volume . . . . . . . . . . . . .78
• Suction Head . . . . . . . . . . . . . . .78
• Rinses and Retries . . . . . . . . . .78
• Pacing . . . . . . . . . . . . . . . . . . . .79
• Distribution. . . . . . . . . . . . . . . . .81
• Sampler Enable . . . . . . . . . . . . .84
• Pauses/Resumes . . . . . . . . . . .85
• Start Times . . . . . . . . . . . . . . . .86
• Other Functions . . . . . . . . . . . . .88
• Manual Functions . . . . . . . . . . .88
• Programming Style . . . . . . . . . .88
• Hardware Setup. . . . . . . . . . . . .89
• Memory . . . . . . . . . . . . . . . . . . .97
• Flash Memory and Software
Upgrades . . . . . . . . . . . . . . .98
• Pressurized Lines . . . . . . . . . . .98
Extended Screen for
Suction Head Settings
Screens for Line Rinses and
Sampling Retries
1
AUTO SUCTION HEAD
ENTER HEAD
2
SUCTION HEAD OF
___ ft
(min - max)
3
__RINSE CYCLES
(0-3)
4
RETRY UP TO __ TIMES
WHEN SAMPLING
(0-3)