Hach-Lange BUHLER 2000 Water sampler - Manual (Page 18)

Operation
Page 18 Manual BÜHLER 2000/1029
Sampling modes
The following sampling modes can be programmed:
Sampling mode Description Example
Time-proportional In this sampling mode, the single
sample extractions as well as the
bottle change are effected in fixed
time intervals. Values to program:
sampling interval
e.g.
00:05 hh:mm
bottle filling time
e.g.
02:00 hh:mm
Flow-dependent
- digital In this sampling mode the sample
extraction is triggered by flow
pulses. The bottle change is
effected in fixed time intervals or
after a certain number of sample
extractions. Values to program:
pulse divider
e.g.
100
(that means that a sample is extracted
after each 100th pulse).
Bottle filling time
e.g.
02:00 hh:mm
or
bottle change after X sample extrac-
tions
e.g.
100
Flow-dependent
- analogue In this sampling mode samples are
extracted according to the analogue
flow signal (0-20 mA or 4-20 mA).
The sample extraction is started
when the programmed flow is
reached. Thus the interval between
the sample extractions varies
according to the flow signal. The
bottle change is effected in fixed
time intervals or after a certain
number of sample extractions. Values to program:
Flow per sample extraction
e.g.
1 m³
Bottle filling time
e.g.
02:00 hh:mm
or
bottle change after X sample ex-
tractions
e.g.
100
Event-proportional In this sampling mode the sample
extraction is depending on an
external event signal (potential-free
make contact). The sample is only
extracted as long as the signal is
present. The sampling interval as
well as the bottle change is
programmed. The bottle is changed
at each new event signal.
If an event is longer than the
programmed bottle filling time, two
or more bottles will be filled for this
event. Values to program:
Sampling interval
e.g.
00:05 hh:mm
Bottle filling time
e.g.
02:00 hh:mm