Hach-Lange BUEHLER 3010 4010 4210 4410 Manual - Manual (Page 21)

Operation
Page 21 Manual BÜHLER BU4010ff
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
extractions 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
extractions e.g.
100
Flow-
proportional Samples are not extracted with
a fixed volume but within a
fixed time interval (e.g. every
10 minutes).For this kind of
sampling, the variable
automatic dosing system
(available as option) is
required. This system is only
working with an analogue flow
signal!
The sample volume adapts •Analogue signal (4-20 mA or
optional 0-20 mA)
•The max. sample volume at
20 mA is fixed to 200 ml.
At an analogue signal of e.g.
10 mA, a 100 ml sample would
be extracted accordingly.
Sampling is effected in a fixed
time interval of e.g. 10
minutes.
Thus the sample extraction is
Sampling modes