Endress+Hauser Liquistation CSF48 - Page 96

Operation Liquistation CSF48
96 Endress+Hauser
10.3.1 Overview of the possible program types
The graphic below explains the various ways sampling can be controlled on the basis of a flow
curve:
Sampling mode Basic program type Standard program type Advanced program type
Time proportional sampling
(CTCV)
Time proportional sampling
(CTCV)
Time proportional sampling
(CTCV)
Flow-paced Flow-paced Flow-paced
Vacuum/peristaltic pump, Single sample
Sampling assembly Sampling table
External signal
Fieldbus (optional)
Peristaltic pump Flow proportional
sampling/time override
(CTVV)
Flow proportional
sampling/time override
(CTVV)
Flow proportional
sampling/time override
(CTVV)
a0014045
Fig. 88: Sampling control
QFlow
tTime
a. Flow curve
b. Time-paced sampling
A constant sampling volume (e.g. 50 ml) is taken at
steady intervals (e.g. every 5 min).
c. Flow-paced sampling
A constant sampling volume is taken at variable
intervals (depending on the inflow volume).
d. Time/flow-paced sampling
A variable sampling volume (the sampling volume
depends on the inflow) is taken at steady time
intervals (e.g. every 10 min).
e. Event-controlled sampling
Sampling is triggered by an event (e.g. pH limit
value). Sampling can be time-paced, flow-paced, or
time/flow-paced, or single samples can be taken.