Selecting The Measurement Range; Calibrating The Flow Zero Point - Burkert 8041 Manuel Utilisateur

Adjustmentandfunctionalities
Flow filter level
slow
(response time 10 to 90% = 14 s)
fast
(response time 10 to 90% = 5 s)
10.6. selecting the measurement
range
The output signals are proportional to the measured fluid velocity.
Switches 4 and 5 are used to adjust the measurement range of the
transmitter to your application.
→
Select the measurement range by positioning switches 4 and 5
(see Fig. 24 and following table).
Measurement range
0 to 2 m/s
0 to 5 m/s
0 to 10 m/s
0 to full scale calibrated
(between 2 and 10 m/s)
After the measurement range has been modified, the percentages
set for the low and high switching thresholds are applied to the new
full scale selected.
Type 8041
Position switch 3
OFF
ON
Position Position
switch 4 switch 5
ON OFF
OFF ON
OFF OFF
ON ON

10.7. calibrating the flow zero point

→
Calibrate the transmitter on commissioning and after
each maintenance operation.
• Before calibrating the zero point on commissioning:
→
immerse the measuring element in the fluid for 24 h
before calibration.
• Before calibrating the zero point after each maintenance
operation:
→
immerse the measuring element in the fluid for 1 h before
calibration.
→
Before calibration, ensure that the pipe does not contain
any air bubbles and that the fluid is not moving.
→
Fill the pipe with fluid.
→
Stop the flow.
→
Calibrate the "zero flow" point (see
English
Fig. 26 and Fig. 27 ).
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