Burkert Type 8041 - Manual (Page 35)

33
Adjustmentandcommissioning
Filter Position of switch 3
slow
(Response time 10 to 90 % = 14 s) OFF
fast
(Response time 10 to 90 % = 5 s) ON
9.6. selecting the measurement
range
The output signal is proportional to the measured flow velocity.
Switches 4 and 5 are used to adjust the measuring range of the
device to your application.
→
Position switches 4 and 5 to select the measuring range (see
Fig. 26, and the following table).
After the measuring range has been modified, the per-
centages set for the low and high switching thresholds are
applied to the new full scale selected.
Measuring range Position of
switch 4 Position of switch
5
0 to 2 m/s ON OFF
0 to 5 m/s OFF ON
0 to 10 m/s OFF OFF
0 to calibrated full scale
(between 2 and 10 m/s) ON ON
9.7. calibrating the flow zero point
→
Calibrate the device on commissioning and after each
maintenance task.
• 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
task:
→
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 Fig. 28 and Fig. 29).
English
Type 8041