Span Adjustment; Calibration Of The Flow Zero Point - bürkert 8045 Bedienungsanleitung

4.5.2 Span adjustment

Span compensation provides the option of changing the basic setting of 20 mA. The proce-
dure is identical to that of the offset compensation above. The transmitter generates 20 mA
if the ENTER key is pressed when „SPAN" is displayed within the main test.
Measure the generated current with an ammeter. If the displayed value is incorrect it can be
corrected by entering the measured value on the ammeter.
Adjustment range: + / - 0.5 mA
CALIB 0
The corrected value of 20 mA is calculated when
position within the test menu.

4.5.3 Calibration of the flow zero point

Fill the pipe with the measured fluid and stop the flow. To calibrate the flow zero point, press
'ENTER' when CALIB 0 is diplayed within the test menu and select CALIB Y. After selection
the transmitter will automatically set the flow zero-point after 12 seconds.
- At first commissioning, immerse the sensor in fluid 24 hours before
calibration (only for 1 hour after maintenance).
- Ensure there are no air bubbles in the pipe and the fluid is not moving
before commencing the calibration.
This calibration is only valid for the actual parameters (pipe, fitting and fluid characteristics)
and must be completed before the determination of the K-Factor via the Teach-In method.
CALIB 0
FLOW
FLOW
8045
CALIBRATION
CALIB N
ENTER
0......9
CALIB Y
MEASURE
12 s
Enter the measured value
is pressed when at the "END"
ENTER
ENTER
ENTER
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