False echo suppression
•
With the tank empty, check whether
distance displayed in V0H8
corresponds to the distance to the
product surface "D".
# VH Entry Significance
1 Empty vessel as far as possible
➤ Basic calibration
2 V0H8 ****
VH
Check value
3 Values correspond?
Echo is level echo➝ procedure A
Suppression up to echo
Values do not correspond?
Echo is false echo ➝ Procedure B
Suppression inclusive echo
Procedure A
Echo is level echo
# VH Entry Significance
➤ Extended calibration
1 V3H0 2
H
2: up to echo
2 V3H1 ****
+
H
Register value
when display
flashes
3 Wait approx. 3 minutes until the fault indicator
disappears.
Procedure B
Echo is false echo
# VH Entry Significance
➤ Extended calibration
1 V3H0 3
H
3: inclusive echo
2 V3H1 ****
+
H
Register value
when display
flashes
3 Wait approx. 3 minutes until the fault indicator
disappears.
➤ Basic calibration
4 V0H8 ****
VH
Check value again
5 Repeat steps 2...4 until V0H8 = D.
Then Procedure A.
Note!
•
The LED and fault indicator flash while the false echo suppression map is being
recorded. Warning E514 appears.
•
There is a further method of recording a false echo suppression map (V3H0 = 4)
which is described in Chapter 7.6
Check echo quality
# VH Entry Significance
➤ Extended calibration
1 V3H2 ****
H
Echo quality
≥ 10: OK
<10: Optimise
alignment
Chapter 7.5.
Change
position.
After calibrationAfter calibration, the Micropilot measures level in %. The analogue output follows the
display in V0H0. The current values 4 mA and 20 mA are automatically assigned to the
levels 0% and 100%.
D
V0H8
BA171Y39
DD
V0H8
V0H8
BA171Y81
Procedure A
Procedure B
V H
V3H2 >10:
BA171Y70
Note!
Micropilot FMR 231 Chapter 6 Calibration with Display/Remote Operation
Endress+Hauser 27
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