6.2 Basic calibration for bypass pipes and stilling wells:
After resetting the Micropilot to the factory settings (only required during commissioning),
enter the following parameters:
•
empty distance E, full distance F, application parameter A, microwave factor MF.
The datum point for the empty distance "E" is always the lower face of the process
connection. The full distance "F" may extend only as far as the antenna tip. The calibration
units are metres or feet, settable in V8H5 (0 = m, 1 = ft).
•
For Product Class B, it is recommended that the empty distance "E" is set 30 cm
above the tank bottom.
.
The microwave factor MF =
√ 1 – (X/d
2
),
whereby d = internal diameter of the pipe in mm
X = 925 at 5.8 GHz and 784 at 6.3 GHz (FCC approval)
The user has a choice of three application parameters, see also Chapter 7.4.
Calibration
# VH Entry Significance
➤ Simulation
1 V9H5 333
VH
Reset
➤ Basic calibration
2 V0H1 E m/ft
H
Empty distance
3 V0H2 F m/ft
VH
Full distance
4 V0H3 A
VH
Application
parameter
4: up to 7 m
5: up to 1.5 m
6: 7 m to 20 m
➤ Extended calibration
5 V3H3 MF
VH
Microwave factor
6 V0H0
V0H9
Current level in %
or m/ft
Version DN50 PN16 DN80 PN 16/40 DN 100 PN16 DN 150 PN16
MF (5.8 GHz) 0.8298 (d = 54.5) 0.9296 (d = 82.5) 0.9574 (d = 105.3) 0.9811 (d = 157.1)
Version ANSI 2"/150 lbs ANSI 3"/150 lbs ANSI 4"/150 lbs ANSI 6"/150 lbs
MF (5.8 GHz) 0.8151 (d = 52.5) 0.9281 (d = 81.7) 0.9574 (d = 105.3) 0.9811 (d = 157.1)
MF (6.3 GHz) 0.8459 (d = 52.5) 0.9394 (d = 81.7) 0.9640 (d = 105.3) 0.9840 (d = 157.1)
Code Application Significance
4 Stilling well up to 7 m long For slow changes in level
5 Stilling well up to 1.5 m long For short stilling wells with rapid level changes
6 Stilling well from 7 m to 20 m
long
For long stilling wells in high storage tanks
F
E
100%
20mA
0%
4mA
BA171Y03
30 cm from
tank bottom
for product
group B
Chapter 6 Calibration with Display/Remote Operation Micropilot FMR 231
26 Endress+Hauser
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