KROHNE OPTIFLEX 8200 C Handbook page 95

OPTIFLEX 8200 C/F/S
Menu Function
No.
2.5.2 Epsilon R Gas
2.5.3 Epsilon R
Product
2.5.4 Level Threshold
2.5.5 Interface
Threshold
2.5.6 Probe End
Threshold
2.5.7 Measuring Mode
06/2018 - 4006448901 - MA OPTIFLEX 8200 R01 en
Function description
Dielectric constant (ε ) of the gas in the
r
tank. A major parameter for TDR level
measurement devices. If the dielectric
constant of the gas is very different from
the default value (air), set 2.5.2 Epsilon R
Gas to the ε
Gas value of the gas.
Gas Gas
r
The ε
value for the liquid contents in the
r
tank.
If it is difficult to identify the level signal
(for example: too many interference
signals), you can increase the detection
threshold. This value is measured in
thousandths (1...1000). A threshold of 100
is equivalent to 10% of the amplitude of the
reference pulse at a distance of 1 m / 3.3 ft
from the flange facing or thread stop. For
Thresholds and
more data, refer to
interference signals
on page 109.
Refer to the "Default values for menu item
2.5.4 Level Threshold" table at the end of
this section.
If it is difficult to identify the interface
signal (for example: too many interference
signals), you can increase the detection
threshold. This value is measured in
thousandths (1...1000). A threshold of 100
is equivalent to 10% of the amplitude of the
reference pulse at a distance of 1 m / 3.3 ft
from the flange facing or thread stop. For
Thresholds and
more data, refer to
interference signals on page 109.
Refer to the "Default values for menu item
2.5.5 Interface Threshold." table at the end
of this section.
For measurement in AUTOMATIC mode. If
it is difficult to identify the probe end signal
(for example: too many interference
signals and the product has a low
dielectric constant), you can increase the
detection threshold of the signal. A
threshold of 100 is equivalent to 10% of the
amplitude of the reference pulse at a
distance of 1 m / 3.3 ft from the flange
facing or thread stop. For more data, refer
Thresholds and interference signals
to
page 109.
Refer to the "Default values for menu item
2.5.6 Probe End Threshold" table at the
end of this section.
In DIRECT mode, the device measures the
time it takes to receive a reflection of the
signal from the surface of the tank
contents. Direct mode is used for products
with an εr ≥1.6 (this value depends on the
probe type).
AUTOMATIC mode automatically switches
the measuring mode between Direct and
TBF mode. TBF mode is used to measure
one product with a low εr. In TBF mode,
the device measures the time it takes to
receive a reflection of the signal from the
end of the probe.
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Selection list or range
of values
min-max:
0.8...115.00
2.5.2 Epsilon R 2.5.2 Epsilon R 2.5.2 Epsilon R
min-max:
1.0...115.00
min-max:
0...1000
min-max:
0...1000
min-max:
0...1000
on
DIRECT, AUTOMATIC
OPERATION
6
Default
1
2.3
This depends on
the probe type
This depends on
the probe type
This depends on
the probe type
DIRECT: devices
with a
segmented
probe or a cable
probe (without
counterweight)
or devices
without a probe
AUTOMATIC:
devices with
other probe
types
95