OPERATION
6
79
OPTIFLEX 1300 C
www.krohne.com
01/2008 • 4000172301 - HB OPTIFLEX 1300 R02 en
C.1.13
measuring
mode
In Direct
Direct
Direct
Direct mode, the instrument
measures the time it takes to
receives a reflection of the
signal from the surface of the
tank contents. In TBF
TBF
TBF
TBF mode,
the instrument measures the
time it takes to receives a
reflection of the signal from the
end of the probe. TBF mode is
used to measure one product
with a low
ε
r
. Automatic
Automatic
Automatic
Automatic mode
automatically switches the
measuring mode between
Direct and TBF mode. This is
sufficient for most applications.
We recommend that you use
Direct mode for products with
an
ε
r
≥
1.6 (this depends on the
probe type). If
ε
r
≤
1.4, use TBF
mode.
automatic; direct; TBF
automatic
C.1.14
product
ε
r
This function is available if TBF
mode is selected in C.1.13. If
possible, type in the exact value
of the product's dielectric
constant. If you do not know the
exact value, use the default
value. A new product
ε
r
that is
too low will mean that level will
read higher than its true value.
min-max: 1.10 to 115.00
2.4
C.1.15
gas
ε
r
A major parameter for TDR
level measurement devices. If
there is too much dust in the
tank, set the
ε
r
value of the
air/gas.
min-max: 0.8...115
1
C.1.16
level
threshold
If it is difficult to identify the
level signal (for example: too
many parasite signals), you can
increase the level threshold
and the amplification (Gain) of
the signal. For more data, refer
to
Thresholds and parasite
signals
on page 94.
7 Gains, min-max: 0...+1.25 V.
Depends on
Gain
C.1.17
interface
threshold
Instruments for interface
applications only. If it is difficult
to identify the interface signal
(for example: too many parasite
signals), you can increase the
interface threshold and the
amplification (Gain) of the
signal. For more data, refer to
Thresholds and parasite
signals
on page 94.
7 Gains, min-max: 0...+1.25 V.
Depends on
Gain
Menu No. Function
Function description
Selection list
Default
HB_OPTIFLEX1300_EN_D4_080428.book Page 79 Tuesday, April 29, 2008 2:47 PM