+GF+ 2298 Bedienungsanleitung Seite 27

Instruction manual
5.2.4 P03 Maximum sensing distance
FACTORY DEFAULT: See Xmax + 30 cm (1 ft).
The maximum sensing distance measured from the process connection. The device evaluates level signals only within the specified
distance. The maximum sensing distance is type-specific. See the Xmax column (+30 cm [+1 ft]) of the type-specific measurement
distance table below. Smaller values can be set. The minimum value is parameter P05 + 30 cm (1 ft). It is not necessary to set this
parameter. The device automatically selects the detection distance based on the zero-level distance specified in P04, within the li-
mits of P03.
P03
Measurement configuration ➙ Sensing Distance
EView2
Type-specific measuring distance
Minimum Xmin*
0.056 m (2.2")
0.070 m (2.75")
0.070 m (2.75")
0.069 m (2.7")
0.080 m (3.15")
0.080 m (3.15")
0.115 m (4.53")
5.2.5 P04 Zero-level distance (tank height – H)
FACTORY DEFAULT: See Xmax in the table
This parameter must always be set, except for distance measurement.
The zero-level distance (P04) is the distance between the sealing plane of the process connection and the designated zero level of
the level measurement (e.g., the bottom of the tank). The device calculates the level value from the P04 value by subtracting the
measured level distance. The device automatically sets the measuring distance within the maximum sensing distance (P03). The
distance given here is denoted by 'H' in the figures and formulas. The maximum distance that can be measured (Xmax) is in the
measuring distance table above, depending on the selected type. The set zero-level distance can be greater than the maximum
measuring distance but not exceeding 60 m (200 ft).
Since the level measured by the device is the calculated difference between the P04 set for the given application and the distance
(DIST) measured by the device, it is important to specify the zero-level distance (H) accurately.
P04
Measurement configuration ➙ Zero-level distance
EView2
5.2.6 P05 Close-end blocking (dead-zone)
FACTORY DEFAULT: See Xmax in the table
The dead-zone (starting from the process connection of the transmitter) is the range within which the device cannot measure due to
its physical limitations (antenna insertion length). This is the minimum measuring distance of the device, and it is type-dependent.
See the Xmin column of the type-specific measuring distance table above.
Close-end blocking is the user-defined extension of the dead zone, within which the device does not consider any echoes. This, e.g.,
enables the exclusion of objects interfering with the measurement close to the sensor. Close-end blocking cannot be less than Xmin.
P05
Measurement configuration ➙ Minimum (P05)
EView2
Maximum Xmax*
10 m (33 ft)
10 m (33 ft)
20 m (66 ft)
10 m (33 ft)
10 m (33 ft)
20 m (66 ft)
30 m (98.5 ft)
Type 2298 80 GHz Radar Level Sensor
* From the plane of the process connection.
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