When a centering disk is added to a rod probe, a new probe length must be measured and configured
in the transmitter. Failure to adjust the probe length and the probe termination configurations may
lead to inaccurate readings close to the end of probe or/and may require the user to increase the
blocking distance low. When using a centering disk with a rod probe, the probe length is defined as
the distance from the flange (reference plane) to the top of the disk as shown in Figure 3-12. When
using a wire probe, the probe length is independent of whether a centering disk is present or not as the
probe length is defined as the distance from the flange (reference plane) to the top of the end weight.
MODEL
KEY
SLG 720
SLG726
Note: "L" is the probe length specified in the transmitter model number
Figure 3-12: Probe length definition for rod probes using a centering disk
Revision 7
Table 3-13: Probe length for different probe types
PROCESS
CONNECTION
PROBE TYPE
TYPE
Rod and coaxial probes
Flanged and
Threaded
Wire probes
Rod and coaxial probes
Flanged
Wire probes
Rod and coaxial probes
Threaded
Wire probes
SLG 700 SmartLine Level Transmitter User's Manual
LENGTH ENTERED INTO
TRANSMITTER SOFTWARE
L
L - 150mm
L
L - 150mm
L + 25mm
L - 125mm
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