Siemens 7ML1301-1, Instruction Manual, Page: 70 / 99

Page 66 SITRANS LG200 – INSTRUCTION MANUAL 7ML19985KA02
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Blocking Distance (BlockDis)
Also known as Blanking distance. Enter distance below reference point where level is not
sensed (also called blanking distance). (User password)
Typically used for single rod applications where long or narrow nozzles are producing
unwanted ringing near the top of the probe.
Because operation of the LG200 is not defined in the blocking distance, use the Safety
Zone Fault function. The safety zone is the user-defined area between the span and
blocking distance, and is used to set the measurement behavior approaching the blocking
distance.
Safety Zone Fault (SZ Fault)
Select loop current behavior when level is sensed in safety zone. Safety Zone is a user-
defined area just below the Blocking Distance. Enable Fault if necessary to ensure safe,
reliable high-level readings in critical applications. (User password)
If Latch 3.6 or Latch 22 is chosen, the loop current will remain in alarm until it is manually
cleared with the Safety Zone Alarm Reset below.
Safety Zone Height (SZ Height)
Enter distance below Blocking Distance where Safety Zone Fault will be implemented.
The SITRANS LG200 will report a Safety Zone Fault if the level rises into this area. (User
password)
Values
Range: 0 to 2286 cm (0 to 900 inches) (Default: 0)
Values
None (Default)
3.6 mA
22 mA
Latch 3.6
Latch 22
Values
Minimum: 2.0 in; Range 0 to 3000 cm (0 to 1181 in)
(Default: 2.0 in)