7ML19985AN02 SITRANS LU10 – INSTRUCTION MANUAL Page 85
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Technical Reference
Parameter Settings for Point # 1
With process control equipment disabled, enter the RUN mode to monitor system
performance and alarm programming. Otherwise, perform a Reading Measurement
simulation (P920).
When satisfied with system performance and programming:
• connect a high alarm indicator to LU SAM Relay # 1 (see P100 = 3).
• connect a low alarm indicator to LU SAM Relay # 6.
• connect a high high alarm indicator and filling equipment stop/start control to LU
SAM Relay # 11.
• connect a low low alarm indicator to LU SAM Relay # 16.
(Note that LU SAM relays are de-energized in "alarm" conditions).
When monitoring dusty dry solids, measurement difficulties may be encountered,
(especially when pneumatic filling equipment is used). For this example (assume the
maximum filling rate), failsafe operates as follows.
P001 Operation Enter "1" for level.
level.level.
level.
P002 Material Enter "2" for solid.
solid.solid.
solid.
P003 Measurement Response Enter "1" for slow
slow slow
slow (0.1 m/min).
P004 Transducer Enter "107" for XLT-30
XLT-30XLT-30
XLT-30.
P005 Units No entry required, (preset for meters
meters meters
meters).
P006 Empty Enter "30" for transducer face to Empty equals
30.00 meters.
30.00 meters.30.00 meters.
30.00 meters.
P007 Span No entry required, (preset to 29.01 meters
29.01 meters 29.01 meters
29.01 meters above
Empty).
P070 Failsafe Timer Enter "2" for failsafe activation after 2 minutes
2 minutes2 minutes
2 minutes
without a valid echo.
P071 Failsafe Material Level Enter "HI" for advance to Span on "LOE".
advance to Span on "LOE". advance to Span on "LOE".
advance to Span on "LOE".
P072 Failsafe Advance No entry required, (preset to restricted
restrictedrestricted
restricted).
P100 Relay Set Up Enter "3" for Hi, Lo, Hi Hi, and Lo Lo
Hi, Lo, Hi Hi, and Lo LoHi, Lo, Hi Hi, and Lo Lo
Hi, Lo, Hi Hi, and Lo Lo alarm relays.
P101 Hi Alarm Enter "25" for Hi Alarm at 25.00 m.
25.00 m.25.00 m.
25.00 m.
P102 Lo Alarm Enter "10" for Lo Alarm at 10.00 m
10.00 m10.00 m
10.00 m.
P103 Hi Hi Alarm Enter "27" for Hi Hi Alarm at 27.00 m.
27.00 m.27.00 m.
27.00 m.
P104 Lo Lo Alarm Enter "5" for Lo Lo Alarm at 5.000 m
5.000 m5.000 m
5.000 m.
e.g. 09:15 am Echo lost at 6.00 m, low alarm is still on, failsafe countdown begins.
09:17 am Failsafe activated, actual level = 6.16 m, reported level = 6.00 m.
09:57 am Low alarm off, actual level = 9.36 m, reported level = 10.00 m.
12:27 pm High alarm on, actual level = 21.36 m, reported level = 25.00 m.
12:47 pm Infeed stopped, actual level = 22.96,reported level = 27.00 m.
When the dust settles (and the echo is regained) the reported level advances
toward the actual level. When the reported level reaches 25.55 m (5% of Span
less than the high high alarm trip point), the high high alarm goes off, restarting
the infeed and filling the vessel to 27.00 m.
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