User's Manual

7ML19985LY01 SITRANS LR560 (FF) – INSTRUCTION MANUAL Page 145
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D: Technical Reference
If the LOE condition persists beyond the time limit set in Loss of Echo (LOE) Timer
(2.3.4.) the LCD displays the Maintenance Alarm icon, and the text region displays the
fault code S: 0 and the text LOE.
If two faults are present at the same time, the fault code, error text, and error icon for
each fault are displayed alternately. For example, Loss of Echo and faulty power supply:
S: 0 LOE S: 2 NO TECH POWER
Upon receiving a reliable echo, the loss of echo condition is aborted, the Maintenance
Alarm icon and error message are cleared, and the reading returns to the current level.
Loss of Echo (LOE) Timer (2.3.4.)
LOE Timer determines the length of time a Loss of Echo (LOE) condition will persist
before the function block will show a status of BAD or UNCERTAIN. The default is
100.000 seconds.
Temperature derating curves
WARNINGS:
• Never attempt to loosen, remove or disassemble process connection
or instrument housing while vessel contents are under pressure.
• This product is not
intended for use as a safety device per Directive
97/ 23 / EC
• The user is responsible for the selection of bolting and gasket
materials which will fall within the limits of the flange and its intended
use and which are suitable for the service conditions.
• Improper installation may result in loss of process pressure.
ambient temperature
–40 °C to 80 °C
(–40 °F to 176 °F)
process temperature:
–40 to +100 °C (–40 to +212 °F) or
–40 to +200 °C (–40 to +392 °F) depending on the version