Siemens SITRANS LR200 7ML5422, Руководство по эксплуатации

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SITRANS LR200 with mA/HART
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Operating Instructions, 05/2019, A5E32337676-AE
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 Fail-safe.
S: 0 LOE S: 52 Fail-safe
B.3.3 Current Output Function
Current Output Function (2.6.1.) controls the mA output and applies any relevant scaling. By
default it is set to Level. Other options are Space, Distance, and Volume. (The device can
carry out a volume calculation only after a vessel shape has been specified.)
When a volume application type is chosen, Sensor Mode remains as Level and the mA
Output is automatically converted to Volume.
To view the mA reading in the secondary region of the LCD, press
on the handheld
programmer.
B.3.4 Fail-safe Mode
The purpose of the Fail-safe setting is to put the process into a safe mode of operation in the
event of a fault or failure. The value to be reported in the event of a fault is selected so that a
loss of power or loss of signal triggers the same response as an unsafe level.
Timer (2.5.2.) (Page 103) determines the length of time a Loss of Echo (LOE) condition will
persist before a Fail-safe state is activated. The default setting is 10 seconds.
Material level (2.5.1.) (Page 103) determines the material level to be reported when Timer
(2.5.2.) (Page 103) expires, depending on the device type (standard or NAMUR NE 43-
compliant.)
STANDARD DEVICE
Options HI 20.5 mA (max. mA Limit)
LO 3.8 mA (min. mA Limit)
HOLD
Factory setting
Last valid reading
VALUE User-selected value defined in Level (2.5.3.) (Page 104)
NAMUR NE 43-COMPLIANT DEVICE
Options HI 20.5 mA (max. mA Limit)
LO 3.8 mA (min. mA Limit)
HOLD Last valid reading
VALUE
Factory setting
User-selected value defined in Level (2.5.3.) (Page 104) , de-
fault 3.58 mA
Upon receiving a reliable echo, the loss of echo condition is aborted, the Service Required
icon and error message are cleared, and the reading and mA output return to the current
material level.