Endress+Hauser FMR 231 - Page 40

Fault Analogue output Possible reason Remedy
Measured value jumps to
lower values despite constant
level
Multiple echoes ➀ If possible, increase first echo factor
page 35
➁ Optimise alignment
page 36
➂ If necessary, remount Micropilot in a
less central position
➃
☎ Call Service
Measured value drops to lower
value on approach to 100%
Product in window
suppression zone
➀ Match measuring range to window
suppression zone, page 38
➁ For levels over 100 % change
E and F if necessary, see basic
calibration, page 22, 23
E641 appears when the tank is
filled or emptied
Echo too weak to
be detected
➀ Change application parameter in
V0H3, page 39
➁ Optimise alignment, page 36 or .
check mounting position,
page 9 - 11
if possible, select better position
➂ Foam (measurement impossible)
➃☎Call Service
Analogue output does not
function correctly
Incorrect wiring or
wire broken
➀ Check wiring
No power ➀ Connect power supply
Electronics fault ➀
☎ Call Service
order spare part
No smart communication
Incorrect wiring
EMC fault
➀ Check wiring and min./max. load
see Technical Data, page 45
➀ Check screening,
see Connection, page 13
➀
☎ Call Service
20 mA
4mA t →
expected
happened
yes
yes
20 mA
4mA t →
expected
happened
20 mA
E641
4mA t →
expected
happened
yes
yes
no
yes
no
yes
no
yes
no
Chapter 7 Trouble-Shooting Micropilot FMR 231
38 Endress+Hauser