Log Functions - Landis+Gyr ULTRAHEAT T450 Technical Description

Log functions

13 Log functions
Note: Read-out is performed via M-Bus or the optical interface
with UltraAssist.
In the internal logbook, metrologically relevant events (errors, states, actions)
are stored in chronological order with their time of occurrence. The events ac-
quired are predefined. The data of the logbook cannot be deleted.
Each event is stored in a separate 4-level shift register; the overflows are
transferred to a 25-level circulating buffer. Therefore, at least the last 4 times
can be traced for each event.
In a monthly register, the error states are stored for the current month and for
the past 18 months (without time stamp).
F0 = Flow measurement not possible
F1 = Interruption hot side temperature sensor
F2 = Interruption cold side temperature sensor
F3 = Electronics for temperature evaluation defective
F4 = Battery status critical
F5 = Short circuit hot side temperature sensor
F6 = Short circuit cold side temperature sensor
F7 = Data storage defective
F8 = Temperature sensor error > 8 hours
F9 = Internal communication error
F10 = CRC incoherent
F11 = Flow sensor mounted incorrectly
F12 = Temperature sensors mounted incorrectly
W0 = Soiling prewarning
W1 = Storage prewarning
W2 = Voltage drop during COM
W3 = Battery must be replaced
W4 = Pipe burst detected
Description
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