HML 210
40
Problem with watch-dog circuit
ADDRESSING TO SERVICE
Wrong configuration work data in eeprom
Wrong configuration safety data in eeprom
Defective keyboard (one or more key are pushed during the test)
Power supply voltage (+3.3) is out of range
Power supply voltage (+13) is too low (<10V)
Power supply voltage (+13) it’s too high (>14V)
Timeout calibration input (input circuit is broken)
0400 Gain input stage is out of range
Check the status of the cables connecting the sensor to
the converter, the grounding connections of the devices
or the possible presence of strong and anomalous noise
0800 Interruption on the coils circuit
Check the status of the cables connecting the sensor to
the converter
0C00 Cumulative alarm 0800 + 0400
See single codes 0800 and 0400 above.
ALARM MESSAGES
CAUSES AND ACTIONS TO BE TAKEN
ANOMALIES CODES
Messages ANOMALIES ACTION TO TAKE
MAX ALARM The flow rate is higher than the maximum threshold set
Check the maximum flow rate threshold set and the
MIN ALARM The flow rate is lower than the minimum threshold set
Check the minimum flow rate threshold set and the
FLOW RATE >FS
The flow rate is higher than the full scale value set on the
Check the full scale value set on the instrument and
PULSE/FREQ>FS
The pulse generation output of the device is saturated and cannot
generate the sufficient number of impulses
Set a bigger unit of volume or, if the connected
counting device allows it, reduce the pulse duration
EMPTY PIPE
The measuring pipe is empty or the detection system has not
Check whether the pipe is empty or repeat the empty
pipe calibration procedure
BATCH ALARM
Batch interrupted for the followings condition:
Timer batch expired before the end of the batch
Batch valve open and flow rate to zero for a time longer
to the safety timer set
Batch valve closed and flow rate different from zero for
a time longer than the safety timer set
Verify:
Presetting
System conditions
INPUT NOISY
The measure is strongly effected by external noise or the cable
connecting the converter to the sensor is broken
Check the status of the cables connecting the sensor,
the grounding connections of the devices and the
possible presence of noise sources
The coils or the cable connecting the sensor are interrupted
Check the connecting cables to the sensor
CURR. LOOP
OPEN
The 4-20mA output on board or the optional one are not correctly
closed on a valid load
Verify the load is applied to the output (max 1000
ohm).
To disable the alarm,set the “mA V.fault” value
P.SUPPLY FAIL Power supply different from that indicated on the label.
Verify that the power supply is with in the
specifications indicated on the label
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