Chemtrac HydroAct HA4, User Manual

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3.1 UV254 Sensor 55
Display on main menu
When active the device tile is displayed on the main menu. If inactive, the tile
is hidden in the default view.
Sensor enabled This flag is enabled if the sensor is enabled.
Sensor on-line This flag is enabled if the sensor is on-line.
Sensor reading in warm up If the sensor reports that the current reading is not ready, then this flag
is set.
Sensor reading in hold This flag is enabled when the sensor output value is held, usually during, or
just after, self-cleaning or periods of maintenance.
Sensor process stopped If the sensor is off-line due to a process stop signal, this flag is set.
Sensor flush active This flag is set when the sensor is self-cleaning.
Sensor calibration warning reached
If the calibration is due and the maintenance warning is en-
abled, then this flag is set
Sensor maintenance period x warning reached If the maintenance warning is enabled and the due
date has passed, then this flag is set. The exact type of maintenance is sensor-specific. See
section 3.1.4.10 for details.
Turbidity Compensation Disabled This flag is set if the turbidity compensation for the UV transmis-
sion has been disabled.
Cleaning Cycle Active If set, this flag indicates that a cleaning cycle is underway (only available if
the auto-clean option is installed).
3.1.4.16 Error Flags
The error flags show any problems causing an error for a device. These flags can either be active or
not. To see the state of these error flags, select:
Options → Device Flags → Error Flags
Flags that are active are shown in black text on a white background, those that are not active are
grayed out. Available flags are:
I/O card fault detected If set, this flag indicates that a low-level hardware fault has occurred. Report
to your supplier.
Incorrect I/O card found If set, this flag indicates that the I/O card fitted is of the wrong type.
I/O card in use This flag is set when two devices are attempting to use the same I/O card.
Sensor connection error This flag is set when the sensor hardware detects a physical connection
fault.
Sensor failed to read input signal If set, the sensor has failed to read the state of the flow, flush or
process signal.
Sensor flow alarm active This flag is set if a low/no flow condition is reported by the flow signal.
Sensor data alarm active
When the sensor readings trigger a data alarm, this flag is set.
I/O card configuration failed This flag is set if the I/O plugin card fails to respond correctly. Contact
your supplier for advice.
Modbus communications error This flag is set when a Modbus exception, timeout or checksum
failure occurs. If clear, communication with the sensor is normal.
Device identifier mismatch If set, this flag indicates that the sensor connected to the Modbus input
is not responding as expected. Check that the correct sensor is connected.
High humidity alarm This flag is set if the UV254 Sensor reports that the humidity in the enclosure is
too high.
Leak detected alarm This flag is set if the UV254 Sensor detects a leak in the enclosure.
Lamp high alarm This flag is set if the UV254 Sensor reports the UV lamp output is too high.
Lamp low alarm This flag is set if the UV254 Sensor reports the UV lamp output is too low.
Lamp failure alarm This flag is set if the UV254 Sensor reports the UV lamp has failed.
Sensor failure alarm This flag is set if the UV254 Sensor reports a system fault.