Chemtrac HydroAct 4, User Manual

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3.1 PC6 Particle Counter 49
Received and transmitted byte and packet counts are displayed along with error counters. Error
counters for packets received with checksum errors, timeouts and exception packets generated are
recorded. Counters are unsigned 32-bit and will overflow back to 0 if they reach 4,294,967,295.
Alternatively, all counters can be manually reset by pressing the “Reset” button.
3.1.5.9 Sensor Status
Options → Diagnostics → Sensor Status
This option displays a live updating reading (approximately every 5-10 seconds) of the sensor cell
voltage and laser current). This information can be valuable for troubleshooting purpose should a
problem arise with the PC6 Particle Counter.
3.1.5.10 Alarms and Thresholds
Alarms are the means by which values obtained from sensors cause visible, audible or physical actions
to occur. Alarms are not to be confused with relays. An alarm in a HydroAct 4 unit will create a visible
bar across the top of the screen and sound a buzzer. One flow alarm per sensor and two data alarms
per parameter are available.
Thresholds are similar to alarms except that they are events that are supposed to occur and
therefore will not cause the instrument to go into “Alarm”. Thresholds are most frequently used to
trigger relays to cause something to happen when a parameter reaches a value.
To access the alarm and threshold configuration select:
Options → Alarms & Thresholds → Parameter Name
The display has a tab for each alarm and threshold. Navigate to the tab using the right and left
buttons indicated on the bottom of the display or navigate through the settings using the up and down
arrows. Options are: