Anton Paar L‐Dens 3300 Density Sensor

• This device has no commands and asynchronously sends readings.
• Which readings it sends depends on which application is loaded onto the device, at ISIS we use the Live Raw Data application at the moment with room to expand, meaning it is safe to assume the device will send data in the following format T= 24.74 <°C> D= 0.8 <kg/m³><\r><\n>; a temperature of the fluid and the density of the fluid in degrees Celsius and kilograms per metre cubed respectively.
• If a different application is loaded then the temperature and density PVs sit in INVALID alarm.
• To account for the device's asynchronous behaviour we use I/O interrupt AI records which trigger when the input it is pointing to changes.
• If 10 seconds pass and no messages are received in the expected format then the temperature and density PVs go into INVALID alarm.

The IOC to facilitate use of this was implemented under https://github.com/ISISComputingGroup/IBEX/issues/8413.

Baud = 9600

Data = 8

Parity = None

Stop = 1

The manual can be found at \\ISIS\Shares\ISIS_Experiment_Controls\Manuals\AntonParr_L-Dens3300. (With the operator and admin pass codes on page 16)