PNET Operators Manual
PNET -OP-2022
Chapter 8
Sensor status and parameter status
18
8
Sensor status and parameter status
All rheonics sensors (SRV, SRD, DVP, DVM) for inline viscosity and density monitoring have inbuilt status.
These status bits can be used over digital communication channels to understand when the sensor is
operating correctly and when there is an issue.
8.1
Sensor Error Status
The sensor status can take any of the following values:
Bit
Hex
Name
Comment
Bit 0
0x0001 PLL frequency
mismatch
The PLL frequency does not match the sensor frequency.
Derived from the ASB string (E10)
Bit 1
0x0002 PLL not locked
The PLL is not locked. Derived from the ASB string (E01)
Bit 2
0x0004 PLL lock incorrect
The PLL has locked on a wrong frequency. Derived from
the ASB string (E02)
Bit 3
0x0008 ASB communication
error
Issues with sensor electronics
Bit 4
0x0010 Temperature sensor
failed
The temperature sensor has failed. Derived from the ASB
string if temperature is -273.0
Bit 5
0x0020 Sensor too hot
If temperature is above the hardcoded physical
temperature limit.
Bit 6
0x0040 ASB communication
error
Communication issue between two electronics board in
the SME
Bit 7
0x0080 Serial Changed
Bit 8
0x0100 Status not clean
Sensor is not clean (only SRV)
Bit 9
0x0200 Status in Air
Determines if sensor is in air
Bit 10
-15
Unused
Table 2. Sensor error status bit code and description.
