Pyxis 50661, User Manual

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6.5 Diagnosis Screen
After the device has been calibrated and installation has been completed, to check diagnosis, click on Diag-
nosis . When in the Diagnosis screen you can view the Diagnosis Condition of the device. This feature may
be used for technical support when communicating with service@pyxis-lab.com .
To preform a Cleanliness Check, first select the Diagnosis Condition which defines the fluid type that the
ST-500 Series sensor in currently measuring, then click Cleanliness Check . If the sensor is clean, a green
Clean message will be shown. If the sensor is severely fouled, a red Dirty message will be shown. In this
case, follow the procedure in the Methods to Cleaning the ST-500 Series Sensor section of this manual.
Figure 16.
7 Outputs
7.1 4–20mA Output Setup
The 4–20mA output of the ST-500 and ST-500SS sensor is scaled as:
• PTSA:
– 4 mA = 0 ppb
– 20 mA = 300 ppb
The 4–20mA output of the ST-500RO sensor is scaled as:
• PTSA:
– 4 mA = 0 ppb
– 20 mA = 40 ppb
7.2 Communication using Modbus RTU
The ST-500 Series sensor is configured as a Modbus slave device. In addition to the ppb PTSA value, many
operational parameters, including warning and error messages, are available via a Modbus RTU connection.
Contact Pyxis Lab Customer Service (
service@pyxis-lab.com ) for more information.
ST-500 Series User Manual service@pyxis-lab.com | +1 (866) 203-8397 15