Pyxis 51021, Руководство пользователя

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5.2 Default Sensor Settings
The default 4–20 mA current outputs for mild steel are scaled as:
• 4 mA = 0 MPY or 0 localized corrosion index
• 20 mA = 50 MPY (general corrosion)
• 20 mA = 100 Index (localized corrosion)
The sensor is configured to measure the corrosion of mild steel by default. A default alloy factor and output
scales for both general and localized corrosion will be assigned by uPyxis. These values may be altered by
the user if desired. For measuring the corrosion rate of steel, the user just needs to scale 20 mA = 50 MPY
in the controller. Please refer to the
Test Metal Electrode Default Settings table for a list of all metallurgies
and preprogrammed default alloy factors and 4–20mA output scales.
5.3 Confirm 4–20mA Output to MPY using the Calibration Check Caps
The CR-301 is provided with one 2.0 MPY and one 0.1 MPY- calibration check/verification caps. These caps
are designed to generate a known MPY value when connected to the uPyxis APP and when the sensor is
configured with the uPyxis Default Settings assigned. These corrosion verification caps will work regardless
of which metallurgy is applied to the corrosion sensor and simply establish a known electrical current to
“simulate’ a specific MPY value. When the controller is scaled to match the uPyxis default settings, these
caps will generate a “TEST” signal to confirm the controller reads properly.
*
NOTE
*
Please note that when conducting a test with the calibration verification caps, the
user should allow up to 15 minutes for the final corrosion value to stabilize.
Follow the steps below to configure the controller’s 4–20 mA range:
1. Install two new test electrodes (example Steel or Copper)
2. Plug the sensor to the calibration appropriate calibration check cap and wait for at least for 15 minutes
to allow the sensor to carry out three complete measurements (Figure ?? ).
3. Confirm the controller’s analog input 4–20mA scale is programmed correctly so that the corrosion
rate value on the controller matches with the value marked on the calibration cap.
Figure 11. Plug the sensor into the calibration check cap
CR-301 User Manual service@pyxis-lab.com | +1 (866) 203-8397 13