7.5
Setting Screen
From the
Setting
screen, you can set the
Reading Interval
, the
Metal Selection
, the corrosion MPY value
for 20 mA, the pitting value for 20 mA, and two smoothing factors. Be sure to click
Apply Settings
to save
any changes.
Figure 20.
8
Outputs
8.1
4–20 mA Output Setup
The default setting for the steel general corrosion rate 4–20 mA output is 20 mA = 50 MPY and 4 mA = 0
MPY. The default setting for the steel pitting index is 20 mA = 100 Index and 4 mA = 0 Index. The user can
alter the 4–20 mA scale as desired by filling the fields shown in Figures 15 and 20.
As outlined in the
Test Metal Electrode Default Settings
, each pre-loaded metallurgy will offer a default
4–20mA scale for both general and localized corrosion. User may adjust as desired.
8.2
Communication using Modbus RTU
The CR-301 can be configured as a Modbus slave device. In addition to the general corrosion rate and lo-
calized corrosion index, many operational parameters, including warning and error messages, are available
via a Modbus RTU connection.
Contact Pyxis Lab Customer Service (
) for more information.
9
Sensor Maintenance and Precaution
For best performance, severely corroded sensor metal electrodes should be replaced. Any deposit on the
sensor body and near the base area of the metal electrode should be cleared. Minor corrosion product
deposit on the electrode surface is acceptable. Non-corrosion product deposit such as calcium carbonate
scale should be removed. The sensor should not be left in stagnant water for a long period unless measuring
corrosion rate of the metal in such condition is the purpose for evaluation.
CR-301 User Manual
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Summary of Contents for 51021
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