10 Sensor Setup; 2-Electrode Conductivity - ABB AWT420 Commissioning Instructions

AW T4 2 0 | U N I V E R S A L 4 - W I R E , D U A L- I N P U T T R A N S M I T T E R | C I/A W T4 2 0 - E N R E V. B

10 Sensor setup

2-electrode conductivity

Menu Comment
Tag
Enter an alphanumeric sensor tag (16 characters maximum) to identify the sensor on the
Operator Pages .
Measurement Type Select measurement type:
• Conductivity/Concentration/Resistivity
Note. If a change is made the I/O sources are reset.
Note . The following menus are displayed only if measurement type = Conductivity
Conductivity Unit Select the conductivity units:
• mS/cm/μS/cm
Cell Constant
Enter the cell constant of the measuring cell used –
see the relevant conductivity cell manual.
Range High Set the span value used in Chart and Bargraph views.
Range Low Set the zero value used in Chart and Bargraph views.
Note . The following menus are displayed only if measurement type = Concentration
Cell Constant
Enter the cell constant of the measuring cell used –
see the relevant conductivity cell manual.
Concentration Unit Select the concentration units:
• None(Blank)/ppm/mg/l/ppb/μg/l/%/Custom
Custom Units Note. Displayed only if concentration units = Custom
Enter an alphanumeric string (6 characters maximum) for the custom (user defined) concentration units.
Conc . Curve Table Set the user defined concentration curve using the 6-point linearizer table
(concentration against conductivity).
Range High View the span value used in Chart and Bargraph views.
Range Low View the zero value used in Chart and Bargraph views.
Filter Type Select the signal filtering type:
• None/Low/Medium/High
Temp . Comp . Type Set the type of temperature compensation:
• Manual/Automatic/None
Manual Temperature Note . Displayed only if temperature compensation type = Manual
Enter the temperature of the sample within the range –10.0 to 120.0 °C.
TC Curve Note . Not displayed only if temperature compensation type = None
Set the temperature compensation characteristic required:
• TC Coeff./Standard KCl/UPW (Low TC)/UPW (High TC)/Pure H20 (Neutral)/
Pure H2O (Acid)/Pure H2O (Base)/NaOH/HCl/NaCl/NH3/User Defined
User Def . TC Curve Note . Displayed only if temperature compensation curve = User Defined
Set the user defined temperature compensation curve using the six point linearizer table (% against °C).
TC Coefficient Note . Displayed only if temperature compensation curve = User Defined
Enter the temperature coefficient (α x 100) of the solution (0.01 to 5.00 %/°C).
If unknown, the temperature coefficient (α) of the solution must be calculated – see page 72.
Sensor Diagnostics
Polarisation
Detect excessive polarisation condition:
• Enabled/Disabled
Out Of Solution Detect Out Of Solution condition:
• Enabled/Disabled
Reset To Defaults Select to reset all Sensor Setup parameters to their default values.
Conductivity cell constant
0.01
0.05
0.10
1.00
Conductivity measuring range
0 to 200 µS/cm
0 to 1000 µS/cm
0 to 1 mS/cm
0 to 2,000 µS/cm
0 to 2 mS/cm
0 to 20,000 µS/cm
0 to 20 mS/cm
27
Default
TAG1
Conductivity
μS/cm
1.00
Cell constant dependent
– see table below
0
N/A
N/A
N/A
N/A
N/A
N/A
None
Automatic
25.0 °C
TC Coeff
N/A
2.00 %/°C
Disabled
Disabled