ABB AWT420 Operating Instruction Download

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AW T4 20 |

U N I V ER S A L 4 - W I R E , D UA L- I N P U T T R A N SM I T T ER | O I/AW T4 2 0 - EN R E V. B

14 Sensor setup

2-electrode conductivity

Menu

Comment

Default

Tag

Enter an alphanumeric sensor tag (16 characters maximum) to identify the sensor on the

Operator Pages

TAG1

Measurement Type

Select measurement type:
• Conductivity/Concentration/Resistivity

Note

. If a change is made the I/O sources are reset.

Conductivity

Note .

The following menus are displayed only if measurement type =

Conductivity

Conductivity Unit

Select the conductivity units:
• mS/cm/μS/cm

μS/cm

Cell Constant

Enter the cell constant of the measuring cell used –
see the relevant conductivity cell manual.

1.00

Range High

Set the span value used in

Chart

and

Bargraph

views.

Cell constant dependent

– see table below

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.

N/A

Concentration Unit

Select the concentration units:
• None(Blank)/ppm/mg/l/ppb/μg/l/%/Custom

N/A

Custom Units

Note

. Displayed only if concentration units =

Custom

Enter an alphanumeric string (6 characters maximum) for the custom (user defined) concentration units.

N/A

Conc . Curve Table

Set the user defined concentration curve using the 6-point linearizer table
(concentration against conductivity).

N/A

Range High

View the span value used in

Chart

and

Bargraph

views.

N/A

Range Low

View the zero value used in

Chart

and

Bargraph

views.

N/A

Filter Type

Select the signal filtering type:
• None/Low/Medium/High

None

Temp . Comp . Type

Set the type of temperature compensation:
• Manual/Automatic/None

Automatic

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.

25.0 °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

TC Coeff

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).

N/A

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.

2.00 %/°C

Sensor Diagnostics

Polarisation

Detect excessive polarisation condition:
• Enabled/Disabled

Disabled

Out Of Solution

Detect

Out Of Solution

condition:

• Enabled/Disabled

Disabled

Reset To Defaults