Rdo; Turbidity/Suspended Solids - ABB AWT420 Operating Instruction

54 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 | O I/A W T4 2 0 - E N R E V. B
...14 Sensor setup

RDO

Menu Comment
Tag
Enter an alphanumeric sensor tag (16 characters maximum) to identify the sensor
on the Operator Pages.
Measurement Type Select the required probe type:
• Dissolved Oxygen/% Saturation
Note. If a change is made the I/O sources are reset.
Units
Select the measurement units:
• mg/l/ppm
PV Resolution Select the PV Resolution:
• Normal/High
Range High Set the span value in Chart and Bargraph views.
Range Low
Set the zero value in Chart and Bargraph views.
Filter Type Select the signal filtering type:
• None/Low/Medium/High
Salinity Unit Select the required salinity units:
• PSU (Practical Salinity Units) or ppt (parts-per-thousand).
Salinity Correction
Required when monitoring water containing high quantities of dissolved salts:
• enter the required value between 0 and 42 Practical Salinity Units (PSU).
• leave at the default value of 0 PSU if salinity correction is not required.
Pressure Unit Select the required barometric pressure units:
• mBar/mmHg
Barometric Pressure
Barometric pressure compensation.
Set the local barometric pressure to 506 to 1114 mbar (380 to 835 mm/Hg).
If the barometric pressure is unknown, leave at the default sea-level value of
1013 mbar (760 mm/Hg).
Reset To Defaults Select to reset all Sensor Setup parameters to their default values.

Turbidity/Suspended solids

Menu Comment
Tag Enter an alphanumeric sensor tag (16 characters maximum) to identify the sensor on the
Operator Pages .
Measurement Type
Select measurement type:
• Turbidity/Suspended solids
Note. If a change is made the I/O sources are reset.
Turbidity Units Select the turbidity units
• NTU/FNU
TSS Units
Select the total suspended solids units
• mg/l/ppm
for readings above 1000 mg/l (ppm) the units change automatically to g/l (ppt).
Range High Set the span value used in Chart and Bargraph views.
Range Low Set the zero value used in Chart and Bargraph views.
Filter Type Select the signal filtering type:
• None/Low/Medium/High
Note . The following menus are displayed only if the sensor has a wiper fitted.
Wiper Clean Freq . Set the interval between cleans:
• Off/15 mins/30 mins/45 mins/1 to 24 Hours
Next Clean Note. Displayed only if a wiper clean frequency has been configured
Set the time for the next wiper clean to occur.
Reset Wiper Lifetime Use to restart the wiper lifetime counter after wiper replacement.
Reset To Defaults Select to reset all Sensor Setup parameters to their default values.
Default
TAG1
Dissolved Oxygen
ppm
Normal
50 ppm (200%)
0
None
PSU
0 PSU
mBar
1013 mbar
N/A
Default
TAG1
Turbidity
NTU
mg/l
4000 NTU
0
None
Off
N/A
N/A