10 OI/ATS430–EN Rev. H
| Aztec ATS430 | Turbidity sensor
6 Calibration
This section describes how to calibrate the sensor and involves
measuring the sensor's sensitivity to turbidity and / or
suspended solids by exposing the sensor to samples of known
turbidity or suspended solids content.
Calibrations are initiated via the
Cal
prompt displayed on the
main page or via the
Operator
pages or
Calibrate
and
Advanced
menu items on the
Access Level
page – refer to transmitter
Operating instructions OI/AWT440-EN for all transmitter menu
options.
6.1 Calibrate menu
IMPORTANT (NOTE)
— Do not perform a calibration until the sensor and
transmitter are installed and ready for operation.
— Before removing the sensor for calibration
purposes, set the currents outputs and alarms to
Hold
(enabled via the
Operator Menu / Manual Hold
function).
Used to calibrate the sensor.
Access to the
Calibrate
menu is via the
Calibrate
and Advanced
levels only.
Note
. During calibration, current outputs and alarms are set to
Hold
automatically if
Hold Outputs
is enabled (see below).
– Refer to Section 6.2, page 11 to perform a sensor verification.
– Refer to Section 6.3, page 13 to perform a turbidity calibration.
– Refer to Section 6.4, page 17 to perform a suspended solids calibration.
Menu
Calibrate
Exit
Select
Menu
Comment
Default
S1(to 4) : TURB TSS
Select the turbidity sensor to calibrate.
Sensor Verification
Turbidity Calibration
1-Point Cal
General purpose span calibration.
2-Point Cal
Calibration for better accuracy.
Suspended Solids Cal
1-Point Cal
General purpose span calibration.
2-Point Cal
Calibration for better accuracy.
Sample Collection
Sample collection in progress.
Collection Complete
Sample collection completed.
Manual Coefficient
Enter the coefficient that relates the turbidity of the sample
to its suspended solids content.
Restore Defaults
Restores default values to their factory settings.
Hold Outputs
Enable / disable the
Hold Outputs
function. If enabled, the
current outputs and alarm functions are held during calibrations.
Enabled
