TurbiTechw² LR Instruction Manual
9.4 Calibration Span
To calibrate the sensor span, switch off the inlet hose and remove the cleaning module. The cleaning
module is located in the top of the measuring cell and locates with a screwed collar. A location peg
makes sure the module is correctly aligned during replacement. When replacing the module ensure
the O-ring remains correctly situated.
A dry clean cloth is required to carefully wipe around the inside of the
chamber to remove any moisture and fouling. Fill the chamber with
calibration standard (Formazine).
From the 7300w² Monitor, navigate to the Calibration menu as follows-
•
Press
to show the “MAIN MENU”.
•
Select “MEASUREMENT CONFIG” by pressing
and press
•
Select “Colour” by pressing
and press
to accept.
•
Select “SET CAL” by pressing
and press
to accept.
•
The SET CAL screen will be displayed, press
to move on.
•
The SET CAL set calibration value screen will be displayed.
•
Enter the value for the calibration standard (Default is 10NTU).
Press
or
to move the cursor below the digit to be changed.
Press
or
to increase or decrease the digit, and press the
to accept the value.
•
The SET CAL calibration screen will now be displayed.
•
Wait for the value to stabilise, then press
to accept.
•
Press
several times to return back to the DISPLAY screen.
•
Calibration span is now complete.
9.5 Span Calibration using the Take Sample Routine
The Take Sample and Sample Result menus are provided to allow calibration to be carried out
retrospectively based upon stored information. An example of this is where the value of the calibration
solution is not known at the time of calibration and an estimated value was used to set the instrument
span. The take sample menu is used to store the sensor signal of the calibration solution for later use.
The Set Zero process described above should be carried out before using the Take Sample routine.
225769IM - Issue - 05 Issue Date 30/04/2019
Page 23 of 34
M:01 CONFIG
M:01 Info
M:01 Title
M:01 Set Zero
M:01 Averaging
M:01 Remove
M:01 Units
M:01 Set Cal
M:01 SET CAL
CALIBRATE MEASUREMENT
M:01 Turbidity
S:01 TurbiTechw
2
LR (0-30)
SN: 400001
Press OK to contiue or MENU to Exit
M:01 SET CAL
10.00 NTU
Use to set value
Press OK to accept
Press MENU to cancel
M:01 SET CAL
Insert calibration standard into cell
and wait for measurement to stabilise
Press OK to contiue or MENU to Exit
10.02
NTU
