Camlab CW8200, Руководство пользователя

Страница: 20 / 48

18
2.3.5 User-calibration
2.3.5.1 When to calibrate
The turbidimeter was adjusted at the factory with Formazin Primary Standard and does not
require user-calibration before use.
As the electronical and optical design of this instrument provides long-term stability the
need for frequent calibration is minimized. Perform calibration with T-CAL every 3 month
or if required more often.
2.3.5.2
Calibration Procedure
Note
: Calibration may be canceled at any time by pressing the [ESC] key (not during a current
Count-downs). The latest Calibration persist.
Press the [Cal] key to start the calibration.
Place the <0.1 NTU Standard in the sample chamber
making sure that the marks aligned. Place the cover on
the instrument.
Press [Read / Avg] key.
The Count-down starts.
After the Count-down is finished the reading starts
automatically.
Place the 20 NTU Standard in the sample chamber
making sure that the marks aligned.
Place the cover on the instrument.
Press [Read / Avg] key.
The Count-down starts.
After the Count-down is finished the reading starts
automatically.
Place the 200 NTU Standard in the sample chamber
making sure that the marks aligned.
Place the cover on the instrument.
Press [Read / Avg] key.
The Count-down starts.
After the Count-down is finished the reading starts
automatically.
Place the 800 NTU Standard in the sample chamber
making sure that the marks aligned.
Place the cover on the instrument.
<NTU adjustment>
standard:
<0,1 NTU
Count-Down
1:00
Cal
Read/
Avg
<NTU adjustment>
standard:
20 NTU
Read/
Avg
Count-Down
1:00
<NTU adjustment>
standard:
200 NTU
Count-Down
1:00
Read/
Avg
<NTU adjustment>
standard:
800 NTU