AMI Turbitrace
Maintenance
A-96.250.131 / 050220
43
6.6. Cleaning the Test Unit
NOTICE:
To avoid scratches on the surface of the test unit do
not use scrubbing materials.
After each verification dry the test unit with a soft, clean tissue.
6.7. Calibration
The AMI Turbitrace is factory calibrated with formazine and does
not require a recalibration. With this calibration the zero-point is set,
to compensate the signal drift due to a film building on the measur
-
ing cell window.
For this purpose, the solenoid valve [A] is switched over and the
sample is led through the zero point filter [B].
NOTICE:
When measuring turbidity in pure and ultrapure water
it is important to start a zero-point calibration periodically. This
has very little influence on the slope.
