ABB 4690 User Manual page 25

4690 Series
Turbidity systems
NTU value Indication
Fig. 7.5 Dry Calibration Standard for Low Range Sensors
NTU value Indication
Fig. 7.6 Dry Calibration Standard for High Range Sensors
IM/4690–EN Rev. A
Zero NTU Indication
Zero NTU Indication
Zero NTU
NTU value
Indication
Indication
Fig. 7.7 Inserting Dry Standard
7 Calibration
Locating
Lug
Optical
Emitter
Optical
Receiver
23