ABB 4690 - Page 25

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