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AMI Phosphate-II
Product Description
2.
Application
Measuring
principle
Programmable
Measuring
Intervals
Signal
Outputs
Relay
10
Product Description
The AMI Phosphate-II is a complete monitoring system for the auto-
matic continuous measurement of ortho-Phosphate. ortho-Phos-
phate can be found in many applications like corrosion protection in
sanitary systems and boilers or as additive to detergents.
The AMI Phosphate-II is used in quality control of drinking water and
waste water plants.
The measurement is based on the molybdenum blue colorimetric
method according to APHA 4500-P E. and on EN ISO 6878. When
the reaction product of o-phosphate with ammonium-molybdate is
reduced with ascorbic acid, the intensely colored molybdenum blue
is formed. The color intensity is proportional to the o-phosphate con-
centration of the sample and is measured photometrically at 815 nm.
The duration of a measuring interval can be set to:
10 min
15 min
20 min
30 min
Independent of the programmed measuring interval, the measure-
ment time of a sample takes 7 minutes.
Two signal outputs programmable for measured values (freely scal-
able, linear or bilinear) or as continuous control output (control pa-
rameters programmable).
Current loop:
Maximal burden:
Third signal output available as an option. The third signal output can
be operated as a current source or as a current sink (selectable via
switch).
Two potential-free contact programmable as limit switches for mea-
suring values, controllers or timer for system cleaning with automatic
hold function. Both contacts can be used as normally open or nor-
mally closed.
Maximum load: 1 A/250 VAC
0/4–20 mA
510 Ω
A-96.250.641 / 290121
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