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AMI Phosphate-II
Product Description
2.
Application
Measuring
principle
Programmable
Measuring
Intervals
Signal
Outputs
Relay
8
Product Description
This manual describes the functions of the analyzers:
AMI Phosphate-II
AMI Phosphate-II B
Both analyzers are complete monitoring systems for the automatic
continuous measurement of ortho-Phosphate. ortho-Phosphate
can be found in many applications like corrosion protection in sani-
tary systems and boilers or as additive to detergents. On-line mea-
surement is used in quality control of drinking water, waste water
plants and thermal power 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
concentration of the sample and is measured photometrically at
815 nm.
The duration of a measuring interval can be set to:
10 min (not available if "2 Channels" is selected)
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 with the same specifications as option.
(Only possible if no communication interface is used.)
Two potential-free contact programmable as limit switches for mea-
suring values, controllers or timer for system cleaning with auto-
matic hold function.
Maximum load: 1 A/250 VAC
0/4–20 mA
510
A-96.250.641 / 290312
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