34
NC IN-OUT NO
NC IN-OUT
NO
SV4
SV5
…8
MAINTENANCE
9
SPECIFICATION
8.7
Color Compensation Solenoid Valves
There is no maintenance required for these valves (SV4 and
SV5 – see Fig. 1.1). If they have been removed from the base
for any reason, please refer to Fig. 8.6 for the correct
orientation on reassembly.
Installation Information
Install the monitor where the following conditions can be
maintained:
Sample Flow
5 to 750 ml min
–1
Suspended Solids
<10 mg l
–1
, <60 microns
Sample Connections
Inlet
6 mm, flexible hose connection
Outlet
9 mm, flexible hose connection
Ambient Temperature
5 to 40
C
Sample Temperature
5 to 55
C
Reagent
Solutions
Consumption of the reagent is
10 liters per five weeks.
Calibration Solutions
A solution of one liter is required of
concentration and formulation suitable
for the particular range and application.
Enclosure Dimensions
Height
740 mm
Width
540 mm
Depth
240 mm
Weight
25 kg
Power
Supply
110 to 120 V or 220 to 240 V,
50/60 Hz, 100 VA.
Isolation Voltage
Input, output and power supply
1.5 kV.
Power Supply Tol6% to –20%
Relay Contacts – Single Pole Changeover
Rating
250 V a.c.
250 V d.c. maximum
3 A a.c.
3 A d.c. maximum
Loading (non-inductive) 750 VA
30 W maximum
(inductive)
750 VA
3 W maximum
Degree of Protection
Electronics Section – IP65.
Liquid Handling – Case IP31,
Critical internal components IP65.
General Specification
Range
0 to 60 mg l
–1
as PO
4
3–
0 to 20 mg l
–1
as P
Color Compensation
The sum of reacted phosphate plus
Limit
sample color must be
60 mg l
–1
as
PO
4
3–
or 20 mg
–1
as P
Accuracy
<
0.05 mg l
–1
as P or
<
0.15 mg l
–1
as PO
4
3–
or
<
5%, whichever is the greater.
Reproducibility
<
0.05 mg l
–1
as P or
<
0.15 mg l
–1
as PO
4
3–
or
<
5%, whichever is the greater.
Maximum Current Output
Scale Expansion
0 to 3 mg l
–1
as PO
4
3–
0 to 1 mg l
–1
as P
Fig. 8.6 Orientation of Valves SV4 and SV5
