Salinometer - Requirements - Alfa Laval
Salinometer - Requirements - Alfa Laval
Salinometer - Requirements - Alfa Laval
1
SALINOMETER
Salinometer
1 Description
The salinometer is used in combination with a conductive electrode to measure and
supervise the salinity of feed water. Figure 1 illustrates the control device and electrode.
The control device is provided with indication LED’s for monitoring the salinity level
and two LED’s for alarm purpose. The measuring range as well as the adjustable alarm
range is 0 – 100 ppm (sea salt). The alarm limit can be adjusted by means of the set
screw located on the front panel. The alarm limit is indicated by a flashing LED in the
indication LED row. If the salinity level exceeds the alarm limit the alarm LED’s start
flashing.
During commissioning it is not necessary to carry out any adjustments of the equipment
except setting the alarm limit. When the power is turned on, the salinometer will per-
form a self test. This calibration will take approximately 5 sec.
Indication
PG 13.5
LEDs
Gasket
Gold-plated
electrodes
Terminals
Figure 1 sl700g_bx3194020en.wmf
Note: The electrode is totally sealed and must not be opened. The guarantee is
void if opening of the electrode is attempted.
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SALINOMETER
2 Installation
The conductive electrode may be installed vertically, horizontally, or radial inclined.
However, the electrodes must be constantly submerged in feed water. Figure 2 illus-
trates the salinity system.
Condensate
Hot well
T-piece
Electrode
Cable lenght 2.5 m
Junction box
(not Alfa Laval supply)
Cable lenght max. 200 m
(not Alfa Laval supply)
PI PI
Salinometer
PS (mounted in
power panel)
To boiler Feed water
PI PI
pumps
Figure 2 sl700d_bx3198720en.wmf
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SALINOMETER
2.1 Wiring
The wiring should be carried out in accordance with the diagram shown in Figure 3.
Wiring diagram
Brown
Shield
Black
Grey
Blue
Junction box
(not Alfa Laval supply)
Brown
Shield
Black
Grey
Blue
Figure 3 sl700i_ax3115920en.wmf
The mains supply of the control device is 98-122 VAC or 196-244 VAC, 50-60 Hz.En-
sure that the mains supply is secured against over current by a fuse (max.100mA).
The recommended cable for the conductive electrode is a multi-screened twin twisted,
where the screen is connected to connector 14, one pair is used for connector 11+12,
and the other pair is used for connector 13+15. The length of the cable must not exceed
200 m.
Important: The cable may not be placed together with power cables, as this will
cause damage to the gold plating on the electrodes.
3 Maintenance
The accuracy of the salinometer equipment is very dependent on the electrodes are
kept clean. The electrodes should be taken out and cleaned at least once a week. Use
only a clean and soft cloth. When cleaning the electrodes it is important that oil or other
chemicals do not pollute the electrodes. Any pollution will immediately result in an
inaccurate measurement of the salinometer.
Note: Avoid damaging the gold plating.If the gold plating is damaged, the con-
ductive electrode must be replaced.
The expected longevity of the conductive electrode is approximately 1.2 – 2.2 years.
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SALINOMETER
4 Troubleshooting
Table 1
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SALINOMETER
2 Electrode unit with damaged The unit is ready for exchange. We recommend replacement of
gold platin the electrode unit every 18 months depending on the condition of
the gold plating.
Send a request for a new sparepart.
3 Electrode unit with serious The cable to the Salinometer sensor is mounted near some high
corrosion/erosion. power cables. The induction from the high power cables gives a
One of the sensors has almost high voltage on the sensor cable and the sensor. A high voltage
disappeared. on the sensor will cause corrosion faster than normal.
Relocate the cables and send a request for a new sparepart.
4 Electrode unit with crack in Under normal circumstances the electrode unit is covered by war-
the white moulding. ranty (as long as the electrode unit is not tampered with). When
The gold platin is in good discovering an electrode units with this fault please send following
condition. information to your supplier:
1. Serial number of the salinometer
2. Photos of the electrode unit, showing the crack and the golden
plated electrodes
3. Name of the vessel
4. Your reference no.
Table 2
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