Salinometers

Question 1

What is the purpose of a salinometer?

Answer 1

To give a visual indication of the presence of salt water of certain engine room machinery.

Question 2

How do you test alarm and relay settings on a salinometer panel ?

Answer 2

1. To carry out an insulation test first remove the probe from the retractable valve assembly.
2. Connect 250 volt metrohm to the connection on the side of the test meter
3. Using the megohm test facility check the probe assembly
4. The reading should be greater than 1 megohm, if not the probe needs replacing.
5. With the salinometer probe removed from the circuit, substitute the salinometer test meter in its place
6. Using the potentiometer on the front of the test meter slowly increase until the salinometer monitoring system goes into warning, make a note of the reading.
7. Checking with the system BR for the correct alarm setting. Adjust RV1 until the correct alarm setting is achieved using the salinometer test meter.

Question 3

What 3 factors can affect a salinometer?

Answer 3

A. Distance between the electrodes
B. Amount of salt in the water.
C. Temperature of water

Question 4

When cleaning a salinometer what consideration should be made?

Answer 4

Cleaning of the probe assembly should be carried out only with the recommended chemicals laid down in the BR or local orders. Abrasive materials be used. This will only erode away the coating on the electrode and so decrease their efficiency and reduce the projected life of the probe.

Question 5

What is fitted to water production units to prevent high salinity water entering tanks and what happens on failure of electrical supplies?

Answer 5

A dump valve Solenoid arrangement is therefore fitted, when a pre set contamination level is reached and warning relay energises. The failure of an electrical supply to a salinometer system will cause the springs to operate the solenoid valves. The arrangement is therefore made to fail safe to the dumping condition.