VAF instruments OILCON MARK 6M, Technical Manual

Page: 84 / 175

83
65. Press the <ACK> key to stop the alarm. The MCU returns back to “idle mode”.
66. Press the <SAMPLE> key to start the “sample mode”
67. Check that the ship’s speed, flow rate and oil concentration are all displayed on the MCU
Wait for the overboard discharge valve to open. This is indicated by the change of POS:
from “C” to “O”.
68. Regulate the cargo pump speed and back pressure to obtain a flow rate equivalent to
approximately 50 % of the rated capacity of the flowmeter. Check the accuracy of the
flowmeter against ullage readings or cargo pump characteristic curves.
69.
Only in case of two flowmeters:
Test the underrange alarm by reducing the flow. Shut the
overboard valve and the recirculation valve will go open. The alarm will be triggered.
Increase the discharge flow and press <ACK> to stop the alarm.
70. Press the <MORE> key and accordingly the <SELFTEST> key to select the "selftest mode”.
The MCU screen shows the most recent alarms.
Press the <BUZZER> key to test the buzzer alarm sound.
71. Press the <BACK> key to return to “sample mode”.
72. Press the <STOP> key to select “idle mode”.
73. Stop the cargo pump.
74. Turn the key switch on the MCU to <CONSOLE> position and check the manual control of
the overboard discharge valve and slop tank valve from the cargo control console.
75. Turn the key switch on the MCU to <CONTROL> and check that the
manual control
of both
overboard discharge valve and slop tank valve from the cargo control console is
not
possible
.
76. Press the STOP key to select the “shutdown mode”.
Check operation of SHUTDOWN flushing cycle as follows:

The valve V10 and valve V11 open.

The sample pump runs.

After 2 minutes valve V11 should close.

The window wash pump will operate for a approximately 12 seconds.

After a further 2 minutes valve V10 will close and the pump will stop.

The system is now in a STANDBY mode.
77. After the test, take the data files from the MCU and check the data files are ok.
78. Inspect the system for evidence of any leaks.