VAF instruments OILCON MARK 6M, Техническое руководство

Страница: 105 / 175

104
15.11.2.1 No flow
Probable causes Action
1
No fresh water supply.
(low discharge pressure < 2 bar
during flushing).
(< 0.2 MPa during flushing).

Check if the 3-phase power supply is switched on.

Check the fuses of the 3-phase power supply. the
water supply to the pump.
2
No sample water supply.
(low discharge pressure < 2 bar
during sampling).
(< 0.2 MPa during sampling). 
Check if the cargo/stripping pump is ON.

Check if the discharge line is filled with water.

Check if the manual valve of the sample probe is open.

Check if the pneumatic valve in the sample line is open.

Check if the manual valve in the sample inlet of the skid
assembly is open.
3
Blockage in outlet line.
(high discharge pressure > 10
bar).
(>1 MPa). 
Check if the manual valve in the sample outlet of the
skid assembly is open.

Check if the manual valve on the discharge to the slop
tank is open.
4
Flowrate through the monitor too
low

Check the flowrate through the monitor.

Read the skid flow from the display during FORWARD
FLUSH or SMAPLE mode and ensure the flow is
between
450 - 550 l/h.

The flowrate can be adjusted by means of the needle
valve on the outlet of measurement cell.
5
Malfunction of the flow sensor.

Check the electrical connections on the flow sensor.

Check the connections between the flow sensor and
the EPU.

Check the function of the flow sensor.
NOTE:
During commissioning the flowrate through the monitor is set to between 450 and 550
l/hour. The “no-flow” alarm is activated at flows less than 240 litres per hour.
NOTE:
During back flush, the “no flow” alarm is inhibited. The flow alarm comes into operation
at the start of the forward flush cycle.