Hach-Lange POLYMETRON 9240 Operator Manual - Manual (Page 111)

109
Maintenance and Diagnostics
9.10.1 Hydraulics
9.10.2 Relays
TEST HYDRAULICS allows you to check that all accessories
apart from relays and logical inputs are working correctly.
The screen allows selection of the solenoid valves, the
conditioning valve, the pumps, the mixer or the drain.
Select the element you wish to test and then select On to
activate it or Off to deactivate.
Note that if the conditioning valve is turned On here, it cannot
be turned Off using this option. The instrument will turn it off
automatically after 50 test cycles.
The number of solenoid valve options displayed will be the
same as the number of channels. The example left shows the
screen for a 4-channel analyzer.
Press Esc to exit the screen.
Select this option to check that all eight relays are working
correctly.
Select the relay you wish to test and then select On to
activate it or Off to deactivate it.
Press Esc to exit the screen.