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6.3.5. Open/Close Gradient Valves
This item enables to open valves (A, B, C, D) manually when the pump is stopped,
respectively it enables to close open valves when the pump is not running. It is used during pump
service, when it is necessary to disconnect the flow system, where mobile phase flows by gravity.
Both actions are done in the same menu item, where text is different according to the valve status.
T
EXT
O
PTION IS
M
ENU
I
TEM
Setting
Description
OPEN GRADIENT VALVES
Displays when valves are closed and enables to open them.
CLOSE GRADIENT VALVES
Displays when valves are opened and enables to close opened
valves.
Press ENTER to proceed selected action.
Example:
When menu item
AUTO VALVES CLOSING
) is set on
ENABLE
,
valves are after unit start closed and after it stops running they are automatically
closed again. In this moment the unit enables to open the valves manually by
pressing
ENTER
in menu item
OPEN GRADIENT VALVES
. Selected valve
opens and changes from
OPEN GRADIENT VALVES
to
CLOSE GRADIENT
VALVES
. After start and stop the valves close again.
6.4. IO Config
6.4.1. Ethernet
In each submenu can be set possibilities of Ethernet connection.
Note:
Before connecti
ng the unit into “corporate” network, always contact local
network administrator and consult connecting parameters. This way you
will prevent collisions in the network. For more information and
troubleshooting with connecting ethernet devices, read document Manual-
Ethernet_devices, available upon request.
Ethernet interface supports communication speed 10/100 Mb/s. Common UTP cable (Cat
5e) can be used for connection. Main communication runs on port 10001 and function of automatic
lookup uses port 51455, older type 30718. Unit also supports these services: DHCP client
(automatic IP address allocation), AUTOIP [automatic IP address is
169.254.x.y. (x.y. …randomly
generated numbers), when DHCP server is not accessible in the network], web server (port 80)
and ICMP protocol (test connection test using tool PING).
