Dionex As, Руководство оператора

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AS Autosampler Operator’s Manual
296
Doc. 065051-03 1/08
Controlling the Injection Valve
The
VALVE
parameter sets the position of the injection valve to either
LOAD
or
INJECT
. A method's timed events can include only one Load and
one Inject command. The Load command must precede the Inject.
By default, the valve is set to
LOAD
in the
INIT
step and to
INJECT
in the
time zero step. This allows the valve to be loaded before timed events
begin. Then, you do not need to include the time for loading the loop in
the timed events.
You can clear the
LOAD
and
INJECT
parameters from the
INIT
and/or time
zero steps and then move them to other steps if desired.
•
To clear a
LOAD
or
INJECT
parameter, position the cursor in the field
and press
Delete
.
•
To move the
LOAD
or
INJECT
parameter to a different step, position
the cursor in the
VALVE
field of the desired step and press
Select
Δ
or
Select
∇ to select
LOAD
or
INJECT
.
Notes
•
If you move the
LOAD
and/or
INJECT
parameters to different steps, be
sure to allow enough time between the
LOAD
and the
INJECT
for the
loop to be completely loaded. The time needed depends on the sample
syringe volume and the syringe speed (see
Section 3.7 ).
•
If the simultaneous injection option is installed, you can set the
positions of both valves in the timed events.
Setting TTL and Relay Outputs
The
AS
has two TTL and two relay outputs for control of functions in
other devices. For example, if you connect TTL output 1 on the
AS
to
TTL input 1 on a pump, a signal from the
AS
will turn the pump motor on
and off.
In the
TTL
and
RLY
fields on the
TIMED EVENTS
screen, select
1
(on) or
0
(off) .
See Appendix E for details about TTL and relay control.