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.
To Next Page
Loading...
