Agilent Technologies HP 5890 II Plus Series, Manual

Page: 48 / 53

Installation
Connecting signal output cables
47
The variety of functions available makes custom•designedoperating
systems possible. Some examples include:
C
A simple push•buttonswitch installed across Pins 1 & 2 permits
starting the HP 5890 from a remote location. In performing manual
injections, for example, it is quite convenient to have remote
start
capability located in the inlet area to minimize time delays between
starting the HP 5890 and injecting sample.
Alternatively, an integrator or chart recorder having suitable remote
start output capability can be connected across Pins 1 & 2 to permit
the remote device to start the HP 5890.
C
It is also convenient to have a connected integrator or chart recorder
start automatically when an analysis is initiated at the HP 5890. If
the integrating or recording device can be started remotely by a
contact closure, Pins 7 & 8 (or 7 & 10) may be used for this purpose.
- Note that Pins 7 & 8 (or 7 & 10) are always momentarily
connected to each other when
START
at the HP 5890 is pressed.
- Note also that when
START
is pressed, behavior of the oven
temperature program depends upon the condition at Pins 3 & 4:
If 3 & 4 are not connected, the oven temperature begins
immediately.
If Pins 3 & 4 are connected, the oven temperature program does
not begin until Pins 1 & 2 are connected.
Pins 3 & 4, if connected, permits the HP 5890
START
key to start a
remote device without simultaneously starting its own oven
temperature program.
For example, this permits setting up a system for automated
operation using an integrator, an automatic sampler, and a controller
for the sampler. With Pins 3 & 4
connected
, when
START
is pressed
at the HP 5890, Pins 7 & 8 (or 7 & 10) are connected momentarily to
signal the sampler controller to operate the sampler.