Installation
Connecting signal output cables
48
At injection, the sampler controller simultaneously must signal the
integrator to begin integrating data, and must start the HP 5890 oven
temperature program (via Pins 1 & 2).
C
Where the HP 5890 is to be started from a remote device, it is
convenient to have indication as to whether or not the HP 5890 is
ready. This is available via Pins 5 & 6, which remain connected until
HP 5890 readiness occurs, or via Pins 5 & 9 which remain
disconnected until HP 5890 readiness occurs.
Choice of which pair of Pins to use depends upon requirements of the
remote device.
C
Conversely, Pins 11 & 12 permit a remote device to report its
readiness to the HP 5890: if Pins 11 & 12 are connected, the remote
device is assumed not ready. At the HP 5890, the NOT READY LED
will be lit, EXT DEVICE NOT READY is displayed by pressing
CLEAR
,
and not ready is reported to the INET system (if used).
An example of where this function might be required is where, in
automated operation, an integrating or computing device requires
time to process and report data for a just•terminatedrun before the
next run can begin.
C
Note that there is no remote stop function; the HP 5890 stops the
current run either when
STOP
is pressed, or upon completing its
oven temperature program. A connected integrating or recording
device must be stopped separately, either manually or through its own
timed events table.
RS-232 and HPIB/RS-232 cables
For RS•232(Option 560) and HPIB/RS•232 (Option 580) cable
installation information, refer to the appropriate document included with
each option.
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