6700 Portable Sampler User Manual - Isco

Figure 23 Event Mark Timing Diagram
50
51
52
Pulse at Beginning of
Presample Purge
Pulse at Beginning of
Forward Pumping
Variable Duration Pulse
During Entire Pump
Variable Duration Pulse
During Forward
Pumping
6700 SAMPLERS
Presample Purge Rinse Cycle Pump Volume 1 Pump Volume 2 Pump Volume 3 Postsample Purge
Note: This diagram shows the pulses sent for a bottles-per-sample distribution scheme
Using the Purge-Count
screens
PRE-SAMPLE PURGE:
____COUNTS
(10-9999)
POST-SAMPLE PURGE:
DEPENDENT ON HEAD
FIXED COUNT
POST-SAMPLE PURGE:
____COUNTS
(10-9999)
Note
The state of the I/O lines is not
defined when the sampler is OFF.
PRESAMPLE AND POSTSAMPLE
PURGE COUNTS
The presample purge is when the pump runs in reverse clearing
the strainer of any debris before taking a sample. The presample
purge is set at 200 pump counts. After the sample is taken a postsample
purge occurs to clear the liquid from the suction line. The
duration of the postsample purge is determined by the length of
the suction line to maximize the battery life. The pre- and postsample
purge can also be manually set.
I/O PIN PROGRAMMING
Pins C, H, and I on the Rain Gauge Connector are user-configured
as I/O1, I/O2, and I/O3 (Input/Output pins) respectively.
Each pin can be either an input for sampler enabling, or an output
for alarms such as PROGRAM DONE, RUN ERROR, etc.
The CONDITIONS I/O output can report alarm conditions using
the parameters the 6700 is configured to measure. Similar to the
Sampler Enable, you can set thresholds for one or two conditions
and the CONDITIONS output can then trigger alarms when the
measured parameters exceed the threshold.
Isco offers an I/O module that interfaces the sampler with a large
number of non-Isco devices. For more information about the I/O
module, contact your sales representative.
97
Event Mark
Bottle Number
Event Mark
Bottle Number
Event Mark
Bottle Number
Event Mark
Bottle Number