Campbell Scientific PVS4100/4120/4150 Portable Automatic Samplers - Manual (Page 44)

Section 5. Programming
5-4
TABLE 5-1. Touchpad Button Descriptions
Button Description
MANUAL PURGE. Purges the intake line independent of program control, as long as a
programmed cycle has not started. Sampler starts its pump, creating pressure in the sample intake
tube to purge it of any excess material that may be present. Button must be pressed twice to purge
line. Sustained pressure on the key during the second press will cause purging to continue until the
key is released.
MANUAL ADVANCE. Distributor arm advances one position (e.g. to next bottle), dependent on
the equipment available (discrete samplers only). This action is NOT updated to any current
sampler program. Button must be pressed twice to initiate manual advance.
MANUAL SAMPLE. Initiate a single Sample Cycle. Sampler must not be engaged in a sampling
event at the time. This action and any resulting sample collected are NOT updated to any current
sampler program. The Bottle Position is NOT advanced. Program will continue uninterrupted.
Button must be pressed twice to initiate manual sample. Whether successful or not, the display will
read “MANUAL SAMPLE Completed”.
5.1.3 General Terms
Many of the functions available on the Touchpad have a variety of options to
enhance their capabilities. These options are programmable from the Touchpad
and require only that the sampler have the correct equipment configuration to
utilize them.
DISABLE
The display showing disabled will reflect the status of any function not being
used.
TIME/DAY
The basis for several timed functions is the Real Time Operating System. Time
(of) Day will be a means of setting the timing period for the START DELAY
function. The format is on a weekly basis, requiring hour, minute, AM/PM and
day inputs (HH:MM AM SUN). This means the Start Delay can be set to any
particular minute in a week.
INTERVAL TIME
Sampler operation can be controlled by fixed time intervals which do not
require Time/Day setting. SAMPLE INITIATION has an option whereby an
interval time can be set between sample cycles. The controller will cause
samples to be taken on a timed interval basis, continuing until the sample
program is completed by a full jar or operator intercession.
PULSE INPUT
This option will allow the controller to determine the sampler operation based
on external criteria. Pulses fed to an internal accumulator in the controller will
be compared to the setting entered by the operator and will cause a sample
cycle to start. The accumulator will reset immediately and counting of pulses