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3700 Portable Samplers
Section 3 Programming Guidelines
3.9.16 Purge Counts
3.9.17 Tubing Life
3.9.18 Program Lock
3.9.19 Sampler ID
3.9.20 Run Diagnostics
3-52
purge. The second option, "FWD PUMPING," sends a pulse at
the beginning of the sample delivery when the pump is running
forward. (Display #332)
The Purge Counts option is used to override the number of pump
counts needed to clear the suction line in both pre-sample purge
and post-sample purge cycles.
The pre-sample purge count is normally set to 150 counts and
will be reset to this value if the sampler is reinitialized. The
post-sample purge count is derived from the suction line
diameter and length settings. If your observations indicate that a
greater or lesser number of pump counts in either purge is
needed, you can change the count settings. Entries are to be
between 0 and 9,999 for both purges. You can obtain a purge
count using the pump forward or pump reverse keys. (Display #s
340 and 341)
The Tubing Life option sets the number of pump counts needed
to trigger the "Replace Pump Tubing" warning. The warning is
activated when the pump count reaches the entered value, and
only appears after you press
pump counter after replacing the pump tubing. If you consis-
tently experience a tubing failure at a pump count that differs
significantly from the current setting, enter that value here. The
factory-set value of 500,000 pump counts will deliver approxi-
mately 500 samples of 200 ml each, using a
vinyl suction line at a 5-foot suction head. (Display #350, 351,
and 352)
Select "ENABLE" to turn the lock on. When the Program Lock is
enabled, each protected display can be viewed, but no values can
be changed without first entering the pass-number: 3700. Once
the pass-number has been entered, you can change any value or
setting in either the program or configure sequence. (Display
#360)
The Sampler ID option allows you to enter a 10 character identi-
fication number (ID) for the sampler. The ID number is used to
identify sampling reports produced by the Teledyne Isco Field
Printer and in files created by Samplink. The sampler is shipped
from the factory with 10 dashes (-) entered for the ID. (Display
#365)
Acceptable Characters – T h e I D f i e l d w i l l a cc e p t d i g i t s,
dashes, spaces, and periods. You can enter spaces, dashes, and
periods with three of the control keys. Enter a space with the
key, a dash (-) with the
START SAMPLING
a period with the
RESUME SAMPLING
Run Diagnostics performs a number of diagnostic functions. This
option contains the software revision number; tests the sampler's
RAM (Random Access Memory), ROM (Read Only Memory),
. You must reset the
DISPLAY STATUS
3
/
-inch-by-10-foot
8
MANUAL SAMPLE
key.
key, and
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