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SELECT OPTION: (<-->)
OUTPUT PINS
SET OUTPUT _: (<-->)
PROGRAM COMPLETED
3.3.9 Tubing Life
SELECT OPTION: (<-->)
TUBING LIFE
___ PUMP COUNTS,
WARNING AT __00000
• PROGRAM COMPLETED – This event occurs when a
running sampling program has finished. This alarm
output stays on as long as the run time display reads
PROGRAM COMPLETED.
• PUMP FAILURE – This event occurs when the sampler
has detected a pump failure. This condition must be
corrected before the sampling program can resume. This
alarm output stays on until the pump is successfully
operated.
• DISTRIBUTOR JAMMED – This event occurs when the
sampler has detected a distributor failure. This
condition must be corrected before the sampling
program can resume. This alarm output stays on until
the distributor is successfully operated.
• 3-WAY VALVE CONTROL – This event occurs whenever a
sample is initiated and controls the optional Three-way
Valve. This sampler option is useful when collecting
samples from a pressurized line. For more information
about the optional Three-way valve option and sampling
from pressurized lines, contact your Isco dealer or the
Teledyne Isco factory.
To configure the alarm output pins:
1. Select the OUTPUT PINS option and press Enter.
2. Press the Previous or Next buttons to select an event type
for the displayed output channel.
3. Press the Enter button to select the event type and
advance to the next output channel.
Repeat until all four alarm outputs are programmed.
Refer to section 2.8 for details on connecting the alarm output
pins to external devices.
Select this option to view and reset the pump counts. The Tubing
Life feature serves as a reminder so you can replace the pump
tube at regular intervals before its wall cracks and ruptures.
Several problems may arise from a weak or ruptured pump tube:
• The sampler will not pump the liquid
• Pump jams
• Inaccurate sample volumes
• Faulty liquid detection
To set the Tubing Life reminder:
1. Select the TUBING LIFE option and press Enter.
2. The sampler displays the current pump count. The display
automatically advances in four seconds or press Enter to
continue.
Isco 4700 Refrigerated Sampler
Section 3 Programming
3-7
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