6700 Portable Sampler User Manual - Isco

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Adjusting the Display
Backlighting
Enter the Hardware setup.
Step through the screens until
you see:
BACKLIGHT ALWAYS OFF
TIMED BACKLIGHT
CONTINUOUS BACKLIGHT
PressSTOPtwicetoreturnto
the main menu.
Event Mark Screens
Charts for event marks screens
appear in:
Figure 43, Extended Programming:
Hardware Screens
on page 129.
Figure 44, Extended Programming:
Hardware Quick
View Screens on page 130.
6700 SAMPLERS
DISPLAY BACKLIGHTING
The display has a backlight that is adjustable so that the backlight
is always off, timed or always on.
In the timed backlight mode the sampler turns the backlight off
after detecting no key strokes within 60 seconds. Any keystroke
(except ON-OFF) turns the backlighting on again. In this mode
the backlight must be on before the sampler accepts a menu
choice or number entry. If you press a key and a screen does not
respond, it is because the keystroke turned the backlight on.
Isco recommends you use either the setting, BACKLIGHT
ALWAYS OFF or TIMED BACKLIGHT when using a battery.
EVENT MARKS
The sampler generates an event mark at each sample event,
sending it through the flow meter connector to a connected
instrument: a 3200 Series Flow Meter, 4200 Series Flow Meter,
or 4100 Series Flow Logger.
The event mark may also control an external device; a connected
solenoid relay, for example. When using the event mark for a
data logger or to control external devices, you may need to adjust
the mark by changing the factory settings.
The event mark is adjustable through the hardware setup
screens. You can set up the sampler to generate an event mark
for every EVERY SAMPLE or for COMPLETE SAMPLES. If you
select COMPLETE SAMPLES, the sampler sends a three-second
pulse only after it successfully collects a sample. The sampler
will not send an event mark if an error occurs, such as “No Liquid
Detected.”
If you select EVERY SAMPLE, the sampler will send an event
mark every time a sample is initiated. The event mark signal can
be a:
3-second pulse at the beginning of the presample purge.
3-second pulse at the beginning of forward pumping only,
marking the time the sampler deposited the sample.
Variable duration pulse generated during the pump cycle,
fromthebeginningofthepresamplepurgetotheendofthe
postsample purge.
Variable duration pulse generated only during forward pumping.
Figure 23 shows event mark timing diagrams.
Bottle Number
Concurrent with the event mark, the sampler also sends a bottle
number signal. The bottle number signal is a series of pulses.
The number of pulses sent represents the bottle currently accepting
a sample. (See Figure 23).
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