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Page 6
EXTERNAL INPUT
For additional flexibility in experimental use, the
Picospritzer III has a front panel BNC jack for each
channel which permits independent activation of
the two channels from external sources. The
selector toggle switch above each jack determines
the source of the control signal for that channel. In
the “EXTERNAL” position, it operates by
energizing the valve whenever the input signal
is high (+5 V.D.C.) and de-energizes it when the
signal returns to ground. This allows for pulse
durations longer than the capacity of the internal
timer. In the “TIMER” position, the channel is
connected to the internal timer and will activate
whenever that timer is triggered (either manually or
externally).
SECOND CHANNEL
The Picospritzer III is equipped with a separate
BNC jack and selector toggle for each of the two
channels. This allows 2 external signals to be used
to operate the 2 channels independently when the
selector toggles are set to the “EXTERNAL”
position. Placing a selector toggle to the “TIMER”
position connects that channel to the internal timer
for operation whenever the timer is triggered (either
manually or externally). To prevent a channel from
triggering, place the selector switch in the
“EXTERNAL” position and do not make a
connection to the BNC for that channel.
All Picospritzer III's are designed with second-
channel capability.
MARKER
The time mark provides a convenient indication of
the duration of the pulse with respect to a biological
signal much like that of the “artifact” associated
with iontophoresis. It is a 5-volt TTL signal
controlled by channel one. The time mark not only
provides a useful indication of the duration of the
pulse, but it may also serve as a sync-out signal for
triggering the sweep of an oscilloscope, etc.
HOLDERS FOR PRESSURE PIPETTES
Standard pipette holders are available for pipettes
with diameters of 1.0, 1.2, 1.5 and 2.0 mm.
For prices and dimensions, see the Picospritzer
Accessories list.
No internal adjustment of the Picospritzer should be
undertaken by the user without consulting the
manufacturer. Detailed instruction will be provided
if necessary.
PICOSPRITZER III FAQ
(Frequently Asked Questions):
1. I used to purchase the vacuum loading unit is that
still available?
Currently, the vacuum loading unit is no longer
available for purchase
2. I used to purchase a 0-10 or 0-60psi regulator, are
those options still available?
Currently, we no longer offer the 0-10 or 0-60psi
regulator, only configurations listed on page 11 are
currently available
3. If I purchase a two channel unit, can I trigger the
two channels independently using two separate
footswitches or push buttons?
Currently, the Picospritzer III can only handle one
footswitch or push button (the footswitch and push
button control the internal timer). You can trigger
them independently using an external trigger. Please
see Second Channel section to the left.
4. If I purchase a two channel unit can, I provide
separate pressures to the two valve boxes?
Currently, the Picospritzer will only provide the same
pressure to both valve boxes.
