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SS2 AND SS2-MC STIMU-SPLITTER II |
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The Stimu-Splitter
II is a versatile, compact stimulus power booster with built-in
switching and precision monitoring capabilities. It is a perfect
complement to the Grass S48, S88 or S88X stimulators for applications
which require more output power than the S48, S88 and S88X can provide.
It is ideal for multiple tissue bath applications, which may utilize
plate or ring electrodes submersed in a saline bath. This offers
a very low impedance to the stimulator and requires relatively high
values of stimulus current.
The Stimu-Splitter
power booster is the ideal solution to stimulator overload problems,
providing ample current to drive up to eight low resistance electrode
arrays. The Stimu-Splitter allows quick determination of both peak
stimulus voltages and current.
Optional
0.1 Hz Metering Capability
The
amplifiers inside the Stimu-Splitter II do not limit how low a stimulation
pulse frequency can be used. However, the digital peak voltage/current
meter stores the highest amplitude (peak) it sees over a moving
window of time. If an equivalent or higher pulse is seen, the window
moves. If an equivalent or higher pulse is not seen within this
moving window of time, the meter resets and looks for a new (usually
lower) amplitude to display. The rate of detection of such a lower
amplitude and the subsequent display update can ideally be as fast
as the stimulation pulse rate. When high pulse rates are used, the
detection and display of a lower amplitude can be very fast, and
at slow pulse rates the response time to lowering the amplitude
will (necessarily) be slow.
To allow the
user to optimize the response time of the digital peak meter for
their specific stimulation frequency, the Stimu-Splitter has a 3-position
Stimulus Frequency selector switch on the front panel with positions
for ≥10 Hz, ≥1 Hz, or ≥0.5 Hz. The researcher
should set this switch to the fastest setting corresponding to the
stimulus frequency.
However, for
researchers who need to stimulate all the way down to 0.1 Hz, Model
SS2-MC changes the lowest setting of this switch to handle frequencies
to 0.1 Hz. This changes the meter response (to a lowering of the
pulse amplitude) to 10 seconds. A 10-second response time can be
disconcerting if the researcher is stimulating at 0.5 Hz and would
like a response in 2 seconds. Therefore, this option should be ordered
only if the researcher intends to stimulate at frequencies below
the standard 0.5 Hz setting.
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| Peak
Meter |
| Range |
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+24
volt mode: 0 to +24 volts, 0 to 999 mA
+12 volt mode: 0 to +12 volts, 0 to 600 mA |
| Resolution |
|
0.1
volt, 1 mA |
| Accuracy |
|
±1%
or ±0.1 volt*, ±1% or ±1 mA*
*Whichever value is greater (percentage is of displayed
reading). Frequency of recurring peak must be ≥0.5 Hz (or
≥0.1 Hz with SS2-MC), and the peak amplitude must be ≥0.1
msec in duration. |
| Signal
Characteristics |
Pulsed
Waveforms |
|
Frequency:
0.5 Hz to 5 kHz, or 0.1 Hz to 5 kHz (with SS2-MC)
Duration: 0.1 msec to 1 sec
Duty Cycle: 0.005% to 50%, Duty Cycle = Duration
x Frequency x 100%
Amplitude: 0 to +24 volts (+24 volt mode), -12 volts to +12 volts
(±12 volt mode) |
Non-pulsed
Waveforms |
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Virtually
any shape waveform can be boosted by the Stimu-Splitter II |
| Output |
Output
Voltage
Range |
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0
to +24 volts, or -12 volts to +12 volts |
| Peak
Output Current |
|
1
Ampere each output |
Maximum
Power
Out |
|
24
watts each output |
Output
Impedance |
|
0.2
ohms |
| Protection
|
| Output
Protection |
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All
outputs are overload and short circuit protected |
| Input
Protection |
|
All
inputs are overvoltage protected to ±150 volts |
| Line
Input |
| Voltage
|
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Rear
panel selectable, 100 volts to 127 volts, or 208 volts to 250 volts |
| Current |
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1
Ampere at 120 volts, 0.6 Ampere at 240 volts, |
| Line
Cord |
|
Specify
destination country on the order for proper line voltage selection,
fuse and local country IEC line cord |
| Physical
Size |
| Physical
Size |
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10"
W x 4.5" H x 8" D
(25.4 cm x 10.2 cm x 20.3 cm) |
| Weight |
|
9
lbs. (4.08 kg) |
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|
SS2 Stimu-Splitter
II
| 8
High Power Outputs |
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providing
ample current to stimulate 8 submersed tissues in almost any
stimulation application |
| 8
Individual Output Switches |
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allowing
individual tissue stimulation at the flip of a switch |
| 8
Sensitive Output Pulse Monitors |
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providing
clear visual indication of even the slightest tissue stimulation
on any channel |
| Digital
Peak Current Meter |
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for
easy, accurate measurement of individual tissue stimulation
currents |
| Digital
Peak Voltage Meter |
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for
easy, accurate measurement of individual tissue stimulation
voltages |
| +24
Volts and ±12 Volt Output Ranges |
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allowing
either monophasic or biphasic stimulation signals to be boosted
and measured |
| Multiple
Signal Capability |
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allows
up to 4 stimulators with completely different stimulation
signals to be boosted and measured using a single Stimu-Splitter
II unit |
| Auxiliary
Monitor Output |
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allows
switch selectable viewing of output channels using any auxiliary
monitor (e.g., oscilloscope) without patching and reconnecting
probes or cables |
| Voltage
Level Adjustment (using optional SA1 accessory) |
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provides
individual voltage level adjustment for each output pair |
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| ORDERING
INFORMATION |
| Model
SS2 |
|
Stimu-Splitter
II Stimulator Power Booster including manual (specify destination
country on the order for proper line voltage selection, fuse and
local country IEC line cord) |
|
Model SS2-SA |
|
Adaptor
and cable for connection to Grass Stimulators, (BNC to UHF) 3-foot
(0.9 m) cable |
| Model
SS2-MC |
|
0.1
Hz Metering capability for SS2 |
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|
Stimulator
Attenuator accessory for SS2, including 4, 1.5-foot (0.45 m) output
cables |
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