Physiology Stimulators, Transducers, Amplifiers, Recorders & Data Acquisition D342 2-Channel Stimulators and Bi-Phasic Switcher Monitoring
This 2-Channel Bi-Phasic switcher is for use
The D330-MultiStim System provides a choice
with a D333H or D343 module. The unit pro-
of three different stimulators. Each has output
vides the switching function required to alter-
channels with independent, automatically re-
nate the polarity of the stimuli to each of two
set output protection and indication of error
preparations. It provides control of stimulus
conditions but they differ in their capabilities.
polarity (Normal, Alternating or Reverse) in-
The Meter module is a precise method of moni-
dependently for each channel as well as warn-
toring voltage or current without the need of
ing of a stimulus timing rate that is too-fast.
an oscilloscope and more than one can be fit-
The control and timing for the pulses is gener-
ated by selecting other modules from theD330 - MultiStim™ range. D345 PowerStim Includes Case and Power Supply. This is a com-
It should be noted that the unit works with
bination of a Rack and Power Supply along with
mechanical relays that require a certain time
a permanently mounted stimulator. This four-
to switch their polarity. The circuitry is designed
channel high-current, constant voltage stimu-
so that the changeover command is taken (in-
lator has a common control for stimulus am-
dependently for each channel) from the end of
plitude. The rack allows four bays for timing,
each stimulus timing pulse so that the relay
‘moves’ when no stimulus is being applied.
As with all mechanical devices, relays have a
D333H Dual Stimulator
finite life. This is quoted as a minimum of
A double-width unit with two totally indepen-
100,000,000 mechanical operations. If the re-
dent constant voltage stimulation channels. The
lay was to ‘move’ whilst a stimulus was pre-
D333H has an output capability allowing a
maximum output of up to 1 A per channel.
quicker than the mechanics. Therefore, the cir-
D343 Dual Stimulator
cuit will detect and warn the user if the ‘time-
Similar to the D333H but with constant cur-
between’ stimuli pulses is less than 5 ms. The
user must ensure that this never happens. Specifications D335 Meter Polarity Selector:
This module allows selection of the channel
Left hand blue socket will gopositive with respect to assoc-iated
for monitoring of current or voltage. This is
displayed on a 3-digit display which is ‘held’
until the next pulse, for ease of reading.
Right hand blue socket will gopositive with respect to assoc-iated
Specifications D345 PowerStim: Amplitude Rise/Fall Time Rise/Fail Time Mechanical Life D343 Dual Stimulator 0 to 50mA or 0 to 500mA from Current and Voltage Monitoring
The current and output voltage of each chan-
Electrical Life D335 Meter
nel can be monitored independently with the
D335 METER as taken from the output of the
D333H/343 stimulation module. This can show
Catalog No. Indicators:
either the voltage or current of the selected
CGS 8117.71 Model D345 PowerStim
channel immediately before the end of the
Too-Fast
stimulation pulse. The meter will always read a
positive value irrespective of the polarity of the
CGS 8118.71 Model D333H Dual Stimulator Catalog No. CGS 8119.71 Model D343 Dual Stimulator CGS 8115.71 Model D342 Dual Bi-Stim module CGS 8120.71 Model D335 Meter Module CGS 8116.71 Dual Channel Bi-Phasic Switcher
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