stimulators
6020 Dual Impedance Stimulator
Harvard Apparatus Stimulus Isolation Unit
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• Essential safety device for experiments involving
AC-powered stimulators
• Effectively isolates any stimulator having a
minimum output of 12 volts
• Available with positive or negative output pulses
Dual Output Impedance
Sync Output
150 Volt Output Amplitude
9 Pulse Widths
The 6020 Stimulator is similar to the 6012 stimulator, however there is no
dual pulse function. Instead this unit has a fully earth isolated output
amplitude of 150 Volts, which can be set at 100 Ωs or 100 K Ωs
impedance. The delay circuit allows the output pulse to be delayed in
relation to the sync output.
Specifications
Frequency Range
0.1 to 1000 Hz in 4 ranges
Pulse Width Range
0.1 to 50 mS in 9 preset steps
Dual Pulse Delay
0 to 1000 mS
Output Amplitude
0 to 0.15 Volts, 0 to 5 Volts or 0 to 50 Volts
Rise and Fall Time
> 5 µsec
Gate In
Short Circuit or 12 Volt (Max) Logic Pulse (triggers on
falling edge)
Connections
2 x insulated 4 mm sockets (Output)
1 x uninsulated 4mm earth connection
3 x BNC socket (Gate & Sync Connections)
Power
110-115 Volts 60 Hz or 220-230 Volts 50 Hz
Order #
Product
PY2 50-6020 6020 Dual Impedance Stimulator
This Isolation Unit makes true biphasic stimulation available to the
researcher at a low cost when used in conjunction with the PY2 50-6002
Harvard Apparatus Single Pulse Stimulator and PY2 50-6012 Harvard
Apparatus Single/Dual Pulse Stimulator, see page I29. This self-contained,
battery-powered Isolation Unit is constructed of plastic for additional
isolation. The Unit’s output faithfully reproduces the pulse shape
characteristics of the driving stimulator, but is optically isolated from it.
The output voltage is controlled by a 3 decade digital potentiometer
providing a range from zero volts to approximately 96% battery supply
voltage in steps of 0.1%.
In operation, the stimulator controls are set to the required pulse width and
frequency. These factors are maintained independently of the stimulator
voltage. The output of the stimulator is set to 12 volts. It is then connected to
the Stimulus Isolation Unit. The output of this Isolation Unit is then set to the
required voltage and connected to the appropriate electrodes.
Physiology
6000 Series Stimulators (continued)
stimulators
research
Specifications
External Power Source
12 to 100 VDC batteries
Input from Stimulator
Dimensions, H x W x D
100 Ω
Weight
225 g (1/2 lb)
Output Impedance
Order #
12 V
60 x 155 x 95 mm (25 x 6 x 35 in)
Product
PY2 50-8275 Harvard Apparatus Stimulus Isolation Unit* with
Positive Output Pulses
PY2 50-0090 Harvard Apparatus Stimulus Isolation Unit* with
Negative Output Pulses
*Note: This Unit MUST NOT be, under any circumstances, powered by any AC power unit in
place of the batteries. To do so would destroy all the isolation characteristics.
Harvard Apparatus • phone 508.893.8999 • toll free U.S. 800.272.2775 • fax 508.429.5732 • www.harvardapparatus.com
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