A365 - Constant Current Stimulus Isolator

Automated bipolar pulsing for zero net charge on biological preparations

• Constant current
• Unipolar and bipolar stimulation modes
• Built-in non-compliance alarm
• Input is optically isolated
• Standard TTL triggering
• DC test mode
• Powered by 9 V alkaline or rechargeable batteries

Benefits

• Compliance voltage of at least 100V
• From a TTL input, the bipolar mode automatically creates alternating positive and negative pulses.
• Test mode makes performance evaluation easier.
• Optical isolation improves preparation safety and lowers noise susceptibility.

Applications

• Electrophysiology
• Brain slice stimulation
• In vivo brain and CNS stimulation

Model A365, which is activated by standard logic-level commands, can be automated bipolar pulsing gated for zero net charge on biological preparations by any pulse generator, stimulator, or computer output.

Dual tone audible alarms

When an open electrode circuit is found or when system compliance is obtained, a tone is heard. When a signal is applied to the input, an additional optional tone plays. There is also a test switch available to check the battery's charge.

Current delivery up to 10 mA at more than 100V

A three-digit control knob and a three-position range switch are used to set the stimulus currents. To a better than 1% degree, output current follows control settings. The voltage necessary to push the desired current through the load is automatically developed, subject only to compliance constraints, and output current is load independent. At more than 100 V compliance, the Model A360LA provides up to 10 mA current in three ranges.

Bipolar Output Polarity

A push switch on the front panel controls the output polarity. The command waveform switches the direction of bipolar current, making alternating pulses positive or negative.

Power

Both the A365R Stimulus Isolator and the A362 battery charger are included in this A365RC Stimulus Isolator.  Nickel metal hydride batteries are included with the rechargeable A365R. With the A365R, the A362 Battery Charger is necessary.

NOTE: Not intended for human use.

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