SYS-A385R

Overview

• Combines optical isolation with +/1 mA current generator
• Battery charger sold separately
• Designed for Neuroscience & Muscle applications 

Delivers positive, negative, or bipolar currents

Delivers positive, negative, or bipolar currents. For bipolar delivery, polarity of the output is toggled to the opposite state with each pulse presented to the input. Pulse duration is controlled by an externally applied voltage. In­put connector is a standard BNC, allowing signals from any source — such as computer D/A or I/O lines — to be used.

Output amplitude

Output amplitude is set on a 3-digit, ten-turn dial as a percentage of the range selected: for example, a setting of 45.6 in the 0-10 mA range translates to 4.56 mA at the output.

Accurate and repeatable

Accuracy and repeatability are excellent. Designed for subcutaneous stimulation, maximum output voltage at the stimulating electrodes is 36 volts, reducing the possibility of serious accidental transcutaneous shocks. A compliance/output alarm sounds when the 36-volt limit is reached. Internal circuitry maintains electrodes short-circuited during inactive periods (“electrode exhauster” feature). A385 is not appropriate for transcutaneous stimulation.

Battery life

The 1.2 amp-hour rating of the six heavy-duty lead-acid rechargeable batteries ensures that experiments will not be interrupted by dead batteries — even at peak currents. Indicator lights and audible alarms keep the user constantly apprised of battery charge status. These batteries must be recharged by the A382 System Charger designed especially for the A385.

Specifications

OUTPUT WAVEFORM	DC or current pulse
OUTPUT CURRENT RANGES	1, 10, and 100mA
CURRENT AMPLITUDE ERROR	0.5% of full scale, max
CURRENT RESOLUTION REPEATABILITY	0.1% of full scale, typical
OUTPUT LOAD VOLTAGE EXCURSION (COMPLIANCE)	36V
EXTERNAL COMMAND VOLTAGE	5V at 3mA minimum, 8.5V maximum
EXTERNAL COMMAND VOLTAGE: OUTPUT POLARITY	Reversible, manual switch, or electronically switched bipolar delivery
EXTERNAL COMMAND VOLTAGE: CURRENT RISE TIME AND DELAY	6μs, typical (1 KOhm load)
EXTERNAL COMMAND VOLTAGE: CURRENT FALL TIME AND DELAY	10μs, typical (1 KΩ load)
EXTERNAL COMMAND VOLTAGE: OUTPUT TO GROUND RESISTANCE	10^12Ω
EXTERNAL COMMAND VOLTAGE: OPTOCOUPLER	2500V, rated minimum breakdown voltage
POWER	Six rechargeable lead-acid batteries (Requires companion charger A382)
DIMENSIONS	8.5 x 3.5 x 5 in. (22 x 9 x 12 cm)
SHIPPING WEIGHT	5 lb. (2.3 kg)

 

      

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