Related Manuals for World Precision Instruments A365
Summary of Contents for World Precision Instruments A365
- Page 1 WORLD PRECISION INSTRUMENTS Instrumenting scientific ideas INSTRUCTION MANUAL A365 Stimulus Isolator Serial No._____________________ www.wpiinc.com 082318...
- Page 2 WARNING! High voltages produced can produce dangerous electrical shock. This device is not approved for clinical applications. Do not turn on power while you are holding bare high voltage wires or connectors.
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Page 3: Table Of Contents
Claims and Returns ........................19 Repairs ............................19 Copyright © 2018 by World Precision Instruments. All rights reserved. No part of this publication may be reproduced or translated into any language, in any form, without prior written permission of World Precision Instruments, Inc. - Page 4 World Precision Instruments...
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Page 5: About This Manual
Please read these carefully. This symbol indicates a WARNING. Warnings alert you to actions that can cause personal injury or pose a physical threat. Please read these carefully. NOTES and TIPS contain helpful information. Fig. 1 A365 Stimulus Isolator World Precision Instruments... -
Page 6: Introduction
INTRODUCTION The A365 is a specialized stimulus isolator for use in neuroscience and muscle studies. Battery operated and electrically isolated from ground, its quiet internal control circuitry minimizes artifacts and has very low leakage specifications. Stimulus isolation is needed to assure the precise localization of stimulus current and to prevent current flow from the stimulation site to ground. -
Page 7: Unpacking
INSTRUMENT DESCRIPTION Controls INPUT: An external command voltage level of approximately 5 volts (TTL) applied to this connector enables current flow from the OUTPUT. Do not apply a continuous DC input voltage greater than 9 volts. World Precision Instruments... -
Page 8: Audible Alarms
Audio on — This is a high frequency tone to indicate stimulation is present. High tone with Audio off — compliance alarm, this indicates that the A365 cannot supply enough voltage to drive the requested “dialed-up” current through the test subject. -
Page 9: Operating Instructions
A365 after this point. NiMH batteries that have decayed below 5.5V (82.5V in A365) may not be further rechargeable and require replacement. Disposable alkaline batteries may be discharged longer (two hours at 10 mA) to 5.0 volts or less (75 volts on A365), however this not recommended as the cessation of the stimulation is not predictable. -
Page 10: Electrode Connections
The capacitive value of this electrode can be characterized as 0.2 pF/µ2 at 1 Khz. This form of stimulation is best suited to neuroscience applications. Normal Stimulation For larger currents in excess of 1 mA that may be required for muscular World Precision Instruments... -
Page 11: Biphasic Currents (Bipolar)
(b) biphasic (i.e., zero net charge) stimulus current using brief pulses. A365’s biphasic mode enables the user to alternate the polarity of successive current pulses so that the net DC current flow is zero. When using... -
Page 12: Monitoring Current On A Data Acquisition System (Lab-Trax 4/16)
It should be noted that in connecting the oscilloscope to view the A365 output, one output terminal usually will be connected to ground (thus, one cannot view or measure the output waveform without compromising A365’s isolation from ground). -
Page 13: Monitoring Voltage On A Data Acquisition System (Lab-Trax 4/16)
The instrument case has not been connected to any part of the internal circuit of A365. To make a connection to the case, a spade lug and wire can be inserted under the head of any screw on the underside of the instrument case. This is useful in reducing noise in a Faraday cage environment. -
Page 14: Low Battery Indication
1 and 2, then the electrode exhauster option is disabled. The A365 is factory shipped with this feature disabled. This can be tested with a voltmeter/ohmmeter. Turn the A365 power on, Output switch to ON. Leave the DC/Test switch to the center OFF position and do not move it. -
Page 15: The A362 Charger
Insert the new batteries with firm but moderate force to seat the battery in the clips. Match with care the male and World Precision Instruments... -
Page 16: Expected Battery Life
Nickel-Metal Hydride rechargeable batteries will discharge by themselves on the shelf. If the A365 is to be stored for a length of time (up to 3 months), then test the unit and either recharge the batteries or replace them as necessary. -
Page 17: Detailed Test
95V to ensure longevity during a procedure. Calibration There is no calibration for the A365D or A365R; any exacting current requirements should be verified by the user by using ohm’s law and a set of precision resistors World Precision Instruments... -
Page 18: Specifications
Current Rise Time + Delay ..6 µs, typical. (1000 Ω load) Current Fall Time + Delay ...10 µs, typical. (1000 Ω load) Impedance to ground ....10 Ω shunted by < 15 picofarads Isolation Max. Volts .....2500 VAC, input to output World Precision Instruments... - Page 19 A365 Leakage ........less than 9 nA at full scale 10 mA Power ...........Model A365D: 16 alkaline 9V batteries Model A365R: Rechargeable NiMH (7.2 V only (Requires A362 battery charger) World Precision Instruments...
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Page 20: Declaration Of Conformity
DECLARATION OF CONFORMITY World Precision Instruments... - Page 21 A365 World Precision Instruments...
- Page 22 World Precision Instruments...
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Page 23: Warranty
A365 WARRANTY WPI (World Precision Instruments, Inc.) warrants to the original purchaser that this equipment, including its components and parts, shall be free from defects in material and workmanship for a period of one year* from the date of receipt. WPI’s obligation under this warranty shall be limited to repair or replacement, at WPI’s option, of the equipment or defective components or parts upon receipt thereof... - Page 24 International Trade Center, 175 Sarasota Center Blvd., Sarasota FL 34240-9258 Tel: 941-371-1003 • Fax: 941-377-5428 • E-mail: sales@wpiinc.com 1 Hunting Gate, Hitchin, Hertfordshire SG4 0TJ Tel: 44 (0)1462 424700 • Fax: 44 (0)1462 424701 • E-mail: wpiuk@wpi-europe.com Germany Saarstraße 23, D-61169 Friedberg (Hesson), Germany Tel: +49 (0)6031 1602171 •...
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