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A-MSystems 1800 Instruction Manual

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  • Page 2 INSTRUCTION MANUAL MICROELECTRODE AC AMPLIFIER MODEL 1800 Serial #__________ Date____________ A-M Systems, Inc. PO Box 850 Carlsborg, WA 98324 U.S.A.  360-683-8300 800-426-1306 FAX: 360-683-3525 http://www.a-msystems.com Version 7.0 Febrary 2002...

  • Page 3: Table Of Contents

    Contents General Description ..........................1 Instrument Features ............................1 Controls and Connectors ............................ 2 Operating Instructions ........................4 Typical Set-Up Procedure ........................... 4 Problem Solving ..............................6 Theory of Operation ........................... 9 Overview ................................9 Operational Modes ............................10 Component Modules ............................12 Calibration Proceedures ........................

  • Page 4: General Description

    Each channel of the Model 1800 contains a high-gain, low-noise differential amplifier stage followed by low frequency, high-frequency, and notch filters. Three operating modes are available to accomodate recording, stimulating, and verification of electrode impedance.

  • Page 5: Controls And Connectors

    The extreme swings A-M Systems 131 Business Park Loop, P.O. Box 850 Carlsborg, Wa 98324 Telophone: 800-426-1306 * 360-683-8300 * FAX: 360-683-3525 E-mail: amsys@a-msystems.com * Website: http://www.a-msystems.com...
  • Page 6 (i.e. bath ground, animal ground, etc.). A-M Systems 131 Business Park Loop, P.O. Box 850 Carlsborg, Wa 98324 Telophone: 800-426-1306 * 360-683-8300 * FAX: 360-683-3525 E-mail: amsys@a-msystems.com * Website: http://www.a-msystems.com...

  • Page 7: Operating Instructions

    When an isolated stimulator is used the connector must be grounded to function properly. PROBE- A-M Systems 131 Business Park Loop, P.O. Box 850 Carlsborg, Wa 98324 Telophone: 800-426-1306 * 360-683-8300 * FAX: 360-683-3525 E-mail: amsys@a-msystems.com * Website: http://www.a-msystems.com...
  • Page 8 Since R=V/I and I is known, the monitored voltage is a measure of the electrode impedance. A-M Systems 131 Business Park Loop, P.O. Box 850 Carlsborg, Wa 98324 Telophone: 800-426-1306 * 360-683-8300 * FAX: 360-683-3525 E-mail: amsys@a-msystems.com * Website: http://www.a-msystems.com...

  • Page 9: Theory Of Operation

    Overview The Head Stage Probe, containing an high input inpedance, low-noise, differential amplifier, is connected to the Model 1800 through a 9-pin Input connector assigned to each channel. The Mode Switch for each channel controls the input configuration of the Probe attached to that channel as well as the operation of the subsequent stages of the amplifier.

  • Page 10: Operational Modes

    0.1 mA, 1 kHz Differential - sine wave that passes through the electrodes, and the voltage that develops is A-M Systems 131 Business Park Loop, P.O. Box 850 Carlsborg, Wa 98324 Telophone: 800-426-1306 * 360-683-8300 * FAX: 360-683-3525 E-mail: amsys@a-msystems.com * Website: http://www.a-msystems.com...

  • Page 11: Component Modules

    The High Frequency Cut-Off Filters (A103, A203) are second-order Butterworth low-pass filters with selectable cut-off points. A-M Systems 131 Business Park Loop, P.O. Box 850 Carlsborg, Wa 98324 Telophone: 800-426-1306 * 360-683-8300 * FAX: 360-683-3525 E-mail: amsys@a-msystems.com * Website: http://www.a-msystems.com...
  • Page 12 Problem Solving If you are experiencing problems with the Model 1800, the following procedure will assist in diagnosing the source of the problem. It is important to follow these steps in the order presented and change only those controls listed. For the following procedures, a variable frequency function generator capable of producing sine wave outputs and an oscilloscope will be needed.
  • Page 13 V. As the input signal frequency is decreased below the setting, LOW CUT-OFF the signal at will also approach 0 V. OUTPUT A-M Systems 131 Business Park Loop, P.O. Box 850 Carlsborg, Wa 98324 Telophone: 800-426-1306 * 360-683-8300 * FAX: 360-683-3525 E-mail: amsys@a-msystems.com * Website: http://www.a-msystems.com...
  • Page 14 4 0 d B f o r G AI N o f X 1 0 K A-M Systems 131 Business Park Loop, P.O. Box 850 Carlsborg, Wa 98324 Telophone: 800-426-1306 * 360-683-8300 * FAX: 360-683-3525 E-mail: amsys@a-msystems.com * Website: http://www.a-msystems.com...

  • Page 15: Calibration Proceedures

    CAUTION: Do not open the HeadStage probe for any of these proceedures. A-M Systems 131 Business Park Loop, P.O. Box 850 Carlsborg, Wa 98324 Telophone: 800-426-1306 * 360-683-8300 * FAX: 360-683-3525 E-mail: amsys@a-msystems.com * Website: http://www.a-msystems.com...

  • Page 16: Power Supply

    Procedure B indicates a problem with the power supply: the instrument must be returned to the factory for repair. A-M Systems 131 Business Park Loop, P.O. Box 850 Carlsborg, Wa 98324 Telophone: 800-426-1306 * 360-683-8300 * FAX: 360-683-3525 E-mail: amsys@a-msystems.com * Website: http://www.a-msystems.com...
  • Page 17 Repeat this proceedure for locations TP201 through TP203 and T200 through T203 to calibrate Channel 2. A-M Systems 131 Business Park Loop, P.O. Box 850 Carlsborg, Wa 98324 Telophone: 800-426-1306 * 360-683-8300 * FAX: 360-683-3525 E-mail: amsys@a-msystems.com * Website: http://www.a-msystems.com...

  • Page 18: Test Points

    GAIN: X10K OUTPUT Repeat this proceedure for locations RL22 and TP200 through TP202 to calibrate Channel 2. A-M Systems 131 Business Park Loop, P.O. Box 850 Carlsborg, Wa 98324 Telophone: 800-426-1306 * 360-683-8300 * FAX: 360-683-3525 E-mail: amsys@a-msystems.com * Website: http://www.a-msystems.com...
  • Page 19 Check that the voltage is 1 V p-p at 1 kHz Repeat this proceedure to calibrate Channel 2. A-M Systems 131 Business Park Loop, P.O. Box 850 Carlsborg, Wa 98324 Telophone: 800-426-1306 * 360-683-8300 * FAX: 360-683-3525 E-mail: amsys@a-msystems.com * Website: http://www.a-msystems.com...

  • Page 20: Specifications

    115 V, 60 Hz or 230 V, 50 Hz; < 5 W total Physical Dimensions Width 17 inches (43.2 cm) Height 4.75 inches (12.1 cm) A-M Systems 131 Business Park Loop, P.O. Box 850 Carlsborg, Wa 98324 Telophone: 800-426-1306 * 360-683-8300 * FAX: 360-683-3525 E-mail: amsys@a-msystems.com * Website: http://www.a-msystems.com...

  • Page 21: Warranty And Service

    A-M Systems 131 Business Park Loop, P.O. Box 850 Carlsborg, Wa 98324 Telophone: 800-426-1306 * 360-683-8300 * FAX: 360-683-3525 E-mail: amsys@a-msystems.com * Website: http://www.a-msystems.com...
  • Page 22 WARRANTIES AND REMEDIES, WHETHER EXPRESS OR IMPLIED. A-M SYSTEMS DISCLAIMS THE WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR USE, WITHOUT LIMITATION. A-M Systems 131 Business Park Loop, P.O. Box 850 Carlsborg, Wa 98324 Telophone: 800-426-1306 * 360-683-8300 * FAX: 360-683-3525 E-mail: amsys@a-msystems.com * Website: http://www.a-msystems.com...
  • Page 23 A-M Systems Model 1800 Manual DRW-5026500 rev 8 Revision History Date Description 6/30/06 Initial Document Control release 4/28/10 DCR201200 Warranty and Company Information...

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