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Axon Axopatch 200B User Manual

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Axopatch 200B, Copyright 1997-1999, Axon Instruments, Inc.
March 1999
Axopatch 200B
Patch Clamp
Theory and Operation
Part Number 2500-121 Rev D, Printed in U.S.A.
Copyright 1997-1999 Axon Instruments, Inc.
No part of this manual may be reproduced, stored in a retrieval system, or transmitted, in
any form or by any means, electronic, mechanical, photocopying, microfilming, recording,
or otherwise, without written permission from Axon Instruments, Inc.
QUESTIONS? Call (650) 571-9400

Table of Contents

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Axon Axopatch 200B Specifications

General IconGeneral
CategoryIndustrial Equipment
ManufacturerMolecular Devices
TypePatch Clamp Amplifier
Voltage ClampYes
Current ClampYes
Capacitance CompensationYes
Series Resistance CompensationYes
Bandwidth1 MHz
Sampling Rate500 kHz
Operating ModesVoltage Clamp, Current Clamp
Power Requirements100-240 VAC

Summary

IMPORTANT INFORMATION

Disclaimer

States the equipment is not intended for human experimentation or application.

Usage Warning

Warns that deviation from manufacturer specifications may impair protection.

Power Supply and Fuse

Covers voltage selection and fuse changing procedures for the instrument.

Equipment Setup and Safety

Details connection, mounting, and assembly for safe operation.

Environmental Conditions

Specifies conditions for safe and optimal instrument operation.

Static Precautions

Advises on handling the headstage to prevent static discharge.

WARNING: SHIPPING THE AXOPATCH 200B

COPYRIGHT

Verification

States the instrument is tested but researchers should verify accuracy.

DISCLAIMER

LATE INFORMATION

Chapter 1 INTRODUCTION

Chapter 2 FUNCTIONAL CHECKOUT

Startup Procedure

Outlines the steps for performing an initial functional checkout.

Chapter 3 USE OF THE PATCH CLAMP — A TUTORIAL

Single Channel Recording (Model Cell)

Guides through single-channel recording using a model cell.

Pipette Offset Adjustment

Details adjusting pipette offset for zeroing junction potentials.

TRACK and V-CLAMP Modes

Explains using TRACK and V-CLAMP modes for adjustments.

Pipette Capacitance Compensation

Describes compensating pipette capacitance.

Leak Subtraction

Explains adjustment of the leak subtraction control.

Whole-Cell Recording (Model Cell)

Guides through whole-cell recording using a model cell.

Whole-Cell Capacitance Compensation

Details cancelling whole-cell capacity transients.

Series Resistance Compensation

Covers methods for series resistance compensation.

Brief and Detailed Methods

Provides brief and detailed methods for series resistance compensation.

Current Clamp (Model Cell)

Membrane Potential and Whole-Cell Current Clamp

Explains membrane potential and whole-cell current clamp.

Single-Channel Recording (Real Cell)

Whole-Cell Recording (Real Cell)

Electrochemistry

Headstage

Offset Adjustment For Headstage

Details how to adjust the headstage offset.

Headstage Operation and Maintenance

Covers frequency boosting, grounding, dimensions, mounting, and cleaning.

Headstage Handling Precautions

Includes static, optical, and acoustic pick-up precautions.

Tuning the Headstage

Refers to the headstage tuning procedure.

Holders

Features

Describes features of the HL-U pipette holder.

Parts and Optional Ag/AgCl Pellets

Details holder parts and optional Ag/AgCl pellets.

Input BNCs

Blank Activate and Capacitance Dither

Describes Blank Activate Input and Capacitance Dither Control.

External Command, Forced Reset, and Speed Test Inputs

Covers various input BNCs for commands and testing.

Chapter 6 Reference Section: Instrument Operation

Basic Operation Modes

Covers Bridge Mode, Capacitance Measurements, Command Potentials, Seal Test, Current Clamp, Whole-Cell Params, Electrode Comp.

Holding Command

Details the function of the Holding Command control.

Instrument Limitations and Electrochemistry

Discusses limitations and electrochemical measurement capabilities.

Headstage

Provides information on the headstage unit.

Offset Adjustment For Headstage

Details how to adjust the headstage offset.

Headstage Operation and Maintenance

Covers frequency boosting, grounding, dimensions, mounting, and cleaning.

Headstage Handling Precautions

Includes static, optical, and acoustic pick-up precautions.

Tuning the Headstage

Refers to the headstage tuning procedure.

Output Section

Filter and Output Gain

Describes the output filter and gain controls.

Output BNCs (Cell Capacitance Telegraph, Data Not Valid)

Details the Cell Capacitance Telegraph and Data Not Valid outputs.

Telegraph Outputs (Gain, Frequency, Mode)

Covers gain, frequency, and mode telegraph outputs.

Scaled and Other Outputs

Describes Scaled Output and 10Vm Output.

Panel Meter

Panel Meter Signals

Lists the signals displayed by the panel meter.

Power-Supply Voltage Selection and Fuse Changing

Supply Voltage

Details the instrument's universal voltage input range.

Changing the Fuse

Provides instructions for changing the fuse.

Probe Temperature

Zap

Amplitude, Duration, and Suggested Use

Explains Zap amplitude, duration, and suggested usage.

Chapter 7 Reference Section: General Information

Grounding and Hum

Provides guidance on grounding and minimizing hum.

Model Cell

Describes the PATCH-1U model cell.

Model Bilayer

Describes the MCB-1U model bilayer.

Power-Supply Glitches

Discusses minimizing effects of power supply transients.

Ten-Turn Potentiometers

Addresses issues with ten-turn potentiometers.

Chapter 8 Reference Section: Principles of Operation

Headstages

Explains the principles of operation for headstages.

Principals of Operation

Details the operating principles of headstages.

Resistor Feedback

Explains the principles of resistor feedback in headstages.

Capacitor Feedback

Explains the principles of capacitor feedback in headstages.

Zap and Lipid Bilayers

Covers Zap technique and lipid bilayer experiments.

Experimental Techniques (Lipid Bilayers)

Details experimental techniques for lipid bilayers.

Noise vs. Access Resistance

Discusses the relationship between noise and access resistance.

Current and Voltage Conventions

Defines current and voltage conventions used.

Current Definitions

Defines positive, inward, and outward current.

Potential Definitions

Defines positive potential and transmembrane potential.

Whole-Cell Clamp Commands

Explains depolarizing/hyperpolarizing commands and Vm vs. command potential.

Inward / Outward Current Definitions

Defines inward and outward current conventions.

Series Resistance

Defines series resistance and its effects.

Absolute Value

Explains absolute value of series resistance.

Correction, Prediction, and Lag

Details series resistance correction, prediction, and lag.

Series Resistance Compensation Controls

Describes controls for series resistance compensation.

Chapter 9 Specifications

CV 203BU Headstage Specifications

Details headstage construction, configuration, gain, and feedback elements.

Feedback and Capacitance Compensation

Covers feedback elements, tuning, and capacitance values.

Case, Bandwidth, and Stability

Specifies case, bandwidth, and capacitive load stability.

Instrument Noise and Reset Characteristics

Details instrument noise and reset characteristics.

Current Clamp Specifications

Provides current clamp speed settings and compensation details.

Pipette Holder and Capacitance Compensation

Covers pipette holder and capacitance compensation.

Series Resistance and Whole-Cell Capacitance

Details series resistance and whole-cell capacitance ranges.

Series Resistance Compensation Controls

Describes % Prediction, % Correction, and Lag controls.

% Prediction, % Correction, and Lag

Details the function of prediction, correction, and lag controls.

Capacitance Dithering and Modes of Operation

Covers capacitance dithering and instrument modes.

Zap and Command Potentials

Details Zap function and command potentials.

Amplitude, Duration, Seal Test, and External Commands

Covers Zap amplitude/duration, Seal Test, and External Commands.

Holding Command and Pipette Offset

Describes Holding Command and Pipette Offset controls.

RMS Noise

Specifies the RMS noise levels.

Inputs and Outputs

Covers inputs (Forced Reset, Blank Activate, Speed Test) and outputs.

Output Controls and Telegraphs

Details output gain, filters, leak subtraction, and telegraphs.

Chapter 11 Headstage Tuning Procedure

Equipment Required

Lists the necessary equipment for headstage tuning.

Gain and Offset Trim

Describes gain and offset trim adjustments.

Frequency Tuning (Whole Cell Config.)

Details frequency tuning for the whole cell configuration.

Reset Transient Compensation

Explains the procedure for reset transient compensation.

Forced Reset

Details the forced reset procedure.

Internal Reset

Describes the internal reset procedure.

WARRANTY

WARNING

Shipping the Axopatch 200B

Provides guidelines for safely packaging the instrument for shipping.

Circuit Diagrams Request Form

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