INSTRUCTION MANUAL
FOR
AC/DC DIFFERENTIAL AMPLIFIER
MODEL 3000
Serial #__________
Date____________
A-M Systems
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
March 2020
Страница 1: ......
Страница 2: ...L FOR AC DC DIFFERENTIAL AMPLIFIER MODEL 3000 Serial __________ Date____________ A M Systems 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 March 2020 ...
Страница 3: ...rocedure 6 Theory of Operation 9 Specifications 11 Warranty and Service 13 Each AC DC Differential Amplifier is delivered complete with One 3 Foot Cable Remote Power Supply Rack Mount Hardware NOTE This instrument is not intended for clinical measurements using human subjects A M Systems does not assume responsibility for injury or damage due to the misuse of this instrument ...
Страница 4: ...rode to be measured during stimulation at six levels of gain 5V mA 10V mA 0 05V µA 0 1V µA 0 5V µA 1V µA Impedance Mode utilizes an internally calibrated current source to allow in situ verification of electrode impedance and adjustment of capacitance compensation Units that are sold with a head stage are pre configured to work with the headstage and the front panel gain values include the gain of...
Страница 5: ...rent through the electrode while the unit is in stimulate mode STIM The center pin of the BNC is the input and the outer conductor is the stimulus input When the unit is in the STIM mode the output will be a measure of the current passing through the electrode in six ranges 5V mA 10V mA 50mV µA 0 1V µA 0 2V µA or 1V µA STIM GATE REC This toggle switch controls the operating mode for the Model 3000...
Страница 6: ...ts the variable DC offset voltage which is summed with the input voltage This feature may be used to compensate for electrode potentials and to position the signal trace on an oscilloscope recording device An input offset range of 0 0 V to 250 mV is available The COARSE knob will cover 250 mV and the FINE knob will add up to 25 mV to the COARSE knob s position DC OFFSET SWITCH OFF This switch sets...
Страница 7: ...ASS switch is set at 1 kHz then a 10 kHz signal will be attenuated by a factor of 100 while a 100 kHz signal will be attenuated by a factor of 10 000 One of the uses of this filter is to reduce high frequency noise that is above the frequency content of the signal being recorded Head stage indicator HEAD STAGE This LED indicates whether the unit is configured for use with HEAD STAGE lit or without...
Страница 8: ...than the model 3000 you will need to complete the following procedure To set the model 3000 for use with a head stage all jumpers must be set to the H position see figure 2 below Once the jumpers are in the H position the unit can only be used with a head stage To return the unit for use without a head stage simple move the jumpers to their previous position Calibrate the unit for headstage Set th...
Страница 9: ...OBE GND or the GND on the front panel must be connected to provide a return current path If neither ground is connected the Head Stage Amplifier will saturate and no signal will be measured Care should be taken to keep the power cables from all instruments as far away as possible from the recording setup One exception is the DC power cable that supplies power to the model 3000 This side of the cab...
Страница 10: ...T BNC with the horizontal sweep rate set to 2ms division Zero the scope Flip the input switch to DIFF 7 Observe the offset potential between the two electrodes on the oscilloscope Set the DC OFFSET OFF switch to the appropriate polarity and adjust the DC OFFSET knob to zero the amplifier output Note make sure your oscilloscope is in DC mode 8 Turn on the Ω TEST button to inject a 100 Hz square wav...
Страница 11: ... lead is equal to and opposite of that in the active lead only isolated stimulus sources should be used An added benefit of isolated stimulus sources is that they produce less stimulus artifact than ground referenced sources The Positive Conductor of the Stimulus connector center pin is connected through the Probe to the active electrode lead while the Negative Conductor outside ring of the BNC is...
Страница 12: ...he signal from this amplifier is coupled through positive feedback with a capacitor to form capacity compensation The capacity compensated signal is offset adjustable through a precision variable voltage reference The signal from the initial stage then passes through High pass if activated Notch if activated and Low pass filters Finally the signal passes through a gain stage of up to 200 times The...
Страница 13: ...OBE the indifferent electrode lead At the same time relay K1 to connect the stimulus source at the STIMULUS INPUT connector to the electrode leads A stimulus current from an isolated source passes through the PROBE lead to the active electrode returning through the PROBE lead and the 100Ω resistor The current creates a voltage across the 100Ω resistor which is amplified by the differential amplifi...
Страница 14: ... 10V Gain 250mV input offset adjust Stability versus temperature 50µV ºC Stability versus time Stimulus Mode 1mV 12hours Output current ratio 5V mA 10V mA 50mV µA 0 1V µA 0 2V µA 1V µA Maximum output current reading 10V or 2mA Maximum stimulus current Maximum stimulus voltage 10mA Diff 100V Diff Impedance Input 15V Output impedance ratio 2nA source 0 1Vp p MΩ 0 2Vp p MΩ 1Vp p MΩ 2Vp p MΩ 10Vp p MΩ...
Страница 15: ... 10V minimum High Pass filter settings DC 0 1 1 10 100 300 Hz 15 High Pass filter gain 40dB decade Low Pass filter settings 0 1 0 3 1 3 10 20 kHz 15 Low Pass filter gain Power 40dB decade REMOTE AC Power source 100 240 VAC 50 or 60 Hz DC voltage into the amplifier for use inside of faraday cage Physical Dimensions Width 8 5 inches 21 6 cm Height 4 inches 10 2 cm Depth 3 5 inches 8 9 cm Weight 5 po...
Страница 16: ...e the obligations of A M Systems under this warranty During the warranty period A M Systems agrees to repair or replace at its sole option without charge to the Purchaser any defective component part of the hardware To obtain warranty service the Purchaser must return the hardware to A M Systems or an authorized A M Systems distributor in an adequate shipping container Any postage shipping and ins...
Страница 17: ...ought against you by another party THIS EQUIPMENT IS NOT INTENDED FOR CLINICAL MEASUREMENTS USING HUMAN SUBJECTS A M SYSTEMS DOES NOT ASSUME RESPONSIBILITY FOR INJURY OR DAMAGE DUE TO MISUSE OF THIS EQUIPMENT Jurisdictions vary with regard to the enforceability of provisions excluding or limiting liability for incidental or consequential damages Check the provision of your local jurisdiction to fi...
Страница 18: ...iption 2 6 30 06 Initial Document Control release 3 4 28 10 DCR201200 Warranty and Company info 4 11 20 15 DCR 202472 202512 Correct for x10Hs 5 2 27 17 DCR 202739 Correct Rev Numbering 6 1 18 19 DCR 202615 Review content add content rev control 7 3 19 20 DCR 203316 Update Warramty 8 ...
