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Page 1: ...reamplifier Operating Manual Warning This instrument is not designed or intended for use in human applications or human experimentation 111 6008 15813841944 QQ 422612157 0755 28917660 jkang66 163 com...
Page 2: ...nt Pump 12 a Current Pump Compliance 12 b External Pump Level Reference 12 c Auxiliary Pump Output 13 d Z Test Impedance Test 13 4 Preamplifier 15 a Use of High and Low Cutoff Filters 16 b Monitor Amp...
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Page 6: ...staining iontophoretic drug injection and as a stimulating current polarize or depolarize In addition the Model 2400Z uses the CURRENT PUMP for microelectrode resistance measurements The 2400 also pr...
Page 7: ...lection 3 dB points are 0 3 1 0 3 0 10 30 100 and 300 Hz AUDIO MONITOR An internal audio power amplifier monitors the PREAMPLIFIER output Sound level is controlled by the MONITOR control Output is thr...
Page 8: ...v AC 50 Hz 4 Watts DIMENSIONS MAINFRAME 43 2 cm W 17 X 34 3 cm D 13k X 13 3cm H 5 1 4 for Rack mounting handle and brackets make width 48 3 cm 19 PROBE 5 7 cm 2Y4 X 3 2 cm PA X 2 5 cm 1 less mounting...
Page 9: ...250v AC range The power supply will operate from 50 or 60 Hz without modification The frequency indicated on the label identifies the frequency of the line notch filter 2 RACK MOUNTING The 2400 is sh...
Page 10: ...r any future need that you may encounter All this without ever touching the probe or the microelectrode STAIN Your microelectrode recording site can be marked for easy visual identification by using e...
Page 11: ...o zero nA Supplying an external bipolar analog signal into the EXT REF BNC jack with the PUMP LEVEL switch set to EXTERNAL allows the ideal current source to be programmed externally by the magnitude...
Page 12: ...T Each 100mV of peak to peak amplitude indicates a microelectrode resistance of one megohm i e 100mV megohm Thus a 20 megohm microelectrode resistance will appear as a 2 volt peak to peak signal Since...
Page 13: ...In instruments equipped for microelectrode resistance measurements 2400Z the CALIBRATE generator will be modified to a 2 Hz output The model 2400 is normally supplied with a 150 Hz CALIBRATE generato...
Page 14: ...stance The voltage gain of the preamplifier section is very high switch selection of 50 100 200 500 1 000 2 000 5 000 or 10 000 No other additional amplification should ever be needed between the micr...
Page 15: ...the preamplifier as a major noise contributor Noise generated by the microelectrode resistance Johnson Noise can also be controlled to some degree by manipulating the bandwidth or frequency response...
Page 16: ...put never use a MONITOR level so high as to cause oscillation and distortion in its output If the MONITOR amplifier provision is not used the output binding post on the rear panel should not be termin...
Page 17: ...wo different mating connectors are supplied with the 2400 initially A removable three inch long rod allows the probe to be mounted directly in your micromanipulator A flat removable probe mounting pla...
Page 18: ...t until oscillations start then back off one half turn This should be very satisfactory in the majority of cases 2 The neutralization control may be adjusted to compensate for fixed added input capaci...
Page 19: ...mainframe cabinet may be grounded to your experiment for the reference connection The probe is preferable for the lowest noise setup however experimentation with grounding may provide a better noise...
Page 20: ...ble to connect the microelectrode internal to the 2400 probe input connector To aid in mechanical mounting of the probe either the mounting plate secured to probe by the 4 cover screws or the mounting...
Page 21: ...120mA and the 15V supply should be capable of supplying 4OmA For battery operation we recommend either four Eveready type 717 batteries 7 5 volts each or four Eveready type 715 batteries The 717 s wi...
Page 22: ...0 system is warranted to be free from defects caused by materials workmanship and construction for a period of one year from date of purchase During this period Dagan Corporation will service your ins...
