operating instructions and system description for the ext
Contents
1. BNC connector providing the unfiltered output signal in DC mode with an amplification of ten Walim 5 LOW PASS FILTER Hz switch 1 a 6 position switch for selecting the corner frequency of the LOW PASS FILTER Corner frequencies Hz 1 10 30 100 300 Ik LCRA ns FETES Hii Note A combination of both LOW and HIGH PASS FILTER leads to a filter with bandpass characteristics 6 AC OUTPUT connector F BNC connector providing the filtered output signal in AC mode with an amplification Al Set by 1 version 1 0 page 5 EXT 0O2F User Manual 7 OFFSET potentiometer 10 turn potentiometer for OFFSET compensation for the measured potential in DC f mode i e the potential provided at connector 4 The range is set by switch 2 The analog BALANCE monitor 18 displays the offset in the range of 30 mV and is used for optimal cancellation of the offset Note Position 5 corresponds to 0 V OFFSET 8 HEADSTAGE connector Connector for the optional headstage br 9 12 INPUT coupling switches 0 gt Switches for selecting the input coupling of the signal De AC the input signal is AC coupled with a corner frequency of 0 1 Hz DC the input signal is DC coupled 0 the input signal is grounded 10 11 INPUT INPUT connectors Banana jacks or BNC connectors respectively for connecting the input signal The inputs can be used in single ended or differential configuration2. In differential configuration the signal which is connected to INPUT is subtracted from the signal that is connected to INPUT If only one input is used single ended configuration the other should be grounded to avoid coupling of noise Important Only one of the INPUTS must be used 1 e either the banana jacks or the BNC connectors or the optional headstage 13 GROUND connector Banana jack providing system ground GROUND 14 Audio volume potentiometer F Potentiometer for setting the volume of the speaker Turning clockwise will turn up the sound version 1 0 page 6 EXT 0O2F User Manual 15 CHANNEL selector Switch for selecting whether the signal of CHANNEL A or CHANNEL B is monitored aa by the audio monitor 16 PITCH NOISE selector se Switch for selecting the audio MODE NOISE The voltage of the INPUT signal is transduced to sound PITCH The voltage of the INPUT signal is converted into a tone with a frequency equivalent to the amplitude of the INPUT voltage Noe 17 OVERLOAD LEDs LEDs that indicate if the amplifier 10 below it s positive or negative limit 10 V The linear range of the amplifier is 12 V CHER L 18 BALANCE x10mV meter The analog BALANCE monitor displays the OFFSET in the range of 30 mV and is used for optimal cancellation of the OFFSET 2 4 Description of the Rear Panel ON OFF Control for switching the EXT 02F ON or OFF LIN
3. modules connecting or disconnecting sensors headstages or other components from the instrument or 19 cabinet TEMPERATURE DRIFT WARM UP TIME All analog electronic systems are sensitive to temperature changes Therefore all electronic instruments containing analog circuits should be used only in a warmed up condition 1 e after internal temperature has reached steady state values In most cases a warm up period of 20 30 minutes is sufficient HANDLING Please protect the device from moisture heat radiation and corrosive chemicals version 1 0 page 3 EXT 0O2F User Manual 2 EXT 02F 2 1 Components The following items are shipped with this EXT O02F system V Amplifier J User manual Optional Differential headstage with connectors 2 2 System Description The EXT 02F is designed for extracellular recordings The standard model comprises of two identical channels but a one channel version is also available In the following description of the system only one channel is mentioned because the two recording channels are identical The EXT O02F has a differential input with high input impedance to avoid noise The output voltage signal is available either filtered AC coupled with variable gain or DC coupled with an amplification factor of ten Two LEDs indicate whether the amplifier 1s running out of its linear range and an analog balance monitor makes the control of offsets easy A built in audio speaker monitors th
4. only by selected trained and adequately instructed personnel For details please consult the GENERAL TERMS OF DELIVERY AND CONDITIONS OF BUSINESS of npi electronic D 71732 Tamm Germany 1 2 3 4 5 GENERAL This system is designed for use in scientific laboratories and must be operated by trained staff only General safety regulations for operating electrical devices should be followed AC MAINS CONNECTION While working with the npi systems always adhere to the appropriate safety measures for handling electronic devices Before using any device please read manuals and instructions carefully The device is to be operated only at 115 230 Volt 60 50 Hz AC Please check for appropriate line voltage before connecting any system to mains Always use a three wire line cord and a mains power plug with a protection contact connected to ground protective earth Before opening the cabinet unplug the instrument Unplug the instrument when replacing the fuse or changing line voltage Replace fuse only with an appropriate specified type STATIC ELECTRICITY Electronic equipment is sensitive to static discharges Some devices such as sensor inputs are equipped with very sensitive FET amplifiers which can be damaged by electrostatic charge and must therefore be handled with care Electrostatic discharge can be avoided by touching a grounded metal surface when changing or adjusting sensors Always turn power off when adding or removing
5. E OUT Phone jack connector for external audio amplification e g with sound cards power amplifiers etc EXT SPEAKER Phone jack connector for external speaker AC INPUT SUPPLY Connector for an external power supply 14 V AC 0 5 A version 1 0 page 7 EXT 02F User Manual 3 Technical Data Differential Input Input Output x10mV DC Output AC Line Out Speaker Out Low pass filter High pass filter Offset compensation Potential monitor Wall power supply Dimensions version 1 0 CMR gt 90 dB at 1 kHz tested with 0 Q input resistance gt 10 Q range 1 V gain x10 Output range 12 V into 1 KO 1 V into 250 Q load selectable gain x100 x200 x500 x1k x2k x5k x10k Output range 12 V into 1 kQ2 1 V into 250 Q load impedance 20 kQ 3 5 mm mono phone jack impedance 8 Q 3 5 mm mono phone jack 1 10 30 100 300 1k Hz 0 1 0 3 1 3 10 30 Hz 0 1 V switch position 10 mV 10 turn potentiometer V switch position 100 mV 10 turn potentiometer analog display for the electrode offset range 30 mV 14V AC 0 5 A 245 x 200 x 90 mm page 8
6. Electronic Instruments for the Life Sciences OPERATING INSTRUCTIONS AND SYSTEM DESCRIPTION FOR THE EXT 02F EXTRACELLULAR AMPLIFIER WITH FILTERS One or Two Channel Recordings VERSION 1 0 npi 2006 npi electronic GmbH Hauptstrasse 96 D 71732 Tamm Germany Phone 49 0 7141 9730230 Fax 49 0 7141 9730240 support npielectronic com http www npielectronic com EXT 0O2F User Manual Table of Contents ts SCY RO UI AUC MNS hewitt tect Sata E eaten ne elena taunts tee seta ate achat tase tec nea 3 De Oe EEE A E E EEE EE A E EEE AEA E EEA 4 Zils SC OMpPOMemtS tess cacetich eo tiaeieiar ak taaaguceteiaeh teal iauiaia neha ciausnee teat ateatiauinins eke aaeeaeeiants 4 Dds DY em De senpi oi ca ececicseidaationaraaciesaaadadtNettecwniseisds utiyncctesiesnaadedinhesowni sede Wyse shown tiaauct anda 4 2 5 DEST pOr Or the Front PANG ora E E ttdverncusiubenduncnientueredenee 4 2 4 Description of the Rear Pane escini uai eea 7 3 Technical Data siciaxssssssstiupretineesteascseeteledaadeeassetiedaueleawarveiad si nidesaiiaa miewedeeiadhinaddeeeas 8 version 1 0 page 2 EXT 02F User Manual 1 Safety Regulations VERY IMPORTANT Instruments and components supplied by npi electronic are NOT intended for clinical use or medical purposes e g for diagnosis or treatment of humans or for any other life supporting system npi electronic disclaims any warranties for such purpose Equipment supplied by npi electronic must be operated
7. e output signal of one channel A or B Two phone jacks at the rear panel allow connection of an external speaker or further audio amplification e g computer sound card power amplifier etc 2 3 Description of the Front Panel Figure 1 EXT O02F front panel view one channel version version 1 0 page 4 EXT 0O2F User Manual In the following description of the front panel elements each element has a number that is related to that in Figure 1 The number is followed by the name in uppercase letters written on the front panel and the type of the element in lowercase letters Then a short description of the element is given Since the front panel elements are identical for each channel A and B with identical functions and labels these elements are numbered and described only once for channel A 1 GAIN switch _ 7 position switch for selecting the GAIN of the filtered output signal at the AC OUTPUT connector 6 Amplification factors x100 x 200 x500 x1k x2k x5k x10k 2 OFFSET range switch Switch to set the range for the OFFSET potentiometer 7 A 1 V corresponds to a range from 0 mV to 100 mV at the electrode 1 4 0 1V corresponds to a range from 0 mV to 10 mV at the electrode 3 HIGH PASS FILTER Hz switch 6 position switch for selecting the corner frequency of the HIGH PASS FILTER Corner frequencies Hz 0 1 0 3 1 3 10 30 1 Hote PAST FEANEN Hah 4 DC x10 mV output connector
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