OPERATING INSTRUCTIONS AND SYSTEM DESCRIPTION FOR
Contents
1. 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 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 i e after internal temperature has reached steady state values In most cases a warm up period of 20 30 minutes is sufficient HANDLING Pleas2. not exceed 10 V 11 GAIN switch Switch to set the GAIN for the INPUT signal x1 x10 or x100 12 LOWER LEVEL potentiometer 10 turn potentiometer for setting the value of the LOWER LEVEL Range 10 V Very important The LOWER LEVEL is always set by this potentiometer even if the value set here is greater than the value set by the UPPER LEVEL potentiometer 13 0 switch Switch for selecting the polarity of the LOWER LEVEL Note that setting the switch to 0 forces the LOWER LEVEL to zero 4 Definition of Signals PPD positive peak detection NPD negative peak detection gt LOWER TTL output when the input signal is higher then lower level PPD TTL output when the input signal is lower then lower level NPD gt UPPER TTL output when the input signal is higher then upper level PPD TTL output BNC when the input signal is lower then upper level NPD version 2 4 page 8 WD 01 User Manual IN WINDOW PULSE WIDTH ERROR LED TTL output when the input signal is higher then lower level or lower then lower level without going higher then upper level The pulse occurs when the input signal is leaves the window See also fig 2 and fig 3 for more clarification this trim pot controls the width of the TTL pulses provided at the window outputs The variation is possible between 50 us and 5 ms this LED will light if the pulse width of the TTL outputs is wider than the incoming signal For instance in fi
3. of the signals caused by the power supply 2 4 PWR 03D The external power supply PWR 03D is capable of driving up to 3 EPMS E housings Each housing is connected by a 6 pole cable from the one of the three connectors on the front panel of the PWR 03D to the rear panel of the respective EPMS E housing see Figure 1 Figure 3 A POWER LED indicates that the PWR 03D is powered on see Figure 1 Power switch voltage selector and fuse are located at the rear panel see Figure 2 Note The chassis of the PWR 03D is connected to protective earth and it provides protective earth to the EPMS E housing if connected version 2 4 page 4 WD 01 User Manual PWR O3D ossa TTT Ta Figure 1 PWR 03D front panel view Figure 2 PWR 03D rear panel view Note This power supply is intended to be used with npi EPMS E systems only 2 5 System Grounding EPMS 07 The 19 cabinet is grounded by the power cable through the ground pin of the mains connector protective earth In order to avoid ground loops the internal ground is isolated from the protective earth The internal ground is used on the BNC connectors or GROUND plugs of the modules that are inserted into the EPMS 07 housing The internal ground and mains ground protective earth can be connected by a wire using the ground plugs on the rear panel of the instrument It is not possible to predict whether measurements will be less or more noisy with the internal ground and mains g
4. 493 cas saacasnnsaeeuavedaatsaastaa ss a a ERE A R E EEE 6 3 3 Description of the Front Panel o0neoeeeeseeeeseooreoeesssessesrsoersooerssesosessseessoerseoersseeesesee 6 4 Definition Of SIGNals sient E A 8 5 Function of the Window Discrimimator cccossscssscssssssssessncessacescssscsesacescnaseesneeseenes 9 6 Waveforms in Dependence of the Input Signal 1 eee eeeeeneeceeeeeceeeeeceeeeeenteeeenaeeeenee 10 7 Waveforms in Dependence of the Input Signal 2 oo eee eeeceesereeceeeeeeeeeeeenneeeeneeeenaeeees 11 Bo WC CMIN GAL A DE E E E E A maaeeatiaeectaermeee 11 version 2 4 page 2 WD 01 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 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 only by trained staff General safety regulations for operating electrical devices should be followed AC MAINS CONNECTION While working with the npi systems always
5. D j Electronic Instruments for the Life Sciences poASube wade OPERATING INSTRUCTIONS AND SYSTEM DESCRIPTION FOR THE WD 01 WINDOW DISCRIMINATOR MODULE FOR EPMS SYSTEMS npi VERSION 2 4 npi 2014 npi electronic GmbH Bauhofring 16 D 71732 Tamm Germany Phone 49 0 7141 9730230 Fax 49 0 7141 9730240 support npielectronic com http www npielectronic com WD 01 User Manual Table of Contents Ty Safety Reg la ons periei er AR T E A ES A AEE E E Se 3 2 EPMS 07 Modular Plug In System seeseeeeesseesseessessseressetssseessressersseresseeesseessresseesseeesseee 4 2 1 General System Description Operation sssssssesesseesseesseesseresseessseessesseesseresseeesseee 4 2 2 EPMS 07 HOUS nenun n eit ao a Ea ETIE a 4 23 TSP IESE OF GUSTS reri ae a a a a e e Eais 4 2A APWR A OE as set itt aa E e E A tee Cheah 4 2 9 System GOUNCING series en ea a aE AEA E EE E ATE 5 EPMS 0T reni eann ean a a E ethan aia e aea eeart 5 BIE OT m a dens aap css base vag Dev sot aes RA EE A ee 5 207 Tecnica MAL A cccaaccapcacncivsscdscasecetdst ap geaacaauaseuassaccanceoveeatadae ceases A EAN 5 MS NLS 1h sesh aeiee ae aE a a E osh tage A E aed aa saan a EEEa 5 EPMIS E O7 oroia annin a TAE E KE AA TEE A E AA AEA 5 3 WD 01 Window Discriminator ssseseseseeseeessresseesseseseresseessstesstessersseeesseeessseessresseesseeeseet 6 lll WD 0I COMponentS 25255 espe alate E EE E E E E R 6 Side System DESCHIPUON 235555562
6. E WIDTH is greater than the width of the INPUT signal 6 MUX OUTPUT connector BNC connector providing a multiplexed output of the lower level upper level and amplified input for display on an analog oscilloscope i e this connector provides upper and lower level and the amplified signal simultaneously WINDOW OUTPUTS TTL 7 IN WINDOW connector BNC connector providing a TTL signal if a signal enters and leaves the window created by the upper and the lower level setting The levels are detected similar as when using the gt upper or gt lower connectors but a TTL is generated only if the positive peak of signal is within the windows created by the upper and the lower level PPDM or if the negative peak of signal is within the windows created by the upper and the lower level NPDM 8 gt UPPER connector PPDM BNC connector providing a TTL signal if a signal goes more positive than the upper level NPDM BNC connector providing a TTL signal if a signal goes more negative than the upper level version 2 4 page 7 WD 01 User Manual 9 gt LOWER connector PPDM BNC connector providing a TTL signal if a signal goes more positive than the lower level NPDM BNC connector providing a TTL signal if a signal goes more negative than the lower level 10 INPUT connector BNC connector for the INPUT signal Range 10 V Important The signal is amplified by the factor set by the GAIN switch The amplified signal must
7. EL INPUT SIGNAL LOWER LEVEL UPPER LEVEL cock TUUUUUUUUUUUUUUUUUUUUUUUUUUU UUU UUU UU UUUUUUL gt tpuse 4 l a l A gt Lpulse G E j gt Upulse I _ gt Upulse i Io _ IN WINDOW i ft o IN WINDOW ey NOTE means Positive peak detection Negative peak detection PEAK PEAK switch 8 Technical Data Electrical Data Input resistance 1 MQ Output impedance 250 Q Input range 10 V Input amplification x1 x10 x100 Output voltage range 10 V Window level range 10 V Signal gt LOWER gt UPPER IN WINDOW TTL compatible pulses 3 5V pulse width adjustable between 0 05 ms and 5 ms Impedance of TTL signal outputs lt 500Q Delay time multiplexed output signal on time 18 us 60 Lower amp Upper levels 6us 20 each Error detection LED light duration 1 s version 2 4 page 11
8. e protect the device from moisture heat radiation and corrosive chemicals version 2 4 page 3 WD 01 User Manual 2 EPMS 07 Modular Plug In System 2 1 General System Description Operation The npi EPMS 07 is a modular system for processing of bioelectrical signals in electrophysiology The system is housed in a 19 rackmount cabinet 3U has room for up to 7 plug in units The plug in units are connected to power by a bus at the rear panel The plug in units must be kept in position by four screws M 2 5 x 10 The screws are important not only for mechanical stability but also for proper electrical connection to the system housing Free area must be protected with covers 2 2 _EPMS 07 Housing The following items are shipped with the EPMS 07 housing V EPMS 07 cabinet with built in power supply Y Mains cord JV Fuse2A 1A slow V Front covers In order to avoid induction of electromagnetic noise the power supply unit the power switch and the fuse are located at the rear of the housing 2 3 EPMS E 07 Housing The following items are shipped with the EPMS E 07 housing EPMS E 07 cabinet External Power supply PWR 03D Power cord PWR 03D to EPMS E 07 Mains chord Fuse 1 6 A 0 8 A slow Front covers KKK KK The EPMS E 07 housing is designed for low noise operation especially for extracellular and multi channel amplifiers with plugged in filters It operates with an external power supply to minimize distortions
9. gure 2 at 2 a the gt LOWER output will not create a pulse or will produce a long pulse if the pulse width is too wide However in figure 3 the pulse width has been reduced and the pulses are correct In this case the ERROR LED will not light Note The pulse width of the TTL outputs i e gt LOWER must be at least 3 times quicker than the fastest signal to be measured 5 Function of the Window Discriminator IN WINDOW MUX output this output will produce a pulse if the signal crosses the lower level and then exits the window again through the lower level without first crossing the upper level This is valid for PPD and NPD mode this is a multiplexer output The selected lower and upper levels and the amplified input signal are time multiplexed to produce a multi signal voltage output which can be displayed on any analog oscilloscope The multiplexed signal can also be read on a digital oscilloscope however this method is noisy and difficult to read version 2 4 page 9 WD 01 User Manual 6 Waveforms in Dependence of the Input Signal 1 POSITIVE PEAK DETECTION MODE PPD FIG 2 UPPER LEVEL LOWER LEVEL gt LOWER gt UPPER eves eae oe IN WINDOW NEGATIVE _PEAK DETECTION MODE NPDM FIG 3 LOWER LEVEL UPPER LEVEL ss N I M gt LOWER gt UPPER IN WINDOW version 2 4 page 10 WD 01 User Manual 7 Waveforms in Dependence of the Input Signal 2 UPPER LEVEL LOWER LEV
10. in selection of xl x10 x100 pre selection for polarity of the peak detection and independent selection of the polarity for lower level and upper level signals are features that complete this instrument for flexible use in several applications 3 3 Description of the Front Panel wD 01 npi O gt LOWER IN WINDOW gt UPPER WINDOW OUTPUTS TTL O Drawing 1 WD 01 front panel view version 2 4 page 6 WD 01 User Manual In the following description of the front panel elements each element has a number that is related to that in Drawing 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 1 PEAK PEAK switch Switch for selecting the type of peak detection PPDM positive detection mode NPDM negative detection mode 2 0 switch Switch for selecting the polarity of the UPPER LEVEL Note that setting the switch to 0 forces the UPPER LEVEL to zero 3 UPPER LEVEL potentiometer 10 turn potentiometer for setting the value of the UPPER LEVEL Range 10 V Very important The UPPER LEVEL is always set by this potentiometer even if the value set here is less than the value set by the LOWER LEVEL potentiometer 4 PULSE WIDTH trim pot Trim pot for setting the PULSE WIDTH of the window TTL outputs Range 50 us to 5 ms 5 ERROR LED LED which lights if the PULS
11. round connected We recommend that you try both arrangements to determine the best configuration a ZPMS E 07 j The 19 cabinet is connected to the PROTECTIVE EARTH connector at the rear panel The chassis is linked to protective earth only if the PWR 03D is connected It can be connected also to the SYSTEM GROUND SIGNAL GROUND on the rear panel of the instrument see Figure 3 Important Always adhere to the appropriate safety measures Figure 3 Rear panel connectors of the EPMS E 07 2 6 Technical Data 19 rackmount cabinet for up to 7 plug in units Dimensions 3U high 1U 1 3 4 44 45 mm 254 mm deep EPMS 07 Power supply 115 230 V AC 60 50 Hz fuse 2 A 1 A slow 45 60 W EPMS E 07 External power supply for EPMS E 115 230 V AC 60 50 Hz fuse 1 6 0 8 A slow Dimensions of External power supply W x Dx H 225 mm x 210 mm x 85 mm version 2 4 page 5 WD 01 User Manual 3 WD 01 Window Discriminator 3 1 WD 01 Components The following items are shipped with the WD 01 system J Window discriminator module for the EPMS 07 system JV User manual 3 2 System Description The WD 01 is a plug in modular unit for the detection and recording of specific voltage level pulses in a noisy background This is achieved by producing a pulse when the signal s peak is within the lower and upper window levels The window levels are controlled by ten turn potentiometers and can be adjusted to 10 V Ga
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