WPI DS8000 Manuale utente

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DS8000

Digital stimulator

INSTRUCTION MANUAL

Serial No._____________________

042712

World Precision Instruments

www.wpiinc.com

WORLD PRECISION INSTRUMENTS iii

DS8000

CONTENTS

1.0 Introduction ................................................................................................................................................1

2.0 General Warnings and Cautions ..........................................................................................................3

Unpacking ..........................................................................................................................................................4

3.0 Description .................................................................................................................................................5

3.1 General .......................................................................................................................................................5

3.2 Microcontroller .........................................................................................................................................5

3.3 Communications ......................................................................................................................................5

3.4 Digital Control & Digital Signal Processing (DSP) ............................................................................5

3.5 Analog Outputs .........................................................................................................................................6

3.7 Rear Panel Connections .........................................................................................................................7

3.8 Block Diagram ..........................................................................................................................................9

4.0 Installation .............................................................................................................................................. 10

4.1 Mechanical ............................................................................................................................................. 10

4.2 Electrical .................................................................................................................................................. 10

4.3 Network ................................................................................................................................................... 10

4.4 Quick Start Operation .......................................................................................................................... 10

5.0 Operation ................................................................................................................................................ 14

5.1 General Parameters .............................................................................................................................. 14

5.2 Channel Screen ...................................................................................................................................... 14

5.3 Trigger and Mode Screen Detail ....................................................................................................... 16

5.4 Train Screen Detail ................................................................................................................................ 17

5.5 Paired Pulse Modes Overview ........................................................................................................... 19

5.6 Paired Mode Screen Detail ................................................................................................................. 20

5.7 T-Paired Mode Screen Detail .............................................................................................................. 22

5.8 Waveform Screen Detail ..................................................................................................................... 24

5.9 Timer Screen .......................................................................................................................................... 26

5.10 Run Screen ........................................................................................................................................... 27

5.11 Combined Analog Screen ................................................................................................................. 27

DS8000

WORLD PRECISION INSTRUMENTSiv

5.12 Combined TTL Screen ....................................................................................................................... 28

5.13 Scope Screen ....................................................................................................................................... 28

5.14 Settings Screen .................................................................................................................................... 29

5.15 General Screen .................................................................................................................................... 30

5.16 GUI Screen ........................................................................................................................................... 31

5.17 Memory Screen ................................................................................................................................... 33

5.18 Proﬁle Screen ....................................................................................................................................... 33

5.19 Communication Screen .................................................................................................................... 34

5.20 FTP Screen ............................................................................................................................................ 34

5.21 About Screen ....................................................................................................................................... 35

6.0 Serial & Network Communication .................................................................................................... 36

6.1 Network Hardware Setup .................................................................................................................... 36

6.2 Serial and Network Control ................................................................................................................ 38

6.3 Custom Waveform Via the Custom Table Loader Program ........................................................ 47

6.4 Custom Waveform Via the Excel® Macro ...................................................................................... 49

7.0 Maintenance ........................................................................................................................................... 52

7.1 Cleaning Instructions ............................................................................................................................ 52

7.2 Scratch Prevention ................................................................................................................................ 52

8.0 Troubleshooting ..................................................................................................................................... 53

Replacing the fuse ........................................................................................................................................ 53

FTP Error Codes ............................................................................................................................................. 53

9.0 Technical Speciﬁcations ...................................................................................................................... 54

9.1 General Speciﬁcations ......................................................................................................................... 54

9.2 Software ................................................................................................................................................... 55

10.0 Appendix 1: Stimulus Isolator Applications Cookbook ............................................................ 57

11.0 Appendix 2: Example Bioresearch Applications ......................................................................... 61

Warranty ......................................................................................................................................................... 63

reproduced or translated into any language, in any form, without prior written permission of World Precision

Instruments, Inc.

WORLD PRECISION INSTRUMENTS 1

DS8000

1.0 INTRODUCTION

WPI’s DS8000 Digital Stimulator is compact and high-precision state-of-the-art equipment. It is

built in accordance with the latest standards in digital and analog electronics technology. The

DS8000 is a full menu driven touch screen sensitive input stimulator. This LCD screen displays

the menus and

enables the user

to select options

or enter data using

built-in keypads. A

password-protected

hierarchical

structure limits

privileges for

different users

and owner(s); the

administrator always has full control over all parameters. DS8000 ﬁrmware and/or parameter

memories can be exported to or imported from a PC using standard ﬁle transfer protocol (FTP)

for easy and centralized updates.

The DS8000 has eight identical channels and all channels are functionally independent. Each

channel has three outputs: Combined TTL (Transistor-Transistor Logic or CMOS compatible),

Analog and Combined Analog. The combined analog and combined TTL outputs can give the

sum of the signals from any combination of channels. Each output has its own BNC connector,

providing a total of 24 BNC outputs on the front panel. Any channel can be set to use one of

the pre-deﬁned waveforms, edit a simple 12-point waveform, or create and import one with

1024- point resolution using the custom waveform loader supplied with the DS8000. The

amplitude and duration of the pulse and how often it repeats can be adjusted from the channel

menu. Each channel output signal can be started by using a trigger from any of the TTL channel

outputs, one of the eight external inputs, an internal timer, or manually. The three built-in

internal timers (with optional alarms) provide each channel independent controlled triggers and

also starting or stopping of any of the three timers synchronously or asynchronously.

A wide variety of signals can be easily conﬁgured and generated via the touch screen panel.

The outputs available are unipolar pulses, bipolar pulses, sine, ramp, stepped, paired pulse and

customized waveforms. All the parameter settings can be DS8000 stored in up to four different

user memories to ensure quick installation and start-up. The parameters ﬁle can be uploaded

or downloaded to a host computer and archived for GCP/GLP (Good Clinical Practices/Good

Laboratory Practices) compliance. A built in oscilloscope permits observation of any of the

DS8000

WORLD PRECISION INSTRUMENTS2

signals generated by the DS8000. It displays two channels simultaneously and can be triggered

by any of the internal signals or by one of the external inputs.

The DS8000 is a highly advanced technical instrument with numerous functions and operating

modes. Some users may ﬁnd that the Quick Start procedure is sufﬁcient for their understanding

and other features will become familiar with hands-on experience at using the various on-

screen menus.

The manual may be routinely revised to take account of any software upgrades. In the

meantime, if you need assistance with the DS8000 we would appreciate your call (tel.: 941-

371-1003, or email the Technical Specialist directly at ds8000@wpiinc.com).

WORLD PRECISION INSTRUMENTS 3

DS8000

2.0 GENERAL WARNINGS AND CAUTIONS

WARNING: THE DS8000 DIGITAL STIMULATOR MUST ONLY BE USED IN A DRY

ROOM.

WARNING: THE DS8000 DIGITAL STIMULATOR MUST ALWAYS BE GROUNDED.

WARNING: DO NOT CONNECT ANY INPUT/OUTPUT TERMINAL TO

THE MAINS SUPPLY, UNLESS THROUGH AN ISOLATION CIRCUIT.

CAUTION: Exercise care in using the touch-sensitive LCD screen. It is designed for ﬁnger-

pressure only. DO NOT touch with pen, pencil, or any sharp object. THE LCD SCREEN IS NOT

COVERED UNDER THE INSTRUMENT WARRANTY.

CAUTION: The Digital Stimulator output defaults on start-up in the off condition. Outputs

are unstable during power initialization. Please ensure proper sequencing of power up and

connections to avoid unwanted stimulation to the subject.

CAUTION: The maximum input voltages must not be exceeded. CAUTION: Repairs of an

electrical or mechanical nature may only be carried out by an authorized WPI technician.

NOTE: WPI reserves the right to adapt the equipment to the latest technical speciﬁcations at

any time.

Restrictions: This device may not be used for clinical treatment of humans.

DS8000

WORLD PRECISION INSTRUMENTS4

Unpacking

The DS8000 Packing list is as follows:

• Instruction Manual (this document)

• Quick Start card (Section 4 of the manual)

• 6-foot (2m) BNC cables WPI P/N 2851 (four)

• 90 degree BNC adaptors WPI P/N 500256 (four)

• 9-pin Serial cable WPI P/N 13555

• Network crossover cable (for stand alone networking only)

• Power cord (3006 US, 3301 EURO, 3302 UK, or 14088 AUS)

• Standard stylus

• Spare touch screen protective cover

• Touch screen warning label

• CD-ROM containing: (for GLP/ GCP archiving purposes)

Instruction Manual in PDF format

Quick Start Card in PDF format

Latest ﬁrmware version for DS8000

FTP shareware program

Excel macro based custom waveform loader and additional installation ﬁles (if

needed) (Ofﬁce 2000 use only)

Stand alone executable custom waveform loader CTG 0.1.0.exe

WORLD PRECISION INSTRUMENTS 5

DS8000

3.0 DESCRIPTION

3.1 General

The DS8000 Digital Stimulator is an 8-channel stimulator intended to control a wide range of

stimulus isolation units. All of these parameters (duration, amplitude, interpulse intervals, delay)

can be independently set for each channel.

The analog signals are real-time converted digital values (24-bit resolution) and processed by a

DSP. After processing, the digital signals are real-time converted to analog signals and applied

to the output sockets. The output signal of each channel is available at a front panel connector

and can also be viewed on the graphical display.

The DS8000 is full menu driven. The touch screen LCD shows the menus and enablesthe

operator to select or enter data. A password protected hierarchical structure limits the privileges

for users and owners; the administrator always has full control over all parameters of the

DS8000. The DS8000 ﬁrmware, and/or parameter memories, can be exported to or imported

from an FTP server for easy and centralized updates.

An Ethernet port and an RS-232 port are provided to support communication with computers

and networks.

The DS8000 can be used in laboratory automation systems. Two bi-directional data connectors

are provided, each with three 8-bit ports. These ports can be used to monitor external switches

or digital signals and to control relays or external digital systems.

3.2 Microcontroller

The microcontroller controls the Digital Control & Digital Signal Processing (DSP), the

Communication Controller and the touch screen. Please refer to the block diagram (Fig. 3).

3.3 Communications

The communication controller performs the OSI level 2 of the serial port, the Ethernet port,

while the micro controller controls the higher-level OSI layers. The serial port as well as the

Ethernet (TCP/IP) connections enable remote control by a computer. Please refer to the Rear

Panel connections (Fig. 2).

3.4 Digital Control & Digital Signal Processing (DSP)

The digitized outputs are controlled by the Digital Signal Processor using algorithms imbedded

in the processor. The DSP generates digital data for the pulses and processes the internal and

external controls (Remote control, Computer control) signals.

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