Digitimer D188 User manual

Digitimer

D188

REMOTE ELECTRODE SELECTOR

OPERATOR’S MANUAL

For Research Use Only

“Digitimer” is a registered trade mark of Digitimer Limited

Digitimer Ltd –D188 Operator’s Manual Version 1.2

Digitimer Limited

37 Hydeway

Welwyn Garden City

Hertfordshire

AL7 3BE

Tel: +44 (0)1707 328347

Fax: +44 (0)1707 373153

E-mail:

[email protected]

Website: www.digitimer.com

Digitimer Ltd –D188 Operator’s Manual Version 1.2 
 
3 
 
 
 
Table of Contents 
Section 1 General Information .......................................................................................................................5 
D188 Intended Usage & Description ..........................................................................................................5 
Unpacking the D188....................................................................................................................................6 
Supplied Accessories...............................................................................................................................6 
Optional Accessories...............................................................................................................................6 
Mains Connections .....................................................................................................................................6 
Specifications..............................................................................................................................................7 
Section 2 D188 Installation.............................................................................................................................9 
Hardware Overview....................................................................................................................................9 
D188 Front Panel ....................................................................................................................................9 
D188 Rear Panel......................................................................................................................................9 
D188 Digital Input Socket .....................................................................................................................10 
Installing the D188 Control Software........................................................................................................10 
Installing the D188 Remote Electrode Selector Hardware.......................................................................10 
Section 3 Software Overview .......................................................................................................................12 
Introduction..............................................................................................................................................12 
Standby .................................................................................................................................................12 
USB (Manual) Control Mode.................................................................................................................13 
1:1 Digital Control Mode.......................................................................................................................13 
4:8 Digital Control Mode.......................................................................................................................13 
Delay/De-bounce Setting......................................................................................................................13 
LED Control ...........................................................................................................................................13 
Persistent Storage of Settings...............................................................................................................13 
Section 4 System Operation .........................................................................................................................15 
Introduction..............................................................................................................................................15 
Connecting the D188 to an Electrical Stimulator......................................................................................16 
Connecting to a Digitimer DS5, DS7A, DS7AH, DS7R or DS8R Stimulator ............................................16 
Connecting to a Digitimer DS2A, DS3 or DS4 Stimulator......................................................................16 
Connecting to other Stimulators ..........................................................................................................16 
Connecting the D188 to Stimulating Electrodes.......................................................................................16 
Using Multiple D188’s with a Single Stimulus Source...............................................................................17 
Using Manual Control...............................................................................................................................17 
Using External Digital Control...................................................................................................................17 

Digitimer Ltd –D188 Operator’s Manual Version 1.2

1:1 Digital Control.................................................................................................................................17

4:8 Digital Control.................................................................................................................................18

Delay/De-bounce..................................................................................................................................18

Minimum Switching Times & Stimulus Pulse Duration.........................................................................18

Digital Control Voltage Requirements ..................................................................................................19

Using the API for Third Party Software Control........................................................................................19

Example Applications................................................................................................................................19

Application 1: Tactile stimulation of multiple digits (sequentially) across both hands........................19

Digitimer Ltd –D188 Operator’s Manual Version 1.2

Section 1

General Information

D188 Intended Usage & Description

The D188 Remote Electrode Selector can be used to direct electrical stimuli from a single stimulator to

one of up to eight pairs of stimulation electrodes. It is particularly useful in applications where a stimulus

needs to be presented to several stimulation sites, one site at a time, but only one stimulator is available.

Channel selection is controlled by TTL compatible digital inputs applied to the rear panel socket on the

D188 or manually via Windows compatible software (supplied). A pair of stimulus inputs is provided for

connection to a compatible electrical stimulator and there are eight pairs of stimulus outputs (channels),

numbered from 1 to 8, each associated with a green LED to show when they are active. These LED’s can

be turned off for situations where it is important that the subject does not know which channel is active.

Although the D188 has been designed with human applications in mind, the D188 is not a medical device,

so its use is limited to research applications. It should not be used for patient treatment or diagnostic

purposes.

Digitimer Ltd –D188 Operator’s Manual Version 1.2

Unpacking the D188

After unpacking the D188 Remote Electrode Selector from the shipping carton, please inspect each piece

for any sign of shipping damage. Please contact the carrier and your distributor, or Digitimer Limited,

immediately if there is any damage. Do NOT dispose of the shipping carton, as the carrier will want to

examine it in order to process a damage claim. Digitimer Limited and their distributors insure all

shipments to cover shipping damage.

It is also advisable to keep the shipping carton in the event that the instrument needs to be returned for

service.

Supplied Accessories

The following items should have been packed with your D188 Remote Electrode Selector:

12V Switched Mode Power Supply for 100V-240V input with plug adaptor(s).

USB Cable for host PC connection.

Quick Start Guide or Operator’s Manual.

Windows Compatible D188 Control App Software, including API for third party software control

(supplied on USB Stick).

Digital Communication Cable (1m long, 15-way “D” connector to 10 tinned wires).

Optional Accessories

D185-OC1 4mm Plugs (pair of 4mm touch proof plugs, compatible with the outputs on

Digitimer DS5, DS7A, DS7AH Isolated Stimulators).

NL844P Plugs (1.5mm DIN42802 plugs, available in red and black).

D185-HB4 Output Extension Cable (4mm touch proof plugs to 1.5mm touch proof sockets).

NL985P 2mm Plugs (pair of 2mm touch proof plugs for use with Digitimer DS2A, DS3 and DS4

Isolated Stimulators).

Stimulator connection cables: D188-09 (female 1.5mm touch-proof, 2m), D188-10 (female

1.5mm touch-proof, 50cm), D188-11 (2mm male touch-proof to 1.5mm female touch-proof,

50cm) and D188-12 (4mm male touch-proof to 1.5mm female touch-proof, 50cm.

Output Extension Cables: D188-13 (1m long) and D188-14 (2m long). Supplied in pairs for

extending the length of electrode leads fitted with 1.5mm DIN42802 touch-proof connectors.

Mains Connections

The D188 is shipped with a 100V-240V input power supply and plug adaptor plates for UK, European

(Schuko) or North American wall sockets. For countries that do not use one of these types of socket, we

recommend obtaining a compatible travel adaptor.

Digitimer Ltd –D188 Operator’s Manual Version 1.2

Specifications

Maximum Stimulus Input Voltage: 400V.

Maximum Stimulus Input Current: 1A.

Minimum Switching Interval: 1ms.

Digital Input Requirements: TTL Logic (5V).

Front Panel Connections:

Common (COM) Inputs: One red, one black 1.5mm DIN 42802 male sockets.

Stimulus Outputs: 8 pairs of red and black 1.5mm DIN 42802 male sockets.

Rear panel Connections:

USB Input (Type B Socket) for Win PC software control/setup.

Power Supply Input Socket

Digital Communication Socket (15-way Female “D” Connector).

Indicators:

8 Green LEDs –One per channel used to indicate the active channel.

Control Software:

Supplied on USB drive. Compatible with Windows 7 or higher.

Weight & Dimensions:

Size: 152 x 55 x 178 mm (w x h x d).

Weight: 500g (approx.).

Environmental:

Operating Range 10°C to 40°C 30 to 75%, non-condensing.

Storage Range -40°C to 70°C 10 to 100%, non-condensing.

Transport Range -40°C to 70°C 10 to 100%, non-condensing.

Digitimer Ltd –D188 Operator’s Manual Version 1.2

Section 2

D188 Installation

Hardware Overview

D188 Front Panel

D188 Rear Panel

LED Indicator

Electrode Connection Sockets

(8 pairs)

Stimulator Input Sockets (one pair)

USB “B” Socket

15-way Digital

Input Socket

12V Power Input

Socket

Digitimer Ltd –D188 Operator’s Manual Version 1.2

D188 Digital Input Socket

The D188 is fitted with a 15-way female “D” connector which is used for digital control. Digitimer

supplies a cable with the unit which has 10 tinned wires for user connection to a digital output device

fitted with screw terminals. The wiring details for the socket and cable are given below.

Function (Colour)

D0 (Black)

D5 (Green)

D1 Brown

D6 (Blue)

D2 (Red)

D7 (Violet)

D3 (Orange)

+5V (White)

D4 (Yellow)

GND/Cable Screen

(Grey/Black)

Note that pins 11 to 15 are unused. A +5V pin is made available for anyone wishing to use this for button

control of the D188 and is not needed for digital control.

Installing the D188 Control Software

The D188 Control Software is supplied on a USB flash drive and is compatible with personal computers

running Microsoft Windows 7 or higher.

1. Insert the USB stick and browse to the contents.

2. Double click on the D188 software installer file (*.exe) and follow in the installation prompts to

completion.

Installing the D188 Remote Electrode Selector Hardware

Once the software has been installed on the host PC, the D188 can be connected to the computer.

1. Connect the supplied USB cable between the D188 and a free USB port on the host PC.

Table of contents

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