Metrologic MH941 Manuale utente

METROLOGIC INSTRUMENTS, INC.

MH941 Hand-Held

Laser Scanner

Installation and User’s Guide

MLPN 2183

Printed in USA

October 1998

Locations:

USA Corporate Headquarters Europe

Metrologic Instruments, Inc. Metrologic Instruments GmbH

90 Coles Road Dornierstrasse 2

Blackwood, NJ 08012 82178 Puchheim b.

Customer Service: 1-800-ID-METRO Munich, Germany

Tel: 609-228-8100 Tel: 49-89-89018-0

Fax: 609-228-6673 Fax: 49-89-89019-200

[email protected] [email protected]

www.metrologic.com

ASIA

South America Metrologic Asia (PTE) Ltd.

Metrologic Instruments 31, Kaki Bukit Road 3

Rua Flórida, 1.821-5°Andar-Brooklin #05-08 Techlink

CEP 04571-090, São Paulo-SP, Brasil Singapore 417818

Outside Brazil: Tel: 65-842-7155

Tel: 55-11-5505-6568 Fax: 65-842-7166

Fax: 55-11-5505-1681 [email protected]

[email protected]

In Brazil:

Tel: 55-11-5505-2396

Fax: 55-11-5507-2301

[email protected]

reproduced, transmitted, or stored in any form or by any means without prior written

consent, except by reviewer, who may quote brief passages in a review, or provided for in

the Copyright Act of 1976.

Products and brand names mentioned in this document are trademarks of their respective

companies.

iii

Table of Contents

Introduction and Identification .................................... 1

Unpacking List ................................................. 2

Connecting the MH941 Hand-Held Scanner to the Fixed Scanner and

Host Device ................................................... 3

Connecting the MH941 Hand-Held Scanner to the Decoder/Controller .... 4

Parts of the MH941 Scanner ...................................... 5

Audible Indicators ............................................ 6-9

Visual Indicators ........................................... 10-13

Labels ....................................................... 14

IR Sensor Activation ........................................... 15

Scan Field ................................................... 16

Depth of Field and Symbol Specification ........................ 17, 18

Maintenance .................................................. 19

Appendix A

Specifications ...................................... 20, 21

Appendix B

MH941 Scan Head Pin Assignments .................... 22, 23

Appendix C

Warranty and Disclaimer ............................. 24, 25

Appendix D

Notices ........................................... 26, 27

Appendix E

Patents ............................................... 28

Index .................................................... 29, 30

Introduction and Identification

When using the MH941 scanner with a decoder not manufactured by Metrologic,

scanner operation is dependent upon your decoder. Since there are many decoders

available, refer to your decoder’s documentation concerning scanner

requirements and operation.

When using a Metrologic hand-held scanner with one of Metrologic’s fixed

scanners, the scanner will operate as follows:

!The IR signal extends approximately eight (8) inches beyond the output

window.

!When the unit is activated by the IR sensor, the red LED will remain on.

This is a visual indication that the scanner is beginning a sequence of

bar code recognition, decoding, and transmission.

!When an object is in the scan field, the laser will begin a sweep to

determine if a bar code is present. If a bar code is not detected within

approximately 2.5 seconds, the red LED will shut off indicating that the

laser is no longer on. To reactivate the scanning sequence, remove the

object and present another.

!When a bar code is recognized, the scanner will decode the bar code

and then transmit the data to the host system. When this occurs, the

green LED will flash and the scanner will beep when the decoding is

complete. At this time, the laser will turn off if the object is removed

from the field. However, if the object stays in the field the laser will

remain on for up to 2.5 seconds trying to detect another bar code. This

feature allows very fast consecutive scans of symbols in close proximity,

such as a wall of boxes or cartons, or bar coded menus. If the same

symbol stays in the field after a successful scan, the laser will stay on for

approximately 3.5 seconds and then turns off. This prevents

unintentional reads of the same bar code. To read the same symbol more

than once, simply remove the object from the scan field for

approximately 1 second and then the scanner can scan the same symbol

on the next pass.

Unpacking List

The following will be found in the shipping carton:

!Installation and User’s Guide

!MH941 Hand-Held Laser Scanner

If anything is missing or to order additional items, contact your dealer, distributor

or call Metrologic’s Customer Service Department.

Connecting the MH941 Hand-Held Scanner to the Fixed

Scanner and Host Device

In order for the MH941 scanner to maintain compliance with applicable

standards, all circuits connected to the scanner (Example: power supply, host

system, etc.) must meet the requirements for SELV (Safety Extra Low Voltage)

according to EN60950.

1. Make sure the host system is turned off.

2. Connect the head cable of the MH941 hand-held scanner to the cable

terminated with a 9-pin connector attached to the fixed scanner.

3. There are two ways to connect the fixed scanner to the host device

completely:

!Ifthe fixed scanner will be powered by the host system, connect the

communication cable to the host device.

!If the fixed scanner will be powered by an external power supply, the

socket-outlet can be installed near the equipment and can be easily

accessible. Check the AC input requirements of the power supply to

make sure the voltage matches the AC outlet. Connect the scanner’s

communication cable to the scanner. Connect the cable to the host

device. Power up the scanner by plugging in the power supply.

4. Power up the host system.

Note: When the MH941 scanner first receives power, it will immediately

go through a self diagnostic routine, then the green and red LEDs will

flash, and the unit will beep once.

Figure 1

Connecting the MH941 Hand-Held Scanner to the

Decoder/Controller

In order for the MH941 scanner to maintain compliance with applicable

standards, all circuits connected to the scanner (Example: power supply, host

system, etc.) must meet the requirements for SELV (Safety Extra Low Voltage)

according to EN60950.

Sincethere are many different types of decoders, refer to your decoder’s

documentation to connect the decoder to your host system. For a listing of the

cable pin assignments for the MH941 scanner, refer to the section MH941 Scan

Head Pin Assignments pages 22 and 23.

Figure 2

Parts of the MH941 Scanner

Becoming familiar with the features of the MH941 scanner will help when

operating the scanner. The following illustration and list explain the pertinent

parts.

Laser Output Window Thelaser beam emits from this aperture.

Head Cable Ths cable is terminated with a 9-pin squeeze

connector.

The following functions are decoder /controller dependent.

Green LED When the green light flashes on, the scanner has

read the bar code successfully. When the green

light turns off, communication to the host is

complete.

Red LED When the red light is on, the scanner is ready to

scan.

ScanQuest™ Infrared Thescanner has an energy saving feature known

Object Sensor as ScanQuest that senses when a specified time has

elapsed without any scanning. If the unit remains

dormant for this time, the laser and motor will turn

off. In this stage, the scanner’s computer is on

“stand by.” To reactivate the unit, wave an object in

front of the IR (infrared) sensor or pick up the

scanner and direct the scan window downwards.

When the red light comes on, the scanner is ready

to scan.

Audible Indicators

There are audible indications that signal the status of your scanner. These

indications are dependent upon the decoder being used. The function of these

indications may not work as described below if using a decoder not manufactured

by Metrologic.

When the scanner is in operation, it will provide warnings with audible

indications. These sounds signal the status of the scan and scanner.

One Beep When the scanner first receives power, the red LED

will blink, followed by the green LED, and then the

scanner will emit one beep. After the scanner

performs this startup sequence, the scanner is ready

to scan.

The green LED will flash and beep once when the

unit successfully reads a bar code. If the green LED

does not flash or the scanner does not beep once,

then the bar code has not been successfully read.

Razzberry Tone If, upon power up, the scanner emits a razzberry

tone, then the scanner has failed diagnostics. Report

this problem to the company where the scanner was

purchased.

Signaux acoustiques

Il existe des signaux acoustiques qui vous informent sur l'état du scanner. Ces

signaux dépendent du décodeur que vous utilisez. Il peut arriver que les fonctions

de ces signaux ne correspondent pas à celles qui suivent si vous utilisez un

décodeur qui n'a pas été construit par Metrologic.

Quand le scanner est en service, il émet des signaux acoustiques qui vous

informent sur l'état de palpage et de scanner.

Bip sonore

unique la diode rouge se met d'abord à clignoter, puis la diode verte.

Quand le scanner reçoit pour la première fois de l'énergie,

Ensuite, le scanner émet un bip sonore unique. Une fois cette

séquence de démarrage effectuée, le scanner est prêt à servir.

Après lecture avec succès d'un code barres par le scanner, la

diode verte se met à clignoter, suivie d'un bip sonore unique.

Si la diode verte ne clignote pas ou quand aucun bip sonore

n'est émis, cela signifie que le code barres n'a pas pu être lu

avec succès.

Ronflement Si le scanner émet un ronflement une fois activé, ceci indique

un diagnostic d'erreur. Avisez de ce problème l'entreprise

vous ayant vendu le scanner.

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