Dell MH941 User Manual

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: [phone] Tel: [phone]
Fax: [phone] Fax: [phone]
[e-mail] [e-mail]
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: [phone]
Tel: [phone] Fax: [phone]
Fax: [phone] [e-mail]
[e-mail]
In Brazil:
Tel: [phone]
Fax: [phone]
[e-mail]

Copyright

© 1998 by Metrologic Instruments, Inc. All rights reserved. No part of this work may be

®

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.

ii

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

iii

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.

1

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.

2

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:

! If the 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.

3

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.

Since there 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 1

4

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 The laser beam emits from this aperture.

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

Figure 2

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 The scanner 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.

5

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.

6

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

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

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

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.

7

Akustische Anzeigen

Es sind akustische Anzeigen vorhanden, die Ihnen Aufschluß über den
Scannerstatus geben. Diese Anzeigen sind abhängig von dem von Ihnen
verwendeten Dekodierer. Es kann sein, daß die Funktionen dieser Anzeigen nicht
den nachfolgend angegebenen entsprechen, falls Sie einen Dekodierer
verwenden, der nicht von Metrologic hergestellt wurde.

Ist der Scanner in Betrieb, so sendet er akustische Signale aus. Diese Signale
geben Ihnen Aufschluß über den Abtast- und Scannerstatus.

Einmaliges Piep-

Wenn dem Scanner erstmalig Energie zugeführt wird,

Signal blinkt zunächst die rote Leuchtdiodenanzeige auf,

gefolgt von der grünen Leuchtdiodenanzeige und
anschließend sendet der Scanner ein einmaliges
Piep-Signal aus. Nach Ausführung dieser Startsequenz
durch den Scanner ist der Scanner für den Abtastvorgang
bereit.

Nach erfolgreichem Lesen eines Barcodes durch das
Gerät blinkt die grüne Leuchtdiodenanzeige auf, gefolgt
von einem einmaligen Piep-Signal. Falls die grüne
Leuchtdiodenanzeige nicht aufblinkt oder der Scanner
kein einmaliges Piep-Signal von sich gibt, bedeutet dies,
daß der Barcode nicht erfolgreich gelesen werden konnte.

Brummton

Sendet der Scanner in eingeschaltetem Zustand einen
Brummton aus, so deutet dies auf eine Fehlerdiagnose
hin. Unterrichten Sie die Firma, bei der Sie den Scanner
gekauft haben, über dieses Problem.

8

Segnali acustici

Sono previsti dei segnali acustici che Vi informano sullo stato dello scanner.
Questi segnali dipendono dal decodificatore da Voi utilizzato. Se utilizzate un
decodificatore che non è stato fabbricato dalla Metrologic è possibile che le
funzioni di questi segnali non corrispondano a quelle qui di seguito indicate.

Se lo scanner è in funzione esso emette segnali acustici. Questi segnali Vi
informano sullo stato della scansione e dell’apparecchio.

Segnale beep

Quando lo scanner viene alimentato per la prima volta,

unico lampeggia dapprima il diodo luminoso rosso e quindi

quello verde. Poi lo scanner emette un unico segnale beep.
Dopo l’esecuzione di questa sequenza di avvio da parte dello
scanner esso è pronto per l’operazione di scansione.

Dopo la lettura riuscita di un codice a barre da parte dello
scanner il diodo luminoso verde lampeggia e quindi viene
emesso un unico segnale beep. Se il diodo luminoso verde
non lampeggia oppure lo scanner non emette il segnale beep,
ciò significa che la lettura del codice a barre non è riuscita.

Segnale acustico
ronzante

Se, allo stato inserito, lo scanner emette un segnale ronzante,
ciò significa che è stata riconosciuta un’anomalia. Informate
la ditta presso la quale avete acquistato lo scanner circa
questo problema.

9

Visual Indicators

There are visual 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 a decoder not manufactured by
Metrologic is being used.

Located at the top of the scanner are two LEDs: red and green. The flashing or
stationary lights of the LEDs signal the status of the scan and scanner.

No Red or Green Light There are two reasons why the two LEDs will not be

illuminated. If the scanner is not receiving power
from the host or transformer, then the lights will not
be on. If the scanner is receiving power and the lights
are not on, then the scanner has remained dormant for
a specified time and the laser and motor has turned
off. To reactivate the unit, wave an object in front of
the IR sensor or pick up the scanner and direct the
scan window downwards.

Red Flash; When the scanner first receives power; the red LED
Green Flash; will blink, followed by the green LED, and then the
Stationary Red scanner will emit one beep. After the scanner

performs this startup sequence, the red LED will
remain on for a specified time indicating that the
scanner is ready to scan. If an object is not presented
to the scanner, the red light will turn off.

Stationary Red When an object is in front of the output window, the

red LED will remain on indicating that the scanner is
ready to scan.

Stationary Red; When the scanner successfully reads a bar code,
Green Flash the green LED will flash and beep once. If the green

LED does not flash or the scanner does not beep once,
then the bar code has not been successfully read.

Repetitive Red Flashes When the red LED flashes several times while it lays

upon a stationary surface, then an object is within the
scan field and is activating the IR sensor. This can
occur even while the scanner is lying upon the counter
or cradle. To eliminate this disturbance, direct the
scan window toward a different location.

10

Signaux optiques

Il existe des signaux optiques 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.

Sur la partie supérieure du scanner se trouvent une diode LED rouge et une diode
LED verte. Les diodes rouge et verte clignotantes ou allumées vous informent sur
l'état de palpage et de scanner.

Ni la diode
rouge, ni la
diode verte
n'est allumée

Diode rouge
clignotante;
diode verte
clignotante;
diode rouge
reste allumée

Diode rouge
reste allumée

Diode rouge
reste allumée;
diode verte
clignotante

Clignotement
répété de la
diode rouge

Il arrive fréquemment que les deux diodes ne s'allument pas.
Pour deux raisons. Les diodes ne s'allument pas quand le scanner
nereçoit de l'énergie ni de l'ordinateur central, ni du transformate
ur. Quand le scanner reçoit de l'énergie et ne s'allume cependant
pas, le scanner est resté pendant une certaine période sans être
utilisé et le laser et le moteur sont désactivés. Pour réactiver
l'unité, déplacer un objet devant le palpeur infrarouge ou prendre
le scanner et diriger la fenêtre de palpage vers le bas.

Quand le scanner reçoit pour la première fois de l'énergie, la
diode rouge se met d'abord à clignoter, puis la diode verte.
Ensuite, lescanner émet un bip sonore unique. Une fois cette
séquence dedémarrage effectuée, la diode rouge reste allumée
pendant un certain temps indiquant que le laser est prêt à servir.
Quand le scanner nedétecte aucun objet, la diode rouge s'éteint.

Quand un objet se trouve devant la fenêtre de palpage, la diode
rouge reste allumée et indique que 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.

Quand la diode rouge clignote plusieurs fois pendant que
l'appareil repose sur une surface non déplacée, un objet
activant le palpeur infrarouge se trouve devant la fenêtre de
palpage. Ceci peut se produire même quand le scanner se
trouve sur une table ou un reposoir. Pour éliminer ce défaut,
positionner le scanner de façon différente.

11

Optische Anzeigen

Es sind optische Anzeigen vorhanden, die Ihnen Aufschluß über den Scannerstatus geben.
Diese Anzeigen sind abhängig von dem von Ihnen verwendeten Dekodierer. Es kann sein,
daß die Funktionen dieser Anzeigen nicht den nachfolgend angegebenen entsprechen, falls
Sie einen Dekodierer verwenden, der nicht von Metrologic hergestellt wurde.

Auf der Oberseite des Scanners befinden sich zwei Leuchtdiodenanzeigen: eine rote und
eine grüne. Die blinkenden bzw. feststehenden Leuchtdiodenanzeigen geben Aufschluß
über den Abtast- und Scannerstatus.

Weder rote noch
grüne Leuchtanzeige

Rote Blinkanzeige;
Grüne Blinkanzeige; zunächst die rote Leuchtdiodenanzeige auf, gefolgt von der
feststehende rote grünen Leuchtdiodenanzeige, und anschließend sendet der
Leuchtanzeige Scanner ein einmaliges Piep-Signal aus. Nach Ausführung

Feststehende rote
Leuchtanzeige

Feststehende rote
Leuchtanzeige; grüne blinkt die grüne Leuchtdiodenanzeige auf, gefolgt von einem
Blinkanzeige einmaligen Piep-Signal. Falls die grüne Leuchtdiodenanzeige

Es kommt häufig vor, daß die beiden Leuchtdiodenanzeigen
nicht aufleuchten. Dafür gibt es zwei mögliche Gründe. Die
Anzeigen leuchten nicht, wenn der Scanner weder vom
Hostrechner noch vom Transformator Energie erhält. Erhält
der Scanner Energie, und die Anzeigen leuchten dennoch
nicht auf, so ist der Scanner für einen bestimmten Zeitraum
untätig geblieben, und Laser und Motor sind abgeschaltet.
Zur Reaktivierung der Einheit sollten Sie ein Objekt vor
dem Infrarot-Sensor hin- und herbewegen oder den Scanner
aufnehmen und das Abtastfenster nach unten richten.

Wenn dem Scanner erstmalig Energie zugeführt wird, blinkt

dieser Startsequenz leuchtet die rote Leuchtdiodenanzeige für
einen bestimmten Zeitraum auf und zeigt an, daß der Scanner
zur Durchführung des Scannens bereit ist. Wird dem Scanner
kein Objekt präsentiert, so erlischt die rote Leuchtanzeige.

Befindet sich ein Objekt vor dem Ausgabefenster, so leuchtet
die rote Leuchtdiode weiterhin auf und zeigt an, daß der
Scanner zur Durchführung des Abtastvorgangs bereit ist.

Nach erfolgreichem Lesen eines Barcodes durch den Scanner

nicht aufblinkt oder der Scanner kein Piep-Signal aussendet,
bedeutet dies, daß der Barcode nicht erfolgreich gelesen werden
konnte.

Wiederholte rote
Blinkanzeigen

12

Blinkt die rote Leuchtdiodenanzeige mehrmals auf, während
das Gerät auf einer nichtbewegten Fläche liegt, so befindet sich
ein Objekt innerhalb des Abtastfeldes, das den Infrarot-Sensor
aktiviert. Dies kann selbst dann vorkommen, wenn der Scanner
auf dem Ladentisch oder dem Ablagegestell liegt. Um diese
Störung zu beseitigen sollten Sie den Scanner anders
positionieren.

Segnali ottici

Sono previsti dei segnali ottici che Vi informano sullo stato dello scanner. Questi segnali
dipendono dal decodificatore da Voi utilizzato. Se utilizzate un decodificatore che non è
stato fabbricato dalla Metrologic è possibile che le funzioni di questi segnali non
corrispondano a quelle qui di seguito indicate.

Sulla parte superiore dello scanner si trovano due diodi luminosi: uno rosso e uno verde.
I diodi luminosi, che possono o essere accesi in continuazione o lampeggiare, Vi informano
sullo stato della scansione e dell’apparecchio.

Né il diodo luminoso rosso né quello verde sono accesi

Succede spesso che i due diodi luminosi non siano accesi. Vi sono due cause possibili. Se
lo scanner non viene alimentato né dal calcolatore host né dal trasformatore, i diodi
luminosi non sono accesi. Se invece lo scanner viene alimentato e ciònonostante i diodi
luminosi non sono accesi, lo scanner è rimasto disattivato per un determinato periodo e
laser e motore sono spenti. Per riattivare l’unità dovreste muovere un oggetto davanti al
sensore a infrarossi oppure prendere lo scanner e rivolgere il finestrino di scansione verso
il basso.

Il diodo luminoso rosso lampeggia; il diodo luminoso verde lampeggia; il diodo l­uminoso verde è acceso

Quando lo scanner viene alimentato per la prima volta, lampeggia dapprima il diodo
luminoso rosso e quindi quello verde. Poi lo scanner emette un unico segnale beep. Dopo
l’esecuzione di questa sequenza di avvio, il diodo luminoso rosso si accende per un
determinato periodo ed indica che il laser è pronto per effettuare una scansione. Se allo
scanner non viene presentato nessun oggetto, il diodo luminoso rosso si spegne.

Il diodo luminoso rosso è acceso

Se un oggetto si trova davanti al finestrino di uscita, il diodo luminoso continua ad essere
acceso indicando così che lo scanner è pronto per effettuare una scansione.

Il diodo luminoso rosso è acceso; il diodo luminoso verde lampeggia

Dopo la lettura riuscita di un codice a barre da parte dello scanner il diodo luminoso verde
lampeggia e quindi viene emesso un unico segnale beep. Se il diodo luminoso verde non
lampeggia oppure lo scanner non emette un segnale beep, ciò significa che la lettura del
codice a barre non è riuscita.

Il diodo luminoso rosso lampeggia ripetutamente

Se il diodo luminoso rosso lampeggia ripetutamente mentre l’apparecchio si trova su una
superficie immobile, vi è un oggetto all’interno della zona di scansione che attiva il sensore
a infrarossi. Ciò può essere addirittura il caso quando lo scanner si trova sul banco oppure
nel suo supporto. Per eliminare questa anomalia basta cambiare la posizione dello scanner.

13

Labels

The MH941 is a CDRH Class II laser system and an IEC Class I Laser System.
Your unit will have a CDRH Class II caution label and an LASERKLASSE 1
label affixed below the model number. The model number label is found on the
bottom of the scanner’s head. Found directly below the output window at the front
of your unit is a red avoid exposure label. The following are examples of these
labels:

The model number includes the scanner number and revision level. For example,
if the model number is MH941J, the scanner is an MH941 and J is the revision
level.

14

IR Sensor Activation

This function is decoder/controller dependent.

The scanning process is initiated by an infra red (IR) device that is found
below the laser output window. The signal it projects extends approximately
eight (8) inches beyond the output window (Refer to Figure 3). The IR device
remains active as long as power is applied to the unit.

When the unit remains dormant for a time, the laser 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 sensor or pick up the scanner and direct the output window
downwards. The function of the scanning process in conjunction with the IR
sensor is known as ScanQuest.

Figure 3

15

Scan Field

The depth of field for the scanner is from the face of the output window to five
(5) inches (Refer to Figure 4). If the scanner is in the stand, a bar code must be
presented to the scanner. When holding the scanner, position the output
window within five inches of the bar code.

16

Figure 4

Depth of Field and Symbol Specification

(Refer to Figure 5)

Code Type Minimum Small Code Density *Depth of Field

Element

Mil. (1/1000")

UPC/EAN 10.4 80% 0" - 4"
UPC/EAN 13.0 100% 0" - 5"
Code 39 7.5 High 0" - 3"
Code 39 12.0 Medium 1" - 5"
Code 39 21.0 Low 1" - 8"
I 2 of 5 7.5 High 0" - 3"
I 2 of 5 12.0 Medium 0" - 5"
I 2 of 5 21.0 Low 1" - 8"
Codabar 7.5 High 0" - 3"
Codabar 12.0 Medium 0" - 5"
Codabar 21.0 Low 1" - 8"
Code 93 10.4 80% 0" - 4"
Code 93 13.0 100% 0" - 5"
Code 128 10.4 80% 0" - 4"
Code 128 13.0 100% 0" - 5"

Subject to change.

*Decoder/controller dependent.

17

18

Figure 5

Maintenance

Smudges and dirt can interfere with the proper scanning of a bar code.
Therefore, the output window will need occasional cleaning.

1. Spray glass cleaner onto lint free, non-abrasive cleaning cloth.

2. Gently wipe the scanner window.

19

Appendix A

Specifications

Application: Hand-Held Laser Scanner
Light Source: VLD 675 ± 5nm
CDRH: Registered with CDRH, Class II laser product

Maximum radiant power less than 1 mW

IEC: IEC 825 Class I laser product

Maximum radiant power less than 0.5 mW

UL/CSA/TUV: UL Listed, UL114; CSA certified, C22.2 No. 950, UL

1950 (1989); ]

EMI: Complies with FCC & VDE Class A

Mechanical

Dimensions: 205mmL x 63mmW x 24mmD

(8"L x 2.5"W x .94"D)
Weight: .18 kg. (6.4 oz.) without cable
Cable Length: Coil cord collapsed - 3.5'; Extended - 6'

Electrical

Power (Watts): 0.5
Input Voltage, DC: 5 V
Operating Current: .100 Amps
Standby Current: .025 Amps

20

Operational

Depth of Field, UPC 100%: Up to 125mm (5") from face
Scan Speed: 38 scan lines per second
Scan Pattern: Single scan line
Maintenance Required: Clean output window periodically
Print Contrast: 35% minimum reflectance difference
Roll, Pitch, Yaw: 42E, 68E, 52E

The following operations are decoder/controller dependent.

Beeper Operation: Beeps on “Decode” or “Good Read”
Decode Capability: Decode controlled by MC941

decoder/controller or host system

Indicators: LED: red = laser on, ready to scan

green = good read, decoding

Specifications subject to change without notice.
U.S. Patent D31590; 5,340,971; 5,340,973 and 5,260,553

Environmental

Storage Temperature: -40EC to 60EC (-40EF to 140EF)
Operating Temperature: 0EC to 35EC (32EF to 95EF)
Humidity: 5% to 95% relative humidity, non-condensing
Light Levels: Up to 3200 foot candles; works in direct

sunlight
Ventilation: None required
Shock: Drop of 1.5 meters (5')
ESD: 8 kV IEC 801-2
Contaminants: Sealed to resist airborne particulate

contaminants

21

Appendix B

MH941 Scan Head Pin Assignments

Pin Signal Name Function

1 Flip Sense A square wave output signal that changes polarity

when the scan mirror drive circuit changes the
motor direction. The frequency is approximately
19 Hz to achieve a nominal 38 flips/scan per
second.

Note: The polarity and mirror direction do not

necessarily change at the same time.

This is an open collector output capable of sinking
25 mA via an external pull up resistor connected
to a voltage not to exceed +20 VDC.

2 Data An output digital representation of the scanned bar

code. A low level represents a bar and a high level
represents a space.

This is an open collector output capable of
sinking 25 mA via an external pull up resistor
connected to a voltage not to exceed +20 VDC.

3 Decode LED The scan head is equipped with LED and beeper

assemblies. A +5 VDC to 12 VDC input to the
head at this pin will light the green LED and if
oscillated at about 2 KHz, drive a beeper.

This should be supplied with no more than 30mA
of current.

Typically, this is used to indicate a decode has
occurred.

22

4 Reserved
5 Proximity Detect The proximity detect is a momentary

grounding switch. The controlling computer
should provide a +5±.25 VDC pull up
which can be grounded when the proximity
detect activates.

This indicates that an object has moved
within scanning rage. It is recommended
that this signal be debounced for approx­imately 30 milliseconds.

Note: This scan head was not designed

to have the laser enabled
continuously as might be desired if
the scanner was in a permanent
mounting fixture.

6 Laser/Motor Control A +5 VDC input to the head which is used

to start the flipper motor and signal
processor, and enable the visible laser
diode (VLD). This can be a TTL level
signal and requires less than 1 milliampere
of current.

7 Ground A power ground capable of handling a 500

milliampere load.

8 SHIELD Cable shield to chassis ground (no load).
9 Scanner VCC Primary laser diode/motor power input. +5

VDC should be present at this pin and
capable of supplying up to 125 mA when
enabled by the signal at pin 6.

23

Appendix C

Warranty and Disclaimer

Limited Warranty

Products manufactured by Metrologic have a 2-year limited warranty from date of
manufacture.

This warranty is limited to repair, replacement or refund at Metrologic’s discretion.
Faulty equipment must be returned to the Metrologic facility in Blackwood, New Jersey
or Puchheim, Germany. To do this, contact Metrologic Customer Service/Repair for a
Returned Material Authorization (RMA) number.

In the event that it is determined that the equipment failure is covered under the
warranty, Metrologic shall, as its sole option, repair, replace with a functionally
equivalent unit, or refund an amount equal to the purchase price to the original
purchaser, whether distributor, dealer/reseller, or retail consumer, and return the
equipment to the customer without charge for service or return freight.

This limited warranty does not extend to any Product which, in the sole judge-ment
of Metrologic, has been subjected to misuse, neglect, improper installation or
accident, nor does it extend to any Product which has been repaired or altered by
anyone who is not a Metrologic authorized representative.

THIS LIMITED WARRANTY, EXCEPT AS TO TITLE, IS IN LIEU OF ALL
OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE,
ARISING BY LAW, CUSTOM OR CONDUCT. THE RIGHTS AND
REMEDIES PROVIDED HEREIN ARE EXCLUSIVE AND IN LIEU OF ANY
OTHER RIGHTS OR REMEDIES. IN NO EVENT SHALL METROLOGIC BE
LIABLE FOR INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
INCLUDING, WITHOUT LIMITATION, ANY INJURY TO PROPERTY OR
PERSON OR EFFECT ON BUSINESS OR PROFIT, AND IN NO EVENT
SHALL ANY LIABILITY OF METROLOGIC EXCEED THE ACTUAL
AMOUNT PAID TO METROLOGIC FOR THE PRODUCT.

Metrologic Instruments, Inc. Customer Service Department
90 Coles Road 1-800-ID-METRO (1-800-436-3876)
Blackwood, NJ 08012 TEL: [phone]

FAX: [phone]
Metrologic Instruments GmbH
Dornierstrasse 2
82178 Puchheim b.
Munich, Germany
TEL: [phone]
FAX: [phone]

24

Disclaimer

Metrologic Instruments, Inc. and the author or authors make no claims or warranties with respect
to the contents or accuracy of this publication, or the product it describes, including any warranties
of fitness or merchantability for a particular purpose. Any stated or expressed warranties are in
lieu of all obligations or liability for any damages, whether special, indirect, or consequential,
arising out of or in connection with the use of this publication or the product it describes.
Furthermore, the right is reserved to make any changes to this publication without obligation to
notify any person of such changes. Metrologic also reserves the right to make any changes to the
product described herein.

Exclusion des responsabilités

Metrologic Instruments, Inc. et le/les auteur(s) ne sont ni garants, ni responsables pour l­'exhaustivité et la correction des informations contenues dans cette brochure - que ce soit r­elativement à leur teneur et à l' exactitude - ou pour le produit qui y est décrit. Ils ne sont en outre
responsables d'aucune garantie de propriété ou de qualité pour un usage particulier. Toutes les
assurances nommées ou exprimées excluent toute garantie ou responsabilité pour les dommages
spéciaux, indirects ou des suites de l'utilisation de cette brochure ou du produit qui y est décrit
respectivement. en rapport avec l'emploi de cette brochure et du produit qui y est décrit. Il leur est
également réservé le droit de procéder à des modifications de cette brochure sans avoir à en avertir
qui que ce soit. Metrologic se réserve en outre le droit de procéder à des modifications du produit
qui y est décrit.

Haftungsausschluß

Metrologic Instruments, Inc. und der/die Autor(en) übernehmen keinerlei Gewähr und haften nicht
für die Richtigkeit im Hinblick auf Inhalt oder Genauigkeit der Angaben dieser Veröffentlichung
oder des hierin beschriebenen Produkts. Sie übernehmen ebenso keinerlei Eignungsgarantie oder
Gewährleistung durchschnittlicher Qualität für einen bestimmten Zweck. Alle benannten oder
ausdrücklichen Zusicherungen schließen sämtliche Verpflichtungen oder Haftungen aus jeglichem
Schaden aus, ganz gleich ob speziell, indirekt oder als Folge der Verwendung dieser
Veröffentlichung oder des hierin beschriebenen Produkts bzw. in Zusammenhang mit der
Verwendung dieser Veröffentlichung oder des hierin beschriebenen Produkts. Darüber hinaus wird
das Recht vorbehalten, Änderungen an dieser Veröffentlichung vorzunehmen ohne die
Verpflichtung, irgend jemanden über solche Änderungen zu unterrichten. Metrologic behält sich
ferner das Recht vor, Änderungen an dem hierin beschriebenen Produkt vorzunehmen.

Esclusione della responsabilità

La Metrologic Instruments, Inc. e l’autore/gli autori non assumono nessuna garanzia e non
rispondono della correttezza per quanto riguarda il contenuto o la precisione di quanto indicato nel
presente Manuale o del prodotto in esso descritto. Neppure essi assumono una garanzia per
l’idoneità o una garanzia della qualità media per un determinato scopo. Tutte le garanzie citate o
fatte espressamente escludono qualsiasi obbligo o responsabilità derivanti da qualsiasi danno,
indipendentemente dal fatto che questo obbligo/questa responsabilità risulti in particolare, i­ndirettamente o come conseguenza dall’uso del presente Manuale o del prodotto in esso descritto
oppure se è legato/a all’uso del presente Manuale o del prodotto in esso descritto. Inoltre ci si
riserva il diritto di modificare il presente Manuale senza essere obbligati ad informare persona
alcuna circa dette modifiche. Metrologic si riserva il diritto di apportare modifiche al prodotto
descritto nel presente Manuale.

25

Appendix D

Notices

Notice

This equipment has been tested and found to comply with limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference, in which
case the user will be required to correct the interference at his own expense. Any unauthorized
changes or modifications to this equipment could void the users authority to operate this device.

Notice

This digital apparatus does not exceed the Class A limits for radio noise emissions from digital
apparatus set out in the Radio Interference Regulations of the Industry and Canada.

Caution

Use of controls or adjustments or performance of procedures other than those specified herein may
result in hazardous laser light. Under no circumstances should the customer attempt to service the
laser scanner. Never attempt to look at the laser beam, even if the scanner appears to be
nonfunctional. Never open the scanner in an attempt to look into the device. Doing so could result
in hazardous laser light exposure. The use of optical instruments with the laser equipment will
increase eye hazard.

Remarque

Après contrôle de cet appareil, on a noté qu'il répondait aux valeurs limites de la classe A, c­onformément à la partie 15 des directives de l'administration fédérale américaine pour les t­élécommunications. Ces valeurs limites ont été prévues pour garantir une protection suffisante
contre les effets nocifs dus à l'emploi de l'appareil dans un magasin. L'appareil génère et utilise une
énergie haute fréquence et peut, s'il n'est pas installé et utilisé conformément aux instructions
mentionnées dans le guide d'utilisation, entraîner des perturbations dans la radiocommunications.
L'utilisation de cet appareil dans une zone d'habitation entraînera très vraisemblablement des
perturbations. Dans ce cas, l'utilisateur est tenu de remédier à ces perturbations à ses propres frais.
Toute modification ou remplacement non autorisé sur cet appareil peut entraîner l'invalidité de
l'autorisation d'utilisation de l'appareil.

Remarque

Cet appareil numérique ne va pas contre les valeurs limites pour émissions de bruits radios des
appareils numérique de la classe A, conformément aux directives relatives aux perturbations des
radiocommunications du ministère canadien pour l'industrie.

Attention

L'emploi de commandes, réglages ou procédés autres que ceux décrits ici peut entraîner de graves
irradiations. Le client ne doit en aucun cas essayer d'entretenir lui-même le scanner ou le laser. Ne
regardez jamais directement le rayon laser, même si vous croyez que le scanner est inactif.
N'ouvrez jamais le scanner pour regarder dans l'appareil. Ce faisant, vous vous exposez à une
rayonnement laser mortel. L'emploi d'appareils optiques avec cet équipement laser augmente le
risque d'endommagement de la vision.

26

Anmerkung

Nach Überprüfung dieses Geräts wurde festgestellt, daß es den Grenzwerten für Digitalgeräte der
Klasse A gemäß Teil 15 der Richtlinien der US-amerikanischen Bundesbehörde für das
Fernmeldewesen entspricht. Diese Grenzwerte wurden festgelegt, um einen angemessenen Schutz
gegen schädliche Auswirkungen bei Einsatz des Geräts in einer Ladenumgebung zu gewähren.
Das Gerät erzeugt und verwendet Hochfrequenzenergie und kann diese ausstrahlen, und kann,
falls es nicht gemäß den im Bedienerhandbuch enthaltenen Anweisungen installiert und verwendet
wird, zu einer Störung des Funkverkehrs führen. Der Betrieb dieses Geräts in einem Wohngebiet
führt höchstwahrscheinlich zu Störungen. In diesem Fall ist der Bediener verpflichtet, die Störung
auf eigene Kosten zu beseitigen. Durch jegliche unerlaubte Auswechselung oder Änderung an
diesem Gerät könnte die Genehmigung des Bedieners zur Verwendung dieses Geräts ungültig
werden.

Anmerkung

Dieses Digitalgerät verstößt nicht gegen die Grenzwerte für Funkrauschemissionen von
Digitalgeräten der Klasse A gemäß den Richtlinien für Funkstörungen des kanadischen
Ministeriums für Industrie.

Achtung

Die Verwendung anderer als der hierin beschriebenen Steuerungen, Einstellungen oder Verfahren
kann eine lebensgefährliche Laserstrahlung hervorrufen. Der Kunde sollte unter keinen
Umständen versuchen, den Laser-Scanner selbst zu warten. Sehen Sie niemals in den Laserstrahl,
selbst wenn Sie glauben, daß der Scanner nicht aktiv ist. Öffnen Sie niemals den Scanner, um in
das Gerät hineinzusehen. Wenn Sie dies tun, können Sie sich einer lebensgefährlichen
Laserstrahlung aussetzen. Der Einsatz optischer Geräte mit dieser Laserausrüstung erhöht das
Risiko einer Sehschädigung.

N.B.

Dal controllo di questo apparecchio risulta che esso risponde ai valori limite per apparecchi
digitali della classe A conf. parte 15 delle direttive sulle telecomunicazioni dell’Autorità federale
statunitense. Questi valori limite sono stati fissati per garantire una protezione adeguata contro gli
effetti nocivi se questo apparecchio viene usato all’intero di un negozio. L’apparecchio genera,
utilizza e può emettere energia ad alta frequenza e, se non viene installato ed utilizzato
conformemente alle indicazioni fornite nel Manuale utente, può provocare disturbi al servizio
radiofonico. L’uso di questo apparecchio in zone residenziali causa molto probabilmente dei
disturbi. In questo caso l’utente è obbligato ad eliminare questi disturbi a sue spese. Qualsiasi
sostituzione o modifica non autorizzata all’apparecchio potrebbe rendere invalida l’autorizzazione
dell’utente all’uso dell’apparecchio.

N.B.

Questo apparecchio digitale non supera I valori limite per l’emissione di radiorumori da parte di
apparecchi digitali della classe A conformemente alle direttive per radiodisturbi del Ministero
canadese per l’Industria.

Attenzione

L’utilizzo di sistemi di controllo, di regolazioni o di procedimenti diversi da quelli decritti nel
presente Manuale può provocare dei raggi laser pericolosi per la vita. Il cliente non deve
assolutamente tentare di riparare egli stesso lo scanner laser. Non guardate mai nel raggio laser,
anche se credete che lo scanner non sia attivo. Non aprite mai lo scanner per guardare dentro
l’apparecchio. Se tuttavia lo fate, potete esporVi a dei raggi laser pericolosi per la vita. L’uso di
apparecchi ottici con questo equipaggiamento laser aumenta il rischio di danni alla vista.

27

Appendix E

Patents

“Patent Information

This METROLOGIC product may be covered by one or more of the following
U.S. Patents:

U.S. Patent No. 4,360,798; 4,369,361; 4,387,297; 4,460,120; 4,496,831;
4,593,186; 4,607,156; 4,673,805; 4,736,095; 4,758,717; 4,816,660;
4,845,350; 4,896,026; 4,923,281; 4,933,538; 4,992,717; 5,015,833;
5,017,765; 5,059,779; 5,117,098; 5,124,539; 5,130,520; 5,132,525;
5,140,144; 5,149,950; 5,180,904; 5,200,599; 5,229,591; 5,247,162;
5,250,790; 5,250,791; 5,250,792; 5,262,628; 5,280,162; 5,280,164;
5,304,788; 5,321,246; 5,324,924; 5,396,053; 5,396,055; 5,408,081;
5,410,139; 5,436,440; 5,449,891; 5,468,949; 5,479,000; 5,532,469;
5,545,889

No license right or sublicense is granted, either expressly or by implication,
estoppel, or otherwise, under any METROLOGIC or third party intellectual
property rights (whether or not such third party rights are licensed to
METROLOGIC), including any third party patent listed above, except for an
implied license only for the normal intended use of the specific equipment,
circuits, and devices represented by or contained in the METROLOGIC
products that are physically transferred to the user, and only to the extent of
METROLOGIC’s license rights and subject to any conditions, covenants and
restrictions therein.”

28

Index

A G

AC input/outlet 3 Germany (GmbH) ii, 24
Application 20 Good read 21
Asia ii Green LED 1, 5, 6, 10, 22
Assignments

pin 22, 23 H

Headquarters ii

B

Beep 1, 3, 6, 21 Humidity 21
Beeper operation 21

C Indicators
Cable

communication 3
head 3, 5
shield 23

CDRH Class II 14, 20
Clean 19, 21 L
Compliance 3, 4
Contrast 21
Copyright ii
Current 20, 22, 23
Customer Service ii, 24

D

Decode capability 21 Locations ii
Depth of field 17, 18
Dimensions 20 M
Disclaimer 25

E Model number 14
Electrical 20
Email ii
Environmental 21 Notices 26, 27
ESD 21
Europe ii O
External Power supply 3

F

Faulty equipment 24 Operational 21
Fax ii Output window 1, 5, 10, 14-16,
Functions 5 19, 21

Host 1, 3-5, 10, 21

I

LEDs 1, 3, 5, 6, 10, 21, 22

Visual 10-13
Internet ii
Introduction 1

Labels 14
LASERKLASSE 1 14
LEDs 1, 3, 5, 6, 10, 21, 22
Light levels 21
Light source 20
Limited warranty 24
List 2

Maintenance 19, 21
Mechanical 20

N

Operating current 20
Operating temperature 21
Operation 1, 21

29

P

Parts 5
Patents 28
Pin assignments 22, 23
Power supply 3, 4
Print contrast 21

R

Red LED 1, 3, 5, 6, 10
Repair 24
Rights

property 28

warranty 24
RMA 24
Roll, pitch, yaw 21

S

Scan field 1, 10, 16
Scan lines 21
Scan speed 21
Service 24
Shipping carton 2
South America ii
Specifications 20, 21
Storage temperature 21

T

Temperature 21
Transformer 10

U

UL/CSA/TUV 20
USA corporate headquarters
ii

V

Ventilation 21
Voltage 3, 4, 20, 22

W

Warranty 24
Watt(s) 20
Weight 20
Window 1, 5, 10, 14-16,

19, 21

30