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Dell MH941 - page 1
METROLOGIC INSTRUMENTS, INC. MH941 Hand-Held Laser Scanner Installation and User’s Guide MLPN 2183 Printed in USA October 1998 ...
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Dell MH941 - page 2
ii 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 info@metrologic.com metrologic@europe.metrologic.c ...
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Dell MH941 - page 3
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/Contro ...
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Dell MH941 - page 4
1 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 ava ilable, refer to your decoder’s documentation concerning scanne r requirements and operation. When usin g a Metrologic hand-held scanner with one of Metr ...
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Dell MH941 - page 5
2 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. ...
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Dell MH941 - page 6
3 Connecting the MH941 Hand-Held Scann er to the Fixed Scanner and Host Device In order for the MH941 scanner to maintain compliance with applicabl e standards, all circuits connected to the scanner (Example: power supply, hos t system , etc.) must meet the requirements for SELV ( S afety E xtra L ow V oltage) according to EN60950. 1. Make sure the ...
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Dell MH941 - page 7
4 Figure 1 Co nnecting the MH941 Hand-Held Scanner to th e Decoder/Controller In order for the MH941 scanner to maintain compliance with applicabl e standards, all circuits connected to the scanner (Example: power supply, hos t system , etc.) must meet the requirements for SELV ( S afety E xtra L ow V oltage) according to EN60950. Sinc e there are ...
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Dell MH941 - page 8
5 Figure 2 Parts of the MH941 Scanner Becoming familiar with the features of the MH941 scanner will help whe n operating the scanner. The following illustration and list explain the pertinen t parts. Laser Output Window Th e laser beam emits from this aperture . Head Cable Ths cable is terminated with a 9-pin squeez e connector. The following funct ...
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Dell MH941 - page 9
6 Audible Indicators There are audible indications that signal the status of your scanner. Thes e indicatio ns are dependent upon the decoder being used. The function of thes e 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 audibl e indic ...
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Dell MH941 - page 10
7 Signaux acoustiques Il existe d es signaux acoustiques qui vous informent sur l'état du scanner. Ce s signaux dépendent du décodeur que vous u tilisez. Il peut arriver que les fonctions de ce s signaux ne correspondent pas à celles qui suivent si vous utilisez u n décodeur qui n'a pas été construit par Metrologic. Quand le scanne ...
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Dell MH941 - page 11
8 Akustische Anzeigen Es sind akustische Anzeigen vorhanden, die Ihnen Aufschluß über de n Scann erstatus geben. Diese Anzeigen sind abhängig von dem von Ihne n verwendeten Dekodierer. Es kann sein, d aß die Funktionen dieser Anzeigen nicht den n achfolgend angegebenen entsprechen, falls Sie einen Dekodiere r verwenden, der nicht von Metrologic ...
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Dell MH941 - page 12
9 Segnali acustici Sono previ sti dei segnali acustici che Vi informano sullo stato dello scanner . Questi segnali dipendono dal decodificatore da Voi utilizzato. Se utilizzate u n de codificatore che non è stato fabbricato dalla Metrologic è possibile che l e funzioni di questi segnali non corrispondano a quelle qui di seguito indicate. Se lo sc ...
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Dell MH941 - page 13
10 Visual Indicators There are visual indications that signal the status of your scanner. Thes e indicatio ns are dependent upon the decoder being used. The function of thes e 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 flas ...
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Dell MH941 - page 14
11 Signaux optiques Il existe des signaux optiques qui vous informent sur l'état du scanner. Ce s signaux dépendent du décodeur que vous u tilisez. Il peut arriver que les fonctions de ce s signaux ne correspondent pas à celles qui suivent si vous utilisez u n décodeur qui n'a pas été construit par Metrologic. Sur la partie supéri ...
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Dell MH941 - page 15
12 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 hergeste ...
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Dell MH941 - page 16
13 Segnali ottici So no 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 fabb ricato dalla Metrologic è possibile che le funzioni di questi segnali no n corrispondano a quelle qui di seguito indicate. Sulla parte s ...
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Dell MH941 - page 17
14 Labels The MH941 is a CDRH Class II laser system and an IEC Class I Laser System. Your unit w ill have a CDRH Class II caution label and an LASERKLASSE 1 l a bel affixed below the model number. The model number label is found on the bottom of the scanner’s head. Found directly bel ow the output window at the front of your unit is a red avoid e ...
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Dell MH941 - page 18
15 Figure 3 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 appli ...
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Dell MH941 - page 19
16 Figure 4 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. ...
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Dell MH941 - page 20
17 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" - ...
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Dell MH941 - page 21
18 Figure 5 ...
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Dell MH941 - page 22
19 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. ...
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Dell MH941 - page 23
20 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 w ...
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Dell MH941 - page 24
21 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: 42 E , 68 E , 52 E The following operations are decoder/controller dependent. Beeper ...
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Dell MH941 - page 25
22 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 ...
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Dell MH941 - page 26
23 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 approx- imately 30 milliseco ...
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Dell MH941 - page 27
24 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 ...
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Dell MH941 - page 28
25 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 f ...
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Dell MH941 - page 29
26 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 rad ...
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Dell MH941 - page 30
27 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 i ...
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Dell MH941 - page 31
28 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; 5,059,7 ...
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Dell MH941 - page 32
29 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 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 ...
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Dell MH941 - page 33
30 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 ...
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