Extech Instruments 461893 User manual

User's Manual
Digital Photo Tachometer
Model 461893
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Introduction
Congratulations on your purchase of the Extech 461893 Photo Tachometer. This device provides
non-contact measurements over a wide range (5 to 100,000 RPM). A reflective mark on the object
to be measured is used as a target for the meter's integral light beam. Careful use of this meter will
provide years of reliable service.
Specifications
General Specifications
Meter circuitry Custom one-chip LSI microprocessor
Time base Quartz crystal
Display 5-digit (99999 count) 0.4" (10mm) multi-function LCD
Measurement 5 to 99,999 RPM in 2 ranges
Range select Automatic
Data Recording LAST / MIN / MAX readings stored for later recall
Sampling time 1 second (over 60 rpm)
Target distance 2 to 6" (50 to 150mm) depending on ambient light
Operating Temperature 32°F to 122°F (0°C to 50°C)
Power Supply 4 x 1.5V 'AA' batteries
Power Consumption Approximately 150 mA
Weight 8.8 oz. (250 g) including battery
Size 6.7 x 2.8 x1.5" (170 x 72 x 37mm)
Accessories Reflective tape (23") and carrying case
Range Specifications
Measurement Range Resolution Accuracy
RPM 5 to 999.9 RPM
1,000 to 99,999 RPM
0.1 RPM
1 RPM
+(0.05% + 1 digit)
+(0.05% + 1 digit)
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Meter Description
1. Photo source
2. LCD Display
3. Memory record button
4. Battery compartment on rear
5. Measure button
Meter Operation
RPM Measurements
1. Apply a small piece of reflective tape to the object under test as shown below.
2. Point the meter's photo source at the tape on the object and press the Measure button. Hold the
meter from 2 to 6" (50 to 150mm) from the reflective tape depending on ambient light.
3. Check that the Monitor icon flashes on the LCD indicating that the meter is sensing a reflection
from the tape. If the monitor does not appear check that the light source is hitting the reflective
tape at a 90o angle.
4. Release the Measure button when the display stabilizes (2 seconds approx.). Note the LCD
RPM reading.
5. If the RPM value is < 50, apply additional pieces of reflective tape (four pieces are shown
below). Divide the LCD reading by the number of reflective tapes to compute the actual RPM
(Actual RPM = Reading / 4).
Photo Tachometer
Rotating object
Reflective tape
Light source
and reflection
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Memory Record and Recall
The meter automatically records the Minimum and Maximum readings. These represent the lowest
and highest readings measured from the moment the Measure button is pressed to the moment it is
released. The Last reading is also recorded; this is the last measurement taken before the Measure
button is released. These stored readings can be displayed on the LCD using the Memory button as
described below:
1. Press once and hold: The Last reading is displayed followed by "LA"
2. Press again and hold: The Maximum value is displayed followed by the word "UP"
3. Press again and hold: The Minimum value is displayed followed by "dn"
Special Measurement Considerations
1. The non-reflective area of the object under test must always be greater than the reflective tape
area.
2. If the shaft of the object under test is reflective, it should be covered with black tape or paint
before attaching reflective tape.
Battery Replacement
The low battery indication appears as "LO" on the display. To replace the batteries:
1. Slide the rear cover off the battery compartment in the direction indicated by the arrow.
2. Replace the four 1.5V 'AA' batteries and the battery compartment cover.
3. Remove the batteries if the instrument will be stored for long periods of time.
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Warranty
FLIR Systems, Inc. warrants this Extech Instruments brand device to be free of defects in parts and workmanship for one year
from date of shipment (a six month limited warranty applies to sensors and cables). If it should become necessary to return the
instrument for service during or beyond the warranty period, contact the Customer Service Department for authorization. Visit
the website for contact information. A Return Authorization (RA) number must be issued before any product is
returned. The sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in transit.
This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, operation outside of
specification, improper maintenance or repair, or unauthorized modification. FLIR Systems, Inc. specifically disclaims any implied
warranties or merchantability or fitness for a specific purpose and will not be liable for any direct, indirect, incidental or
consequential damages.  FLIR s total liability is limited to repair or replacement of the product. The warranty set forth above is
inclusive and no other warranty, whether written or oral, is expressed or implied.
Calibration, Repair, and Customer Care Services
FLIR Systems, Inc. offers repair and calibration services for the Extech Instruments products we
sell. NIST certification for most products is also provided. Call the Customer Service Department for
information on calibration services available for this product. Annual calibrations should be
performed to verify meter performance and accuracy. Technical support and general customer
service is also provided, refer to the contact information provided below.
Copyright ©2013 FLIR Systems, Inc.
All rights reserved including the right of reproduction in whole or in part in any form
Support Lines: U.S.
Technical Support: Option 3; E mail:
Repair & Returns: Option 4; E mail:
Product specifications are subject to change without notice
Please visit our website for the most up to date information
FLIR Commercial Systems, Inc.
ISO 9001 Certified
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Garantie
FLIR Systems, Inc. garantit que cet appareil Extech Instruments est exempt de défauts matériaux et de fabrication pendant un
an à partir de la date  d envoi (une garantie limitée de six mois  s applique aux capteurs et aux câbles). Si le renvoi de  l appareil
pour réparation devient nécessaire durant ou après la période de garantie, contactez le service client pour autorisation. Pour
obtenir les coordonnées, visitez le site Web suivant : . Un numéro  d autorisation de retour (AR) doit être délivré
avant tout retour de produit.  L expéditeur prend à sa charge les frais  d expédition, le fret,  l assurance et  l emballage correct de

l appareil afin de prévenir toute détérioration durant le transport. Cette garantie ne  s applique pas aux dommages imputables à

l utilisateur, tels que  l usage impropre ou abusif, un mauvais câblage, une utilisation non conforme aux spécifications, un
entretien ou une réparation incorrecte, ou toute modification non autorisée. FLIR Systems, Inc. déclinera spécifiquement toute
garantie ou qualité marchande ou aptitude à  l emploi prévu, et ne sera en aucun cas tenu responsable pour tout dommage
conséquent, direct, indirect ou accidentel. La responsabilité totale de FLIR est limitée à la réparation ou au remplacement du
produit. La garantie définie ci dessus est inclusive et aucune autre garantie, écrite ou orale,  n est exprimée ou implicite.
Calibrage, réparation et services après vente
FLIR Systems, Inc. offre des services de calibrage et de réparation pour les produits Extech
Instruments que nous commercialisons. Nous fournissons également une certification NIST pour la
plupart des produits. Contactez notre service client pour toute information sur les services de
calibrage disponibles pour ce produit. Un calibrage doit être effectué chaque année pour vérifier
les performances et la précision du mètre. Nous offrons également une assistance technique et un
service à la clientèle. Veuillez vous reporter aux coordonnées fournies ci dessous.
Copyright ©2013 FLIR Systems, Inc.
Tous droits réservés, y compris la reproduction partielle ou totale sous quelque forme que ce soit.
Lignes  d assistance: États Unis
Service  d assistance technique : Option 3 ; E mail :
Réparations et retours : Option 4 ; E mail :
Les spécifications produit sont sujettes à modifications sans préavis.
Pour les toutes dernières informations, veuillez visiter notre site Web.
FLIR Commercial Systems, Inc.
Certifié ISO 9001
www. .com [e-mail]1.800.561.8187

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Garantía
FLIR Systems, Inc., garantiza este dispositivo marca Extech Instruments para estar libre de defectos en partes o mano de obra
durante un año a partir de la fecha de embarque (se aplica una garantía limitada de seis meses para cables y sensores). Si fuera
necesario regresar el instrumento para servicio durante o después del periodo de garantía, llame al Departamento de Servicio a
Clientes para obtener autorización. Visite para Información de contacto. Se debe expedir un número de
Autorización de Devolución (AD) antes de regresar cualquier producto. El remitente es responsable de los gastos de embarque,
flete, seguro y empaque apropiado para prevenir daños en tránsito. Esta garantía no se aplica a defectos resultantes de las
acciones del usuario como el mal uso, alambrado equivocado, operación fuera de las especificaciones, mantenimiento o
reparación inadecuada o modificación no autorizada. FLIR Systems, Inc., rechaza específicamente cualesquier garantías
implícitas o factibilidad de comercialización o idoneidad para cualquier propósito determinado y no será responsable por
cualesquier daños directos, indirectos, incidentales o consecuentes. La responsabilidad total de FLIR está limitada a la
reparación o reemplazo del producto. La garantía precedente es inclusiva y no hay otra garantía ya sea escrita u oral, expresa o
implícita.
Servicios de calibración, reparación y atención a clientes
FLIR Systems, Inc., ofrece servicios de reparación y calibración para los productos que vendemos
de Extech Instruments. Además ofrecemos certificación NIST para la mayoría de los productos.
Llame al Departamento de Servicio al Cliente para solicitar información de calibración para este
producto. Para verificar el funcionamiento y precisión se debe realizar la calibración anual. Además
se provee Soporte Técnico y servicios generales al cliente, consulte la información de contacto en
seguida.
Copyright ©2013 FLIR Systems, Inc.
Reservados todos los derechos, incluyendo el derecho de reproducción total o parcial en cualquier medio
Líneas de soporte: EE.UU.
Soporte Técnico Opción 3; correo electrónico:
Reparación / Devoluciones: Opción 4; correo electrónico:
Las especificaciones del producto están sujetas a cambios sin aviso
Por favor visite nuestra página en Internet para la información más actualizada
FLIR Commercial Systems, Inc.,
Certificado ISO 9001
www. .com [e-mail]1.800.561.8187