User`s Manual Digital Photo Tachometer Model 461893
Contents
1. or consequential damages Extech 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 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 Time base Display Measurement Range select Data Recording Sampling time Target distance Operating Temperature Power Supply Power Consumption Weight Size Accessories Range Specifications 5 digit 99999 count 0 4 10mm multi function LCD 1 second over 60 rpm 2 to 6 50 to 150mm depending on ambient light 32 F to 122 F 0 C to 50 C Measurement Range Resolution Accuracy RPM 5 to 999 9 RPM 0 1 RPM 0 05 1 digit 1 000 to 99 999 RPM 1 RPM 0 05 1 digit Meter Description 1 Photo source LCD Display A Memory record button um EXTECH 461893 Battery compartment on rear 2 SH es uper gp Measure button PHOTO TYPE 0 1rpm 9 nu 1rpm 5 999 9rpm irpm 1 00 g 1 1 000 99 999rpm DIGITAL TACHOMETER z K fi Meter Operation RPM Measurements 12. 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 90 angle 4 Release the Measure button when the display stabilizes 2 seconds approx Note the LCD RPM reading 5 If the RPM value is lt 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 Light source and reflection Photo Tachometer Reflective tape Rotating object 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 th
3. Test Equipment User s Manual EAA Depot EXTECH INSTRUMENTS 1 800 517 8431 Digital Photo Tachometer Model 461893 461893 PHOTO TYPE Irpm 5 859 rpm rpm 1 000 94 3309rpm i L i MEMO S DIGITAL TACHOMETER Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com WARRANTY EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment a six month limited warranty applies on 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 at 781 890 7440 ext 210 for authorization or visit our website at www extech com click on Contact Extech and go to Service Department to request an RA number A Return Authorization RA number must be issued before any product is returned to Extech 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 Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct indirect incidental
4. e 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 Ifthe 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 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com
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