Extech 461893 Bedienungsanleitung
Extech
Drehzahlmesser
461893
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User's Manual
Digital Photo Tachometer
Model 461893
Model 461893 Ver. 1.3 Oct. 2002
2
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 warrant Service Department at (781) y period, contact the Customer
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
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 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)
Model 461893 Ver. 1.3 Oct. 2002
3
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 90
o 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
Produktspezifikationen
| Marke: | Extech |
| Kategorie: | Drehzahlmesser |
| Modell: | 461893 |
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