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Digital Photo/Touch Tachometer AX-2901 INSTRUCTION MANUAL...
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INTRODUCTION This instrument can be used to measure rotation speed (RPM) and surface speed accurately. To perform rotation speed measurement, you can use Photo or Contact mode. The instrument features wide measurement range, high resolution, and quick measurement. In addition, the memory of the maximum, minimum and last readings is provided. It can be used widely and is a very useful measurement tool.
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Power Supply: a. Battery: 1.5V AA or equivalent, 4 pieces b. Using AC Adapter: output voltage of DC6V ( Note: You can select “a” or “b” for power supply) Operating Environment: 0~40°C. < 85%RH Storage Environment: -10~50°C, <85%RH Size: 217 x 84 x 43 mm (main body only) Weight: about 265 (including batteries) Instruction...
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3. TEST Button Press and keep pressing this button to perform measurement. 4. MEMORY Button It can be used to recall the last reading, the minimum reading, and the maximum reading of the last measurement. 5. Function Switch It can be used to select desired measurement: FT/MIN -------- linear speed measurement, reading unit “ft/min”...
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Display Explanation Figure 3 Symbol meanings Batteries are low and should be replaced Maximum Reading is being displayed Minimum Reading is being displayed Rotation speed unit (revolutions per minute) ft/min Speed unit, feet/minute m/min Speed unit, meter/minute CONTACT Contact mode symbol PHOTO Photo mode symbol Operation Instruction...
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1. Cut and peel adhesive reflective tape of about 2 cm length, attach it onto the object whose rotation speed you want to measure. Tip: The longer the cut reflective tape, the easier the measurement. 2. Set the function switch to PHOTO range. 3.
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2. Using Contact Mode to Measure RPM a. Select a suitable rotating touch part, and install it to the rotation axis properly, make sure the rotating touch part will not slide out during measurement. b. Set the function switch to CONTACT range. c.
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c. To avoid injury, don’t touch any turning object with hand (or part of body), or clothing. Wear an eye protector while using this instrument. 3. Performing Linear Speed Measurement. a. Install the surface speed test wheel to the rotation axis properly, make sure the surface speed test wheel will not slide out during measurement.
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Battery Replacement When the low battery indicator “ ” appears, it is necessary to replace the batteries immediately. To replace the batteries, remove the screw on the battery cover, carefully and gently remove the battery cover, replace exhausted batteries with four new batteries of the same type (1.5V AA or equivalent).
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