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Summary of Contents for Digi-Sense 20250-26
- Page 1 User Manual Digital Contact/Photo Tachometer with NIST-Traceable Calibration Model 20250-26 THE STANDARD IN PRECISION MEASUREMENT...
- Page 3 Introduction The Digi-Sense Digital Contact/Photo Tachometer (Model 20250-26) is designed for quick and accurate rpm and sur- face speed measurements. This digital tachometer is an essential instrument in preventive maintenance programs for ensuring the optimal performance of your equipment and will reduce costly downtime and repairs by catching potential equipment problems early.
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Page 4: Meter Description
Meter Description 1. Surface speed wheel 2. rpm contact adapter 3. Contact converter 4. Measure button 5. Mode/Function switch (m/min contact, rpm contact, rpm photo) 6. MEM button (memory/recall) 7. Backlit LCD 8. Battery cover... -
Page 5: Display Descriptions
Display Descriptions General display function descriptions: • “m/min” icon indicates meters per minute • “rpm” icon indicates revolutions per minute • “ ” icon indicates low-battery status When holding and selecting the MEM button: • “UP” icon indicates the maximum measurement value •... -
Page 6: Setup And Operation
Setup and Operation Procedure for Contact Measurements Rotational rpm speed measurement 1. Select the “rpm contact” option on the Mode/Func- tion switch located on the front of the tachometer. 2. Install the contact converter to the top of the tachometer. 3. - Page 7 Procedure for Noncontact (Photo) Measurements 1. Apply a piece of reflective tape on the object being measured. a. Note: Cut and peel reflective tape into approxi- mately 0.5" (12 mm) squares and apply one square to each rotational shaft. The nonreflective area must always be greater than the reflective area.
- Page 8 Displaying Maximum Measurement Value After taking measurements, press and hold the MEM button once. The “UP” icon will appear on the left side of display and the maximum measurement value will be shown on the right side of display. Displaying Minimum Measurement Value After taking measurements, press the MEM button two times and hold on the second press.
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Page 9: Specifications
Specifications Mode/ Contact Photo Function Range 0.5 to 19,999 rpm 2.5 to 99,999 rpm 0.1 rpm from 0.5 to 999.9 rpm; 0.1 rpm from 2.5 to 999.9 rpm; Resolution 1 rpm over 1000 rpm 1 rpm over 1000 rpm Accuracy ±(0.05% + 1 digit) Surface speed 0.2 to 6561 ft/min;... - Page 10 “+” and “-“ symbols located on the battery floor compartment. Installing the batteries incorrectly may cause permanent circuit damage to the tachometer. It is recommended that Digi-Sense products are calibrated annually to ensure proper function and accurate measure- ments; however, your quality system or regulatory body may require more frequent calibrations.
- Page 12 For Product and Ordering Information, Contact: sales@novatech-usa.com www.novatech-usa.com Tel: (866) 433-6682 Fax: (866) 433-6684 Tel: (281) 359-8538 Fax: (281) 359-0084 Manual Part No. 00100-48 1065DGMAN_20250-26 Rev.1...
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