User Manual Digital Contact/Photo Tachometer - Cole
Contents
1. O oO BW N Four set screws Meter Descrinti ao A UU N 7 Backlit LCD 8 Battery cover Contact converter Measure button Mode Function switch MEM button Surface speed wheel rpm contact adapter SURFACE CONTACT TACH SPEEDRING TEST DEVICE m min contact rom contact rom photo memory recall DIGITAL TACHOMETER Display Describti General display function descriptions e m min icon indicates meters per minute e rpm icon indicates revolutions per minute e dE 3 icon indicates low battery status When holding and selecting the MEM button UP icon indicates the maximum measurement value dn icon indicates the minimum measurement value LA icon indicates the last measurement value An icon indicates memory recall of up to the last twenty average measurement values taken Key Features e Microprocessor CPU design combines contact tachome ter and photo tachometer capabilities in one instrument e Precision accuracy of 0 05 1 digit e User configurable contact or photo capability e Max Min last value and recall of last twenty average measurements e Photo tachometer measures from a distance up to 1916 50 cm away from target Comfortable ergonomic design e Durable lightweight ABS plastic housing e Large easy to read backlit display e Low battery indicator Setup and Operation Procedure for Contact Measur2. User Manual D DIGI SENSE Digital Contact Photo Tachometer with NIST Traceable Calibration Model 20250 26 CE THE STANDARD IN PRECISION MEASUREMENT 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 Easily configure the unit for contact or noncontact measurements depending on your application requirements Tachometer features auto ranging with 0 05 accuracy Max Min and last values built in memory recall of last twenty average measure ments and a rugged design that is ideal for industrial environments The instrument is fully tested and calibrated to NIST traceable standards Careful use of this meter will provide years of reliable service Unpacking Check individual parts against the list of items below If anything is missing or damaged please contact your instrument supplier immediately Tachometer 9 Carrying case Surface speed wheel 10 Four AA batteries Large male rpm rubber cone 11 User manual Small male rpm rubber cone 12 NIST traceable calibration report Female rpm rubber cone with data rpm contact adapter Reflective tape 23 60 cm 0 N
3. e solvents or abrasives Store the meter in an area with moderate temperature and humidity Battery Replacement When the battery power falls low the low battery icon will appear on the screen Replace the four AA batteries in the rear battery compartment by removing the battery door Ensure that the cover is securely refastened when finished Remove batteries if unit is not being used for extended time periods Note Install batteries aligning the positive and negative ends with the 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 To schedule your recalibra tion please contact InnoCal an ISO 17025 calibration laboratory accredited by A2LA INNOCAL INNOVATIVE CALIBRATION SOLUTIONS Phone 1 866 INNOCAL 1 866 466 6225 Fax 1 847 327 2993 E mail sales innocalsolutions com Web InnoCalSolutions com 10 For Product and Ordering Information Contact Cole Parmer Del gt elivering solutions ou rus Proven Precise Personal Toll Free 1 800 323 4340 Toll Free 1 800 358 5525 Phone 1 847 549 7600 Phone 1 847 327 2000 Fax 1 847 247 2929 Fax 1 847 327 2700 ColeParmer com Digi Sense Dav
4. ements Rotational rpm speed measurement 1 Select the rpm contact option on the Mode Func tion switch located on the front of the tachometer Install the contact converter to the top of the tachometer 3 Install the rpm contact adapter on the shaft 4 Place desired male or female rpm rubber cone on the rpm contact adapter Press the Measure button and lightly place the rpm contact adapter against the center hole of the rotating shaft Be certain to keep alignment straight Release the Measure button when the display reading stabilizes Surface speed measurement i Slide the Mode Function switch to m min contact option Install the surface speed wheel to the shaft on the contact converter Press the Measure button and place the surface speed wheel on the desired surface Release the Measure button when the display reading stabilizes 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 If the shaft is normally reflective it must be covered with black tape or black paint before attaching reflective tape Also make sure the shaft surface is clean and smooth before applying reflective tape b For very low rpm measuremen
5. is com Digi Sense 1065DGMAN_20250 26 Rev 1 Manual Part No 00100 48
6. rth press The An icon will appear on the left side of display and the number of aver age stored measurements will be shown on the right side of display Every sequential press of the MEM button will then display the individual stored number along with the associated average value Note After approximately 5 minutes of nonuse all mea surement values stored in memory maximum minimum last and stored are erased from the tachometer ied on Contact Photo Range 0 5 to 19 999 rpm 2 5 to 99 999 rpm Resolution Tom over 1000 pm A rpm over 1000 rpm Accuracy 0 05 1 digit Surface speed 0 2 to 6561 ft min 0 05 to 1999 9 m min Sampling time 0 8 second over 60 rpm Range select Auto range Time base Quartz crystal ar mm Display Backlit 5 digit LCD Weight 8 6 oz 244 g Dimensions 814 x 2 8 x 11 21 x 7 4 x 3 7 cm Power Four AA batteries Safety Use extreme caution when laser beam is turned on Do not let the laser beam enter your eye another person s eye or the eye of an animal e Be careful not to let the laser beam on a reflective surface strike your eye LASER RADIATION e Do not allow the laser light DO NOT STARE INTO BEAM beam to impinge on any gas ei cl tom which can explode CLASS I LASER PRODUCT Mai Recalibrati Repai Cleaning and Storage Meter should be cleaned with a damp cloth and mild detergent when necessary Do not us
7. ts increase the use of reflective tape marks and space them at equal distances apart Then divide the reading shown by the number of reflective tape marks to get the actual rpm measurement 2 Select the rpm photo option on the Mode Function switch located on the front of the tachometer 3 Press the side Measure button and align the visible light beam with the applied reflective tape target Verify that the display indication symbol lights up when the reflective tape target aligns with the beam 4 Begin taking measurements 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 The dn icon will appear on the left side of display and the minimum mea surement value will be shown on the right side of display Displaying Last Measurement Value After taking measurements press the MEM button three times and hold on the third press The LA icon will appear on the left side of display and the last measurement value will be shown on the right side of display Recalling the Stored Average Measurement Values up to the last 20 readings After taking measurements press the MEM button four times and hold on the fou
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