USER GUIDE Laser Photo / Contact Tachometer
Contents
1. button Press and hold to take readings The Laser pointer will switch on for Photo tachometer measurements when pressed e MODE button Press momentarily to switch measurement units Press and hold for 2 seconds to switch between Surface Speed and Length measurement modes 3 RPM33 en EU_V1 3 4 13 Safety WARNING Do not directly view or direct the laser pointer toward an eye Low power visible lasers do not normally present a hazard but present potential for hazard if viewed directly for extended periods of time The Laser in this unit complies with FDA 21 CFR 1040 10 and 1040 11 IEC 60825 1 2001 2008 Edition 1 2 EN 60825 1 1994 A11 1996 A2 2001 A1 2002 CAUTION Rotating and linear moving objects can be dangerous Use extreme care 4 RPM33 en EU_V1 3 4 13 Preparing for Measurements Non Contact Photo Tachometer Preparation 1 Apply a square piece of reflective tape to the surface of the object under test nominal tape size 0 5 12mm Be sure to affix the tape as close to the outer edge of the object under test as possible See diagram below If not already done unscrew and remove the meter collar item number 3 in the Description section diagram Proceed to the Taking Measurements section below Contact Tachometer Preparation 1 If not already done attach the collar item number 3 in the Description section diagram to the meter Slide the contact adaptor onto the tachometer s shaft2. Be sure to align the adaptor with the alignment pin on the shaft of the contact adaptor Attach a contact measurement accessory cone wheel or concave accessory onto the contact adaptor For Contact operation the meter can measure Surface Speed or Length Read the section titled Surface Speed and Length Measurement Modes later in this guide for details Follow the steps in the Taking Measurements section below 5 RPM33 en EU_V1 3 4 13 Taking Measurements Non Contact Photo Tachometer Measurements 1 Prepare for the Non Contact measurement as described in the Measurement Preparation section above Use the MODE button momentarily presses to select RPM rotations per minute or Hz Hertz rotations per second as the unit of measure Press and hold the MEASURE button to begin a measurement session Hold the MEASURE button down for the duration of the test and release it to end the session Point the meter toward the device under test at a distance of 2 to 20 50 to 500mm Be sure to align the laser light beam with the reflective tape see diagram above in previous section Verify that the monitor indicator appears on the LCD when the reflective tape passes through the light beam Read the measurement result from the LCD display When the MEASURE button is released the last reading will remain on the display for 5 to 10 seconds before the Auto Power OFF feature switches the meter OFF The HOLD displa
3. EXTECH USER GUIDE INSTRUMENTS Model RPM33 Laser Photo Contact Tachometer Laser Photo Contact Tachometer RPM33 Introduction Congratulations on your purchase of the Extech Laser Photo Contact Tachometer Model RPM33 The RPM33 digital tachometer offers fast and accurate measurements of the following e Rotational speed RPM e Total Revolutions REV e Frequency Hz Surface Speed meters per minute inchers per minute feet per minute yards per minute e Length meters inches feet and yards Features include wide measurement range high resolution easy to read backlit LCD MAX MIN AVG memory Record Recall readings and Laser sighting This device is shipped fully tested and calibrated and with proper use will provide years of reliable service Please visit our website www extech com to check for the latest version of this User Guide 2 RPM33 en EU_V1 3 4 13 Description Meter Description 1 1 Surface circumference wheel accessory is shown connected to shaft rubber cone and concave accessories are also supplied 2 Adaptor shaft 3 Removable collar Photo sensor and laser source are located at the top of the meter under this collar mares 4 MEM Memory button 5 Battery compartment rear 6 MEASURE button 7 MODE button 8 LCD Display Laser Photo Contact Tachometer RPM33 Push button Description e MEM Memory button Used to Record Recall readings e MEASURE
4. SURE button is released measurement session and logging ends Battery Replacement The low battery indication appears as BAT on the display To replace the battery loosen the Philips head screw securing the rear battery cover and lift the cover off Replace the 9V battery and replace cover Never dispose of used batteries or rechargeable batteries in household waste As consumers users are legally required to take used batteries to appropriate collection sites the retail store where the batteries were purchased or wherever batteries are sold Disposal Do not dispose of this instrument in household waste The user is obligated to take end of life devices to a designated collection point for the disposal of electrical and electronic equipment Other Battery Safety Reminders o Never dispose of batteries in a fire Batteries may explode or leak 9 RPM33 en EU_V1 3 4 13 Specifications General Specifications Time base Display Laser light source Detecting Distance Sampling Time Tachometer accuracy Memory Operating Conditions Power Supply Power Consumption Weight Size Quartz crystal 5 digit LCD Display Class 2 laser lt 1mW power Wavelength is 630 to 670nm 50 to 500mm 2 to 20 0 5 seconds over 120 rpm 0 05 reading 1digit Measurement data are stored in reading sets A reading set consists of one 1 instantaneous measurement plus MIN MAX AVG readings Ten 10 reading sets are a
5. ession starts when the MEASURE button is pressed and ends when it is released Logging starts when the user presses the MEM button momentarily and ends when the MEAUSURE button is released The number shown on the LCD in the lower right hand corner data 0 9 indicates the current memory location See example time line diagram below MEAS 01 MEAS 02 A B MEM MEAS 01 MEASURE button is pressed measurement session begins A No logging during this period MEM MEM button is pressed momentarily initial reading is logged and MIN MAX AVG logging begins B MAX MIN AVG readings are tracked and recorded during this period MEAS 02 MEASURE button is released measurement session and logging ends Press and hold the MEASURE button to begin a measurement session as described earlier While holding down the MEASURE button press the MEM button momentarily The reading on the display at the time of the MEM button press initial reading will be stored in the current reading set and the MIN MAX AVG tracking will begin Note the reading set memory location on the lower right hand corner of the LCD The MIN MAX AVG readings are calculated over the course of the measurement session starting from when the MEM button is pressed and ending when the MEASURE button is released MIN MAX AVG readings are stored in the same reading set as the initial reading Release the MEASURE button to end the measurement session Now momentary presses of the MEM but
6. n will step through the available units Refer to the Specifications section and to the section below entitled Surface Speed and Length Measurement Modes for units of measure details Surface Speed Length and Revolutions Measurement Modes 1 To switch between the Surface Speed and the Length measurement modes press and hold the MODE button for two seconds The units of measure available in the Surface Speed mode are meters per minute M M inches per minute I M feet per minute F M and yards per minute Y M Step through the units selections with momentary presses of the MODE button The units of measure available in the Length measurement mode are meters M inches I feet F yards Y and revolutions REV The Revolutions REV mode is handy as a counter for use with custom sized wheel attachments to count tally wheel rotations Step through the units selections with momentary presses of the MODE button 7 RPM33 en EU_V1 3 4 13 Datalog Readings The RPM33 can log up to ten 10 reading sets for each measurement session for each unit of measure display A reading set consists of four 4 values Initial reading reading recorded when MEM button is pressed Maximum reading MAX icon shown Minimum reading MIN icon shown Average reading AVG icon shown This totals 400 stored readings 4 values per reading set 10 reading sets per measurement session 10 units of measure displays A measurement s
7. ton step through the initial reading MAX MIN and AVG readings stored in the current memory location Note that subsequent presses of the MEM button step through the remaining nine memory locations be sure to note the memory location number when reviewing data to avoid confusion When recalling data press and hold the MEM button to quickly jump from one reading set to another The reading set number on the lower right scrolls while the MEM button is held 8 RPM33 en EU_V1 3 4 13 Datalogging more than one Reading Set per Measurement Session If the MEM button is pressed more than once during a measurement session more than one reading set will be created for that measurement session one reading set for each MEM press This is useful if more than one initial reading is desired for a given measurement session The MIN MAX AVG values logged in each reading set represent the MIN MAX AVG values recorded between the MEM presses See the time line example below MEAS 01 MEAS 02 A B C MEMO1 MEMO2 MEAS 01 MEASURE button is pressed measurement session begins A No logging during this period MEMO1 MEM button is pressed momentarily logging begins into location Data 0 B Reading set Data 0 logs initial reading and MAX MIN AVG readings MEMO02 MEM pressed again previous log data 0 ends and new log data 1 begins C Reading set Data 1 logs initial reading and MAX MIN AVG readings for this time period MEAS 02 MEA
8. vailable per measurement session 0 C to 50 C 32 F to 122 F RH 80 Max 9V battery 45mA DC approximately 151g 5 30z 160 x 60 x 42 mm 6 2 x 2 3 x 1 6 10 RPM33 en EU_V1 3 4 13 Measurement Range Specifications Range Resolution Accuracy Photo Tachometer 0 1 rpm 2 0 to 9999 9 2 to 99 999 RPM RPM 1rpm gt 9999 9 05 of reading 1 rPm digit Contact Tachometer Revolutions per minute 0 1 rpm 2 0 to 9999 9 2 to 19 999 rom RPM 1 rpm gt 9999 rPm minute 0 to 78 720 inches per 5 Surface Speed minute 1 in min Revolutions per minute 0 to 6560 feet per minute O to 2186 yards per minute 1 yd min 0 05 of reading 1 0 1 inch up to 9999 9 using circumference 1 inch gt 9999 0 1 to 1093 yards 0 1 yard Revolutions counter for custom sized 0 to 99 9999 Revolutions 1 revolution REV wheels Note that when RPM is mixed case rPm it represents readings gt 9999 with a resolution of 1 and when it is upper case RPM if represents the range 0 2 to 9999 9 with 0 1 resolution Length 3 9 to 39 370 inches Copyright 2013 FLIR Systems Inc All rights reserved including the right of reproduction in whole or in part in any form www extech com 11 RPM33 en EU_V1 3 4 13
9. y icon will switch ON Non Contact Photo tachometer Measurement Considerations e Bright ambient light may interfere with the reflected light beam Shading the target area may be necessary in some cases e The non reflective area must always be larger than the reflective area e If the shaft or rotating object is normally reflective it must be covered with black tape or paint before the reflective tape is applied e To improve repeatability of low RPM measurements apply additional squares of reflective tape Divide the reading shown on the display by the number of pieces of reflective tape squares to calculate the actual RPM 6 RPM33 en EU_V1 3 4 13 Contact Tachometer Measurements 1 Prepare for Contact measurements as described in the Measurement Preparation section above Determine if Surface Speed or Length measurements are to be made Refer to the section Surface Speed and Length Measurement Modes later in this guide for details Press and hold the MEASURE button Touch the measurement accessory cone wheel or concave accessory to the object under test Read the measurement result from the LCD display When the Measure button is released the last reading will remain on the display for 5 to 10 seconds before the Auto Power OFF feature switches the meter OFF The HOLD display icon will switch ON To change the unit of measure first release the MEASURE button Then momentary presses of the MODE butto
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