Calibrator User Manual
Contents
1. Markers A Base Platform Balance Level Figure 1 Calibrator Full Assembly Base Platform X Axis Level Height Adjustment Y Axis Level Height Adjustment Swinging Arm Crossbar Release Switch Rebound Breaking Clip Balance Level Distance Markers Serial Number Sticker Nominal Values Sticker EZSpeed Calibrator Manual v1 1 Swinging Arm Weighted Serial Number i Sticker Y Axis Level Height Adjustment Mounting surface for components For leveling along the x axis For leveling along the y axis Weighted arm for measurement Crosses EZSpeed lasers Locks arm into starting position Prevents arm from bouncing back Shows the calibrator levelness Placement of EZSpeed Designated serial number Nominal speeds shown in mm s Page 5 of 16 EZSpeed Calibrator O EZ Metrology 2014 Manual v1 1 2 Operation s l 2 1 Leveling 1 Place the calibrator on a leveled firm surface that does not vvobble and does not have a steep gradient 2 Adjust the two feet at the left of the calibrator by loosening the silver adjustment knob and raising or lowering the loose adjustment nut until the bubble along the x axis is between the two black lines as shown 3 Adjust the foot at the right of the calibrator in the same manor until the bubble along the y axis is between the two black lines as shown Adjustment Knob Adjustment Nut Figure2. 3 2 2 Error Checking Simple error checking can be performed by using the calibration also 1 Repeat Steps 1 and 2 as above 2 Calculate the difference of 10 readings and take the maximum difference in reading see example below Distance Setting a a T s Speed setting Serial number L 695mmy s Nominal 7 5 8 E ue hi r g M Medium Figure 12 Example Table for Error Checking 3 Calculate you error using the formula AVmax x 100 age error e Vnominal By calibration standards a calibrated device should not have an error of more than 5 from the nominal attempt to open repair or tune the device and contact the CAUTION In case device gives erratic reading do not supplier immediately 3 3 Specifications and Characteristics Physical Characteristics Dimensions L480mm x H238mm x D150mm Accuracy Page 13 of 16 nr EZSpeed Calibrator O EZ Metrology 2014 Manual v1 1 Each device is inclusive of a two year warranty Some services and repairs are covered within the warranty period free of charge To know about the detail of warranty terms and conditions contact the supplier Page 14 of 16 EZSpeed Calibrator O EZ Metrology 2014 Manual v1 1 CALIBRATION TABLE 00 c d o Uu 0 Q m Q Speed setting Serial number Net average Net average
3. Net average 00 OO 00 p ds IN UNIOS p ds p ds Mol 7 p ds p ds 481 H paads Page 15 of 16 EZSpeed Calibrator O EZ Metrology 2014 Manual v1 1 ERROR CHECKING TABLE Distance Setting Speed setting uzunu number Speed v umumi mim Speed v Error Av Speed v Error Av 2 20 7 gw i val aE 02 zi es 11 m 1 811781888 777 57000 peoos Too T ISSO IESO AOS II y Ps fo IESO IESO ISO FE s 7 fo Se oe fof V E o se1 91 1 01 00 0772188171 82 8 tof ermarim Max error___ age A A 414v8 5 E 1 811 887 B gt E 3 Jo 17 AAA Q 1 57 10vV R 20 89 15 05 11 81 l E 1571 2182 2 ees E 2 pls pp 2 AS 3 gt 2 AA Neri mm s Nominal 5 o o o a E bo o Uu o o o o Z D x lt 3 age Page 16 of 16
4. 2 Height Adjustment Assembly Figure 3 How to Adjust Height Page 6 of 16 EZSpeed Calibrator O EZ Metrology 2014 wf Manual v1 1 2 2 Taking Measurements 1 Mount the EZSpeed such that the rear of the device is lined up with the desired distance marker D1 D2 D3 See the EZSpeed Manual for mounting instructions Figure 4 Positioning for D1 left and 3 Positions of EZSpeed on Calibrator right 2 Lift the arm out of the cradle by the crossbar ch 37 m Figure 5 Proper Crossbar Release 3 Lock the arm into the desired position high medium low using the release switch Figure 6 Various Arm Positions Page 7 of 16 BS mi EZSpeed Calibrator O EZ Metrology 2014 gt Manual v1 1 4 Press the release lever firmly to drop the measurement arm Figure 7 Pressing release switch The speed measurement will appear on the EZSpeed display Figure 8 Measurement displayed Page 8 of 16 r ol EZSpeed Calibrator EZ Metrology 2014 Manual v1 1 Ideal Situation Figure 9 Laser projection in actual and ideal situation The main principle of operation of the EZSpeed is based on the measurement of velocity by dividing distance over time When a surface moves perpendicular to the lasers it will trigger each one at different times When it crosses the first laser its light is reflected back at the object When this light falls on a light dependent resistance LDR diode this cir
5. 7 5 T1echnical n o Malo Miseria ia 9 3 1 as 2011 2 9 3 2 Calculation of Calibration Factor and Error Checking 12 eyed os ADAIN T OCC PAP a air oe o 12 0 EL O ls IP q 13 3 3 Specifications and CharacteriStiCS ooccconccconncconncconnconnnconnnnnnnonnnnnnnrnnnnnnnnnnnnnnnnonnnonaninnnos 13 Ay Warranty Into mat scsi ice 14 Page 2 of 16 Manual v1 1 Table of Figures nr ol EZSpeed Calibrator EZ Metrology 2014 Figure 1 Calibrator Full ASSeMbDly ooccccccnccccncocnncconccocnnoncncnncnonnnononnnnnnnnonnnonnnnnnnnnnnnnnnnrnnnnnnnnnos 4 Figure 2 Height Adjustment ASSeMbly occcocccccccncoccncccnccocnconcnonncnnnnnnnnnnnonnnnnncnnnnnnnnnnnonnnnnnrnnnnnnnnnrs 6 Figure 3 HOW to Adjust ARCO seriada oa 6 7 Figure 5 Proper Crossbar 1 5 6 7 Figure 6 Various Arm Positions ies 8 Figure 7 Pressing Release M C y aa tula 8 Figure 8 Measurement 8 Figure 9 Principle of Operation 222 9 Figure 10 Geometry of motion of calibrator arm and laser projection 10 Figure 11 Example
6. Table for Calibration coooccccocnccccncoccononnononncnnnnonncnnonnnnnnnnonnnnnnnnonanononnnnos 12 Figure 12 Example Table for Error Checking ooccccccnccccncoccncoccccncnnnncncnncnnonnnnnnnnonnncnncnnnannnnnnnnos 13 Page 3 of 16 nr ol EZSpeed Calibrator EZ Metrology 2014 Manual v1 1 1 Getting Started Before using the device please go through the user manual Instructions carefully The EZSpeed Calibrator is used to calibrate the EZSpeed device to confirm repeatability reproducibility accuracy and precision of the EZSpeed device 1 1 Precautions I Always place the calibrator on a firm level surface for easier use ii Do not operate without correctly leveling the calibrator using the level gauge and height adjustment feet 111 Do not obstruct the motion of moving parts as it will affect the speed readings taken calibrator unless instructed by supplier to do so Doing this CAUTION Do not attempt to open loosen any part of the may cause the loss of nominal calibrator readings iv Do not bend the rebound breaking clip too much or too frequently This will weaken the clip and cause loss of functionality Page 4 of 16 O EZ Metrology 2014 1 2 Component Description The following image shows the calibrator along with its various components Am sTe sp ao TD Rebound Breaking Clip X Axis Level Height Adjustment Nominal Values Sticker Weighted nr a
7. User Manual EZSPEED CALIBRATOR Transforming the World of Metrology one Device at a Time Document version control Version Version Information Y Apr 28th 2014 Legal All rights reserved The information contained in this document is confidential It may also be proprietary and trade secret to EZ Metrology Without the prior written approval of EZ Metrology no part of this document may be reproduced or transmitted to person or persons outside your organization in any form or by any means including but not limited to electronic mechanical photocopying or recording or stored in any retrieval system of whatever nature Use of any copyright notice does not imply unrestricted public access to any part of this document From time to time we may present updated versions of this document in order to make corrections clarifications or other changes These updated versions will supersede any earlier versions of the document Crystal Glen Center Suite 600 39555 Orchard Hill Place Novi Mi 43375 Phone 248 348 5771 Fax 248 348 5760 METROLOGY Info ezmetrology com nr ni EZSpeed Calibrator O EZ Metrology 2014 Manual v1 1 Table of Contents Dn oo E AAA E EE O E 4 LI OC DUN e 4 1 2 Component Uescripiion uu yaa 5 2 UDpeaonucun n ba n D b 6 2 6 2 2 TAKING Meas remenis U ea a ala
8. age 9 of 16 EZSpeed Calibrator O EZ Metrology 2014 Manual v1 1 y Es Figure 10 Geometry of motion of calibrator arm and laser projection Since the EZ speed uses a time calculation for velocity reference we calculate that time taken to fall from height h is given by 2h where g is acceleration due to gravity The above equation will give time taken to fall from pt A to pt G the time take to fall to pt C can be calculated by subtracting height d from h and will be given by 2 h d Hence the total time taken to move from pt C to pt G can be calculated by subtracting ii fro i 2h 2 h d tcc Cac Cac g m g ee See dr eee da iii Hence the nominal velocity that the EZ speed would calculate in an ideal situation would be Substituting for t using eqn i we iv a n 1 1 4 2 9 Similarly for a non ideal situation the time measure by EZ speed will be the time taken from B to G can be calculated as A 2h 2 h x vi att aed nn AL BG AG AB g g Page 10 of 16 Continued on next page nr EZSpeed Calibrator O EZ Metrology 2014 Manual v1 1 Hence the velocity calculated by EZ speed will be given by d ite steel UD d Ve 2h 2 h x 2h 7 1 1 V vg Vg J TR Solving for X we get d 2 x n 1 1 E out Ad x d Ad and p tan0 sox
9. cuit starts an internal timer A similar signal is generated when the object crosses the second laser and the timer is stopped Thus the timer calculates the time difference between the two incidences which is the time taken for the object to cross the second laser after the first laser is triggered In an ideal situation If this time tin seconds and the distance between the laser which is a constant of 35mm 4 the velocity in mm s is given by v t In a realistic situation however since the projected distance is d there is an error in the velocity calculation Hence if time take is now and the projected distance is x the measured velocity will be U instead of v i ot This is because the EZSpeed cannot measure the projected distance and assumes it to be same as in case of a realistic situation Thus to adjust this to get back the correct value of velocity we use the above 2 equations to get d x x t sov v x v v d Here the factor x d is known as the calibration factor Theoretical method for estimation The calibration factor can be estimated by using simple principles of geometry and newton s laws applied to free fall motion Assuming the calibrator arm to fall freely under gravity in a straight line neglecting frictional and rotational factors let the arm fall from a designated height h from the initial release point to the point where it crosses the second laser see fig below P
10. d D tan 8 ix d Dtan6 n 1 1 2 eee vt We also know that From viii and ix we get From v and x we get dy d 3 Dtan6 dy d h 1 1 Dtano a 1 1 2 Jor 1 1 vt vot h vot vt d substituting Vo we get a E 4208 Ee A EE Vo Xv Vo uv Ve V W vV t W vv v d Hence we get 2 2 E 542 and gt ae wane a ssa 1 1 Substituting for t using 1 we get g 2 1 1 8h o ano 2D ve 2 v 2 424 XU We can now use the above formula put in value of calculated velocity v at any given distance D and using nominal value of velocity v we can calculate the skew angle 0 We can now simply use eqns ix vii and iv to get d 1 Ja Vactual _ h calibration factor fq 1 c 1 1 This way the calibration factor takes into account the natural skewing that occurs between lasers Realistically they are not perfectly parallel and the actual projected distance between them at a certain distance away from the device could be greater or less than 35mm Note The above theorem does not take into consideration factors due to friction and curvature of the path of the arm In real situations those factors will also have to be taken into account Page 11 of 16 B m EZSpeed Calibrator O EZ Metrology 2014 Manual v1 1 3 2 Calculation of Calibration Factor and Error Checking The EZ Speed calibrator can be us
11. ed to calculate the calibration factor and to check errors in actual measurements By placing the EZSpeed at different distances and measuring and comparing the values measured by EZSpeed to the nominal value we can calculate calibration factor for devices that are not calibrated or check error in calibrated devices 3 2 1 Calibration Process 1 Place the EZSpeed in any one of the locations D1 D2 and D3 refer to topic 2 2 taking measurements 2 Starting with the lowest speed setting take 10 readings at each distance and each speed and tabulate your results Here is an example below Distance Setting Speed setting 695mm s Nominal x 0 0 un pe mb par a uw ET 4 a WI 985mmfs d Setting M Medium inal Figure 11 Example Table for Calibration 3 Calculate the average of all readings at a particular speed and compare with the nominal Each speed setting will have different calibration factors based on the geometry of motion Once the data has been collected you can share the data with the distributer supplier who will calculate the calibration factor and give a code 6 Input this code in the device to calibrate it random codes Doing this may lock the device permanently CAUTION Do not attempt to tune device by entering and render it inoperable Page 12 of 16 T 2 EZSpeed Calibrator EZ Metrology 2014 aw Manual v1 1
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