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Minebea Intec PR 6221/12.5 t Installation Manual Download Page 15

4.2 Load disc kits

4.2.1

General notes

Note:

The load disc kit is

not

included in the equipment supplied with your load cell.

For the order numbers of the load disc kits, please refer to Chapter

11.2.2

.

4.2.2

Equipment supplied

4.2.2.1

Load disc kit PR 6021/00N

No.

Description

1

Upper load disc

2

Flexible copper strap

3

Lower load disc

4

Supporting ring

4 Speciications

Weighbridge Load Cell PR 6221

EN-13

Minebea Intec

Summary of Contents for PR 6221/12.5 t

Page 1: ...l PR 6221 Installation Manual Translation of the Original Installation Manual 9499 053 46800 Edition 1 4 0 11 30 2018 Minebea Intec GmbH Meiendorfer Str 205 A 22145 Hamburg Germany Phone 49 40 67960 303 Fax 49 40 67960 383 ...

Page 2: ...iied personnel In correspondence concerning this product the type name and release number serial number as well as all license numbers relating to the product have to be cited Note This document is partially protected by copyright It may not be changed or copied and it may not be used without purchasing or written permission from the copyright owner Minebea Intec The use of this product constitute...

Page 3: ... capacity 7 4 Speciications 8 4 1 Load cells 8 4 1 1 Equipment supplied with the load cell 8 4 1 2 General information 8 4 1 3 Possible marking of the load cell for the Ex area 9 4 1 4 Dimensions 9 4 1 5 Ordering information 10 4 1 6 Technical data 10 4 2 Load disc kits 13 4 2 1 General notes 13 4 2 2 Equipment supplied 13 4 2 3 Dimensions 17 4 2 4 Technical data 18 5 Installation 19 5 1 Safety in...

Page 4: ... Checking the zero output signal of the load cell 31 8 3 2 Checking the strain gauge bridge of the load cell 31 8 3 3 Checking the insulation impedance of the load cell 32 8 3 4 Checking the insulation impedance of the connecting cable 32 9 Maintenance repairs cleaning 33 9 1 Maintenance 33 9 2 Repairs 33 9 3 Cleaning 33 10 Disposal 34 11 Spare parts and accessories 35 11 1 Replacement parts 35 11...

Page 5: ...ved when measures for preventing hazards are not followed DANGER Warning of personal injury DANGER indicates death or severe irreversible personal injury which will occur if the corresponding safety measures are not observed Take the corresponding safety precautions WARNING Warning of hazardous area and or personal injury WARNING indicates that death or severe irreversible injury may occur if appr...

Page 6: ...r the environment may occur if appropriate safety measures are not observed Take the corresponding safety precautions Note User tips useful information and notes 1 6 Hotline Phone 49 40 67960 444 Fax 49 40 67960 474 eMail help minebea intec com Weighbridge Load Cell PR 6221 1 Introduction Minebea Intec EN 4 ...

Page 7: ...arded against the weighing installation turning over or being shifted thus eliminating danger to people animals or goods even in the case of a break in a load cell or mounting element Installation and repair work must only be carried out by expert qualiied personnel The load cell relects the state of the art The manufacturer does not accept any liability for damage caused by third party system com...

Page 8: ... damage the load cell If stops are used damage and measuring errors can be prevented without afecting the required space for movement in the direction of the measurement The lateral play of the weighbridge must always be restricted to the distance A see igure in the longitudinal and transverse direction by appropriate stops Consideration should be given to the fact that thermal expansion and contr...

Page 9: ...load cell or damage it If the safe load limit Elim of the load cell can be exceeded e g by falling loads then mechanical limiting in load direction is strongly recommended If the destructive load Ed of the load cell is exceeded there is danger of mechanical destruction 3 Setup instructions Weighbridge Load Cell PR 6221 EN 7 Minebea Intec ...

Page 10: ...n vironmental inluences Hermetically sealed by welding Filled with inert gas Protection classes in compliance with EN 60529 IP68 IP69 Dust proof and leak tight against water with harmful efects when immersed 1 5 m water depth 10 000 h and water jets high pressure and temperature Explosion Suitable for explosion subgroup IIC and IIIC Protection type Intrinsic safety for PR 6221 E Ambient temperatur...

Page 11: ...S CL I II III DIV 1 GP A B C D E F G Entity 4012 101 5688 NI CL I II III DIV 2 GP A B C D E F G 4012 101 5688 NIFW T4A Ta 40 C to 70 C T5 Ta 40 C to 55 C FM17US0276 all PR 6221 without E IS CL I II III DIV 1 GP A B C D E F G Entity 4012 101 5688 NI CL I II III DIV 2 GP A B C D E F G 4012 101 5688 NIFW T4A Ta 40 C to 70 C T5 Ta 40 C to 55 C FM17CA0138 all PR 6221 without E NOTICE Installation in th...

Page 12: ...C5 C6 Unit Accuracy class 0 015 0 012 0 010 0 008 Emax Minimum dead load lowest limit of speciied measu ring range Emin 0 Emax Maximum capacity highest limit of speciied mea suring range Emax see Chapter 4 1 5 Highest load without irreversib le damage Emax 12 5 t Elim 37 5 37 5 t Emax 20 t Elim 40 t Emax 25 t Elim 37 5 t Emax 30 t Elim 60 t Safe load limit Emax 50 60 75 t Elim 75 t danger of mecha...

Page 13: ...01 Cn Hysteresis max diference in LC output between loading and unloading dhy 0 0165 0 0125 0 010 0 008 Cn Temperature efect of the Smin max change of Smin per 10 K in the BT TKSmin 0 01 0 007 0 007 0 007 Cn 10 K Temperature efect on C max change of C per 10 K in the BT TKC 0 01 0 008 0 007 0 005 Cn 10 K Input impedance between supply terminals RLC 1080 10 Ω between measuring terminals RO 1010 1 Ω...

Page 14: ...ressure inluence inluence of barometric pressu re on output PKSmin 420 g kPa elastic deformation under maxi mum capacity Emax 12 5 t snom 0 2 0 2 mm Emax 20 t snom 0 4 mm Emax 25 t snom 0 5 mm Emax 30 t snom 0 5 mm Emax 50 t snom 0 8 mm Emax 60 t snom 0 9 mm Nominal delection Emax 75 t snom 1 1 mm Deinitionen nach VDI VDE 2637 Die angegebenen technischen Daten dienen allein zur Produktbeschreibung...

Page 15: ...h your load cell For the order numbers of the load disc kits please refer to Chapter 11 2 2 4 2 2 Equipment supplied 4 2 2 1 Load disc kit PR 6021 00N No Description 1 Upper load disc 2 Flexible copper strap 3 Lower load disc 4 Supporting ring 4 Speciications Weighbridge Load Cell PR 6221 EN 13 Minebea Intec ...

Page 16: ... Load disc kit PR 6021 02N No Description 1 Upper load disc 2 Flexible copper strap 3 Lower load disc 4 Supporting ring 5 Anti twist protection Weighbridge Load Cell PR 6221 4 Speciications Minebea Intec EN 14 ...

Page 17: ...4 2 2 3 Load disc kit PR 6021 04N No Description 1 Turboload disc 2 Flexible copper strap 3 Lower load disc 4 Supporting ring 4 Speciications Weighbridge Load Cell PR 6221 EN 15 Minebea Intec ...

Page 18: ... Load disc kit PR 6021 06N No Description 1 Turboload disc 2 Flexible copper strap 3 Lower load disc 4 Supporting ring 5 Anti twist protection Weighbridge Load Cell PR 6221 4 Speciications Minebea Intec EN 16 ...

Page 19: ...4 2 3 Dimensions PR 6021 00N 02N all dimensions in mm 4 Speciications Weighbridge Load Cell PR 6221 EN 17 Minebea Intec ...

Page 20: ... C Material Steel zinc plated chromated and sealed RoHS compliant Steel zinc plated chromated and sealed RoHS compliant Net weight 1 2 kg 1 3 kg 1 8 kg 2 0 kg Gross weight 1 3 kg 1 4 kg 1 9 kg 2 1 kg Note The load disc kits PR 6021 04N and PR 6021 06N do not it into the mounting kits PR 6021 01N and PR 6021 03N They only it into the mounting kits PR 6021 05N and PR 6021 07N Weighbridge Load Cell P...

Page 21: ...ation Do not lift or transport the load cell by pulling on the cable Avoid shock stress falling down hard shocks The load cell must be installed vertically and centrally in the mounting kit Load forces must act in the measuring direction of the load cell The load disc must not be subjected to transverse forces All contact points between load cell and load disc must be adequately greased NOTICE Cha...

Page 22: ... have to be carefully aligned Refer to igure To make it easier to get an exact vertical alignment the PR 6021 mounting kit is equipped with a mounting aid γ 1 The maximum permissible inclination must be strictly observed so that measuring accuracy is not adversely overly afected see igure Note The material properties and the shape of the load cells and load discs are perfectly matched to one anoth...

Page 23: ...rner load test and lead to errors in the shift test see Chapter 7 6 2 Turboload disc In diicult cases a specially designed upper load disc turboload disc can facilitate positioning in the exact center on the top of the load cell This uses an O ring to ensure that the load disc is positioned in the exact center on the top of the load cell see also Chapter 4 2 2 5 Installation Weighbridge Load Cell ...

Page 24: ...4 Keep the load cell cables away from power cables The distance between measurement cables and power cables and or components under high voltage should be at least 1 m reference value We recommend laying the load cell cables in separate cable trays or armored steel pipes Power cables should be crossed at right angles while taking into account the minimum distance of 1 m reference value 6 2 Load ce...

Page 25: ... milled grooves provides extraordinarily high insulation impedance even in moist environments The special valve with a GoreTech semi permeable membrane ensures permanent pressure compensation during luctuating temperatures and weather conditions and efectively prevents water from penetrating NOTICE Defective cable junction box due to penetration of water Special valve must not be removed 6 3 1 Lig...

Page 26: ...structions in order not to void any warranty claims In particular the entire installation including the power supply must be suiciently protected against lightning Simply connecting the protective grounding conductor is not enough 6 4 Cable connections Note All components are only shown schematically Color code bk black bu blue gn green gy gray rd red wh white Weighbridge Load Cell PR 6221 6 Conne...

Page 27: ...ikes near the scale Make sure to use cable junction box PR 6021 08 or PR 6021 68S see Chapter 11 2 4 Connect the ground as shown in the illustrations For more information see the cable junction box installation manual 6 Connection Weighbridge Load Cell PR 6221 EN 25 Minebea Intec ...

Page 28: ...or If the values are not found in the Calibration Certiicate enter 0 as a value The value listed under Output at max capacity on the Calibration Certiicate is entered in the indicator under LC rated output The value listed under Output impedance on the Calibration Certiicate is entered in the indicator under LC output impedance By performing these steps a logical and highly accurate reading normal...

Page 29: ...cale structure 6 Measure the output voltages of the load cells again and adjust the height of this load cell or of another one Carry out a mechanical height adjustment see Chapter 7 3 If the corners are now loaded in succession the same value must always be displayed on the connected device If this is not the case irst carefully check the vertical alignment of the load cells and ensure that the lo...

Page 30: ...atform supporting point below The resulting incline can change the sensitivity and thereby change the weight readout The measuring element is specially constructed to counteract this behavior within limits to ensure that even critical constructions maintain calibration error limits This error can be eliminated almost completely by intentionally turning the load cells as described in the table belo...

Page 31: ...d to the value of 0 0 kg depending on the platform s construction This increases the play for stack and of center loading errors 7 6 3 Systematically minimizing shift error Result Recommended action Step 1 No previous measurement The load cells are installed in such a way that all adjustment chambers point slightly outwards i e To the longitudinal edge of the weighbridge α 20 Step 2 If after corne...

Page 32: ...gher than at the beginning and end of the weighbridge Rotate all load cells back somewhat to approx α 10 In the center the readout is now lower than at the beginning and end of the weighbrid ge Rotate all load cells back somewhat to approx α 30 In the center the readout continues to be higher than at the beginning and end of the weighbridge Rotate all load cells by another 20 so that all adjustmen...

Page 33: ...oisture intruded Load cell Is the load cell vertical Is the adjustment chamber cover damaged Is the sheath of the load cell cable damaged Has moisture penetrated into the load cell cable 8 3 Metrological controls 8 3 1 Checking the zero output signal of the load cell Unload load cell Disconnect the load cell measuring outputs Check whether the output voltage without load is within the limits Model...

Page 34: ...hecking the insulation impedance of the load cell NOTICE Possible destruction of load cell Never apply test voltage between two cores of the load cell cable Insulate the load cell cores Max test voltage Standard version 100 V DC Intrinsically safe version PR E 500 V AC Insulation impedance Core housing Core screen Screen housing 5000 MΩ 5000 MΩ 0 Ω 8 3 4 Checking the insulation impedance of the co...

Page 35: ...d is highly reliable Should an electrical or mechanical defect nevertheless occur the load cell must be replaced Load cell repair is not possible 9 3 Cleaning Dirt on the load cell and movable parts of the scale must be cleaned as quickly as possible if it inluences weighing or if it is corrosive to the cell or cable material NOTICE Some cleaning agents may not be compatible with the load cell mat...

Page 36: ... unsorted municipal waste so that it can then be recycled Before disposing of or scrapping the product any batteries should be removed and taken to a suitable collection point Please see our T Cs for further information Service addresses for repairs are listed in the product information supplied with the product and on our website www minebea intec com We reserve the right not to accept products t...

Page 37: ...ti twist protection and lexible copper strap 10 mm2 250 mm long 9405 360 21071 5 Horizontal constrainer PR 6152 02 200 kN 9405 361 52021 N steel zinc plated passivated and sealed RoHS compliant 11 2 2 Load discs To install the load cell the following load discs are recommended No Description Order no 1 Load disc kit PR 6021 00N upper load disc lower load disc with supporting ring and lexible coppe...

Page 38: ...xplosion hazarded area 9405 361 36 1 4 PR 6136 01A armored for installation inside the explosion hazarded area 9405 361 36019 11 2 4 Cable junction boxes We recommend using the following junction boxes No Description Order no 1 PR 6021 08 polycarbonate 1 8 load cells IP65 not for PR 6221 E 9405 360 21084 2 PR 6021 68S 1 4404 1 8 load cells IP68 IP69 veriiable 9405 360 21684 Weighbridge Load Cell P...

Page 39: ...17CA0138 FM17US0276 7 EU Declaration of Conformity MEU17025 8 Declaration of Conformity MDC17003 9 Certiicate of Conformity TR CU 020 RU Д DE A301 B 05345 10 Test Certiicate PTB D09 03 15 11 Test Certiicate PTB D09 00 23 12 OIML Certiicate of Conformity PTB R60 2000 DE1 08 11 13 Supplementary Certiicate of Approval NMI S333A 14 Certiicate of Conformance NTEP 14 024A1 15 Certiicate of Approval NTEP...

Page 40: ...Published by Minebea Intec GmbH Meiendorfer Strasse 205 A 22145 Hamburg Germany Phone 49 40 67960 303 Email info minebea intec com www minebea intec com ...

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