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1、STD-JIS B 7bOb-ENGL 1997 D Li933608 0548079 045 m J IS JIS B 7 6 0 6 1 9 9 7 JAPANESE I N DU STR IAL STANDARD Translated and Published by Japanese Standards Association Belt weighers ICs 53: 040.10 Descriptors : belt conveyors, packages, FIBC, velocity measurement, volume measure- Reference number :
2、 JIS B 7606 : 1997 (E) ment, instrument scales 11 s Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 22:58:51 MDTNo reproduction or networking permitted without license from IHS -,-,- B 7606
3、 : 1997 Foreword This translation has been made based on the original Japanese Industrial Standard revised by the Minister of International Trade and Industry through deliberations at Japanese Industrial Standards Committee in accordance with the Industrial Standardization Law. Consequently, JIS B 7
4、606 : 1991 (former edition) is replaced with this Standard. JIS B 7606 : 1997 contains Annex as under : Annex Test chains. Date of Establishment: 1991-03-01 ,Date of Revision: 1997-03-20 Date of Public Notice in Oficial Gazette: 1997-03-21 Investigated by: Japanese Industrial Standards Committee Div
5、isional Council on Precision Machinery JIS B 7606 :1997, First English edition published in 1997-11 Translated and published by: Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107 JAPAN c In the event of any doubts arising as to the contents, the original JIS is to be the final au
6、thority. 8 JSA 1997 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Printed in Japan Copyright Jap
7、anese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 22:58:51 MDTNo reproduction or networking permitted without license from IHS -,-,- JAPANESE INDUSTRIAL STANDARD JIS B 7606 : 1997 Belt weighers 1 Scope Th
8、is Japanese Industrial Standard specifies the belt weighers with a maximum instantaneous load of not less than 15 kg which detect electrically the mass of various kinds of bulk materials and products being transported continu- ously by a belt conveyor and the belt speed and measure the transported q
9、uantity on the basis of both values. Belt weighers attached with controller which supply a fixed quantity, are excluded. Remarks : The following Standards are normative references to this Standard : JIS Z 8103 Glossary of terms used in instrumentation JIS Z 8306 General rules for scale of industrial
10、 instruments 2 Definitions For the purposes of this Standard, the definitions given in JIS Z 8103 and the following definitions apply : (1) measuring roller A roller mounted in contact with the belt for transmitting the mass of measured material to the load detector. (2) load receiving stand The fra
11、me which attaches the measuring roller. (3) measuring capacity The mass of measured material per unit hour which can be measured and transported satisfying the performance. The upper limit is called the maximum measuring capacity and the lower limit is done so the minimum measuring capacity. (4) mea
12、suring range The range of use of the belt weighers indicated by the maximum measuring capacity and the minimum measuring capacity. (5) working length The part of belt and its effective length on which the mate- rial to be measured equivalent to the mass to be transmitted to the load detec- tor is lo
13、aded, The effective length shall be as follows according to the number of measur- ing rollers: (a) case of single roller 1 of the sum of the distances between the axis of measuring roller and the axes of carrying rollers adjacent to the both ends of it. (b) case of plural rollers The length oflthe d
14、istance between the axes of measuring rollers at both ends to which 2 of the sum of the distances between the axes of these measuring rollers and the axes of the carrier rollers adjacent thereto is added. (6) instantaneous load The material being measured which lies on the working length instantaneo
15、usly during the measurement and transportation. The ma- terial being measured at the time of the maximum measuring capacity is called the maximum instantaneous load. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie No
16、t for Resale, 03/15/2007 22:58:51 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS B 7bOb-ENGL 1997 m Li933b08 0548082 b3T Grade Grade R0.5 2 B 7606 : 1997 Tolerance( l) 10.5 % of transported mass (7) speed detecting device A device which detects the transported quan
17、tity on a belt or the transporting speed. _ _ _ _ _ _ Grade R2.0 Grade F0.5 12.0 % of transported mass 10.5 % of reference value(2) at the maximum measuring capacity (8) integrating indication device A device which indicates the mass trans- ported by belt conveyor by integrating. Grade F1.O Grade F2
18、.0 (9) test chain An instrument used in testing for the error of integrated value to which rotary weights are connected in a chain link form to have the specific mass per unit length. 11.0 % of reference value(2) at the maximum measuring capacity 12.0 % of reference valueP) at the maximum measuring
19、capacity 3 Classification Belt weighers shall be classified according to the structure into the following two types. (1) Integrated type Belt weighers with integrated belt conveyor, load detecting device, and speed detecting device. (2) Attached type Belt weighers for which the load detecting device
20、 and speed detecting device are attached to the belt conveyor installed on site. 4 Grade Belt weighers shall, according to the performance, be divided into six grades of grade R0.5, grade R1.O, grade R2.0, grade F0.5, grade F1.O and grade F2.0. 5 Performance 5.1 Measuring range The measuring range s
21、hall be according to the type, as follows : (1) Integrated type 20 % to 100 % of the maximum measuring capacity. (2) Attached type 35 % to 100 % of the maximum measuring capacity. 5.2 Error of the integrated value The error of the integrated value shall, in each grade, not exceed the value shown in
22、Table 1. Table 1 Tolerance on the error of integrated values I Grade R1.O I 11.0 % of transported mass I Notes (l) The tolerance shall be the value nearest the calculated value and the integer multiple of the scale interval of integrating indication device. (2) The mass of the material to be measure
23、d transported during the same time at the maximum measuring capacity and obtained by the following formula : Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 22:58:51 MDTNo reproduction or n
24、etworking permitted without license from IHS -,-,- STD-JIS B 7bOb-ENGL 1997 4933b08 0548083 57b Grade Grade R0.5 3 B 7606 : 1997 Tolerance() Integrated type Attached type 10.05 % of reference value(2) at the maximum measuring capacity 10.075 % of reference value(2) at the maximum measuring capacity
25、1 O00 =Q,xtx- Q 3 600 MxQ, S = Grade R1.O Grade R2.0 Grade F0.5 Grade F1.O where, S : reference value (kg) 20.1 % of reference valueP) at the maximum measuring capacity 10.2 % of reference value(2) at the maximum measuring capacity 10.15 % of reference valueP) at the maximum measuring capacity 10.3
26、% of reference value(2) at the maximum measuring capacity k0.15 70 of reference value(2) at the maximum measuring capacity 10.3 % of reference value(2) at the maximum measuring capacity 10.25 % of reference value(2) at the maximum measuring capacity k0.45 % of reference value(2) at the maximum measu
27、ring capacity Q : M : QM : t : measuring capacity at the time of operating (tk) mass of measured material which was transported (kg) maximum measuring capacity (t/h) time required for transportation (s) k0.6 % of reference value(2) at I the maximum measuring capacity Grade F2.0 I 5.3 Error of zero p
28、oint When operating with no load, the error of integrated value shall not exceed the value given in Table 2 in each grade and type. I 10.9 % of reference value(z) at the maximum measuring capacity Table 2 Tolerance on the error of zero point 0.005 % of the mass transported when operating I for one h
29、our at the maximum measuring capacity. - Grade R2.0 and Grade F2.0 Grade Grade R0.5 and Grade F0.5 Grade R1.O and Grade F1.O Tolerance( 0.001 3 % of the mass transported when operating for one hour at the maximum measuring capacity. 0.002 5 % of the mass transported when operating for one hour at th
30、e maximum measuring capacity. 5.4 Measuring properties 5.4.1 Stability of zero point When operating for three minutes with no load, the error of integrated value shall not exceed the value given in Table 3 in each grade. Table 3 Tolerance on the stability of zero point Copyright Japanese Standards A
31、ssociation Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 22:58:51 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS B 7bOb-ENGL 1777 4733b08 0548084 402 Grade Grade R0.5 and Grade F0.5 4 B 7606 :
32、1997 Mass of load applied 0.05 % of the mass of the maximum instantaneous load 5.4.2 Sensitivity There shall be an error between the integrated values of two cases where operating without load and where operating with a load of mass equivalent to the value given in Table 4 in each grade. Grade R1.O
33、and Grade F1.O Grade R2.0 and Grade F2.0 - 0.1 % of the mass of the maximum instantaneous load 0.2 % of the mass of the maximum instantaneous load Grade Grade R0.5 and Grade F0.5 Grade R1.O and Grade F1.O 5.5 Shift error The error of integrated value caused by shift of load shall not exceed the valu
34、es given in Table 5. Tolerance() 10.18 % of the mass transported 10.35 % of the mass transported Table 5 Tolerance on shift error and on environmental resistance I I Grade R2.0 and Grade F2.0 I 20.7 % of the mass transported 5.6 Environmental resistance 5.6.1 Temperature In the temperature circumsta
35、nce where the operating tem- perature range is indicated (if not indicated, -10 O C to +40 OC), the error of inte- grated value shall not exceed the tolerance in Table 5. The indicated operating temperature range shall be of the difference of 30 “C or more between the upper limit and the lower limit
36、. 5.6.2 Humidity In the environment of 20 “C in temperature and 50 % in relative humidity ; and the environment of the upper limit of the indicated operating tem- perature range (+4OoC if not indicated) and the relative humidity of 85 %, the error of integrated value shall not exceed the values give
37、n in Table 5. 5.6.3 Fluctuation of power source voltage When operating at the voltage be- tween 85 % and 110 % of the rated voltage indicated, the error of integrated value shall not exceed the values given in Table 5. 5.6.4 Instantaneous power interruption The difference between the integrated valu
38、e in a state where the power source voltage stops or drops instantly and the one in normal state shall not exceed the values given ip Table 5. 5.6.5 Burst The difference between the integrated value in a state where burst is applied to the main power source and the one in a state of no burst is appl
39、ied shall not exceed the values given in Table 5. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 22:58:51 MDTNo reproduction or networking permitted without license from IHS -,-,- 5 B 7606
40、 : 1997 5.6.6 Static electricity discharge The difference between the integrated value in a state where aerial discharge of static electricity is given to a part of belt weigher (except belt conveyor) and the one in a state of no aerial discharge shall not exceed the values given in Table 5. 5.6.7 E
41、lectromagnetic wave sensitivity The difference between the integrated value in a state of being exposed within electromagnetic field and the one in a state of not being exposed shall not exceed the values given in Table 5. 6 Composition, structure and function 6.1 Composition The belt weigher shall
42、be composed of belt conveyor, load de- tecting device, speed detecting device, auxiliary device and integrating device; suit- able for using condition intended and material to be measured; and designed so that actual machine test is possible in a state of being installed. 6.2 Structure and function
43、The structure and function of belt weighers shall be as follows : 6.2.1 Belt conveyor The belt conveyor shall be able to transport smoothly the material to be measured with a measuring capacity within measuring range and to transmit correctly the mass of measured material to the measuring roller via
44、 the belt. 6.2.2 Load detecting device The load detecting device shall be as follows : The measuring roller shall have a concentricity of a degree not affecting the performance of belt weigher and able to rotate smoothly and be fixed firmly on the load receiving table so as not to shift toward the m
45、oving direction of belt during the operation of belt conveyor. The load receiving table shall be fixed firmly so as not to shift toward the moving direction of belt during the operation of belt conveyor. The load transmission part shall be able to transmit certainly the load placed on the load recei
46、ving table to the load detecting device. The load detecting device shall be mounted so as not to be affected by offset load. In addition, in the load detecting device which can, with the test of its single unit, check simply the performance of belt weigher, there shall be no difference of the direct
47、ion of the force working on the load detecting device between at the time of simple check and at the time of operation of the belt weigher. 6.2.3 Speed detecting device The speed detecting device shall be able to trans- mit accurately the transported amount of belt or the signal in proportion to tra
48、ns- porting speed to the related device. 6.2.4 Auxiliary device The auxiliary device shall not affect the measuring per- formance. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/15/2007 22:58:51 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS B 7bOb-ENGL 2797 Li933b08 05Li808b 285 6 B 7606 : 1997 6.2.5 Integrating device The integrating device shall be as follows : The calculating device shall be able to accurately calculate and integr