请大侠帮个忙啊？ mind values as mentioned in part. 6.5.1, correct accordingly and start again with the calibration. Note: If calibration is finished now, and no further settings of other parameters are required any more, save data as described in part 6.6. 6.5.5 Incremental calibration with make-up weights With larger weighing devices like tanks or silos, some small calibration weights are only available in relation to the total capacity. The calibration has to be performed in such cases by means of the relatively small amount of calibration weights plus a certain amount of dummy material like water, sand, etc. (make-up weight). See also advices as given in appendix 2. The first part of the calibration has to be performed according to the procedure as described in part 6.5.4. • After that display of: (36 • press key NEXT STEP Display shows either the actual weight, or zero if the scale is unloaded. Now load the scale with dummy material as closely as possible to the last calibration point. Add the available calibration weight. For example: dummy material of 510 kg (acc. to display), plus a calibration weight of 500 kg. press key NEXT STEP • display of: (37 press key PREV STEP ( ) until C35 is reached • display of: (35 press key NEXT STEP • Display of selected scale end value, e.g.: ( 03000 change at least one digit once, then OPERATING MANUAL PR 1612/02, Rel. $ 2.30 Page: 6 - 19 press key NEXT STEP During approx. 2 seconds: (Svpply is displayed. Subsequently, the display changes to the loadcell supply voltage set last, e.g.: ( 12 using key select the supply voltage of 12 V or 20 V as set at the PCB (see also part 6.5.1.3). e.g. ( 20 press key NEXT STEP During approx. 2 seconds, the display shows: defavlt • then it changes to ( 1 • modify into ( 0 press key NEXT STEP • • Display shows an undefined weight, e.g. 0152 press key NEXT STEP • Display shows selected f.s.d.,e g. ( 03000 enter correct weight value, i.e. dummy material of 510 kg and calibration weight of 500 kg. • display of ( 01010 press key NEXT STEP After a calculation time, the display must change to the next parameter C36 In case more calibration steps should be required, start again at point • . OPERATING MANUAL PR 1612/02, Rel. $ 2.30 Page: 6 - 20 Note: If calibration is finished now, and no further settings of other parameters are required any more, save data as described in part 6.6. If the calibration procedure is not finished, change from shown parameter C36 to C40 and continue. 6.5.6 Checking the linearity (accuracy) of the scale • LINEARITY/ACCURACY (36 press key NEXT STEP Display of e.g. 0950 Note: If desired, a 10 times higher resolution can now be selected with key in toggle mode , as the value will be shown inclusive of its decade 10 . -1 By means of this feature the linearity of the scale (also if being a multi-range scale) can be proved, for example for tests of the W&M authorities. This mode is limited to a scale resolution of # 6000 d. In this case the display could be e.g.: 009504 The weight value will be displayed in this mode without decimal point and dimension sign. By pressing key a print-out of the actual weight value with dimension sign can be generated, provided a printing device has been connected properly, and the corresponding parameter was set correctly. Depending on C55, the print-out is or is not acc. to W&M's. 6.5.7 Setting, modifying, or re-entering zero point, scale end, and span value without calibration weights Provided the mechanical conditions of the scale are 'ideal', as mistakes like force shunts will not be recognized and compensated, a calibration without weights is useful e.g. - if no W&M approval is required, - if many containers or tanks have to be installed, - if calibration weights (masses) cannot be used easily, - as preparation step for W&M approval, and - for re-entering or later modification of a previously set zero point-, scale end-, or spanvalue. The following parameter C37, C38, and C39 serve for setting and modification of zero point, scale end, and span value without calibration weights, or for re-entering these values if they are lost (e.g. due to a defective indicator). OPERATING MANUAL PR 1612/02, Rel. $ 2.30 Page: 6 - 21 In particular: C37 for - the modification of the zero point setting with an empty scale , as it could be required e.g. after a modification of its initial deadload, and - a new setting of the zero point at an empty scale without influencing the span. C38 for - re-entering the last valid zero point setting with a loaded scale by entering the corresponding mV/V value, without influencing the span, as it could be required after e.g. the replacement of a defective indicator. C39 for - re-entering the last valid scale end and span value with a loaded scale by entering the corresponding mV/V value, without influencing the zero point, as it could be required after e.g. the replacement of a defective indicator, or - setting scale end and span value of an empty scale (mV/V calibration). Note: In order to re-enter a.m. values it is necessary to have noted the corresponding scale and mV/V values of parameter C38 and C39 after the last valid calibration, or better to have them printed out them after the last valid calibration via parameter C58. 6.5.7.1 Modification of the zero point setting at an empty scale • select parameter (37 press key NEXT STEP During approx. 2 seconds (Svpply is displayed. Subsequently, the display changes to the loadcell supply voltage set last, e.g.: ( 12 using key select the supply voltage of 12 V or 20 V as set at the PCB (see also part 6.5.1.3). e.g.: ( 20 press key NEXT STEP display of e.g.: 0957 or in case of an initial calibration with a higher input voltage than 12 mV: Err 2 or Err6 OPERATING MANUAL PR 1612/02, Rel. $ 2.30 Page: 6 - 22 unload the scale completely ! display of e.g.: 0152 or still: Err 2 or Err6 press key ( ) Display shows: 0000 press key NEXT STEP display of parameter C38 6.5.7.2 Re-entering the last valid zero point setting with a loaded scale • select parameter (38 press key NEXT STEP During approx. 2 seconds (Svpply is displayed. Subsequently, the display changes to the loadcell supply voltage set last, e.g.: ( 12 using key select the supply voltage of 12 V or 20 V as set at the PCB (see also part 6.5.1.3). e.g.: ( 20 press key NEXT STEP During approx. 2 seconds, the display shows: ( deadl then it changes to the last, or factory-set zero point value [mV/V] • e.g.: ( 0.0290 enter deadload value as noted or printed-out after the last valid calibration (see note above), • e.g. 0.3 mV/V ( 0.3000 press key NEXT STEP after some calculation time display of parameter C39 OPERATING MANUAL PR 1612/02, Rel. $ 2.30 Page: 6 - 23 6.5.7.3 Re-entering the last valid scale end and span value with a loaded scale • select parameter (39 press key NEXT STEP display shows the last, or factory-set f.s.d, • e.g. ( 03000 If this value should have to be kept, one of the digits must be modified at least once, and changed back again, or • enter desired f.s.d., e.g. to: ( 06000 press key NEXT STEP During approx. 2 seconds (Svpply is displayed. Subsequently, the display changes to the loadcell supply voltage set last, e.g.: ( 12 using key select the supply voltage of 12 V or 20 V as set at the PCB (see also part 6.5.1.3). e.g.: ( 20 press key NEXT STEP During approx. 2 seconds, the display shows: ( span then it changes to the last, or factory-set sensitivity (span) value [mV/V] • e.g.: ( 1.0000 enter sensitivity (span) value as noted or printed-out after the last valid calibration (see note above), • e.g. 0.7675 mV/V ( 0.7675 press key NEXT STEP after some calculation time change to parameter C40. Note: If calibration is finished now, and no further settings of other parameters are required any more, save data as described in part 6.6. If calibration procedure is not finished, continue with C40. OPERATING MANUAL PR 1612/02, Rel. $ 2.30 Page: 6 - 24 6.5.7.4 Setting zero point, scale end, and span value without calibration weights For utmost accuracy of calibration without weights, check the certified values of - sensitivity C, and - output resistance R a of each used loadcell. These values are normally documented in a Manufacturer Test Certificate according to DIN 55350-18-4.22 and are available for loadcell types D1, C2, and C3 acc. to OIML. Calculate the sensitivity of a loadcell configuration by means of formula full scale deflection x sensitivity of one loadcell (C ) [mV/V] avr sensitivity [mV/V] = ---------------------------------------------------------------------------------- nominal load of one loadcell x number of loadcells As sensitivity per loadcell, enter - either the correct loadcell sensitivity of one loadcell as indicated in a.m. certificate, - or, with more than one loadcell and different sensitivities, their average value C . avr Example: loadcell 1= 1.01 mV/V, loadcell 3= 1.03 mV/V } average value C avr loadcell 2= 1.02 mV/V, loadcell 4= 1.04 mV/V } = 1.025 mV/V nominal load of one loadcell = 20 t f.s.d. = 60 t 60 t x 1.025 mV/V sensitivity = ------------------------ = 0.7675 mV/V 20 t x 4 • select parameter (37 press key NEXT STEP During approx. 2 seconds (Svpply is displayed. Subsequently, the display changes to the loadcell supply voltage set last, e.g.: ( 12 using key select the supply voltage of 12 V or 20 V as set at the PCB (see also part 6.5.1.3). e.g.: ( 20 press key NEXT STEP display of e.g.: 0957 OPERATING MANUAL PR 1612/02, Rel. $ 2.30 Page: 6 - 25 or in case of an initial calibration with a higher input voltage than 12 mV: Err 2 or Err6 unload the scale completely ! display of e.g.: 0152 or still: Err 2 or Err6 press key ( ) Display shows: 0000 press key NEXT STEP display of parameter C38. Skip parameter, and • select parameter (39 press key NEXT STEP display shows the last, or factory-set f.s.d, • e.g.: ( 03000 If this value should have to be kept, one of the digits must be modified at least once, and changed back again, or • enter desired f.s.d., e.g. to: ( 60000 press key NEXT STEP During approx. 2 seconds (Svpply is displayed. Subsequently, the display changes to the loadcell supply voltage set last, e.g.: ( 12 using key select the supply voltage of 12 V or 20 V as set at the PCB (see also part 6.5.1.3). e.g.: ( 20 press key NEXT STEP During approx. 2 seconds, the display shows: ( span OPERATING MANUAL PR 1612/02, Rel. $ 2.30 Page: 6 - 26 then it changes to the last, or factory-set sensitivity (span) value [mV/V] • e.g.: ( 1.0000 enter sensitivity (span) value as calculated (see note above), • e.g. 0.7675 mV/V ( 0.7675 press key NEXT STEP after some seconds of calculation time change to parameter C40. Note: If calibration is finished now, and no further settings of other parameters are required any more, save data as described in part 6.6. If the calibration procedure is not finished, continue with C40. 6.5.8 Continuation of the calibration procedure Note: Parameters marked with ° will be write-protected by setting switch CAL to position ¯c , and by a code number in C21. Parameter Function/Description Default value C 40/41 ° Standstill detection C 40 ° Standstill range 1 (1d) Adjustable for a range of 1.. 5 times the step width as adjusted in C32, in which a weight display standstill must be detected. Display standstill is as long as the difference between smallest and highest measured value of the time range as adjusted in C41 is smaller than the standstill range which must be adjusted. C 41 ° Standstill time 1 (0.3 sec) Determination of a time range in addition to the STANDSTILL RANGE under C40, in which a weight display standstill must be detected. Standstill display is as long as the difference between smallest and highest measured value within the adjusted time range of 1 to 7 times the measuring time adjusted in C34 is not higher than the STANDSTILL RANGE. The standstill detection sequence is progressive. It re-starts with each measuring cycle (see following diagram). 查看更多2个回答 . 2人已关注
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