R76 - 1 Cov Lus Pom Zoo Thoob Ntiaj Teb rau Tsis - Tsis Siv Neeg Uas Muaj Ua rau xoom taw tes thiab xoom teeb tsa qhov teeb meem tseem ceeb tshaj plaws, tab sis kuj tseem muaj kev ruaj ntseg ntawm lub ntsuas kev ntsuas yog qhov yooj yim lav ntawm qhov ntsuas kev ntsuas. Cov ntsiab lus hauv qab no yog ze ze rau lub voj voos, peb piav qhia, txheeb xyuas qhov thib.
(1) Qhov yuam kev yuam kev: qhov sib txawv ntawm cov nqi qhia tau ntawm cov nplai thiab tus nqi tseeb ntawm cov sib xws (kev sib raug zoo).
(2) Qhov kev tso cai tshaj plaws: rau ib qho kev ntsuas uas yog nyob rau hauv cov chaw siv thiab tau teeb tsa qhov sib txawv ntawm nws cov qauv muaj txiaj ntsig lossis qhov hnyav tau pom zoo.
(3) Xoom Ntaus: Ib lub cuab yeej uas teeb tsa tus nqi tau qhia rau xoom thaum tsis muaj load ntawm cov cab kuj. Rau hauv tshuab hluav taws xob, suav nrog: semi - tsis siv neeg xoom ntaus ntawv, tsis siv neeg xoom ntaus ntawv, ntaus ntawv pib, xoom nrhiav ntaus ntawv.
(4) Xoom Qhov Tseeb: Tom qab cov nplai yog xoom, cov nyhuv ntawm xoom yuam kev ntawm qhov kev hnyav yog li hauv ± 0.25E.
(5) xoom point yuam kev: Tom qab kev tiv thaiv, lub voj voog taw tes qhia qhov yuam kev tus nqi, qhov kev tso cai tshaj plaws hauv lub ± 0.5E ntawm thawj calibration.
(6) xoom kawg nrhiav ntaus ntawv: ib qho khoom siv uas cia li khaws cov xoom qhia txog tus nqi nyob rau qee qhov ntau. Xoom nrhiav ntaus ntawv yog tsis siv neeg xoom ntaus ntawv.
Xoom nrhiav cov cuab yeej tuaj yeem muaj plaub lub xeev: Tsis yog, tsis txhob khiav, khiav, tawm ntawm kev ua haujlwm.
Lub xov xoom nrhiav tau tso cai ua haujlwm thaum:
- Cov nqi qhia tau yog xoom, lossis qhov sib npaug ntawm qhov tsis zoo tso tawm phaus thaum lub ntsej muag tag nrho;
- Thiab qhov sib npaug yog nyob rau hauv kev ruaj khov;
- Kev kho lus tsis muaj ntau dua 0.5 E / s.
1. Xoom Saib Xyuas Ntaus Ntaus Ntawv
Raws li feem coob ntawm cov khoom sib npaug hauv Suav teb tam sim no, yog qhov yuav tsum tau sim cov xoom tshaj lij, yog li yuav tsum paub tseeb tias lub xoom taug kev tsis tuaj yeem ua haujlwm. Tom qab ntawd, lub xov tooj xoom nrhiav "tsis khiav" tsuas yog txoj kev ua kom muaj qee txoj kev ntawm kev thauj khoom ze ntawm lub voj voog dhau ntawm kev ua haujlwm dhau los.
(1) Txiav txim siab qhov kev kho kom raug ntawm xoom nrhiav cov cuab yeej
Vim yog cov txheej txheem kev siv hluav taws xob thiab cov txheej txheem kev ntsuas hluav taws xob kho kom sai dua, kom muaj qee tus neeg uas tau ua kom zoo dua qub, kom pom tias muaj qee qhov kev kho kom zoo dua qub, kom pom tias muaj qee qhov khoom ntawm cov khoom lag luam ntawm cov khoom lag luam yog zoo heev. Vim li no, tus kws sau ntawv sau ua haujlwm hauv txoj kev ua haujlwm tiag tiag, koj tuaj yeem sai sai hauv daim teb los kuaj xyuas cov xo xoom.
Qhib lub zog, ruaj khov rau tsawg kawg 30min, muab ib lub load ntawm 10E ntawm lub thauj khoom, yog li ntawd cov nplai "yog tawm ntawm kev ua haujlwm. Maj mam thov ib qho 0.3e load ntawm kev sib nrug ntawm txog 2s thiab saib tus nqi.
Tom qab 3 0.3e loads, nplai qhia tau tias muaj kev nce qib tseem ceeb ntawm ib pawg, qhia tias cov cuab yeej tsis ua haujlwm lossis tsis ua haujlwm.
Yog tias cov nplai tsis pom tseeb hloov tus nqi tom qab 3 loads ntawm 0.3e, chav tsev tseem tab tom ua haujlwm tsis pub dhau 0.5E / s.
Tom qab ntawd, maj mam tshem tawm 3 0.3e loads thiab cov nplai yuav tsum tau txo qis ntawm ib feem.
Vim li cas 3 0.3e loads raug siv?
Lub 0.3e load yog tsawg dua li kev kho kho ntawm 0.5E / s; Thiab 3 0.3e loads yog ntau dua 0.5E / s thiab tsawg dua qhov kev kho tus nqi kho ntawm 1e / s (vim tias qhov kev kho kom kho tau zoo ntawm 0.5e / s sib nrug).
(2) qhia meej npaum li cas load ntau dhau ntawm cov xoom tracking ntau
R76, thaum lub sijhawm ntsuas ntawm cov lus nug, xav tau ib lub nra ntawm 10E yuav tsum muab tso rau ntau tshaj qhov chaw taug qab. Vim li cas tsis yog 5e loads, vim li cas tsis 2e loads?
Txawm hais tias nyob rau hauv cov lus qhia thoob ntiaj teb thiab peb cov kev cai lij choj cuam tshuam yog "0.5E / s) Txawm tias qee qhov hnyav ntsuas cov chaw tsim khoom, teeb tsa qhov kev kho siab tshaj plaws (tam sim no pom qhov kev kho siab tshaj plaws ntawm 6E / s).
2. Xij Cov Ntsuam Xyuas
If the weighing instrument does not have zero tracking function, or there is a special switch to close the zero tracking device, in the detection of “zero accuracy” and “zero error”, there is no need to put additional load (10e). The problem is that most of the weighing instruments in China are not equipped with a switch that can close the zero tracking device, and they all have the zero tracking function, so in order to get the zero error, we have to put an additional load (10e) to make it go beyond the zero tracking range when the scale is unloaded, so that we can get the accuracy of the zero setting “near zero” and the “zero error”. This results in a “near zero” zeroing accuracy. Sequentially place 0.1e additional weights until the value increases significantly by one division (I+e), and the total of the additional weights is ∆L, so that the zeroing error is: E0=10e+0.5e-∆L-10e=0.5e-∆L≤±0.25e. If the total of the additional weights is 0.4e, then: E0=0.5e-0.4e=0.1e<±0.25e. .
3. Meaning of determining zeroing accuracy
Lub hom phiaj ntawm kev txiav txim siab qhov tseeb ntawm kev teeb tsa yog kom ntseeg tau tias kev suav ntawm txoj kev kho ua ntej "kev kho ua ntej kev kho kom tiav hauv kev ntsuas hluav taws xob. Thaum kuaj xyuas qhov tseeb ntawm cov nplai, kev txhim kho - Kev kho lus yuam kev tuaj yeem tau los ntawm cov qauv: e = i + 0.5 - ΔL - l. Txhawm rau kom paub meej qhov yuam kev ntawm cov kev ua yuam kev ntawm cov nplai, nws yog ib qho tsim nyog los kho nws los ntawm lub voj voog point yuam kev, I.e. EC = ECHMPE.
Tom qab kho qhov yuam kev ntawm lub qhov hnyav los ntawm kev ua yuam kev uas yog qhov tsim nyog tau ua yuam kev, lossis kom kho cov nqi uas zoo li tsis pub dhau qhov tsis tsim nyog. Txawm li cas los xij, txawm hais tias qhov kev kho yog tsim nyog lossis tsis tsim nyog, lub hom phiaj ntawm kev siv cov ntaub ntawv xoom yuam kev yog txhawm rau txhawm rau txhawm rau kom ze rau qhov tseeb ntawm cov nplai.
4. Xoom kev txiav txim siab
Ua ntej tshaj plaws, txoj kev ntsuas hluav taws xob yuav tsum txiav txim siab lub xo taw kev ua yuam kev ntawm cov khoom thauj khoom, tom qab ntawd nws tau txiav txim siab txog qhov hnyav ntxiv, tom qab ntawd nws tau txiav txim siab txog cov khoom siv thauj khoom ntxiv, tom qab ntawd nws tau txiav txim siab txog qhov hnyav tshaj plaws Taw tes, e = 10e + 0.5 e = 10e + 0.5e - ΔL - 10E = 0.5E - ± 0.5E. Yog tias qhov hnyav ntxiv sau ntxiv rau 0.8E, tom qab ntawd: E0 = 0.5e - 0.8e = - 0.3e<±0.5e.
Lub sij hawm Post: Aug - 14 - 2023