JJF(浙) 1207-2024 數(shù)字折射儀及含量計校準(zhǔn)規(guī)范

CalibrationspecificationofDigitalRefractometers參加起草單位：廣電計量檢測(杭州)有限公司JJF（浙）1207-2024I （II） （2） （2） （2） （2） （4） （6） （6） （9） （20） （21）IIJJF1001-2011《通用計量術(shù)語及定義》、JJF1071-2010《國家計量校準(zhǔn)規(guī)范編寫規(guī)則》和JJF1059.1-2012《測量不確定度評定與表示》共同構(gòu)成支撐本規(guī)范的編寫參考JJG820-1993《手持糖量(含量)計及手持折射儀》、OIMLR124：1997（E）《測量葡萄汁糖含量折射儀（Refractometersforthemeasurementofthesugarcontentofgrapemust）》、OIMLR14(E)《全自動折射儀：驗證方法和手段(Automatedrefractometers:Methodsandmeansofverification)》等相關(guān)標(biāo)數(shù)字折射儀及含量計校準(zhǔn)規(guī)范本規(guī)范適用于折射率為（1.3～1.7）的數(shù)字折射儀OIMLR124：1997（E）測量葡萄汁糖含量折射儀（RefractometersforOIMLR142：2008（E）全自動折射儀：驗證方法和手段refractometers:Methodsandmeansofveri凡是注日期的引用文件，僅注日期的版本適用于本規(guī)范；凡是不注日期的OIMLR124：1997（E）界定的及以下術(shù)語光在真空中的傳播速度與光在介質(zhì)中的傳播速度之比。本規(guī)范所指的折射數(shù)字折射儀及含量計是利用折射、全反射臨含量的儀器。數(shù)字折射儀及含量計主要由光源、棱鏡、控制系統(tǒng)、顯示器等組成，部分?jǐn)?shù)字折射儀及含量計還），2室圖1數(shù)字折射儀及含量計結(jié)構(gòu)圖數(shù)字折射儀及含量計(以下簡稱儀器)的計量特性見表1。顯示單元分辨力校準(zhǔn)項目溫度示值誤差注：以上所有指標(biāo)不用于合格性判定，僅供參考。注：對于不具備控溫功能的儀器，要求環(huán)境溫度為(20±2)℃。JJF（浙）1207-20243優(yōu)先采用經(jīng)國家計量行政部門批準(zhǔn)的折射率溶液標(biāo)準(zhǔn)物質(zhì)、蔗糖水溶液標(biāo)準(zhǔn)物質(zhì)。折射率溶液標(biāo)準(zhǔn)物質(zhì)測量范圍（nD）為（1.3330～1.6580），擴展不確定度U=0.0002（k=2）；蔗糖水溶液標(biāo)準(zhǔn)物質(zhì)測量范圍為（0～50）%，擴展標(biāo)準(zhǔn)物質(zhì)也可按照附錄D方法進行制備和定值，蔗糖水溶液的折射率值參1）V棱鏡折射儀，液體折射率測量范圍（nD）：1.30000～1.70000，最大儀器開機預(yù)熱就緒后，應(yīng)先按照儀器說明書以（調(diào)節(jié)零點）。對于不具備控溫功能的儀器，儀器與注：每次測量之間應(yīng)使用無水乙醇等進行清潔，再用脫脂棉或者吸濕紙擦干。在儀器測量室中加入測量所需體積的純水，將數(shù)字溫度ΔTTTS（1）4T設(shè)置儀器測量室溫度為20℃,在儀器測量范圍內(nèi)均勻選取不準(zhǔn)點，從低濃度點到高濃度點的順序進行測量。在儀器測量室中加入相應(yīng)的折射率標(biāo)準(zhǔn)溶液，待儀器示值穩(wěn)定后，讀取儀器的示值，每個校準(zhǔn)點重復(fù)測量3次，取算術(shù)平均值，按公式（2）計算示值誤差Z。ZZZ0（2）Z——數(shù)字折射儀的示值誤差； Z0——標(biāo)準(zhǔn)溶液標(biāo)準(zhǔn)值。使用自行配制的標(biāo)準(zhǔn)溶液，參照7.3.1.1進行測量，在示值誤差測量的同時，還需記錄被測儀器顯示的溫度t，按附錄G的方法計算折射率修正值kZ，ZZkZZ0（3）kZ——折射率在t℃時修正值；ZkZ——儀器3次修正后的測量值的平均值。設(shè)置儀器測量室溫度為20℃,在儀器測量范圍內(nèi)均勻選取不5準(zhǔn)點，從低濃度點到高濃度點的順序進行測量。在儀器測量室中加入相應(yīng)的蔗DDD0（4） D0——標(biāo)準(zhǔn)溶液標(biāo)準(zhǔn)值，%。參照7.3.2.1進行測量，在示值誤差測量的同時，還需記錄被測儀器顯示的溫度t，根據(jù)溫度t查附錄E，得到糖含量修正值kD，按公式（5）計算示值DDkDD0（5）kD——糖含量在t℃時修正值，%；選擇儀器量程中間點附近的標(biāo)準(zhǔn)溶液，對儀器進行sn2xn2xxin1 xi——儀器第i次測量值； JJF（浙）1207-20246）；），g)進行校準(zhǔn)的日期，如果與校準(zhǔn)結(jié)果的有效性和應(yīng)用有關(guān)時，應(yīng)說明被校h)如果與校準(zhǔn)結(jié)果的有效性應(yīng)用有關(guān)時，應(yīng)對被校樣品的抽樣程序進行說建議復(fù)校時間間隔為1年。送校單位也可根據(jù)實際使用情況自主決定復(fù)校JJF（浙）1207-20247：％校準(zhǔn)所用主要計量標(biāo)準(zhǔn)器名稱測量范圍不確定度/準(zhǔn)確度等級/最大允許誤差檢定/校準(zhǔn)單位及證書號有效日期校準(zhǔn)點(℃)項目測量值(℃)測量平均值(℃)示值誤差(℃)123標(biāo)準(zhǔn)示值儀器示值標(biāo)準(zhǔn)示值儀器示值標(biāo)準(zhǔn)示值儀器示值2、儀器示值誤差:標(biāo)準(zhǔn)值測量值無溫度控制功能填寫測量平均值示值誤差不確定度U(k=2)溫度t(℃)t℃時修正值JJF（浙）1207-20248標(biāo)準(zhǔn)值測量值無溫度控制功能填寫測量平均值（%）示值誤差不確定度U(k=2)溫度t(℃)t℃時修正值（%）校準(zhǔn)點測量值重復(fù)性123456JJF（浙）1207-20249校準(zhǔn)點(℃)標(biāo)準(zhǔn)示值(℃)儀器示值(℃)溫度示值誤差(℃)標(biāo)準(zhǔn)值測量平均值示值誤差不確定度U（k=2）JJF（浙）1207-2024儀器開機調(diào)整就緒后，分別滴入相應(yīng)的折射率ZZZ0（C.1）式中：Z——數(shù)字折射儀的示值誤差； Z0——標(biāo)準(zhǔn)溶液標(biāo)準(zhǔn)值。方差：u(Z)cu2(Z)cu2(Z0) C.1.3.1輸入量Z的標(biāo)準(zhǔn)不確定度u(Z)來源于測量重復(fù)性引入的標(biāo)準(zhǔn)不確定度分量u1(Z)和儀器分辨力引入的標(biāo)準(zhǔn)不確定度分量u2(Z)；C.1.3.2輸入量Z0的標(biāo)準(zhǔn)不確定度u(Z0)來源于標(biāo)準(zhǔn)溶液定值引入的標(biāo)準(zhǔn)不確定度分量u1(Z0)和定值溫度影響引入的標(biāo)準(zhǔn)不確定度分量u2(Z0)。 C.1.4.1輸入量Z標(biāo)準(zhǔn)不確定度u(Z)評定 C.1.4.1.1測量重復(fù)性引入的標(biāo)準(zhǔn)不確定度分量u1(Z)1.34813、1.34812、1.34813、1.34815、1.34813、1.34816、1.34814、JJF（浙）1207-20242xix2s0.000012實際測量時，取3次測量的算術(shù)平均值作為測量結(jié)果，n3，則標(biāo)準(zhǔn)不確n(Z)s0.000007n C.1.4.1.2儀器分辨力引入的標(biāo)準(zhǔn)不確定度分量u2(Z)取k，則標(biāo)準(zhǔn)不確定度為：u2(Z)0.000003由于重復(fù)性不確定度分量包含儀器分辨力引入的不確定度分量，為避免重復(fù)計算，僅取兩者中較大的影響量，舍棄u2(Z)，則標(biāo)準(zhǔn)不確定度為：u(Z)0.000007C.1.4.2輸入量Z0標(biāo)準(zhǔn)不確定度u(Z0)評定C.1.4.2.1標(biāo)準(zhǔn)溶液定值引入的標(biāo)準(zhǔn)不確定度分量u1(Z0)標(biāo)準(zhǔn)溶液采用V棱鏡折射儀定值，V棱鏡折射儀允許誤差為±0.00005，其半寬度a=0.00005，服從均勻分布，取k，則標(biāo)準(zhǔn)不確(Z0)0.000029C.1.4.2.2定值溫度影響引入的標(biāo)準(zhǔn)不確定度分量u2(Z0)折射儀定值要求溫度控制在（20±0.3表以及蔗糖質(zhì)量分?jǐn)?shù)折射率對照表等相關(guān)資料，估得其半寬度a≈0.000031，服從均勻分布，取k，則標(biāo)準(zhǔn)不確定度為：JJF（浙）1207-2024u2(Z0)0.000018C.1.4.2.3標(biāo)準(zhǔn)不確定度u(Z0)的計算u(Z0) u(Z0)u(Z0)0.000034標(biāo)準(zhǔn)不確定度u(xi)不確定度來源標(biāo)準(zhǔn)不確定度靈敏系數(shù)cxi u(Z)測量重復(fù)性0.00000710.000007u(Z0)標(biāo)準(zhǔn)溶液0.000034-10.000034uc(Z)cu2(Z)cu2(Z0)0.000035Ukuc(Z)0.00007JJF（浙）1207-2024儀器開機調(diào)整就緒后，分別滴入相應(yīng)的糖含量D——數(shù)字含量計的示值誤差，%； 方差：u(Di)cu220）C.2.3.1輸入量D的標(biāo)準(zhǔn)不確定度u（D）度分量u12定度分量u1 10.19%、10.21%、10.22%、10.18%、10.22%、10.23%、10.21%、10.23%、JJF（浙）1207-20242xix2s0.0166%實際測量時，取3次測量的算術(shù)平均值作為測量結(jié)果，n3，則標(biāo)準(zhǔn)不確 數(shù)字含量計的分辨力為：0.01%，其半寬度a=0.005%，服從均勻分布，取u2由于重復(fù)性不確定度分量包含儀器分辨力引入的不確定度分量，為避免重 標(biāo)準(zhǔn)溶液采用V棱鏡折射儀定值，V棱鏡折射儀允許誤差為±0.00005，根據(jù)蔗糖質(zhì)量分?jǐn)?shù)折射率對照表，換算其半寬度a≈0.032%，服從均勻分布，取k，則標(biāo)準(zhǔn)不確定度：0）=0.018%折射儀定值要求溫度控制在（20±0.3表以及蔗糖質(zhì)量分?jǐn)?shù)折射率對照表等相關(guān)資料，估得其半寬度a≈0.021%，服從均勻分布，取k，則標(biāo)準(zhǔn)不確定度：u20）=0.012%JJF（浙）1207-20240）+u22標(biāo)準(zhǔn)不確定度u(xi)不確定度來源標(biāo)準(zhǔn)不確定度靈敏系數(shù)cxi測量重復(fù)性0.0096%10.0096%標(biāo)準(zhǔn)溶液0.022%-10.022%uc(D)cu2(D)cu2(D0)0.024%Ukuc(D)0.05%JJF（浙）1207-2024配制標(biāo)準(zhǔn)溶液選取蔗糖（純度99.9%及以上），在（100～110）℃下烘干2h，移入干燥器中冷卻至環(huán)境溫度。根據(jù)需要配制的糖液含量，用電子天平分別稱取糖的質(zhì)量Ws及水的質(zhì)量Wa。用電子天平稱空瓶質(zhì)量W0，逐步移入蔗糖至瓶中，稱量至W1=W0+Ws,逐漸加純水至瓶中，稱量至W2=W0+Ws+Wa,使其 配制后的溶液采用V棱鏡折射儀定值，折射儀溫度控制在（20±0.3）℃范表E.1蔗糖質(zhì)量分?jǐn)?shù)折射率對照表(20.0℃)01.3329861.3331291.3332721.3334151.3335581.3337021.33381.3344201.3345641.3347081.3348521.3349961.3351411.335221.3358641.3360091.3361541.3363001.3364451.3365901.336731.3373201.3374661.3376121.3377581.3379051.3380511.338141.3387861.3389331.3390811.3392281.3393761.3395241.339651.3402641.3404121.3405611.3407091.3408581.3410071.341161.3417531.3419031.3420521.3422021.3423521.3425021.342671.3432531.3434041.3435551.3437061.3438571.3440081.344181.3447651.3449171.3450691.3452211.3453731.3455261.345691.3462891.3464421.3465951.3467481.3469021.3470551.34721.3478241.3479781.3481331.3482871.3484421.3485961.34871.3493711.3495271.3496821.3498381.3499931.3501491.35031.3509301.3510871.3512431.3514001.3515571.3517141.35181.3525011.3526591.3528171.3529751.3531331.3532911.35341.3540841.3542431.3544021.3545611.3547211.3548801.35501.3556791.3558401.3560001.3561601.3563211.3564821.35661.3572871.3574481.3576101.3577721.3579331.3580951.35821.3589071.3590701.3592321.3593951.3595581.3597221.35981.3605391.3607031.3608671.3610321.3611961.3613601.36151.3621851.3623501.3625151.3626811.3628461.3630121.36311.3638421.3640091.3641761.3643421.3645091.3646761.36481.3655131.3656811.3658491.3660171.3661851.3663541.36651.3671971.3673661.3675351.3677051.3678741.3680441.36821.3688941.3690641.3692351.3694061.3695761.3697471.36991.3706041.3707761.3709481.3711201.3712921.3714641.37161.3723281.3725011.3726741.3728471.3730211.3731941.37331.3740651.3742391.3744141.3745881.3747631.3749381.37511.3758151.3759911.3761671.3763431.3765191.3766951.3768JJF（浙）1207-2024蔗糖g/100g0.20.30.40.70.81.3775791.3777561.3779341.3781111.3782891.3784671.3786441.3788221.3790011.3791791.3793571.3795361.3797151.3798931.3800721.3802511.3804311.3806101.3807901.3809691.3811491.3813291.3815091.3816901.3818701.3820501.3822311.3824121.3825931.3827741.3829551.3831371.3833181.3835001.3836821.3838631.3840461.3842281.3844101.3845931.3847751.3849581.3851411.3853241.3855071.3856911.3858741.3860581.3862421.3864261.3866101.3867941.3869781.3871631.3873481.3875321.3877171.3879021.3880881.3882731.3884591.3886441.3888301.3890161.3892021.3893881.3895751.3897611.3899481.3901351.3903221.3905091.3906961.3908841.3910711.3912591.3914471.3916351.3918231.3920111.3922001.3923881.3925771.3927661.3929551.3931441.3933341.3935231.3937131.3939031.3940921.3942831.3944731.3946631.3948541.3950441.3952351.3954261.3956171.3958091.3960001.3961921.3963831.3965751.3967671.3969591.3971521.3973441.3975371.3977301.3979221.3981161.3983091.3985021.3986961.3988891.3990831.3992771.3994711.399666401.3998601.4000551.4002491.4004441.4006391.4008341.4010301.4012251.4014211.401617411.4018131.4020091.4022051.4024011.4025981.4027951.4029921.4031891.4033861.403583421.4037811.4039781.4041761.4043741.4045721.4047701.4049691.4051671.4053661.405565431.4057641.4059631.4061631.4063621.4065621.4067621.4069611.4071621.4073621.407562441.4077631.4079641.4081651.4083661.4085671.4087681.4089701.4091711.4093731.409575451.4097771.4099801.4101821.4103851.4105881.4107901.4109941.4111971.4114001.411604461.4118081.4120111.4122151.4124201.4126241.4128281.4130331.4132381.4134431.413648471.4138531.4140591.4142651.4144701.4146761.4148821.4150891.4152951.4155021.415708481.4159151.4161221.4163301.4165371.4167441.4169521.4171601.4173681.4175761.417785491.4179931.4182021.4184111.4186201.4188291.4190381.4192471.4194571.4196671.4198771.4200871.4202971.4205081.4207181.4209291.4211401.4213511.4215621.4217741.4219851.4221971.4224091.4226211.4228331.4230461.4232581.4234711.4236841.4238971.4241101.4243231.4245371.4247501.4249641.4251781.4253931.4256071.4258211.4260361.4262511.4264661.4266811.4268961.4271121.4273281.4275431.4277591.4279751.4281921.4284081.4286251.4288421.4290591.4292761.4294931.4297111.4299281.4301461.4303641.4305821.4308001.4310191.4312381.4314561.4316751.4318941.4321141.4323331.4325531.4327731.4329931.4332131.4334331.4336531.4338741.4340951.4343161.4345371.4347581.4349801.4352011.4354231.4356451.4358671.4360891.4363121.4365351.4367571.4369801.437203JJF（浙）1207-2024蔗糖g/100g0.00.40.60.70.80.91.4374271.4376501.4378741.4380981.4383221.4385461.4387701.4389941.4392191.4394441.4396691.4398941.4401191.4403451.4405711.4407961.4410221.4412481.4414751.441701601.4419281.4421551.4423821.4426091.4428361.4430641.4432921.4435191.4437471.443976611.4442041.4444321.4446611.4448901.4451191.4453481.4455781.4458071.4460371.446267621.4464971.4467271.4469571.4471881.4474191.4476501.4478811.4481121.4483431.448575631.4488071.4490391.4492711.4495031.4497361.4499681.4502011.4504341.4506671.450900641.4511341.4513671.4516011.4518351.4520691.4523041.4525381.4527731.4530081.453243651.4534781.4537131,4539491.4541841.4544201.4546561.4548931.4551291.4553651.455602661.4558391.4560761.4563131.4565511.4567881.4570261.4572641.4575021.4577401.457979671.4582171.4584561.4586951.4589341.4591741.4594131.4596531.4598931.4601331.460373681.4606131.4608541.4610941.4613351.4615761.4618171.4620591.4623001.4625421.462784691.4630261.4632681.4635111.4637531.4639961.4642391.4644821.4647251.4649691.4652121.4654561.4657001.4659441.4661881.4664331.4666781.4669221.4671671.4674131.4676581.4679031.4681491.4683951.4686411.4688871.4691341.4693801.4696271.4698741.4701211.4703681.4706161.4708631.4711111.4713591.4716071.4718551.4721041.4723521.4726011.4728501.4730991.4733491.4735981.4738481.4740981.4743481.4745981.4748481.4750991.4753491.4756001.4758511.4761031.4763541.4766061.4768571.4771091.4773611.4776141.4778661.4781191.4783711.4786241.4788771.4791311.4793841.4796381.4798921.4801461.4804001.4806541.4809091.4811631.4814181.4816731.4819291.4821841.4824391.4826951.4829511.4832071.4834631.4837201.4839761.4842331.4844901.4847471.4850051.4852621.4855201.4857771.4860351.4862931.4865521.4868101.4870691.4873281.4875871.4878461.4881051.4883651.4886251.4888841.4891441.4894051.4896651.4899261.4901861.490447801.4907081.4909701.4912311.4914931.4917541.4920161.4922781.4925411.4928031.493066811.4933281.4935911.4938551.4941181.4943811.4946451.4949091.4951731.4954371.495701821.4959661.4962301.4964951.4967601.4970251.4972911.4975561.4978221.4980881.498354831.4986201.4988871.4991531.4994201.4996871.4999541.5002211.5004881.5007561.501024841.5012921.5015601.5018281.5020961.5023651.5026341.5029031.5031721.5034411.503711851.503980注：本表來源于OIMLR142：2008（E）全自動折射儀：驗證方法和手段(AMethodsandmeansofverificaJJF（浙）1207-2024表F.1蔗糖水溶液溫度修正表/℃質(zhì)量分?jǐn)?shù)/%/℃050.530.560.590.620.650.670.690.710.720.730.740.750.750.750.750.750.740.730.490.520.540.570.590.610.630.640.650.660.670.680.680.680.680.670.670.660.440.470.490.510.530.550.560.570.580.590.600.600.610.610.600.600.600.590.400.410.430.450.470.480.500.510.520.520.530.530.530.530.530.530.520.520.340.360.380.390.400.420.430.440.440.450.450.460.460.460.460.450.450.440.290.310.320.330.340.350.360.370.370.380.380.380.380.380.380.380.370.370.240.250.260.270.280.280.290.300.300.300.310.310.310