数字式三用表校准仪计量校准

直流电压                                (1～200)mV                    Urel=0.005% 

                                            200mV～20V                   Urel=0.007%

                                            20V～1000V                    Urel=0.009%
交流电压              JJG(电子)    (1～200)mV50Hz～1kHz     Urel=0.007% 
                0409   02003-1988   200mV～20V50Hz～1kHz   Urel=0.009% 
                         DO30-C型数  20V～1000V 50Hz～1kHz   Urel=0.012%
直流电流            字式三用表校  (0.2～2)mA                     Urel=0.006% 
                        验仪试行检定  2mA～20mA                    Urel=0.009% 

                        规程              20mA～200mA                 Urel=0.009% 

                                            200mA～2A                     Urel=0.010% 

                                            2A～20A                         Urel=0.012% 
交流电流                               (0.2～2)mA50Hz～1kHz      Urel=0.009% 

                                           2mA～20mA50Hz～1kHz     Urel=0.011% 

                                           20mA～200mA50Hz～1kHz  Urel=0.014% 

                                           200mA～2A50Hz～1kHz      Urel=0.016% 
电阻                                     0～2Ω                              Urel=0.012% 
                                           2Ω～20Ω                          Urel=0.009% 

                                           20Ω～200kΩ                     Urel=0.016% 
                                           200kΩ～2MΩ                    Urel=0.022% 
                                           2MΩ～20MΩ                     Urel=0.020% 
                                           20MΩ～200MΩ                  Urel=0.024%