南澳电气NAGKT-I数字式高精度电气仪表试验台NAGKT-Ielectricalinstrumenttestbed一：南澳电气NAGKT-I数字式高精度电气仪表试验台概述NAGKT-I型数字式高精度电气仪表校验试验台（也叫做：数字式多用表校验仪、三表校验仪）是一种LED五位数字式交、直流标准电压、电流发生器，用于校验数字式电表、各种指针式电表及直流0.2级，交流0.5级以下各类表头。本仪器电压输出五档（0~1000V）；电流输出六档（0~10A）；可以选配：中值电阻2×11档(0Ω~24MΩ)；交流频率50Hz,60Hz,400Hz（数字合成，按键选择）。以上项目及量程变换均通过内部开关转换。采用***新的16位A/D转换芯片，转换速度和精度得到了大幅度提高；AC/DC采用真有效值转换芯片，保证了交流输出的精度；整机线性度好。采用了新型的复合大功率放大器，输出功率强大，可靠性高，失真度小。输出调节采用进口电位器，寿命长，调节细度高。整机采用“闭环控制”，输出稳定度高。电压短路、电流开路自动保护，完全符合新三表鉴定规程。二、南澳电气NAGKT-I数字式高精度电气仪表试验台工作原理：本仪器有数字合成正弦波发生器单元、功放单元、电源及保护单元、量程单元、A/D单元、显示单元、键盘单元及标准电阻器等组成。三、南澳电气NAGKT-I数字式高精度电气仪表试验台技术性能：2.1性能参数：项目量程输出范围分辨率***大输出精度（23℃&plu***n;2℃）直流500mV0~550.00mV0.01mV100mA&plu***n;（读数值×0.05%+满量程值×0.01%）5V0~5.5000V0.1mV100mA电50V0~55.000V1mV100mA压500V0~550.00V10mV20mA1KV0~1050.0V100mV10mA直流电流500uA0~550.00uA0.01uA2V&plu***n;（读数值×0.1%+满量程值×0.02%）5mA0~5.5000mA0.1uA2V50mA0~55.000mA1uA2V500mA0~550.00mA10uA2V5A0~5.5000A100uA1.5V&plu***n;（读数值×0.1%+满量程值×0.04%）10A0~11.000A1mA1.5V交流电压500mV0~550.00mV0.01mV100mA&plu***n;（读数值×0.1%+满量程值×0.05%）ACI1mA以下不考核5V0~5.5000V0.1mV100mA50V0~55.000V1mV100mA500V0~550.00V10mV20mA1KV0~1050.0V100mV10mA交流电流500uA5mA0~5.5000mA0.1uA2V50mA0~55.000mA1uA2V500mA0~550.00mA10uA2V5A0~5.5000A100uA1.5V&plu***n;（读数值×0.1%+满量程值×0.01%）10A0~11.000A1mA1.5V中值电阻示值功率精度10Ω、24Ω、50Ω、100Ω、240Ω500Ω、1kΩ、2.4kΩ、5kΩ10kΩ、24kΩ、10kΩ、24kΩ50kΩ、100kΩ、240kΩ、500kΩ、1MΩ、2.4MΩ5MΩ、10MΩ、24MΩ0.25W&plu***n;（显示值×0.1%+10mΩ）2.2：交流失真度：不大于1%。2.3：直流纹波系数：不大于0.5%；电流10A不大于3%。2.4：稳定性：仪器预热一小时后，1分钟内输出漂移应小于基本量程满度的&plu***n;0.05%，作精密测量时需预热2小时。2.5：外型尺寸：480×340×134（mm）。2.6：重量：10Kg。NAGKT-Ielectricalinstrumenttest-bedI.OverviewNAGKT-Idigitalelectricalinstrumentcalibrationtestbench(alsocalled:digitalmultimetercalibrator,three-tablecalibrator)isafive-digitLEDAC,DCstandardvoltage,currentgeneratorforCalibrationdigitalmeters,avarietyofhands-meterandDC0.2,theexchangeof0.5belowthevarioustypesoftablehead.(0~12MΩ);ACfrequencyof50Hz,60Hz,400Hz(digitalsynthesis,theoutputvoltageofthethree-phasevoltagerangeof0~Buttontoselect).Theaboveitemsandrangeconversionareconvertedbyinternalswitches.Usingthelatest16-bitA/Dconverterchip,conversionspeedandaccuracyhasbeengreatlyimproved;AC/DCconverterwithtrueRMSvaluetoensuretheaccuracyofACoutput;linearityisgood.Usinganewtypeofcompositehigh-poweramplifier,theoutputpowerofstrong,highreliability,lowdistortion.Outputadjustmentusingimportedpotentiometer,longlife,highfinenessregulation.Themachineadopts"closed-loopcontrol",theoutputstabilityishigh.Voltageshort-circuit,opencurrentautomaticprotection,infullcompliancewiththenewthreetableidentificationprocedures.Second,theworkingprinciple:Theinstrumenthasadigitalsynthesissinew***egeneratorunit,poweramplifierunit,powerandprotectionunit,rangeunit,A/Dunit,displayunit,keyboardunitandstandardresistorsandothercomponents.Third,thetechnicalperformance:2.1Performanceparameters:ItemTestRangeOutputRangeResolutionMaxOutputAccuracy（23℃&plu***n;2℃）DCVoltage500mV0~550.00mV0.01mV100mA&plu***n;（读数值×0.05%+满量程值×0.01%）&plu***n;(Readingvalue×0.05%+fullscalevalue×0.01%)5V0~5.5000V0.1mV100mA50V0~55.000V1mV100mA500V0~550.00V10mV20mA1KV0~1050.0V100mV10mADCCurrent500uA0~550.00uA0.01uA2V&plu***n;（读数值×0.1%+满量程值×0.02%）&plu***n;(Readingvalue×0.1%+fullscalevalue×0.02%)5mA0~5.5000mA0.1uA2V50mA0~55.000mA1uA2V500mA0~550.00mA10uA2V5A0~5.5000A100uA1.5V&plu***n;（读数值×0.1%+满量程值×0.04%）&plu***n;(Readingvalue×0.1%+fullscalevalue×0.04%)10A0~11.000A1mA1.5VACVoltage500mV0~550.00mV0.01mV100mA&plu***n;（读数值×0.1%+满量程值×0.05%）&plu***n;(Readingvalue×0.1%+fullscalevalue×0.05%)ACI1mAnotincluded5V0~5.5000V0.1mV100mA50V0~55.000V1mV100mA500V0~550.00V10mV20mA1KV0~1050.0V100mV10mAACCurrent500uA5mA0~5.5000mA0.1uA2V50mA0~55.000mA1uA2V500mA0~550.00mA10uA2V5A0~5.5000A100uA1.5V&plu***n;（读数值×0.1%+满量程值×0.01%）&plu***n;(Readingvalue×0.1%+fullscalevalue×0.01%)10A0~11.000A1mA1.5VMiddleDataResistaceDisplayDataPowerAccuracy10Ω、24Ω、50Ω、100Ω、240Ω500Ω、1kΩ、2.4kΩ、5kΩ10kΩ、24kΩ、10kΩ、24kΩ50kΩ、100kΩ、240kΩ、500kΩ、1MΩ、2.4MΩ5MΩ、10MΩ、24MΩ0.25W&plu***n;（显示值×0.1%+10mΩ）&plu***n;（Readingvalue×0.1%+10mΩ）2.2:ACdistortion:lessthan1%.2.3:DCripplefactor:notmorethan0.5%;current10Anotmorethan3%.2.4:Stability:theinstrumentwarm-upafteronehour,1minuteoutputdriftshouldbelessthanthefullrangeofthebasicrangeof&plu***n;0.05%,forprecisionmeasurementsneedtowarmup2hours.2.5:Overalldimensi***:480×340×134(mm).2.6:Weight:10Kg.)