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NAGKT-I数字式高精度电气仪表试验台 NAGKT-I electrical instrument test bed
数字式高精度电气仪表试验台，高精度电气仪表试验台，电气仪表试验台，数字式电气仪表试验台，数字式多用表校验仪，三相仪表校验台校验仪
一：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。采用最新的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、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、技术性能：
2.1性能参数：
|
项
目 |
量 程 |
输 出 范 围 |
分 辨 率 |
最 大 输 出 |
精 度（23℃±2℃） |
|
直 流 |
500mV |
0~550.00mV |
0.01mV |
100mA |
±（读数值×0.05%+满量程值×0.01%） |
|
5V |
0~5.5000V |
0.1mV |
100mA |
||
|
电 |
50V |
0~55.000V |
1mV |
100mA |
|
|
压 |
500V |
0~550.00V |
10mV |
20mA |
|
|
|
1KV |
0~1050.0V |
100mV |
10mA |
|
|
直 流 电 流 |
500uA |
0~550.00uA |
0.01uA |
2V |
±（读数值×0.1%+满量程值×0.02%）
|
|
5mA |
0~5.5000mA |
0.1uA |
2V |
||
|
50mA |
0~55.000mA |
1uA |
2V |
||
|
500mA |
0~550.00mA |
10uA |
2V |
||
|
5A |
0~5.5000A |
100uA |
1.5V |
±（读数值×0.1%+满量程值×0.04%） |
|
|
10A |
0~11.000A |
1mA |
1.5V |
||
|
交 流 电 压 |
500mV |
0~550.00mV |
0.01mV |
100mA |
±（读数值×0.1%+满量程值×0.05%）
AC I 1mA以下不考核
|
|
5V |
0~5.5000V |
0.1mV |
100mA |
||
|
50V |
0~55.000V |
1mV |
100mA |
||
|
500V |
0~550.00V |
10mV |
20mA |
||
|
1KV |
0~1050.0V |
100mV |
10mA |
||
|
交 流 电 流 |
500uA |
|
|
|
|
|
5mA |
0~5.5000mA |
0.1uA |
2V |
||
|
50mA |
0~55.000mA |
1uA |
2V |
||
|
500mA |
0~550.00mA |
10uA |
2V |
||
|
5A |
0~5.5000A |
100uA |
1.5V |
±（读数值×0.1%+满量程值×0.01%） |
|
|
10A |
0~11.000A |
1mA |
1.5V |
||
|
中
值
电
阻 |
示 值 |
功 率 |
精 度 |
||
|
10Ω、24Ω、50Ω、100Ω、240Ω 500Ω、1kΩ、2.4kΩ、5kΩ 10kΩ、24kΩ、10kΩ、24kΩ 50kΩ、100kΩ、240kΩ、500kΩ、1MΩ、2.4MΩ 5MΩ、10 MΩ、24 MΩ |
0.25W
|
±（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±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-I electrical instrument test-bed
First. Overview
NAGKT-I digital electrical instrument calibration test bench (also called: digital multimeter calibrator, three-table calibrator) is a five-digit LED AC, DC standard voltage, current generator for Calibration digital meters, a variety of hands-meter and DC 0.2, the exchange of 0.5 below the various types of table head. (0 ~ 12MΩ); AC frequency of 50Hz, 60Hz, 400Hz (digital synthesis, the output voltage of the three-phase voltage range of 0 ~ Button to select). The above items and range conversion are converted by internal switches. Using the latest 16-bit A / D converter chip, conversion speed and accuracy has been greatly improved; AC / DC converter with true RMS value to ensure the accuracy of AC output; linearity is good. Using a new type of composite high-power amplifier, the output power of strong, high reliability, low distortion. Output adjustment using imported potentiometer, long life, high fineness regulation. The machine adopts "closed-loop control", the output stability is high. Voltage short-circuit, open current automatic protection, in full compliance with the new three table identification procedures.
Second, the working principle:
The instrument has a digital synthesis sine wave generator unit, power amplifier unit, power and protection unit, range unit, A / D unit, display unit, keyboard unit and standard resistors and other components.
Third, the technical performance:
2.1 Performance parameters:
|
Item |
Test Range |
Output Range |
Resolution |
Max Output |
Accuracy（23℃±2℃） |
|
DC Voltage
|
500mV |
0~550.00mV |
0.01mV |
100mA |
±（Read value×0.05%+max data×0.01%） ±(Reading value × 0.05% + full scale value × 0.01%) |
|
5V |
0~5.5000V |
0.1mV |
100mA |
||
|
|
50V |
0~55.000V |
1mV |
100mA |
|
|
|
500V |
0~550.00V |
10mV |
20mA |
|
|
|
1KV |
0~1050.0V |
100mV |
10mA |
|
|
DC Current |
500uA |
0~550.00uA |
0.01uA |
2V |
±（Read value×0.1%+max data×0.02%） ±(Reading value × 0.1% + full scale value × 0.02%)
|
|
5mA |
0~5.5000mA |
0.1uA |
2V |
||
|
50mA |
0~55.000mA |
1uA |
2V |
||
|
500mA |
0~550.00mA |
10uA |
2V |
||
|
5A |
0~5.5000A |
100uA |
1.5V |
±（Read value×0.1%+max data×0.04%） ±(Reading value × 0.1% + full scale value × 0.04%) |
|
|
10A |
0~11.000A |
1mA |
1.5V |
||
|
AC Voltage |
500mV |
0~550.00mV |
0.01mV |
100mA |
±（Read value×0.1%+max data×0.05%） ±(Reading value × 0.1% + full scale value × 0.05%)
AC I 1mA not included
|
|
5V |
0~5.5000V |
0.1mV |
100mA |
||
|
50V |
0~55.000V |
1mV |
100mA |
||
|
500V |
0~550.00V |
10mV |
20mA |
||
|
1KV |
0~1050.0V |
100mV |
10mA |
||
|
AC Current |
500uA |
|
|
|
|
|
5mA |
0~5.5000mA |
0.1uA |
2V |
||
|
50mA |
0~55.000mA |
1uA |
2V |
||
|
500mA |
0~550.00mA |
10uA |
2V |
||
|
5A |
0~5.5000A |
100uA |
1.5V |
±（Read value×0.1%+max data×0.01%） ±(Reading value × 0.1% + full scale value × 0.01%) |
|
|
10A |
0~11.000A |
1mA |
1.5V |
||
|
Middle Data Resistace |
Display Data |
Power |
Accuracy |
||
|
10Ω、24Ω、50Ω、100Ω、240Ω 500Ω、1kΩ、2.4kΩ、5kΩ 10kΩ、24kΩ、10kΩ、24kΩ 50kΩ、100kΩ、240kΩ、500kΩ、1MΩ、2.4MΩ 5MΩ、10 MΩ、24 MΩ |
0.25W
|
±（Display data×0.1%+10mΩ） ±（Reading value×0.1%+10mΩ）
|
|||
2.2: AC distortion: less than 1%.
2.3: DC ripple factor: not more than 0.5%; current 10A not more than 3%.
2.4: Stability: the instrument warm-up after one hour, 1 minute output drift should be less than the full range of the basic range of ± 0.05%, for precision measurements need to warm up 2 hours.
2.5: Overall dimensions: 480 × 340 × 134 (mm).
2.6: Weight: 10Kg.
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