南澳电气公司专业生产NAGKT-I电气仪表试验台

 NAGKT-I电气仪表试验台    NACKT-I electrical instrument test bed

一：概述

NAGKT-I型数字式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

 

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

电

50V

0~55.000V

1mV

压

500V

0~550.00V

10mV

20mA

 

1KV

0~1050.0V

100mV

10mA

 

直

电

500uA

0~550.00uA

0.01uA

2V

±（读数值×0.1%+满量程值×0.02%）

5mA

0~5.5000mA

0.1uA

50mA

0~55.000mA

1uA

500mA

0~550.00mA

10uA

5A

0~5.5000A

100uA

1.5V

±（读数值×0.1%+满量程值×0.04%）

10A

0~11.000A

1mA

交

压

500mV

 

±（读数值×0.1%+满量程值×0.05%）

AC I 1mA以下不考核

5V

50V

500V

1KV

交

 

 

 

5mA

50mA

500mA

5A

±（读数值×0.1%+满量程值×0.01%）

10A

0~11.000A

1mA

中

值

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。

NACKT-I electrical instrument test-bed

I. 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

±（读数值×0.05%+满量程值×0.01%）

±(Reading value × 0.05% + full scale value × 0.01%)

5V

0~5.5000V

0.1mV

 

50V

0~55.000V

1mV

500V

0~550.00V

10mV

20mA

 

1KV

0~1050.0V

100mV

10mA

 

DC Current

500uA

0~550.00uA

0.01uA

2V

±（读数值×0.1%+满量程值×0.02%）

±(Reading value × 0.1% + full scale value × 0.02%)

5mA

0~5.5000mA

0.1uA

50mA

0~55.000mA

1uA

500mA

0~550.00mA

10uA

5A

0~5.5000A

100uA

1.5V

±（读数值×0.1%+满量程值×0.04%）

±(Reading value × 0.1% + full scale value × 0.04%)

10A

0~11.000A

1mA

AC Voltage

500mV

±（读数值×0.1%+满量程值×0.05%）

±(Reading value × 0.1% + full scale value × 0.05%)

AC I 1mA not included

5V

50V

500V

1KV

AC Current

 

 

 

5mA

50mA

500mA

5A

±（读数值×0.1%+满量程值×0.01%）

±(Reading value × 0.1% + full scale value × 0.01%)

10A

0~11.000A

1mA

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

±（显示值×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.