NAGKT-I electrical instrument test-bed
Also called name
Digital high-precision electrical instrument test bench, high-precision electrical instrument test bench, electrical instrument test bench, digital electrical instrument test bench, digital multimeter calibrator, three-phase instrument test bench calibrator
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.