详情描述

DO30-3Type AMulti-functional Calibration Instrument、Triple-meter Calibration Instrument、Universal Multimeter Calibration Device
I. Purpose and Features:
DO30-3Type AMulti-functional Calibration InstrumentThis is an intelligent AC and DC standard voltage and current calibration instrument (with AC output displaying true RMS value). The instrument features three display windows, capable of simultaneously showing the actual output value, percentage, and the full-scale value of the meter under test. The output of the instrument can be set based on the full-scale value of the meter under test.RangeAnd the stepping value can be selected according to the scale of the inspected gauge. Output adjustment is selectable.KeyboardPush-button or potentiometer control. With digital display, error direct reading,RangeWide range, fine gradation, high precision, good stability, and easy to use. Suitable for calibration, inspection, and maintenance of 3.5-digit multi-meters, various 0.2 and 0.5 class pointer-type AC and DC voltage and current meters; also can be used as a high-stability test power supply, paired with high-grade standard meters to calibrate 0.1 class current and voltage meters.
II. Main Functions:
1 、   5  1/2LED digital display output quantity, showing both actual value and percentage simultaneously.
2. UtilizeKeyboardControl the increase and decrease of output volume.KeyboardControl levels are divided into 100%/N, 10%/N, 1%/N, 0.1%/N (N being 4, 5, 6, 10, 15).
3 、External Control RegulatorThe regulator allows for off-machine control of output quantity adjustments.KeyboardTwo configurations available, switchable at will.
4. Output voltage range for AC and DC is 0 to 1050V.
5. Output range for AC and DC current is 0 to 20A.
6. Offers four output frequencies for communication: 50Hz, 60Hz (59.7Hz), 400Hz, and 1000Hz, utilizingCrystal OscillatorEnsure accuracy and stability in frequency.
7. Overload protection with automatic shutdown and manual reset.
8. The 50Hz output can also be synchronized with the local power supply to minimize the impact of beat frequency on the meter under test.
9. Clamp Meters Measurement: Equipped with our factory-standard coil, capable of measuring 0-1000A current with an accuracy of ±0.3%.
Section 4: Technical Performance
1. Stability: AC < fullRange0.02%/5 minutes
DC < FullRange0.01%/5 minutes
The instrument requires a two-hour warm-up for precise measurements.
2. Communication Distortion: <0.5%
3. Direct Current Ripple Factor: <0.05% (at rated output)
4. Output Frequency Accuracy: 50Hz, 60Hz (59.7Hz), 400Hz, <0.1% (or synchronized with mains power)
5. Output voltage and currentMedian ResistanceScope and accuracy are as shown in (Appendix 1)      (23℃±2℃, output value greater than 10%)Range）

Export ItemsOutput RangeRated OutputPeak Output
Accuracy
AC/DC Voltage0～300mV20mA100mA

Basic Error:
DC: ±(0.02% reading + 0.03% range)
AC: ±(0.02% Reading + 0.03% Range)
Voltage below 100mV and current below 2mA are not assessed for accuracy.
1 kHz additional error ±0.05% reading
Voltage Additional Error:
±0.02mV

0～1V～3V50mA100mA
0～5V～10V～30V100mA200mA
0～50V～100V～300V50mA100mA
0～250V～500V～1000VDC:20mA
AC:40mA		DC:20mA
AC:60mA
AC/DC current0～100mA
DC:3V
AC:36V
0～1A
DC:3V
AC:12V
0～20A
1.5V
Standard Resistor10, 24, 50, 100, 240, 500 (Ω), 1, 2.4, 5, 10, 24 (kΩ), plus × 1K, × 1X range (10kΩ to 24MΩ)0.25W
±(0.2%+20mΩ)

Note: (1) When the working environment temperature exceeds 23℃ ±2℃, for every 10℃ change, the additional error is less than the basic error of this range.
(2) 50A 1KHz accuracy ±(0.15% of reading value + 0.05% of full scale)

Appendix (1)
6. Power specifications: AC voltage 220V ± 10%, frequency 50Hz ± 1Hz
7. Working Environment: Temperature 5℃ to 35℃, relative humidity <80%
8. Business Hours: Continuous
9. Dimensions: 180×480×480mm3
10. Weight: Approximately 24 kg
 


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