JW-0308A Fixed Point AC/DC Voltage Source

The device is a single-phase 0.05 AC-DC standard source designed in accordance with JJG124-2005 Verification Regulation of Ammeters, Voltmeters, Wattmeters and Ohmmeters and the relevant national standards.
The signal part of source adopts sine wave signal source and distortional wave signal source constituted by DSP and 16-digit high-speed D/A converter and which is controlled by program.
Using a color touch screen, chart character display clear. Device has the advantages of high precision, stable and reliable work, convenient operation and flexible features such as.

Main Technique Specification

AC output
Comman fixed points：
19mV, 100mV, 190mV, 1V ,1.9V ,10V ,19V ,100V ,190V ,1000V
(can be changed）
Power of V output   Max.20VA；
Accuracy
A:2～1000V    ±(0.03%RD+0.02%RG)；
B:19～1999mV ±(0.3%RD+0.2%RG)；
Stability A:≤0.01% /60s； B:≤0.05% /60s；
Distortion factor   ≤0.3%；
DC output
Comman fixed points：
19mV, 100mV ,190mV ,1V ,1.9V ,10V ,19V ,100V ,190V ,1000V
(can be changed）

Power of V output　 Max.20W；
Accuracy   ±(0.03%RD+0.02%RG)；
Stability ≤0.01%/60s；
Ripple voltage ≤1%.
Constant frequency output Frequency range
50Hz, 55Hz, 60Hz, 400 Hz；
Accuracy   0.01Hz.
Voltage supply
Single   220V±10%，50Hz±5%.
Operating environment
Ambient temperature 20℃±10℃，
Relative humidity    ≤85%RH.
Dimensions (W×H×D) (mm)
440×460×165mm³，
Weight (kg) about 10kg.

Main Functions & Features

1.Composed of a standard single-phase AC voltage source and a standard DC voltage source, the device is designed to output AC and DC voltage signals at fixed points. Moreover, the device is also featured with high accuracy, high stability, fast speed and testing convenience, etc. As for voltage values output at a fixed point, they may be arbitrarily configured by users.
2.Output is selected on a touch screen. In addition to outputting multi-point DC and AC voltage, it is capable of providing quantity transmission criteria for digital voltmeters and multimeters with 3 1/2 or 4 1/2 digit display.
3.The fixed-point scheme that has been made can be saved to the source; and up to 5 plans can be stored. At the time of power on, the previous plan can be automatically exported, making it available for users to select.
4. A key calibration function is provided. In details, output values of a standard source may be corrected based on indicating values of external standards without opening the cover.
5. It may be used to test digital multimeters, pointer multimeters and mounted digital meters at a grade of 0.2 and below, including digital meters with DC analog output.