Constant current output：When the current value set by the power supply is less than the current value consumed by the load, the power supply is operating in constant current mode. Ithe setting current value＜Ithe load consuming current value

Constant voltage： When the current value set by the power supply is greater than the current value consumed by the load, the power supply is operating in constant voltage mode. Ithe setting current value＞Ithe load consuming current value

Display resolution refers to the minimum voltage, current digits displayed on the screen.

Programming resolution refers to the minimum settable voltage and current.

Readback resolution refers to the minimum voltage and current readback inside the machine.

Line regulation refers to the effect of the input voltage on the output voltage

Load regulation refers to the effect of load changes on the output voltage

PPM is the abbreviation for per million. It is used to describe temperature drift value of voltage reference. For voltage reference,  1ppm/℃ refers to the output voltage deviates from its nominal value by one millionth of a degree for every 1°C change in ambient temperature at a reference point (usually 25°C)

For example,  a voltafe reference has a nominal value 2.5V and TC is ±10ppm/°C,  when the ambient temperature changes by 1°C and 10°C for each change in the base of 25°C, its output voltage will become:

2.5V±10ppm/℃X1℃=2.5V±0.000025V

2.5V±10ppm/℃X10℃=2.5V±0.00025V

Resolution：For example, a ruler with a minimum scale of 1mm, namely, the size of the measurement of the smallest is 1mm and it can not measure the number smaller than 1mm. Thus 1mm is its minimum resolution.

Accuracy：If the value is 100mm and the measured value is 105mm, the radio of the difference is 0.05 (105-100)/100=0.05. Accuracy is the difference between the measurement result and the real value.

Precision: An object is known as 100mm nominal and was measured 5 times. The values are respectively 102,105,106,108,109. The difference between these data and the real 100mm are relatively small which indicating it has a good precision. 

If the generator still remains blank screen when power on.

1) Check whether the power supply is connected properly.

2) Check whether the power switch on the rear panel is set to "I".

3) Check whether the power switch on the front panel is connected .

4) Restart the instrument.

5) If the instrument still can't work normally, please contact your UNI-T dealer or local offices for support.

Correct settings but no waveform output

1) Check whether the BNC cable is properly connected to the channel output.

2) Check whether the key CH1 or CH2 is turned on.

3) Save the current settings of the instrument to a USB flash drive and "restore factory settings",  then restart the instrument.

4) If the instrument still can't work normally, please contact your UNI-T dealer or local offices for support.

1) Check whether the USB flash drive device is working properly.

2) Make sure you are using Flash type USB flash drive device, this instrument does not support hard disk type USB flash drive device.

3) Restart the instrument and insert the USB flash drive again to see if it works properly.

4) If the USB flash drive still can not be recognized, please contact UNI-T dealer or local office and let us serve you.

(1) General Maintenance 

Do not store or put the instrument under direct sunlight for a long time, especially the LCD display panel. Caution:  Sprays, liquids or solvents are not allowed for the instrument or probe  to avoid damage to the instrument or the probe. 

(2) Cleaning 

Check the instrument and probe frequently according to the operating conditions. Fellow the steps to clean the surfaces of the instrument.

Please use a soft cloth to wipe dust on the surface of the instrument and probe. When cleaning the LCD panel, be careful not to scratch the transparent protective film. 

Power off the instrument first and wipe the instrument with a soft cloth.Use a mild detergent or water to clean if necessary.

Do not use any abrasive chemical cleaners as they may damage the instrument or the probe. 

Warning: Make sure the instrument is completely dry before rebooting. Moisture may cause electrical short-circuit or even personal injury!