YIHUA 303D DC Power Supply
Feature
303D communication maintenance power supply is a single line output of stabilized high accuracy
DC stabilized power supply. The output voltage and current can be adjusted continuously within the
rated range. The load current has MA conversion with two settings: 0-3A and 0-99 mA. Constant
voltage and constant current (CV/CC), automatic switching of working modes. Double digital display
shows output voltage and current independently. Several protection functions include current
limitation, voltage reduction, short circuit protection, over-temperature protection, etc. The design
is applied to production line of the plant, maintenance, laboratories and is also a necessary device
for the communication industry.
₨7,586 ₨10,529
Principle description of constant voltage/constant current CV/CC
The operation mode of constant voltage/constant current can be automatically switched depending
on the comparison result of the load current and limited current value.
- a) Constant voltage CV
When the existing current value is smaller than the set output limit current value, the power supply
is working under the constant voltage mode. The CV indicator light on the front panel is on, the
output voltage is controlled and it will be the same as the set value. Current changes with the load.
- b) Constant current mode (CC)
When the current value exceeds the limit value of the output current, the equipment will work in
the CC mode. The CC indicator light on the front panel is on, the output current value is controlled
to the set value. Since the limited output power cannot be overloaded, the output voltage can be
lower than the set value. When the output current is lower than the set value, the equipment will
automatically change to CC mode.
| Weight | 4 kg |
|---|---|
| Dimensions | 25 × 13 × 15 cm |
Machine parameters
| Parameters | |
| rated voltage | AC220V 50Hz |
| Power of complete machine | 140W |
| Operating environment | 0～40℃ relative humidity ＜80％ |
| Storage Temperature | －20～80℃ relative humidity ＜80％ |
| Dimensions of the machine body | 255*130*150mm |
| weight | 4.3KG |
| Performance parameters | |
| output voltage | Adjustable continuously within 0～30V |
| output current | Adjustable continuously within 0～3A/0-99mA
(current limitation adjustment when above 0.2A) |
| output power | 90W |
| Source effect | 1mV |
| load effect | ≤0.33% |
| Ripple noise | ≤3mVrms（5Hz ~ 1MHz）/≤3mArms |
| Display accuracy | 0.1V/0.1A/1mA |
| Protection mode | Over current, short circuit, over temperature protection |
| Dissipation mode | air cooling |
Brand
YIHUA
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Oscilloscopes
UNI-T MSO3254E 250MHz Mixed Signal 4 Channel Digital Oscilloscope
Analog bandwidth 150MHz 250MHz Channels 2+16 digital 4+16 digital 2+16 digital 4+ 16digital Sampling rate (Analog) 2.5GS/s (Single channel), 1.25GS/s (Dual channels) Sampling rate (Digital) 1.25GS/s (Eight channels), 625MS/s(Sixteen channels) Memory depth 70Mpts Waveform capture rate 200,000wfms/s Time base scale 2ns/div~50s/div (Real-time sampling rate, memory depth display ) Time base scale (digital) 2ns/div~40S/div[Step by 1-2-4 stall] Input impedance (1MΩ±1%) II (20pF±3pF) Input impedance digital (101kΩ±1%) II (9pF±1pF) Vertical scale 1mV/div~20 V/div (1 MΩ) DC gain accuracy <5mV: ±3%, ≥5mV: ±2% Waveform record 100,000 frames Trigger types Edge, Runt, Window, Nth Edge, Delay, Overtime, Duration, Setup/Hold, Pulse Width, Slop, Video, Code; RS232/UART, I2C, SPI, USB,
CAN, LIN, FlexRayBus decode RS232/UART, I2C, SPI, USB, CAN, LIN, FlexRay Waveform operations A+B, A-B, A×B, A/B, FFT, editable advanced and logical operations Auto measurements
Max, Min, High, Low, Ampl, Pk-Pk, Middle, Mean, CycMean, RMS, CycRMS, Period, Freq, Rise, Fall, RiseDelay, FallDelay, +Width,
-Width, FRR, FRF, FFR, FFF, LRF, LRR, LFR, LFF, +Duty, -Duty, Area, CycArea, OverSht, PreSht, Phase, 34 parameters in totaldigital
channel: Freq, Period, +Width, -Width, +Duty, -Duty, RiseDelay A→B,FallDelay A→B, Phase A→B, Phase B→AMeasurement display 5 types Measurement statistics Average, Max, Min, standard deviation and number of measurements Frequency counter 6 bits Standard interfaces USB Host, USB Device, LAN, EXT Trig, AUX Out (Trig Out, Pass/Fail), AWG,UT-M15 logic analyzer probe, VGA Standard Accessories
USB interface cable UT-D14 Passive Probe x 2/4 (1 x , 10 x switchable,300MHz,) UT-P06 Passive Probe x 2/4 (1 x , 10 x switchable,200MHz,) UT-P05 16CH Logic analyzer probe UT-15M SKU: n/a
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Parameters
Rated voltage AC220V±10% 50Hz Power of complete machine 15W Operating environment 0～40℃ relative humidity＜80％ Storage temperature －20～80℃ relative humidity＜80％ Dimensions of the machine body 17*21*16.5cm Weight 1.61KG Performance parameters Output voltage Adjustable continuously within 0～15V Output current Adjustable continuously within 0～1A (current limitation adjustment when above 0.2A) Output power 15W Source effect ≤1mV Load effect ≤0.33% Ripple noise ≤3mVrms（5Hz ~ 1MHz）/≤3mArms Display accuracy 0.1V/0.1A/1mA Protection mode Over-current, short circuit, over-temperature protection SKU: n/a
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