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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Model: ET825
Material: ABS
Power Supply: 3xAAA 1.5V Battery (Battery Not Included)
Application: It is suitable for electromagnetic radiation testing.
Monitoring Places: It can detect radiation in homes, offices, outdoors, and industrial places.
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Clamp Meters
CLAMP METER AC DC CM 2056
Technical data
Basic function
Range
Accuracy
DCV
400mV/4V/40V/400V/1000V
±(0.5%+5)
ACV
400mV/4V/40V/400V/750V
±(1.0%+5)
DCA
400A/1000A
±(2.0%+5)
ACA
400A/1000A
±(2.0%+5)
Resistance
400Ω/4kΩ/40kΩ/400kΩ/4MΩ/40MΩ
±(0.8%+3)
Capacitance
4nF/40nF/400nF/4uF/40uF/200uF
±(3.5%+8)
Frequency
100Hz/1kHz/10kHz/100kHz/1MHz/10MHz
±(0.5%+4)
Temperature
(-40~ 1000) ℃ / (-40 ~1832) ℉
±(1.0%+5)
Special function
CM-2056
NCV test
√
True RMS test
√
Diode test
√
Continuity test
Less than 50Ω±10Ω
Low battery indicator
Approx. less than 2.4 V
Data hold
√
Auto power off
About 15 minutes
Function protection
√
Clamp light
√
Backlight display
√
Input impedance
10MΩ
Sampling rate
3 times/s
AC frequency response
Current 50-60Hz/ voltage 50-400Hz
Operation method
Auto or manual range
Max display
4000
Clamp opens
52mm
Battery
3V (2*AAA battery)
General Characteristic
Meter color
Orange and Black
Meter weight
About 280g (including battery)
Meter size
270×123×50mm
Standard accessory
Test leads, battery, manual, TP01 temperature probe
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DC stabilized power supply. The output voltage and current can be adjusted continuously within
the rated range. Double digital display shows output voltage and current independently. Several
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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.
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