Tenma 72-8345A, Руководство пользователя

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Constant Voltage (CV), Automatic crossover & Constant Current (CC)
The power supply functions as a constant voltage source (CV) as long as the load current is less than the preset current limiting
value. When the load current is equal to or greater than the preset current limiting value, the power supply will automatically
cross over to the constant current mode, voltage will drop, (CC) will show on the LCD display panel and it will operate as a
constant current source.
When the load current drops below the preset current limiting value, the supply returns to constant voltage (CV) mode.
Set the Output Voltage and Presetting Current Limiting Value (CC)
Push the knobs one time to check the preset voltage and current level. Push the knobs again until the decimal place which you
want to adjust. The selected decimal place will flash. Turn the knobs to adjust your desired value.
To check the preset voltage and current level, just turn the knobs lightly in any direction or just push the knobs one time.
Connection and Operation Procedure
1. After checking with the rating label plug in to AC mains.
2. Switch on the power supply and the LCD display should be on at the same time.
3. The (CV) icon should be shown on the display.
4. Turn to current volume knob

to maximum clockwise if you do not require lower Current limiting value, otherwise do the preset the
(CC) limiting procedure.
5. Set your desired output voltage and then turn off the output terminal by push button  .
6. Connect to your load positive to positive and negative to negative.
7. Turn on the output terminal again and check if display shows (CV).
8. If display shows (CC), either your preset current limiting value is too low or your load requires more voltage and current. You need to
re-access the voltage and current requirement of your load and increase the voltage or current accordingly until (CV) appears.
Tracking Output Over Voltage Protection (OVP)
This is to protect the connected load in the event that the output voltage control circuit mal-functions, the maximum output
voltage will not exceed 30% of the adjusted voltage value at the time of the operation.
Over Temperature Protection
When the temperature inside the power supply becomes higher than a pre-determined value, the output voltage and current of
the power supply will automatically decrease to zero to prevent damage to power supply. When the temperature inside the
power supply returns to about 65°C then the power supply will automatically return to operation again.
SPECIFICATIONS
72-8350A 72-8345A 72-8340A
Input Voltage (Jumper Selection) 90 - 130 / 180 - 264Vac , 50 / 60Hz~
Full Load Input Current at 120Vac 1.9A
Output Voltage Adjustable Range 1.0 - 20Vdc 1.0 – 36Vdc 1.0 - 60Vdc
Output Current Adjustable Range 0 - 5A 0 - 3A 0 - 1.6A
Voltage Regulation
Load from 10% to 100% Variation 120mV 50mV 50mV
Line from 100 to 132Vac Variation 20mV
Ripple & Noise in r.m.s. 5mV 5mV 8mV
Ripple & Noise (peak to peak) 30mV 50mV 100mV
Current Regulation
Load from 10% to 100% Variation 20mA
Line from 100 to 132Vac Variation 20mA
Ripple & Noise (peak to peak) 70mA 20mA 20mA
Switching Operation Frequency 80KHz to 120KHz
Power Factor 0.65
Efficiency at Maximum Power 80% 80% 78%
Volt and Amp Control Type Rotary Encoder
Voltmeter and Ammeter Display 4 Digit
Voltmeter Accuracy ±0.5% +5counts for range V≤5V ±0.5% +5counts for range V≤10V ±0.5% +5counts for range V≤20V
±0.5% +3counts for range V>5V ±0.5% +3counts for range V>10V ±0.5% +3counts for range V>20V
Ammeter Accuracy ±0.5% +5counts for range I≤2A ±0.5% +5counts for range I≤1A ±0.5% +5counts for range I≤0.5A
±0.5% +3counts for range I>2A ±0.5% +3counts for range I>1A ±0.5% +3counts for range I>0.5A
LCD Indication CC, CV, Amp, Volt, Output ON-OFF
Protection Short Circuit, Overload, Over Temperature, Tracking OVP
CE Approvals LVD : EN 61010 , EMC : EN 55011
Cooling System Natural Convection
Dimensions in mm (WxHxD) 70 x 150 x 250mm / 2.8 x 6.0 x 9.8in.
Weight in Kg 2Kgs / 4.4Lbs
Remarks All the data are based on 120V 60Hz~