MCH 300 Series User manual

OPERATION MANUAL
SWITCHING DC POWER SUPPLY

INDEX
1. Introduction ………………………………… (1)
2. Model type ……………………………………… (2)
3. Specifications …………………………………… (3)
3. Front panel & operations …………………………(4-6)
4. Accessories & Maintenance ………………..…….(7)

1、INTRODUCTION
300 series power supply is a newly developed model
with high stability and accuracy. Its unique block-like structure
makes it easily to be extended from single channel to
multi-channel. It is an ideal instrument for R&D departments,
colleges and factories.
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2、MODELTYPE
2
Model
Voltage
0~30V
Voltage
0~60V
Current
Fixed
output
5V/2A
Dual
output
Spot
0~
2
A
0~
3A
0~
5A
0~
10A
0~
20A
302A
●
●
●
303A
●
●
●
305A
●
●
●
3010A
●
●
3020A
●
●
302B
●
●
●
●
302B
●
●
●
●
302B
●
●
●
●
302DII
●
●
●
●
●
303DII
●
●
●
●
●
305DII
●
●
●
●
●
3010DII
●
●
●
●
3020DII
●
●
●
●
6010DII
●
●
●
●
6020DII
●
●
●
●
605D
●
●
●

2.1 specifications
Model
Dual output models
Single output models
Variable Output:
Output Voltage
0~30V continuously adjustable
Output Current:
0~ specified value continuously adjustable
Source Regulation
≤0.01% +3mV
Load Regulation
≤0.01% +3mV
Ripple & Noise
≤ 20mVrms
Tracing Error
0.5% +10mV
---------
Display
3 or 4 digit LED
3 or 4 digit LED
Display Error
≤0.5% + 1digit
Fixed Output
Output Voltage
5V
Output Current:
2A
Source Regulation
≤5mV
Load Regulation
≤0.01％+ 3mV
Ripple & Noise
≤ 20mVrms
Others
Line Power Supply
220V±10%
Operating Ambient
Temperature：0℃-40℃，Humidity：≤90％RH
Dimension
240X150X270(mm)
120X150X270(mm)
Weight
Approx. 8kg
Approx. 5kg
3

3、FRONT PANEL & OPERATION
Panel description：3 or 4 digit display
Left "B" series
right "Aseries"
overall "DII" series
4

3.1 Functions of the controls on front panel
(1)(2) 3 or 4 digit LED display.
(3)(4) CV and CC indicators. If the current (calculated by
Ohm’s law) through the load is lower than the preset current
value of the power supply, CV indicator lights, the power
supply is working in Constant Voltage status. Otherwise, CC
indicator lights, the power supply is in Constant Current
status. And the actual current though the load is limited to
the preset current value.
(5) Independent/Series/Parallel Controls. When the power
supply is set in series mode, two channels are connected
serially. Voltage of Channel A will follow that of Channel B.
Then a pair of same value and different polarity voltage is
acquired, and you can get a doubled voltage from positive
port of CH-B and negative port of CH-A. When the power
supply is set in parallel mode, two channels are connected
parallel. And you can get a doubled current from either port
o f t w o c h a n n e l s .
(6) Power switch.
(7)(8) Voltage adjustment. If in tracking state, the switches
of channel A are not available.
(9)(10) Current adjustment, to set constant current value.
(11) Output port No.1, fixed 5V/1A output.
(12) Output port No.2, it is controlled by switch (7) and (9).
(13) Output port No.3, it is controlled by switch (8) and (10).
5

3.2 Operation
Connection of output ports:
Port No.2 and No.3 is in floating mode, you can get
different polarity voltage by connecting positive or negative
terminal on both sides to the ground-terminal in the middle.
Port No.1 is a fixed output. Its negative terminal had been
grounded internally.
Voltage Setting:
Adjust voltage knob to get desired voltage.
Current Setting:
Turn current control knob CCW to get a small value of
current, short cut output port, adjust current knob to get a
desired value.
Serial Usage:
Select series mode with Buttons (5), Use “+”end of port
no.3 and “-” end of port no.2 as output terminal. Output
voltage is the summation of channel A and channel B.
Parallel Usage:
Select series mode with Buttons (5), Use either one of
output terminals of two channels, a doubled current can be
acquired.
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4、ACCESSORIES & MAINTENANCE
Power Cord 1pc
User’s Manual 1pc
Fuse 1pc
4.1 Caution
1、If there is no problem with the line power and CV indicator
dose not light after power on, the fuse probably was broken.
Power off and disconnect the power cord, and change the
fuse.
2、When working in Constant Voltage state，if output voltage
lower than what was preset and CC indicator lights, the
instrument automatically turn to Constant Current state. You
must check the load or increase the output current.
3、When working in Constant Voltage state, if output current
lower than what was preset and CV indicator lights, the
instrument automatically turn to Constant Voltage state. You
must check the load or increase the output voltage.
4、When the instrument is unstable in Constant Voltage state，
Probably the line voltage is under 90% of the rated value. If
the problem is not caused by the line voltage, contact your
nearest dealer.
7