HT3003PB HT3005PB
MULTI-OUTPUT
DC REGULATED POWER SUPPLY
This series include two-way and three-way DC regulated power supply.
Three-way have high accuracy output of which two way are adjustable and one
way is fixed.
The two adjustable outputs can be selected for constant voltage (C.V.) or constant
current (C.C.), designed in high stability and performance circuit. In constant
voltage operation mode the output voltage can be arbitrarily adjusted from 0V on
in the nominal range. In constant current operation mode, the output current can
be adjusted from 0A on in the nominal range.
The two outputs can be connected in parallel or in series, while the master adjust
controls the voltage and current setting. The fixed output voltage is 5V. This
output features good stability and low ripple along with overload (e.g. short circuit)
protection.
The unit features small size and excellent performance combined with an elegant
design, being ideal for research university industry and appliance maintenance
laboratories.
1. Technical Specification
1. Model: HT3003PB, HT3005PB
1.1.1 Input voltage: 220VAC 50Hz
1.2 Two adjustable outputs
1.2.1 Output voltage: 0-30V(adjustable continuously)
1.2.2 Output current: 0-3A 0-5A(adjustable continuously)
1.2.3 Source regulation: Cv≤0.01%+3mV
Cv≤0.01%+5mV
1.2.4 Load regulation: Cv≤0.01%+2mV(rated≤5A)
Cv≤0.01%+5mV(rated＞5A)
Cc≤0.01%+6mV
1.2.5 Ripple and noise: CV≤1mV(rms)
CV≤20mVp-p
CC≤3mA(rms)
CC≤50mAp-p
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1.2.6 Protection: current-limiting protection
1.2.7 Indication: Voltmeter & Ammeter or 3-digit volt-(LED) &Amp-(LED)
a. Volt-indication: (LED)±1%±2digits
b. Amp-indication: (LED)±2%±2digits
1.3 Fixed output:
1.3.1 Output voltage: 5V±3
1.3.2 Output current: 3A
1.3.3 Source regulation: ≤1×10 1mV
1.3.4 Load regulation: ≤1×10
1.3.5 Ripple noise: ≤0 5mV rms ≤10mVp-p
1.3.6 Protection: current limiting short circuit protection
1.4 Operating ambient
1.4.1 Operating temperature: 0 to 40°C
1.4.2 Relative humidity: less than 90
1.5 Size: 360mm×265mm×165mm
1.6 Operating time: 8hours continuously
2. Operation
2.1 Controls and description of front-panel
(1) Meter or (LED): indicates master output voltage and current value.
(4) Meter or (LED): indicates slave output voltage and current value.
(5) Slave constant voltage adjustment: adjust slave output voltage value.
(6) Slave constant current adjustment: adjust slave output current value. (adjust
the current-limiting protection point).
(7) Power switch: It is set to “ON” state (the switch is pressed in), the unit is
switched on, at this time the constant voltage (C.V.) or constant current (C.C.)
indicator is on, otherwise, the unit is in “OFF” state (the switch is sprung out).
(8) Slave constant current state or two-way parallel state indicator: When slave
output is in constant current state or the two adjustable is in parallel, this
indicator is on.
(9) Slave constant voltage indicator: When slave output is in constant voltage
state, this indicator is on.
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(10) Slave output negative binding post: Negative polarity of output voltage is
connected to negative terminal of load.
(11) Case grounded terminal: The case is connected to the earth.
(12) Slave output positive binding post: positive polarity of output voltage is
connected to positive terminal of load.
(13/14) The control switch for selecting the two adjustable outputs independent,
series or parallel.
(15) Master output negative binding post: Negative polarity of output voltage is
connected to negative terminal of load.
(16) Case grounded terminal: The case is connected to the earth.
(17) Master output positive binding post: Positive polarity of output voltage is
connected to positive terminal of load.
(18) Master output constant current state indicator: When master output is in
constant current state, this indicator is on.
(19) Master output constant voltage state indicator: When master output power
is in constant voltage state this indicator is on.
(20) Fixed 5V DC output negative binding post: Negative polarity of output
voltage is connected to negative terminal of load.
(21) Fixed 5V DC output positive binding post: Positive polarity of output voltage
is connected to positive terminal of load.
(22) Master output constant current adjustment: Adjust master output current
value Adjust current limiting protection point.
(23) Master output constant voltage adjustment: Adjust master output voltage
value.
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2.2 Operating procedure
2.2.1 Independence use of two adjustable outputs.
2.2.1.1 Set the (13) and (14) switch to spring out position ( position).
2.2.1.2 When the adjustable output is used as C.V. output, first should rotate
clockwise the C.C. adjustment (6) and (22) to Max, then turn on power switch (7),
adjust C.V. adjustment (5) and (23) till slave & master DC output voltage reach
required voltage value, at this time, the C.C. indicator (8) and (18) light off.
2.2.1.3 Used as C.C. output, after turning on power switch (7), first rotate
clockwise the C.V. adjustment (5) and (23) to Max, while rotate counterclockwise
the C.C. adjustment (6) and (22) to Min, then connect the required load, again
rotate clockwise adjustment (6) and (22) till output current reach the required
current value. At this time the C.V. State indicator (9) and (19) go out and the C.C.
state indicator (8) and (18) light on.
2.2.1.4 Used as the C.V. output, in general the C.C. adjustment (6) and (22)
should be set to Max, but for this unit, the current-limiting protection point can also
be set arbitrarily. Setting procedure is: Turn on power, rotate counterclockwise the
C.C. adjustment (6) and (22) to Min, then make the positive and negative output
terminal in short connection and rotate clockwise the C.C. Adjustment (6) and (22)
till output current equal to the required current-limiting protection point so the
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current-limiting protection point is well set.
2.2.2 Series using of the two adjustable outputs
2.2.2.1 Press in switch (13) ( position), switch (14) is set to “OUT” position
( position). At this time, turn the master voltage adjustment (23) and the
slave output voltage tracks strictly the master output voltage, and the output
voltage can be up to 60V (voltage between terminal of (10) and (17)).
2.2.2.2 Before the series connecting, it must be examined if the negative terminals
of both master and slave output are connected to GND terminal, if they are, it
must be disconnected, otherwise short-circuit will be caused in the slave output
when the two outputs are connected in series.
2.2.2.3 When the two outputs are in series, the output voltage is controlled by
master output, but current adjustment of two outputs is still independent.
Therefore, attention should be paid to the position of the C.C. adjustment (6). For
example, knob (6) is at the position of counter- clockwise to end or current of
slave output excesses current- limiting protection point, at this time the voltage of
slave output will not track the voltage of master. So knob (6) should be rotated
clockwise to Max, when the two output are in series.
2.2.2.4 By series connection, if there is power output, proper leads corresponding
to output power should be used to short connect the negative terminal of master
output with positive terminal of slave output reliably. Since it is shorted by a switch
inside the unit, current will pass on the shorted switch when there is power output.
This will affect the reliability of the unit.
2.2.3 Parallel using of the two adjustable outputs
2.2.3.1 Press in switch (13) ( position) as well as switch (14) ( position),
at this time, the two outputs are in parallel, adjust voltage adjustment (23) of
master output the voltage of two ways keep same, and slave output C.C. indicator
8 lights on.
2.2.3.2 When the two outputs are in parallel, the C.C. adjustment (6) of slave
output does not work When used as C.C. Supply simply adjust the C.C.
adjustment (22) of master output, at this time output current of both master and
slave output are controlled by it and are same, output current is up to 6A or10A.
5 6
2.2.3.3 While the two outputs in parallel, proper leads corresponding to
outputpower be used to short reliably the two positive terminals and the two
negative terminals of master & slave output separately, so as to make load
connected reliably with the two parallel outputs. If the load is only connected to
one of the output terminal, unbalance may be caused to current of the two outputs,
this may also damage the series/parallel switch.
2.3 The digital display is in 3-digit If you need more accurate indication, please
use more precise measuring instrument to calibrate it in outer circuit.
2.4 Cautions
2.4.1 The unit has perfect protection function, 5V output has reliable protection for
current - limiting and short circuit. The two adjustable outputs have current limiting
protection. As there is controlling circuit for regulating transistor’s power loss in
the circuit when short circuit occurs, power loss on large power transistor is not
very high, it can not cause any damage to the unit. But there is still power loss
when short circuit, in order to reduce aging and energy consumption, so this
situation should be find as soon as possible and turn off power then exclude the
faults.
2.4.2 After operating, put the unit in a dry place of good ventilation, and keep it
clean. If it is not in use for a long period, pull off the power supply plug for storage.
2.4.3 For maintenance input voltage must be cut off.
2.4.4 The faults may be caused by the improper operation or abnormal operating
ambient and component failure inside the unit. When the faults occur, the output
voltage maybe exceed max Rated output voltage. Take care when operation and
avoid unnecessary damage of load.
2.4.5 For safety operation, the 3-pin ground terminal of power cord must be
grounded securely.
3. Accessories
3.1 Instruction manual 1 copy
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