5
2
5
6
4
220V
and liquid crystal display, or the digital meter with higher precision.
(1.9)Service environment: 0~+40
, relative humidity < 90%
(1.10)Working time: can continuously work for long time
(1.11)Others: The two-circuit power source can track the main and secondary
circuit. And it also can be used in series and parallel connection.
Input
Transformer
Auxiliary
voltage
stabilizer
Reference
voltage
Cv
comparison
amplifier
Cc
comparison
amplifier
Sampling
circuit
AND
gate
circuit
Pre-
stabilizing
control
Comparison
drive circuit
Adjusting circuit
Output
direct
current (DC)
Current stabilized
filtration
II. Working principle
The main circuit makes the voltage adjusting range of the circuit widen and the
precision heighten with the new design plan of suspension amplify and pre-
stabilization to keep long-term stable and reliable work. The pre-stabilizing gear-
shifting circuit is changed by the drive circuit through comparing the output voltage
change and the auxiliary voltage-stabilized power source to make the voltage drop
on the adjusting tube remain unchanged basically. That can not only guarantee the
adjusting tube to be operated safely and reliably for a long time, but also improve
the efficiency of the machine.
The adjusting circuit is adjusted by the series linear and controlled by the output of the
voltage (current) comparison amplifier to make the output voltage (current) constant.
When be in constant voltage, the voltage comparison amplifier is at the priority control
state against the adjusting tube. When outputting voltage and when the riginal voltage
value is deviated for the changing of the input voltage or the load, input the changed
voltage quantity and sampling resistance to the inverted input end of the comparison
amplifier. Amplify after comparing with the reference voltage set by the in-phase input
end to control the adjusting tube and make the output voltage close to the original value.
So then stabilize the voltage. When the circuit works in constant current, the power
source comparison amplifier is at the control state and the control process is completely
the same as that in the constant voltage.
The working state of the circuit can be changed automatically. When the load is
Diagram 21 Circuit functional block diagram
General maintenance
If the power source is used in normal condition, the general maintenance is unneeded
usually. If the voltage-stabilizing scope deviates from the rated value for being used
for a long time, the voltage-adjusting knob can be adjusted to the max value and the
voltage limiting potentiometer (RP2 or RP6) on the circuit board can be adjusted, and
then the rated value of the output voltage can be added 3V or less. If the output current
scope deviates from the rated value, the current-adjusting knob can be adjusted to the
max value and the current limiting potentiometer (RP1 or RP5) on the circuit board
can be adjusted, and then the rated value of the output value can be added 10% or
less.
Complete set of package of Model Hb1701 series includes following:
1. A main machine of Model HB1701
2. An Operation Instruction Manual
3. Two input fuse tubes of BG P520
4. A Quality Certificate
5. A Guarantee Card for the product.
Completeness
Quality Guarantee
If users observe the transport, storage and qualified rules and the quality of the
product is lower than the technical index within 18 months from the day the product
leaving the factory, the factory is in charge of maintaining and replacing freely.
1.Strictly forbid hot-line work operated by the unprofessional personnel.
2.The company does not responsible for the problems in the aspects of safety and
quality, if maintaining or replacing the parts are not provided by the company.
OMEGA
DC
Stabilized
power
source
Summary of Contents for HB1700S
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