4
Continue:
2.
2.
2.
2.
OPE
OPE
OPE
OPE
R
R
R
R
ATING
ATING
ATING
ATING
PRINCIPLE
PRINCIPLE
PRINCIPLE
PRINCIPLE
The feature of this power supply is that the output voltage signal of constant Voltage circuit
and the output current signal of constant current circuit both are applied to the “GATE”
circuit at the same time. According to requirement of the load, the power supply is
determined to operate in the CV mode or in the CC mode, the automatic switching of the
regulated voltage and the regulated current can solve the problems of over—current
protection of the regulated power supply and the over—voltage protection of the regulated
current power supply.
CONTROL
CONTROL
CONTROL
CONTROL
CIRCUIT:
CIRCUIT:
CIRCUIT:
CIRCUIT:
It is an adjustable reference voltage generator. The output current
and voltage depend on setting the reference voltage.
Model
DH1719A-2
24V-5A
DH1719A-3
32V-4A
DH1719A-4
55V-2A
DH1719A-5
100V-1A
D
C
V
O
L
T
M
E
T
E
R
Range Selection
Accuracy of Voltmeter
±
(0.5%rdg + 3dgts, at 20
±2℃ and < 80%RH
Maximum Allowable Application Voltage
D
C
A
M
M
E
T
E
R
Full Scale (Fixed Range)
Ammeter Accuracy(at20
±2℃ and<80%RH)
±
1rdg + 5dgts
Temperature Coe.
(+400
×
10
-6
)
/℃ full-scale + the accuracy mentioned above
Zero Drift
Not greater than 3dgts within 0-40
℃
Input Fuse
2A
Output Fuse
Weight
≤
8kg
External Dimensions
305(L)
×200(W)×170(H)mm
Reliability of the Instrument
MTBF (
θ
)
≥
5000 hours
Remote
Control
Signal
T
ra
ns
fo
rm
er
Relay Switching and
Aux. Supply Circuit
Output Switch Circuit
Reference Voltage
DC
Remote
Control
Circuit
Voltage
Sampling
Control
Circuit
Rectify
and Filting
Series
Setting
Amplify
Gate
-
CC
Diff
Ampl
+
-
CV
Diff.
Ampl
+
A/D
Conv
AC 220V
Meter Circuit
Current
Sampling
Figure 1
