DAHUA DH1716 User Manual

odel

MMM

odel

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DH1716

DH1716

DH1716

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CC/CV

DCDCDC

CC/CV

CC/CV

PPP

User

User

User

ower

ower

ower

SSS

Manual

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Manual

Manual

upply

upply

upply

Dahua

Dahua

Dahua

Company

Company

Company

Electronic

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Electronic

Electronic

Instrument

Instrument

Instrument

ininin

Beijing

Beijing

Beijing

2

NOTE:

CONTENTS

CONTENTS

CONTENTS

1 ． D escription
2 ． Operating Features
3 ． Operating Principle
4 ． Applications and Operating
5 ． Maintenance and Replacement
6 ． Completeness of the Instrument
7 ． Quality Warranty

Checking

Checking

Checking

No matter the output of the load
checking the specifictions of
terminal on the rear panel (see SJ2811-standard).

CV.

Please connect a checking wire to +S,-S connection

Specification

Specification

Specification

is

from the front or rear output terminal,When

3

Description

Model

Spee

DH1716-1

DH1716-2

DH1716-3

Setting Range of

Output

Voltage

0~12.5V

0~18.5V

0~18.5V

Control Range of

Output

Voltage

0~12V

0~18V

0~18V

Setting Range of

Output Current

0~50.5A

0~50.5A

0~30.5

Control Range of

Output Current

0~50A

0~50V

0~30V

Model

Spee

DH1716-4

DH1716-5

DH1716-6

DH1716-7

Setting Range of

Output

Voltage

0~36V

0~62V

0~103V

0~13V

Control Range of

Output

Voltage

0~35V

0~60V

0~100V

0~30V

Setting Range of

Output Current

0~20.2A

0~10.2

0~5.2A

30.5A

Control Range of

Output Current

0~20A

0~10A

0~5A

0~30A

1. Description

Description

Model DH1716 family

is

a single — channel CV/CC power supply which provides a

medium power with CV 、 CC auto — crossover operation mode. In order to improve the
reliability of the power supply, it adopts a phase control circuit, an over — voltage
protection circuit at the output terminal and a built — in over — temperature protection
relay. This power supply off

Remote resistance programming and remote voltage programming .so it

ers

functions of master — slave series and parallel connection .

is

an ideal DC
stabilized power supply .This unit can be widely used in factories research institutes,
laboratories and vario

Technical

2.2.2.

Technical

Technical

us

national economic departments.

Features

Features

Features

2.1.Product Specifications

2.1.

Performances and Specifications

2.2.1. In CV Operation: Source effect: 0.005%+1mV
Load effeft: 0.005%+2mV
P ARD(Period and Random Deviation):1mV(rms)

2.2.2. In CC Operation: Suorce effect : 0.005%+10mA
Load effect: 0.005%+10mA
P ARD (Period and Random Deviation ):20mA (ram)

2.2.3.

Voltage

drift in CV operation:5 × 10

2.2.4 . U sing two sets of similar products in series

2.2.5. U sing two sets of similar products in parallei

-4

+5mV/1hs(20 ± 2 ℃ )

is

allowable

is

allowable

2.2.6. Remote programming in use (with an external sampling function)

2.2.7. Remote resistance programming output voltage:

its

resistance value: 0~10K Ω

2.2.8. Remote voltage programming output voltage: voltage range: 0~10V

4

2.2.9. Remote resistance programming output current: resistance range:0~10 k Ω .

~220v

50Hz

CV

Operational

Amp .

CC

Operational

Amp .

R

R ect and

Filter

Series

Regulator

Phase

Control

Tran s

former

Aux. Power

Supply

Current and voltage

Control Circuit

Gate

Circuit

Over-voltage

Protection Circuit

Amp.

Circuit

Fig.1

2.2.10. Remote voltage programming output current: voltage range: 0~10V .

2.2.11.*Over-volatage protection voltage:5.5~40V adjustable, when the instrument
has an over – voltage output, the switch of the unit can cut off total source automatically
(when “ OUTPUT ”

is

on)

2.2.12. * Accuracy of the meter :2.5%,using a digital meter.Indication accuracy: 1%
± 2 counts

2.3. Warm up :15 minutes, but when measuring drift for 1 hour

is

needed

2.4. * Power consumpsion of the whole unit: apparent power: 2.3KW(at 242V)

actual power consumpsion: About 1.2KW(depending on the circuit)

2.5. * Output power :700W

2.6. Environment condition: Conform to Ⅱ group in the

Table

of Sandard

SJ2075-82 (General Programme of Electronic Measuring Instrument Environment Test)

2.7 Continuous operation: 8hs

2.8 Power supply:AC 220V ± 10%

2.9 Frequency of power supply:50 ± 2.5Hz

2.10 * Dimensions:230 × 16 0 × 550mm

2.11 * Weight: About 30kg

Operation

3.3.3.

Operation

Operation

Principle

Principle

Principle

3.1. Circuit Characteristics

The voltage drop of a regulator

is

fed back to phase-control circuit U13-2 for
compareson so that can change the conducting angle of SCR,i.e,itcan change the output
voltage of a rectifier so

as

to keep the voltage drop on the regulator constant basically

The CV/CC circuits transfer signals to a gate circuit simutaneously, according to

5

the needs of the load, determinate

10V

10A5A05VD

CBA

RL=2 Ω

RL=0.5 Ω

RL=1 Ω

CCCVFig.2

it is

in CV operation or CC operation. The green lamp
lights in CV operation mode. The red lamp lights in CC operation mode. The voltage
and current can be preset when the instrumemt has no output.

3.2. Brief Description of CV Section

An

adjustable reference circuit consists of
multiturn potentiometer
operational amplifier U4

on

the panel, vernier potentiometers VR1 and VR2. Single

is

a sampling amplifier of CV section. The output voltage
output terminal through a voltage divider along with a reference voltage
operational amplifier U4-3. The positive terminal of the output voltage

an

operational amplifier 1/2 U3,a

is

applied to the

is

connected to

at

the negative terminal of operational amplifier U4-2,the voltage from the output te rminal
of the amplifier passes through the gate circuit and

is

amplifed to control the regulator.

3.3. Brief Description of CC Section

An

adjustable reference voltage circuit consists of an operational amplifier 1/2 U3, a
potentiometer
amplifier U5
of the standard sampling resistor along with the reference voltage

on

the panel, vernier potentiometers VR3 and VR4. Single operational

is

an sampling amplifier of CC section. The voltage

at

the negative term inal

is

appied to the positive
phase terminal of sampling amplifier U4-3,the negative terminal of amplifier U4-2
connected to the positive termnal of the sampling resistor. The output v oltage from the
amplifier passes through the gate ciruit and

is

amplified to control the regulator.

3.4. CV/CC Conversion, CV Mode~CC Mode
Set the current potentiometer, CC

is

set to a preset value to reduce the resistance
the load. The output current increases. when the output current has reached the preset
current value, the oupout voltage decreases, the output current also can not incr ease, that
means the instrument has gone into CC operation mode, even through the resistance
the load

is

shorted to zero, the output current also can not increase ,that means the
instrument can transfer from CV operation mode into CC operation mode aut omatically,
making the load no over-current ,meanwhile also protecting the instrument itself, vice­versa, that

is

to

say

,the CV/CC can transfer operation modes of the power supply

automatically.

the

is

on

on

Fig.2 shows the operating points and range of the preset voltage /current of the

load line.