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Model
Model DH1719A
Model
Voltage/Current
Voltage/Current Power
Voltage/Current
Dah h h ua
Da
ua
Company of of of Electronic
Company
Da
ua Company
DH1719A
DH1719A Regulated
Power
Power Supply
User' ' ' s s s Manual
User
Manual
User
Manual
Electronic
Electronic Instrument
Regulated
Regulated
Supply
Supply
Instrument in in in Beijing
Instrument
Beijing
Beijing
1
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Summary of Contents for Dahua DH1719A
- Page 1 Model DH1719A Regulated Model Model DH1719A DH1719A Regulated Regulated Voltage/Current Power Supply Voltage/Current Voltage/Current Power Power Supply Supply User User’ ’ ’ s s s Manual Manual User Manual Dah h h ua Company Company of of of Electronic Electronic...
- Page 2 CONTENTS CONTENTS CONTENTS Description Description Description 1. Operating Features 2. Operating Principle 3. Structure Features 4. Applications 5. Maintenance 6. Completeness of the Instrument 7. Storage 8. Guarantee...
- Page 3 DESCRIPTION DESCRIPTION DESCRIPTION The Model DH1719A Regulated Voltage/Current Power Supply is an automatic switching type of high accuracy CV/CC power supply with a 3 digits display meter on the front panel. The output voltage and the output current can be displayed by ON /OFF switch on the front panel.
- Page 4 Continue: DH1719A-2 DH1719A-3 DH1719A-4 DH1719A-5 Model 24V-5A 32V-4A 55V-2A 100V-1A Range Selection ±(0.5%rdg + 3dgts, at 20±2℃ and < 80%RH Accuracy of Voltmeter Maximum Allowable Application Voltage Full Scale (Fixed Range) Ammeter Accuracy(at20±2℃ and<80%RH) ±1rdg + 5dgts )/℃ full-scale + the accuracy mentioned above Temperature Coe.
- Page 5 Description Description of of of Constant Constant Constant- - - Voltage Voltage Mode 2.1 Description Voltage Mode Mode The reference output voltage circuit is applied to the negative input terminal of a CV error amplifier, the error voltage from the voltage sampling resistor is applied to the positive input terminal of the CV error amplifier.
- Page 6 Output Switching Circuit 2.5 Output Output Switching Switching Circuit Circuit This instrument provides a special output switch, the output voltage can be preset as required before the switch is unpressed. After the voltage is adjusted, press the switch. This switch is an uncontacted electricity type of switch so it does not generate a mechanical spark, protecting users’...
- Page 7 4.1 Before operation, should check L/R (local/remote control) selector whether on its right position or mot, otherwise it doesn’t operate, generally it is at ‘L’ position. 4.2 Turn on the power supply, press the “V” button by adjusting the voltage setting potentiometer to a required voltage value and then press the “OUTPUT”...
- Page 8 Term αis factor of 0-l which depends on the “voltage” setting potentiometer. Factor is 1 when “VOLTAGE” voltage setting potentiometer is set to the extreme positions clockwise. Factor is 0 when both potentiometers are set to the extreme positions counterclockwise. It is used to select the ratio of the output voltage (Eo) with respect to the external control voltage signal (E1).
- Page 9 the extreme position clockwise, 0 is l, while it is turned to the extreme position counteclockwise, β is 0. Within the range of the factor, by adjusting the externa1 control signal (E ) can performer the proportional relation of the setting output current Io. NOTE NOTE NOTE 1: 1: 1: For wiring of the external control voltage signa1, use a shie1ded cable (or a pair of...
- Page 10 4.9.1 4.9.1 4.9.1 Each slave unit should be previously connected with the master unit in remote control CC operation, and then adjust the current setting potentiometer to the extreme position, making factor ɑ = 1. If differences of the slave unit appear, should trim the current setting potentiometer.
- Page 11 be controlled to increase the output voltage of the setup (uppermost one of the instrument connected in series operates as the master unit). 4.10.1 4.10.1 4.10.1 Except that the master unit is operating in “L” (local) state, all the slave units are in the state of the output voltage controlled by the external voltage signal, that means the master unit’s R/L (remote/local) selector switch is thrown to “L”...
- Page 12 digital meter and always keeping it cleaning. 5.3 Adjustment and Calibration of the Meter RVl: Voltmeter calibration potentiometer for voltage precision. RV2: Maximum voltage setting potentiometer RV3: Maximum current setting potentiometer RV4: Maximum current setting potentiometer for voltage presetting RV5: Ammeter zero–setting potentiometer RV6: Current meter calibration potentiometer for current precision Figure 8 5.
- Page 13 RV1 to required secifications. Table 2. Model DH1719A-2 DH1719A-3 DH1719A-4 DH1719A-5 Adjustment 24V-5A 32V-4A 55V-2A 100V-1A Calibrated. Standard Ammeter I 25.2V 33.3V 105V Max. Variable CV Setting Range E 0 (max.) 5.2A 3.15A 2.1A 1.05A Max. Variable CV Setting Range I 0 (max.)
- Page 14 7 7 7 . . . STORAGE STORAGE STORAGE The instrument should be save up in a ventilated room where the ambient temperature is 5- 45℃, RH ≤90% and dew is not allowed. These conditions are needed to protect the 1iquid crystal display, in addition, keep the instrument from smoke, gas, acid, alkaline and other corrosive materials, be sure not to place the instrument in high temperature and more dust place so as to keep the instrument clean.
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