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Model DH1715A Dual Dual- - - Channel Channel Regulated Model Model DH1715A DH1715A Dual Channel 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...
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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...
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DESCRIPTION DESCRIPTION DESCRIPTION The Model DH1715A Dual-Channel 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.
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Continue: DH1715A-3 DH1715A-5 Model 32V-2A 32V-3A 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 (+400×10 Temperature Coe.
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2.1 Description Description Description of of of Constant Constant Constant- - - Voltage Voltage Voltage Mode 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.
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RL=5Ω Load Line RL=10Ω CC Mode (RL<5Ω) RL=2.5Ω Figure 2 2.5 Output Output Output Switching Switching Switching Circuit 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’...
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potentiometer to a required voltage value and then press the “OUTPUT” button. While the voltage is available at the binding post, at the moment, the constant-voltage mode starts operating. If the voltage value drops, in this case the instrument is in constant-current Mode, should set the CC setting potentiometer to the extreme position clockwise.
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Eo=1/10 E .a (V) Where Em: Maximum rated voltage (V) El: External control voltage signal (V) 0V ≤E ≤<l0V 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.
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Range of isβ0–1 which depends on the current setting potentiometer, when it is turned to 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.
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4.9.1 4.9.1 Each slave unit should be previously connected with the master unit in remote control 4.9.1 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.
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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”...
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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. 5. 5.4 4 4 Ca1ibration of Voltage Indication (1) Connect a digital voltmeter with accuracy ≥0.05% to the output terminal.
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Table 2. Model DH1715A-3 DH1715A-5 Adjustment 32V~2A 32V~3A Calibrated. Standard Ammeter I 33.3V 33.3V Max. Variable CV Setting Range E 0 (max.) Max. Variable CV Setting Range I 2.10A 3.15A 0 (max.) setting of Relay Switch Circuit 20V,10.5V 20V,10.5V 5. 5. 5.9 9 9 Failure and Cause 5.9.1...
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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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