99 Washington Street Melrose, MA 02176 Fax 781-665-0780 TestEquipmentDepot.com DC POWER SUPPLY GP-4303D 3.00 30.0 A C.C CURRENT POWER V C.V FINE - VOLTAGE GND + C.C DC POWER SUPPLY GP-4303A CURRENT POWER R FINE - C.V .
INSTRUCTIONS Thank you for purchasing EZ DIGITAL products. The instruments produced by EZ DIGITAL are high products technpl ogy products made under strict quality control. We guarantee their exceptional precision and utmost reliability. For proper use of this product, please read this manual carefully. EZ Digital Co., Ltd. 1. To maintain the precision and the reliability of the product , use it in the standard setting.
1. INTRODUCTION GP-4303A/D, 4185A/D series are regulated DC POWER SULLPY units with voltmeter and amperemeter : GP-4303A/D can supply the DC power of 0 to 30V/3A GP-4185A/D can supply 0 to 18V/5A.
3. PRECAUTIONS 3-1. Line voltage selection This instrument must be operated with the correct line voltage selector switch setting and the correct line fuse for the line voltage selected to prevent damage. The instrument operates from either a 90V to 132V or 198V to 250V line source. Before line voltage is applied to the instrument , make sure the line voltage selector switch is set correctly.
2. Don't use this instrument immediately after bring it in from the cold. Allow time for it to warm to room temperature. Similary don't move it from a warm place to a very cold place,as condensation might impair its operation. 3. Do not expose the instrument to wet or dusty enviroments. 4. Do not place liquid-filled containers on top of this instrument. A spill could seriously damage the instrument. 5.
4. SPECIFICATIONS Model GP-4303D GP-4303A Output polarity Output current Load Regulation GP-4185A Positive & Negative 0 ~3A Ripple Voltage Line Regulation GP-4185D 0 ~5A Less than 2mVp-p Less than 0.01% +2mV for power source voltage change of ±10% Less than 0.01% +3mV for load variation of 0 to 100% Voltmeter Accuracy ±(1%±1digit) 2.5% F S ±(1%±1digit) 2.
5.DECRIPTION OF PANEL FUNCTION 5-1. Front Panel Description ③ ② ② DC POWER SUPPLY GP-4303D 3.00 A ④ ④ C . CC . C D C POWE R SUPPLY GP-4303A C.V ⑤ CUR RENT FINE VOLTAGE ⑥ P OWER - GND + C .C ⑤ C .V ⑥ ⑧ ⑧ ⑦ ⑦ P OWER - GND + ON ① OFF ⑬ ③ CURR ENT FINE V OLTAGE ON ① 30.
6. OPERATIONS 6-1 INDEPENDENT OPERATION (1) The (+) terminal or the(-) terminal is to be connected always to the GND. Terminal(GND) with short circuit bar as an accessory should be connected as shown in Fig6-1. When positive output polarity is required.
6-2 SERIES OPERATION (1) By connecting a couple of the units in series a higher voltage than a single unit is available. In such a case,no terminal should be appli ed with a voltage more than the rating voltage against the ground potential between a terminal and panel chassis. The rating voltage against the ground is ±100V.
6-3 PARALLEL OPERATION (1) When a current capacity larger than a single unit is required, a couple of the units may be used in a parallel connection. In a parallel operation,a unit becomes the main unit and other becomes the sub-unit. Setting of the voltage and current should be made of the main unit.
8. CURRENT LIMITING CIRCUIT When the output terminals are short circuited by mistake,the current limiting circuit is activated to limit the flow of the current in excess of the rati ng output current,so that the control elements and the amperemeters connected in series operation an be protected from the sudden damage.
