Model 1672, 1673 Triple Output Power Supply INSTRUCTION MANUAL
1 Safety Summary The following safety precautions apply to both operating and maintenance personnel and must be observed during all phases of operation, service, and repair of this instrument. Before applying power, follow the installation instructions and become familiar with the operating instructions for this instrument. GROUND THE INSTRUMENT To minimize shock hazard, the instrument chassis and cabinet must be connected to an electrical ground.
WARNINGS AND CAUTIONS WARNING and CAUTION statements, such as the following examples, denote a hazard and appear throughout this manual. Follow all instructions contained in these statements. A WARNING statement calls attention to an operating procedure, practice, or condition, which, if not followed correctly, could result in injury or death to personnel.
Compliance Statements Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collection systems) This product is subject to Directive 2002/96/EC of the European Parliament and the Council of the European Union on waste electrical and electronic equipment (WEEE), and in jurisdictions adopting that Directive, is marked as being put on the market after August 13, 2005, and should not be disposed of as unsorted municipal waste.
Table of Contents 1 Safety Summary ..........................................................................................................................1 3 Installation ....................................................................................................................................5 2 Introduction .................................................................................................................................5 3.1 3.2 4 5 3.3 4.1 5.
2 Introduction Description B&K Precision’s 1672 and 1673 triple output DC power supplies provide two variable outputs (0 – 32V/ 0 – 3A [model 1672], 0-6A [model 1673]) and one fixed output (5V/3A). The variable outputs can work independently, in series tracking, or parallel mode. Conveniently adjust voltage and current with independent front panel knobs and bright quad display.
Retain the original packing in case subsequent repackaging for return is required. Use of the original packing is essential. After the mechanical inspection, verify the contents of the shipment. The items included with the instrument are: Power cord • Instruction manual • Pair of test leads (x2) • If the contents are incomplete, or if the instrument does not pass the specification acceptance tests, notify the local service center. 3.
4 Controls and Indicators 4.
13) 14) 15) 16) 17) 18) 19) 20) 21) 22) 23) 24) 4.2 Master current indicator display (3-digit red 0.56” LED) Series mode indicator LED Parallel mode indicator LED Slave voltage indicator display (3-digit green 0.56” LED) Slave current indicator display (3-digit red 0.
5 Operating Instructions 5.1 Setting the Output Voltage and Output Current 1. 2. 3. 4 5. 6. 7. As per load requirement, calculate the voltage and maximum current limit to be set on output. Note: V=IR Disconnect the load from output terminals. For current limit adjustment, turn the current adjustment knob counter-clockwise to get minimum current output. Short the circuit between the positive and negative output terminals by the accessory leads.
For example, if the load is such that the power supply is operating in the constant voltage mode, a regulated output voltage is provided. The output voltage remains constant as the load increases, up until the point where the preset current limit is reached. At that point, the output current becomes constant and the output voltage drops in proportion to further increases in load. The crossover point is indicated by the front panel LED indicators.
LOAD Figure 5 – Series Tracking Mode Load Connection 5.3.3 Parallel Tracking Mode In this mode, the positive output terminal of the master gets connected internally to the positive output terminal of the slave and the negative output terminal of the master gets connected to the negative output terminal of the slave. The output voltage will be the same as the master set value and the output current is twice the set master output current. 1. Pull the current adjustment knob of the master.
LOAD Figure 6 – Parallel Tracking Mode Load Connection 5.3.4 Multiple Units in Series Mode For achieving higher voltage, two or more units can be connected in series (Max 240V only). The output voltage of the system will be the sum of all units. 1. 2. 3. Set the power supplies connected in series operation under series tracking mode as described in Series Tracking mode and adjust to the same output.
Unit 1 Unit 2 LOAD Figure 7 – Connecting Multiple Units in Series 5.3.5 Multiple Units in Parallel Mode Two or more units can be connected in parallel to obtain a higher current output (Max 24A only). 1. Set the power supplies connected in parallel operation under parallel tracking mode as described in parallel tracking mode and adjust all units to the same output voltage. 2. Make the parallel connection of the positive and the negative terminals of the Master and Slave outputs for all units.
Unit 1 Unit 2 Figure 8 – Connecting Multiple Units in Parallel 5.3.6 LOAD Fixed 5V/3A Output This is the standard 5V/ 3A power output provided for supplying the power to TTL logic circuits. When the load exceeds 3A, the red OVERLOAD LED will light up. The output voltage will be lower and the power supply will be under CC mode.
6 Specifications 1672 1673 Output Parameters Number of Outputs Range Three (two variable and one fixed) 0 to 32 VDC / 0 to 3 A (variable) and 5 V / 3 A (fixed) Constant Voltage Mode (variable outputs) Line Regulation Load Regulation Ripple & Noise <0.2% + 10 mV 0 to 32 VDC / 0 to 6 A (variable) and 5 V / 3 A (fixed) <0.01% + 5 mV <1 mVrms (master) <4 mVrms (slave) <1 mVrms Constant Current Mode (variable outputs) Line Regulation Load Regulation Ripple & Noise <0.
General Power Requirements 115/230 V ± 10%, 50/60 Hz ± 10% Humidity 90% R.H. Operating Temperature Temperature Coefficient Dimensions (W x H x D) Weight Included Accessories 50 °F to 104 °F (10 °C to 40 °C) <300PPM / C° (voltage and current) 9” x 6.7” x 12.2” (230 x 170 x 310 mm) 12.6 lbs (5.7 kg) 19.8 lbs (9.0 kg) One Year Warranty Power cord, instruction manual, two pairs of test leads Note: All specifications apply to the unit after a temperature stabilization time of 15 minutes.
• • • • 7.2 Do not obstruct the ventilation holes in the rear panel as this will increase the internal temperature. Do not operate the instrument with the cover removed unless you are a qualified service technician. Clean and recalibrate the instrument on a regular basis to keep the instrument looking nice and working well. Remove any dirt, dust, and grime whenever they become noticeable on the outside cover using a soft cloth moistened with a mild cleaning solution.
8 Service Information Warranty Service: Please go to the support and service section on our website www.bkprecision.com to obtain an RMA #. Return the product in the original packaging with proof of purchase to the address below. Clearly state on the RMA the performance problem and return any leads, probes, connectors and accessories that you are using with the device. Non-Warranty Service: Please go the support and service section on our website www.bkprecision.com to obtain an RMA #.
9 Limited One-Year Warranty B&K Precision Corp. warrants to the original purchaser that its products and the component parts thereof, will be free from defects in workmanship and materials for a period of one year from date of purchase. B&K Precision Corp. will, without charge, repair or replace, at its option, defective product or component parts. Returned product must be accompanied by proof of the purchase date in the form of a sales receipt. To obtain warranty coverage in the U.S.A.
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