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Related Manuals for BK Precision 1747
Summary of Contents for BK Precision 1747
- Page 1 Model 1747 Dual Range DC Power Supply INSTRUCTION MANUAL...
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Page 3: Safety Summary
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. - Page 4 WARNING and CAUTION statements, such as the following examples, denote a WARNINGS AND CAUTIONS 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.
- Page 5 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...
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Page 6: Table Of Contents
Contents Safety Summary ............1 Introduction ..............5 Quick Reference ............6 Front Panel ..................6 Rear Panel ..................7 Operating Instructions ..........8 Instrument Hook-Up ................9 Typical Constant Voltage Operation ..........11 Setting Current Limit ................ 12 Typical Constant Current Operation ..........12 Constant Voltage/Constant Current Characteristic ...... -
Page 7: Introduction
The 1747 provides 0-60 V DC output, adjustable with both coarse and fine voltage controls for precise setting. The current output for the 1747 is 0-10 A for the 0-35 V range, and 0-5 A for the 35-60 V range, adjustable with both coarse and fine current controls. -
Page 8: Quick Reference
Quick Reference 3.1 Front Panel Figure 1 - Front Panel INDICATORS Either the CC or CV LED indicators will be lit whenever the unit is operating. The unit automatically changes from CV to CC operation when the preset current limit is reached. -
Page 9: Rear Panel
CURRENT CONTROL 7) Current Coarse Control. Coarse adjustment of current limit. Read value on the red LED display. 8) Current Fine Control. Fine adjustment of current limit. Read value on the red LED display. POWER CONTROLS Power ON-OFF Switch. 10) Output ON-OFF Switch. OUTPUT TERMINALS 11) “-”... -
Page 10: Operating Instructions
Operating Instructions Safety Precautions Use only a polarized 3-wire AC outlet. This assures that the power supply chassis, case, and ground terminal are connected to a good earth ground and reduces danger from electrical shock. There is little danger of electrical shock from the power supply output, which produces a maximum of 60 volts dc. -
Page 11: Instrument Hook-Up
4.1 Instrument Hook-Up 1. Turn off the power supply and the equipment to be powered during hook- 2. Connect the positive polarity of the device being powered to the red (+) terminal of the power supply. 3. Connect the negative polarity of the device being powered to the black (-) terminal of the power supply. - Page 12 Figure 3 (A and B) - Grounding Possibilities Figure 3 (C and D) - Grounding Possibilities...
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Page 13: Typical Constant Voltage Operation
4.2 Typical Constant Voltage Operation 1. Before connecting the device to be powered to the power supply, determine the maximum safe load current for the device to be powered and set the current limit value (see Setting Current Limit procedure in this section). 2. -
Page 14: Setting Current Limit
4.3 Setting Current Limit 1. Determine the maximum safe current for the device to be powered. 2. Adjust the coarse and fine current control for the desired current limit. Read the current value on the current LED display. Wait 3 seconds. 3. -
Page 15: Constant Voltage/Constant Current Characteristic
Increase the coarse and fine current control setting until the desired constant current value is read on the display, or set the current limit in advance (before connecting the load) as described earlier in the Setting Current Limit procedure. If the load current drops below the constant current value, the CC indicator will go off and the CV indicator will light. -
Page 16: Saving The Power Supply's Current State
constant as the load current 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 current. The crossover point is indicated by the front panel LED indicators. -
Page 17: Connecting Two Power Supplies In Series
4.7 Connecting Two Power Supplies in Series Two power supplies may be connected in series to provide a variable 0-120 V output. In this configuration, the two power supplies can supply up to 60 V-10 A or 120 V-5 A. Figure 8 for the connection scheme. - Page 18 Figure 9 Current equalizing resistors must be used as shown in . However, the protective current limiting feature will prevent damage if current is temporarily unbalanced during set-up. When connected in parallel and operating in the constant voltage mode, determine the total load current limit and preset the current limiting for each power supply to half the total load current value.
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Page 19: Remote Operation
The power supply can be connected to the RS232 interface using the 9-pin (DB-9) serial connector on the rear panel. The 1747 uses a null modem RS232 cable. The cable pin diagram for the DB-9 connector is shown in the picture below:... -
Page 20: Rs232 Configuration Overview
5.1 RS232 Configuration Overview Baud Rate 9600 bps Parity Bits none Data Bits Start Bits Stop Bits Flow Control Xon / Xoff Termination Character Table 1 - RS232 Configuration 5.2 RS232 Commands NOTE: All commands are case sensitive and must be capitalized. 1.VOLT xx.xx<CR>... - Page 21 Example: The output current is set at 300 mA. CURR 0.300<CR> 3. SAVE<CR> The programmed values of the output current and voltage are saved. If the power supply is restarted, the values of the output current and voltage will be those previously saved. If the Output On-Off button is pressed at power on, then the power supply will start with Output Off state regardless of the previously saved state.
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Page 22: Application Software
B+K PRECISION 1747 Revision x.x<CR> Application Software Remotely control your 1747 using B&K Precision’s application software, available for download at www.bkprecision.com. This software provides a virtual front panel and a simple data logging function to store and log data to a text or CSV file. RS232... -
Page 23: Maintenance
Maintenance WARNING The following instructions are for use by qualified personnel only. To avoid electrical shock, do not perform any servicing other than contained in the operating instructions unless you are qualified to do so. 6.1 Fuse Replacement If the fuse blows, the CV or CC indicators will not light and the power supply will not operate. -
Page 24: Adjustments
6.2 Adjustments This unit was accurately adjusted at the factory before shipment. Readjustment is recommended only if repairs have been made in a circuit affecting adjustment accuracy, or if you have a reason to believe the unit is out of adjustment. However, adjustments should be attempted only if a multimeter with an accuracy of ±0.02% DCV or better is available (B&K Precision Model 5491B or equivalent). - Page 25 The power supply will enter in calibration mode and will display: Voltage display: C A L Current display: U 0 You can browse the calibration menu by turning the current coarse knob. Using the voltage coarse knob you can select one of the following calibration procedures: U 0 Zero voltage calibration U F Full voltage calibration...
- Page 26 Use the current coarse and fine knobs to adjust the value displayed by the power supply until the voltmeter indicates the closest value to 0V. d) Press the Output On-Off button to finish the calibration. While performing the zero voltage calibration, the current display will show Adc.
- Page 27 4. Low current calibration a) Select “I 0” for low current calibration and press the Output On-Off button. When you initiate the low current calibration, the CV LED lights up and the power supply will display: Voltage display: I Current display: ConA b) Connect a digital ammeter (B&K Precision 5491B or similar instrument) to the output terminals of the power supply to initiate the low current calibration procedure.
- Page 28 Voltage display: I Current display: ConA b) Connect a digital ammeter (BK Precision 5491B or similar instrument) to the output terminals of the power supply to initiate the full current calibration procedure. If a digital ammeter is not connected within 30 seconds, the power supply will abandon the current calibration procedure and will return to the Calibration menu.
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Page 29: Instrument Repair Service
6. Leaving the calibration menu a) Turn off the power supply. b) When turned on, the power supply will have the same parameters programmed and saved before the calibration procedure. 6.4 Instrument Repair Service Because of the specialized skills and test equipment required for instrument repair and calibration, many customers prefer to rely upon B&K Precision for this service. -
Page 30: Calibration Errors
Er 07: ADC not ready Er 08: No reference voltage Er 09: ADC conversion error Er 10: ADC AVdd< 3.0V Er 11: ADC AVdd> 3.6V Er 12: Calibration constants checksum failed 7.2 Calibration Errors Zero voltage calibration errors Er 20: CC not high Er 21: CV not low Er 22: DAC out of range Er 23: ADC out of range... -
Page 31: Command Errors
Full current calibration errors: Er 50: CC not low Er 51: CV not high Er 52: DAC out of range Er 53: ADC out of range Er 54: ADC system calibration failed Er 55: DAC full current constant checksum failed Er 56: ADC full current constant checksum failed 7.3 Command Errors “Communication Error<CR>”... -
Page 32: Specifications
Specifications 1747 Output Ratings ( 0 °C~40 °C) 0-60 V Voltage 0-10 A (0-35 V), Current 0-5 A (35-60 V) Load Regulation ±(% of output+offset) 0.01% + 5 mV Voltage 0.2% + 3 mA Current Line Regulation ±(% of output+offset) 0.01% + 3 mV... - Page 33 NOTE: All specifications apply to the unit after a temperature stabilization time of 30 minutes. Specifications and information are subject to change without notice. To ensure the most current version of this manual, please download the current version here: http://www.bkprecision.com/search/manual/1747 For current up-to-date product information, please visit www.bkprecision.com...
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Page 34: Service Information
Service Information Warranty Service: Please go to the support and service section on our website at 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. -
Page 35: Limited Two-Year Warranty
10 Limited Two-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 two years from date of purchase. B&K Precision Corp. will, without charge, repair or replace, at its option, defective product or component parts. - Page 36 (Page intentionally left blank)
- Page 37 22820 Savi Ranch Parkway Yorba Linda, CA 92887 www.bkprecision.com © 2011 B&K Precision Corp. Printed in Taiwan v063011...
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