BK Precision BK Precision 1730A Manual
MODELS 1710A and 1730A
INSTRUCTION
MA
NUAL DE
INSTRUCCIÓN
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
MANUAL
MODELOS 1710A & 1730A
0-30V
DC POWER SUPPLY
0-1A (1710A)
0-3A (1730A)
FUENTE DE PODER DE DC
TEST INSTRUMENT SAFETY
WARNING
Normal use of test equipment exposes you to a certain amount of danger from electrical shock because testing must sometimes be
performed where exposed high voltage is present. An electrical shock causing 10 milliamps of current to pass through the heart will stop
most human heartbeats. Voltage as low as 35 volts dc or ac rms should be considered dangerous and hazardous since it can produce a
lethal current under certain conditions. Higher voltages are even more dangerous. Your normal work habits should include all accepted
practices to prevent contact with exposed high voltage, and to steer current away from your heart in case of ac cidental contact with a
high voltage. Observe the following safety precautions:
1. There is little danger of electrical shock from the dc output of this power supply. However, there are several other possible test
conditions using this power supply that can create a high voltage shock hazard:
a. If the equipment under test is the “hot chassis” type, a serious shock hazard exists unless the equipment is unplugged (just turning
off the equipment does not remove the hazard), or an isolation transformer is used.
b. If the equipment under test is “powered up” (and that equipment uses high voltage in any of its circuits), the power supply outputs
may be floated to the potential at the point of connection. Remember that high voltage may appear at unexpected points in
defective equipment. Do not float the power supply output to more than 100 volts peak with respect to chassis or earth ground.
c. If the equipment under test is “off” (and that equipment uses high voltage in any of its circuits under normal operation), discharge
high-voltage capacitors before making connections or tests. Some circuits retain high voltage long after the equipment is turned
off.
2. 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.
3. Don’t expose high voltage needlessly. Remove housings and covers only when necessary. Turn off equipment while making test
connections in high-voltage circuits. Discharge high-voltage capacit ors after removing power.
(continued on inside back cover)
1
Instruction Manual
for
Model
1710A and 1730A
DC POWER SUPPLY
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
2
TABLE OF CONTENTS
A
PPLICATIONS
................................
.............................
20
TEST INSTRUMENT SAFETY...................inside front cover
INTRODUCTION......................................................................4
FEATURES.................................................................................5
SPECIFICATIONS.....................................................................6
CONTROLS AND INDICATORS............................................8
OPERATING INSTRUCTIONS.............................................10
Safety Precautions................................................................10
Equipment Precautions.........................................................10
Hook-Up................................................................................10
Typical Constant Voltage Operation ...................................13
Setting Current Limit ...........................................................14
Typical Constant Current Operation...................................15
Constant Voltage/Constant Current Characteristic............16
Connecting Two Power Supplies in Series .........................16
Connecting Two Power Supplies in Parallel......................19
General..........................................................................20
Electronics Servicing...................................................20
Electronics Manufacturing..........................................20
Electronics Design Lab...............................................21
Electronics Education..................................................21
Battery Charging..........................................................21
MAINTENANCE.............................................................22
Fuse Replacement ........................................................22
Line Voltage Conversion, Internationa l Units........... 22
1710A/1730A Calibration...........................................23
Instrument Repair Service...........................................23
SPANISH MANUAL................................
3
.......................28
INTRODUCTION
The B+K Precision Model 1710A and 1730A DC Power Supplies are high quality, general purpose dc power sources. The two models
are very similar to each other, and both are covered in this instruction manual. Each of these power supplies provides 0-30 volts dc
output, adjustable with both coarse and fine controls for precise settability. The current output of the Model 1710A is 0-1 amp, while
Model 1730A is 0-3 amps. Two current ranges, High and Low, provide excellent current settability and meter resolution. Two large
panel-mounted meters continuously monitor the output voltage and cu rrent.
These power supplies exhibit excellent regulation and low ripple characteristics. The circuit design incorporates a pre-regulator, which
greatly reduces internal power dissipation at low output voltages. The styling is both attractive and functional. The mechanical
configuration conserves bench space and allows for easy portability.
These instrument may be used in constant voltage or constant current applications. The crossover from constant voltage to constant
current modes is smooth and automatic. LEDs indicate the “CV” (constant voltage) or “CC” (constant current) mode of operation. In
constant voltage applications, a current limit may be preset. When load variations cause the current to reach the preset limit, the unit then
regulates output current rather than output voltage. Current limits are adjustable from 5% to 100% of maximum. In constant current
applications, the maxi mum voltage may be preset. When load variations cause current to drop below the regulated value, the unit reverts
to regulated voltage operation at the preset value.
Reverse polarity protection prevents accidental damage to the power supply from improper connection to an external voltage, and
current limiting protects the equipment being powered, as well as the power supply.
The output is isolated from chassis and earth ground, which permits full flexibility of connections. When needed, the (+) or (-) polarity
may be strapped to ground, or either polarity may be floated to an external voltage. Two supplies may be connected in series as a 0 -to-60
volt power source, or two supplies may be connected in parallel, with suitable balancing resistors, for up to twice the output current.
These power supplies are well suited for a wide variety of electrical and electronics applications, including service shops, engineering
labs, production testing, school laboratories, and home use by hobbyists.
4
0-30 VOLTS
BUILT
-
IN METERING
controls.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
Continuously variable over 0-to-30 volt range with coarse
and fine controls.
0-1 AMP AND 0-3 AMP VERSIONS
0 to 1 amp (1710A) and 0 to 3 amp (1730A) models
available. Each rated for continuous duty at full output
current.
LABORATORY QUALITY
Excellent regulation, low ripple.
FEATURES
Two large, easy-to-read meters continuously monitor output
voltage and current.
LED INDICATORS
Act as pilot light and identify mode of operation.
PRE-REGULATOR
Limits internal dissipation for higher reliability.
ISOLATED OUTPUT
Either polarity may be floated or grounded.
CONSTANT VOLTAGE OR CONSTANT CURRENT
TWO CURRENT RANGES
Provides regulated dc voltage output or regulated dc
current output. Crossover is smooth and automatic.
High-Low switch selects full output (0-1A for Model
1710A, 0-3A for Model 1730A), or partial output (0-.25A
for Model 1710A, and 0-.5A for Model 1730A). Low
range improves current stability and meter resolution at
lower current values. Switch simultaneously selects range
of adjustment and corresponding meter scale.
OVERLOAD PROTECTION
Fully adjustable current limiting (from 5% to 100% of
maximum output current) protects circuit under test and the
power supply.
REVERSE POLARITY PROTECTION
Prevents damage to power supply from external voltage of
reverse polarity.
STYLING
Modern functional styling. Configuration conserves bench
space and aids portability. Logical, convenient layout of
5
SPECIFICATIONS
Model 1730A Model 1710A
OUTPUT VOLTAGE 0 to 30 VDC, coarse and fine adjustment 0 to 30 VDC, coarse and fine adjustment
OUTPUT CURRENT
High Range
Low Range
CONSTANT VOLTAGE OPERATION
Voltage Regulation
Line (108 - 132V)
Load (no load to full load)
0 to 3A
0 to 0.5A
0.01% + 3mV
0.01% + 3mV
0 to 1A
0 to 0.25A
0.01% + 3 mV
0.01% + 3 mV
Recovery Time
Ripple Voltage
Peak-to-Peak
RMS
Temperature Coefficient
0° to +40° C
CONSTANT CURRENT OPERATION
Adjustable Current Limits
Current Regulation
Line (108 - 132V)
Load
Current Ripple
100µs typical
2mV typical
1mV
300 PPM/°C
5 to 100%
0.2% + 3mA
0.2% + 3mA
3mA typical
100µs typical
3mV typical
1mV
300 PPM/°C
5 to 100%
0.2% + 3mA
0.2% + 3mA
3mA typical
6
Model 1730A Model 1710A
METERING
Voltmeter
Range
Accuracy
Ammeter
High Range
Low Range
Accuracy
POWER REQUIREMENTS Domestic: 120 VAC ±10%, 60 Hz
POWER CONSUMPTION Approx. 180W or less at full load Approx. 70W or less at full load
PROTECTION Reverse polarity protection,
TEMPERATURE RANGE
Operation
Storage
DIMENSIONS (HxWxD) 6.2 x 5.5 x 12.5" 6.2 x 5.5 x 12.5"
WEIGHT 10.5 lb. 8 lb.
ACCESSORIES SUPPLIED Spare Fuse
NOTE: Specifications and information are subject to change without notice.
0 to 32V
±2.5%
0 to 3.2A
0 to 0.53A
±2.5%
International: 120, 220, 230, 240 VAC ±10%, 50/60 Hz
Current limiting
0° to +40° C, <75% R.H.
-15° to +70°C, <85% R.H.
Instruction Manual
0 to 32V
±2.5%
0 to 1.04A
0 to 0.26A
±2.5%
Reverse polarity protection,
Current limiting
0° to +40° C, <75% R.H.
-15° to +70°C, <85% R.H.
Spare Fuse
Instruction Manual
7
current range: value is read on bottom meter scale of
A
meter.
POWER CONTROLS
INDICATORS
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
CONTROLS AND INDICATORS
Either the “CC” or “CV” indicator will be lighted whenever
the unit is operating, thus serving as a pilot light. The unit
automatically changes from CV to CC operation when the preset
current limit is reached.
1. C.C. (Constant Current) Indicator. Red LED lights in
constant current mode. Unit regulates output current at
value set by CURRENT controls.
2. C.V. (Constant Voltage) Indicator. Green LED lights in
constant voltage mode. Unit regulates output voltage at
value set by VOLTAGE controls.
VOLTAGE CONTROLS
3. Coarse Control. Coarse adjustment of output voltage. Read
value on V meter.
4. Fine Control. Fine adjustment of output voltage. Read
value on V meter.
CURRENT CONTROLS
5. CURRENT Control. Adjusts current limit in constant
voltage mode. Adjusts constant current value in constant
current mode. Range of adjustment is determined by High Low switch.
6. High-Low Switch. High position selects high current range;
value is read on top meter scale of A meter. Low position
selects low
RANGE MODEL 1730A MODEL 1710A
High 0 to 3A 0 to 1A
Low 0 to 0.5A 0 to 0.25A
7. ON-OFF Switch.
OUTPUT TERMINALS
8. “+” Terminal (Red). Positive polarity output terminal.
9. Terminal (Green). Earth and chassis ground.
10. “-” Terminal (Black). Negative polarity output terminal.
METERS
11. A Meter. Reads output current in amperes. Use top scale
when High-Low switch is set to High, bottom scale
when switch is set to Low.
12. V Meter. Reads output voltage on 0 to 32V scale.
REAR PANEL CONTROLS
13. Fuse.
14. Power Cord.
15. 110/220 Line Voltage Conversion Switch.
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