B+K precision 9110 User manual

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Model: 9110, 9111
Multi Range DC Power Supply
USER MANUAL

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Safety Summary
The following safety precautions apply to both operating and maintenance personnel and must be
followed during all phases of operation, service, and repair of this instrument.
Before applying power to this instrument:
•Read and understand the safety and operational information in this manual.
•Apply all the listed safety precautions.
•Verify that the voltage selector at the line power cord input is set to the correct line
voltage. Operating the instrument at an incorrect line voltage will void the warranty.
•Make all connections to the instrument before applying power.
•Do not operate the instrument in ways not specified by this manual or by B&K Precision.
Failure to comply with these precautions or with warnings elsewhere in this manual violates the safety
standards of design, manufacture, and intended use of the instrument. B&K Precision assumes no
liability for a customer’s failure to comply with these requirements.
Category rating
The IEC 61010 standard defines safety category ratings that specify the amount of electrical energy
available and the voltage impulses that may occur on electrical conductors associated with these
category ratings. The category rating is a Roman numeral of I, II, III, or IV. This rating is also accompanied
by a maximum voltage of the circuit to be tested, which defines the voltage impulses expected and
required insulation clearances. These categories are:
Category I (CAT I): Measurement instruments whose measurement inputs are not intended to be
connected to the mains supply. The voltages in the environment are typically derived from a limited-
energy transformer or a battery.
Category II (CAT II): Measurement instruments whose measurement inputs are meant to be connected
to the mains supply at a standard wall outlet or similar sources. Example measurement environments
are portable tools and household appliances.
Category III (CAT III): Measurement instruments whose measurement inputs are meant to be connected
to the mains installation of a building. Examples are measurements inside a building's circuit breaker
panel or the wiring of permanently-installed motors.
Category IV (CAT IV): Measurement instruments whose measurement inputs are meant to be connected

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to the primary power entering a building or other outdoor wiring.
Do not use this instrument in an electrical environment with a higher category rating than what is
specified in this manual for this instrument.
You must ensure that each accessory you use with this instrument has a category rating equal to or
higher than the instrument's category rating to maintain the instrument's category rating. Failure to do
so will lower the category rating of the measuring system.
Electrical Power
This instrument is intended to be powered from a CATEGORY II mains power environment. The mains
power should be 120 V RMS or 240 V RMS. Use only the power cord supplied with the instrument and
ensure it is appropriate for your country of use.
Ground the Instrument
To minimize shock hazard, the instrument chassis and cabinet must be connected to an electrical safety
ground. This instrument is grounded through the ground conductor of the supplied, three-conductor AC
line power cable. The power cable must be plugged into an approved three-conductor electrical outlet.
The power jack and mating plug of the power cable meet IEC safety standards.
Do not alter or defeat the ground connection. Without the safety ground connection, all accessible
conductive parts (including control knobs) may provide an electric shock. Failure to use a properly-
grounded approved outlet and the recommended three-conductor AC line power cable may result in
injury or death.
Unless otherwise stated, a ground connection on the instrument's front or rear panel is for a reference
of potential only and is not to be used as a safety ground.
Do not operate in an explosive or flammable atmosphere

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Do not operate the instrument in the presence of flammable gases or vapors, fumes, or finely-divided
particulates.
The instrument is designed to be used in office-type indoor environments. Do not operate the
instrument
•In the presence of noxious, corrosive, or flammable fumes, gases, vapors, chemicals, or
finely-divided particulates.
•In relative humidity conditions outside the instrument's specifications.
•In environments where there is a danger of any liquid being spilled on the instrument or
where any liquid can condense on the instrument.
•In air temperatures exceeding the specified operating temperatures.
•In atmospheric pressures outside the specified altitude limits or where the surrounding
gas is not air.
•In environments with restricted cooling air flow, even if the air temperatures are within
specifications.
•In direct sunlight.
This instrument is intended to be used in an indoor pollution degree 2 environment. The operating
temperature range is 0 °C to 40 °C and the operating humidity range is ≤80% relative humidity with no
condensation allowed.
Measurements made by this instrument may be outside specifications if the instrument is used in non-
office-type environments. Such environments may include rapid temperature or humidity changes,
sunlight, vibration and/or mechanical shocks, acoustic noise, electrical noise, strong electric fields, or
strong magnetic fields.
Do not operate instrument if damaged
If the instrument is damaged, appears to be damaged, or if any liquid, chemical, or other material gets
on or inside the instrument, remove the instrument's power cord, remove the instrument from service,
label it as not to be operated, and return the instrument to B&K Precision for repair. Notify B&K
Precision of the nature of any contamination of the instrument.
Clean the instrument only as instructed

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Do not clean the instrument, its switches, or its terminals with contact cleaners, abrasives, lubricants,
solvents, acids/bases, or other such chemicals. Clean the instrument only with a clean dry lint-free cloth
or as instructed in this manual.
Not for critical applications
This instrument is not authorized for use in contact with the human body or for use as a component in a
life-support device or system.
Do not touch live circuits
Instrument covers must not be removed by operating personnel. Component replacement and internal
adjustments must be made by qualified service-trained maintenance personnel who are aware of the
hazards involved when the instrument's covers and shields are removed. Under certain conditions, even
with the power cord removed, dangerous voltages may exist when the covers are removed. To avoid
injuries, always disconnect the power cord from the instrument, disconnect all other connections (for
example, test leads, computer interface cables, etc.), discharge all circuits, and verify there are no
hazardous voltages present on any conductors by measurements with a properly-operating voltage-
sensing device before touching any internal parts. Verify the voltage-sensing device is working properly
before and after making the measurements by testing with known-operating voltage sources and test
for both DC and AC voltages. Do not attempt any service or adjustment unless another person capable
of rendering first aid and resuscitation is present.
Do not insert any object into an instrument's ventilation openings or other openings.
Hazardous voltages may be present in unexpected locations in circuitry being tested when a fault
condition in the circuit exists.
Fuse replacement
Fuse replacement must be done by qualified service-trained maintenance personnel who are aware of
the instrument's fuse requirements and safe replacement procedures. Disconnect the instrument from
the power line before replacing fuses. Replace fuses only with new fuses of the fuse types, voltage

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ratings, and current ratings specified in this manual or on the back of the instrument. Failure to do so
may damage the instrument, lead to a safety hazard, or cause a fire. Failure to use the specified fuses
will void the warranty.
Servicing
Do not substitute parts that are not approved by B&K Precision or modify this instrument. Return the
instrument to B&K Precision for service and repair to ensure that safety and performance features are
maintained.
Cooling fans
This instrument contains one or more cooling fans. For continued safe operation of the instrument, the
air inlet and exhaust openings for these fans must not be blocked nor must accumulated dust or other
debris be allowed to reduce air flow. Maintain at least 25 mm clearance around the sides of the
instrument that contain air inlet and exhaust ports. If mounted in a rack, position power devices in the
rack above the instrument to minimize instrument heating while rack mounted. Do not continue to
operate the instrument if you cannot verify the fan is operating (note some fans may have intermittent
duty cycles). Do not insert any object into the fan's inlet or outlet.
Do not short-circuit batteries
When using a DC load to discharge a battery, do not exceed the battery manufacturer's specified
maximum rate of discharge.
Use correctly sized wires
To connect the load to the power supply, use a wire diameter large enough to handle the maximum
continuous output short-circuit current of the power supply without the wire overheating.
For continued safe use of the instrument
•Do not place heavy objects on the instrument.
•Do not obstruct cooling air flow to the instrument.
•Do not place a hot soldering iron on the instrument.
•Do not pull the instrument with the power cord, connected probe, or connected test
lead.
•Do not move the instrument when a probe is connected to a circuit being tested.

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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. Please utilize your
local WEEE collection facilities in the disposition of this
product and otherwise observe all applicable requirements.

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CE Declaration of Conformity
The instrument meets the requirements of 2006/95/EC Low Voltage Directive and 2004/108/EC
Electromagnetic Compatibility Directive with the following standards.
Low Voltage Directive
-EN61010-1: 2001
EMC Directive
-EN 61000-3-2: 2006
-EN 61000-3-3: 1995+A1: 2001+A2: 2005
-EN 61000-4-2 / -3 / -4 / -5 / -6 / -11
-EN 61326-1: 2006

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Safety Symbols
CAUTION indicates a hazardous situation which, if not
avoided, could result in minor or moderate injury.
Chassis (earth ground) symbol.
On (Power)
Off (Power)
DANGER indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Safety instructions (or equivalent) signs indicate specific safety-
related instructions or procedures.

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Front Panel layout
Set Voltage indicator
Voltage value
Cursor position B or preset B is active
Cursor position A or preset A is active
Cursor position C or preset C is active
Cursor position D or preset D is active
Current value
Store voltage-ampere combination (Shift)
Move cursor left or store/recall
preset A values
Keyboard lock (Shift)
Enter or store/recall preset C values
CC mode indicator
CV mode indicator
OCP indicator
OVP indicator
Preset mode indicator
Keys locked indicator
Shift mode indicator
Output off indicator
Set Current indicator
Recall Preset values
Move cursor left or store/recall
preset B values
Enter OVP, OCP, preset mode
Toggle between Voltage/Current
setting or store/recall preset D
Display Voltage and Current setting
Output on/off
Secondary function key
knob
Air flow input
Main Power on/off
Output -
Ground

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Introduction
The 9110 and 9111 are unlike conventional power supplies with
fixed output ratings. They automatically recalculate voltage/current
limits for each setting, forming a constant power, hyperbolic shaped
boundary, as illustrated in the diagram below. Any Volt/Amp
combination that doesn’t exceed 100W, 60V or 5A (or 180W, 60V or
8A for 9111) can be set. By providing greatly expanded choices of
maximum power volt-ampere combinations, users can cut down on
the number of power supplies required and free up valuable bench
space.
Example (9110): When setting the voltage to
the maximum value of 60V, the max. current
value is 100W / 60V = 1.66A. For a 10V
setting, the max current is limited to 5A, in
which case the maximum output power is only
50W. A maximum output power of 100W is
possible for all V/A combination that lie on
the hyperbolic curve.
9110
9111

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Features
Digitally controlled, mixed linear/switching mode DC power supply
10mV/1mA resolution over the full range
Bright, easy to read display
Low ripple and noise
Very compact size and light weight
Output ON/OFF Control
High reliability due to OVP, OCP and OTP (over voltage, over
current, over temperature) protection
CV (Constant Voltage) and CC (Constant Current) operation
Store/Recall 100 groups with 4 sets of Volt/Amp memories each

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Installation
Please inspect the instrument mechanically and electrically upon receiving it. Unpack all items
from the shipping carton, and check for any obvious signs of physical damage that may have
occurred during transportation. Report any damage to the shipping agent immediately. Save the
original packing carton for possible future reshipment. Every instrument is shipped with the
following contents:
•1x 9110/9111 DC Power Supply
•1x User Manual
•1x AC Power Cord
Verify that all items above are included in the shipping container. If anything is missing, please
contact B&K Precision.
Input Power
The power supply has a universal AC input that accepts a line voltage with a nominal input of 110
V or 220 V AC.
Use the line voltage selector switch in the back to switch between 110 V and 220 V operation.
Disconnect all cables including the power cord from the instrument when changing the
instrument's line voltage. After changing the line voltage setting, ensure the instrument has fuses
of the proper ratings and types for the selected line voltage before applying line power.
Fuse Requirements
An AC input fuse is necessary when powering the instrument. Below is a table of the fuse
required for all models operating with either 110 VAC or 220 VAC input.
Model
Fuse Specification (110 VAC)
Fuse Specification (220 VAC)
9110
T 3.15 A, 250 V
T 2.50 A, 250 V
9111
T 5 A, 250 V
T 3.15 A, 250 V

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Fuse Replacement
Follow the steps below to replace or check the fuse.
1. Locate the fuse box next to the AC input connector in the rear panel.
2. With a small flat blade screwdriver, insert into the fuse box slit to pull and slide
out the fuse box as indicated below.
3. Check and replace fuse (if necessary) for the desired line voltage operation (see
Table 1).
Power-on procedure
Turn on the instrument by pressing the main power switch on the front panel
of the unit. The instrument will automatically revert to the last setting before
the power was turned off.
NOTE
The 9 pin D-sub connector in the rear is for factory use only!
This instrument does not offer a remote control interface.
Fuse box slit
Fuse
box
Check/Remove Fuse

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9110
100W Multi Range 60V/5A DC Power Supply CV CC
OVP OCP
V
A B C D Lock
Preset
OFF
Shift
A
V
A
Quick Start
Set Voltage
Set Voltage
Press the D V/A key to turn the “V” 9110
100W Multi Range 60V/5A DC Power Supply CV CC
indicator on. Now you can set the voltage
value. Use the cursor keys A B
OVP OCP
to highlight the desired digit then adjust
its value with the knob.
In this example the cursor is set to
A B C DLock Preset
OFF Shift
position Band the voltage value can be
adjusted in 1V increments.
cursor in B position
Set Current
Press the
D V/A
key to turn on the “A”
indicator. Now you can set the current
value. Use cursors A B
to highlight the desired digit then adjust
its value with the knob.
In this example the cursor is set to
position Aand the current value can be
adjusted in 1A increments.
cursor in A position
Set Current
Turn output On/Off
9110
Press On/Off to toggle the output between 100W Multi Range 60V/5A DC Power Supply CV CC
ON or OFF. The OFF LED is lit when
the output is turned off. Each time you
OVP OCP
press the On/Off key, the display will blink
A B C D
Lock Preset
for 3 seconds and the set value for Volts
and Amps is displayed. Afterwards, if
the instrument has been set to ON, the
actual output values for voltage and
current are displayed.
OFF Shift
Output OFF Indicator

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A
A
V
Cursor Position and Step Size
Cursor position
Voltage step size Current step size
A
1A
B1V 0.1A
C0.1V 0.01A
D0.01V 0.001A
Check the Set Voltage and Set Current Value
The power supply usually displays the actual voltage and current value. Press
Shift
twice to check the set value for voltage and current. The display will blink for 3
seconds while displaying the set values.
Key Lock Function
This function locks the keyboard to prevent unintended modification of power
supply settings. Press
Shift (Shift LED will be lit), followed by the C(Lock)
key. Now the keys and the knob are locked and the Lock LED is lit. Press the
Shift key followed by the Lock key again to disable the Lock function.
OVP Function
Press
Shift
then press and hold the 9110
100W Multi Range 60V/5A DC Power Supply
CV CC
D V/A (Setup) key for 3 seconds.
OVP OCP
Afterwards the LCD will display OVP
and you can adjust the OVP value using
A B C DVLock Preset
the cursor keys A B
knob.
and the
OFF Shift
OCP Function
After the OVP value is set, press C to
OVP Value
enter OCP mode. Use the cursor keys
9110
A B
OCP value.
Note
and the knob to set the 100W Multi Range 60V/5A DC Power Supply
A B C D
CV CC
OVP OCP
Lock Preset
The output of the power supply will
automatically turn off if the OVP and
OCP value are less than the actual
voltage and current value.
OCP Value
OFF Shift

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9110
100W Multi Range 60V/5A DC Power Supply CV
CC
OVP OCP
V
A B C D Lock
Prog
A
OFF
Shift
V
Key sound
Once the OCP value is set, press
C
to enter the BEEP mode. Use the knob
to turn the key sound ON or OFF.
9110
100W Multi Range 60V/5A DC Power Supply
A B C D
CV CC
OVP OCP
Lock Prog
Press
C
to confirm.
A OFF Shift
Set address
9110
100W Multi Range 60V/5A DC Power Supply
CV CC
Press
C
twice to skip the address
menu and advance to the group menu.
Note:
This setting is for factory use only and
can be ignored.
A B C D
V
Lock Prog
A OFF Shift
Selecting a Group Number
To enter this mode, you have to step
through the previous 4 modes first. From
9110
100W Multi Range 60V/5A DC Power Supply
CV CC
address mode, press
C
to enter group
OVP OCP
mode. Use the cursors A
B
and V
the knob to select a group number.
There are 100 groups, each group can store
Lock Preset
4 sets of voltage/current values. Press
C
to confirm the entry of the selected group
number.
A OFF Shift

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Storing Voltage/Current sets
Store up to four sets of voltage/current values to the group number assigned in the previous
paragraph. Press Shift followed by the
A
(Save) key. All 4 cursor LEDs A B C D
will blink simultaneously. Press one of the A
B
C D
V/A
keys to assign one of the 4 available memory location within this group. Proceed
accordingly for the other 3 sets.
Preset Mode
Press
Shift
followed by the
B
(Preset) key. The Preset LED will turn on to indicate
that the Preset mode is now active. The most recently selected group number will
automatically be activated. To activate the preset values from a different group, follow
the instructions in “Selecting a group number”. Press one of the A
B
C D
V/A
keys to recall one of the corresponding stored Volt/Amp sets assigned in the previous
step. In this mode, the cursor functionality of the A,B,C, D keys is disabled. To exit this
mode, press Shift then
B
(Preset).
Trouble shooting hints
If the output is disabled
1. Check if the voltage and current values are zero. If set to zero, set the voltage and
current value again.
2. Check if the OFF indicator is lit. If so, press the On/Off key to turn the output on.
3. Check if the OCP or OVP indicator is lit. If so, set the OVP or OCP value
appropriately.
If keys are disabled
Check the Lock LED. If it is lit, disable the Lock function.

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Specification
9110
9111
Output Rating
Voltage
0 – 60 V
0 – 60 V
Current
0 – 5 A
0 – 8 A
Power
100 W
180 W
Load Regulation
Voltage
< 0.01% + 3 mV
< 0.01% + 5 mV
Current
< 0.01% + 3 mA
< 0.01% + 5 mA
Line Regulation
Voltage
< 0.01% + 3 mV
< 0.01% + 5 mV
Current
< 0.1% + 3 mA
< 0.1% + 5 mA
Setting Accuracy
Voltage
< 0.05% + 10 mV
< 0.05% + 10 mV
Current
< 0.2% + 2 mA
< 0.3% + 5 mA
Readback
Accuracy
Voltage
< 0.05% + 10 mV
< 0.05% + 10 mV
Current
< 0.1% + 2 mA
< 0.3% + 5 mA
Ripple
Voltage
< 2 mVrms
< 5 mVrms
Current
< 5mArms
< 8mArms
Dimensions (WxHxD)
88 x 175 x 282 mm
AC Input
99V – 121V or 198V – 242V, Frequency: 47 – 63Hz
Weight (Approx.)
2.65 kg
3.5 kg
To ensure the most current version of this manual, please download the latest version here:
http://www.bkprecision.com/search/9110
For current up-to-date product information, please visit www.bkprecision.com

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SERVICE INFORMATION
Warranty Service: Please go to the support and service section on our website at www.bkprecision.com to obtain a
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 to the support and service section on our website at www.bkprecision.com to obtain a
RMA #. Return the product in the original packaging 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. Customers not on an
open account must include payment in the form of a money order or credit card. For the most current repair charges
please refer to the service and support section on our website.
Return all merchandise to B&K Precision Corp. with prepaid shipping. The flat-rate repair charge for Non-Warranty
Service does not include return shipping. Return shipping to locations in North America is included for Warranty Service.
For overnight shipments and non-North American shipping fees please contact B&K Precision Corp.
B&K Precision Corp.
22820 Savi Ranch Parkway
Yorba Linda, CA 92887
www.bkprecision.com
714-921-9095
Include with the returned instrument your complete return shipping address, contact name, phone number and
description of problem.