B&K Precision 9130C, 9131C, 9132C User manual

i

9130C Series
Triple Output Programmable DC Power
Supplies

Models: 9130C, 9131C, 9132C

USER MANUAL

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ii

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 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

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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

Do not operate the instrument in the presence of flammable gases or vapors, fumes, or finely­divided 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

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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 up to 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

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

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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 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.

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Use correctly sized wires

To connect a 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

This 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

Refer to the user manual for warning information
to avoid hazard or personal injury and prevent
damage to instrument.

Electric Shock hazard

( )

On (Supply). This is the AC mains
connect/disconnect switch on the front of the
instrument.

( )

Off (Supply). This is the AC mains
connect/disconnect switch on the front of the
instrument.

Direct current

Alternating current

Fuse Symbol

Chassis (earth ground) symbol

Ground terminal

Protective earth ground

CAUTION indicates a hazardous situation which, if
not avoided, will result in minor or moderate injury

WARNING indicates a hazardous situation which, if
not avoided, could result in death or serious injury

DANGER indicates a hazardous situation which, if
not avoided, will result in death or serious injury.

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Table of Contents

Compliance Statements ............................................................................................................. vii

Safety Symbols ............................................................................................................................ ix

1 General Information ..................................................................................... 1

1.1 Product Overview ............................................................................................................. 1

1.2 Package Contents ............................................................................................................. 1

1.3 Product Dimensions ......................................................................................................... 2

1.4 Rackmount Installation..................................................................................................... 3

1.5 Front Panel Overview ....................................................................................................... 5

1.6 Rear Panel Overview ........................................................................................................ 6

1.7 Keypad Overview .............................................................................................................. 7

1.8 Display Overview .............................................................................................................. 8

2 Getting Started ............................................................................................. 9

2.1 Input Power and Fuse Requirements ............................................................................... 9

2.2 Fuse Requirements ......................................................................................................... 10

2.3 Line Voltage Selection .................................................................................................... 10

2.4 Output Connections ....................................................................................................... 12

2.5 Carrying handle Adjustment .......................................................................................... 13

2.6 Preliminary Check ........................................................................................................... 14

3 Front Panel Operation ................................................................................ 16

3.1 Check Model and Firmware Version .............................................................................. 16

3.2 Output Control ............................................................................................................... 16

3.3 Meter Mode ................................................................................................................... 17

3.4 Setting Voltage and Current ........................................................................................... 17

3.5 Over Voltage Protection (OVP) ....................................................................................... 18

3.6 Save/Recall Instrument Settings ..................................................................................... 18

3.7 Key Lock .......................................................................................................................... 19

3.8 Output Check .................................................................................................................. 19

4 Menu Access and Options .......................................................................... 21

4.1 How to Access the Menu................................................................................................ 21

4.2 Menu Options ................................................................................................................. 21

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4.3 Output Power-on State .................................................................................................. 22

4.4 Output Parameters ......................................................................................................... 22

4.5 Lock/Unlock Rotary Knob ............................................................................................... 22

4.6 Buzzer On/Off ................................................................................................................. 23

4.7 Communication .............................................................................................................. 23

4.8 Memory Group ............................................................................................................... 24

4.9 Protocol .......................................................................................................................... 24

4.10 Return Meter .................................................................................................................. 24

4.11 System Menu .................................................................................................................. 25

4.12 Combined Series and Parallel Modes ............................................................................. 26

4.13 Tracking Mode ................................................................................................................ 29

4.14 Parameters in Series/Parallel Mode ............................................................................... 30

4.15 Over Temperature Protection ........................................................................................ 30

4.16 Remote Sense ................................................................................................................. 30

5 Remote Operation ...................................................................................... 32

5.1 Interface Configuration .................................................................................................. 32

6 Remote Commands .................................................................................... 34

7 Troubleshooting Guide ............................................................................... 34

8 Specifications ............................................................................................. 36

9 Calibration .................................................................................................. 37

10 SERVICE INFORMATION ............................................................................ 38

11 LIMITED THREE-YEAR WARRANTY ............................................................ 38

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1 General Information

1.1 Product Overview

The 9130C Series programmable triple output DC power supplies feature isolated outputs that
can be adjusted independently. They can be configured for series or parallel mode when
connecting multiple channels together. The front panel keys and the rotary knob provide a
convenient means for setting values and adjusting parameters. Built-in memory supports
storing and recalling user settings without the need to connect to an external PC. A wide range
of interface options enables remote controllability from a PC.

Features:

• 3 independent, fully programmable and electrically isolated outputs

• Front and rear panel output terminals

• Remote Sense on all channels

• Display Voltage and Current of all 3 channels simultaneously

• RS232 and USB remote interfaces

• Series, parallel, and tracking modes

• Output timer function (0.1 - 99999.9 seconds)

• Store/recall up to 36 instrument settings

• Bright and easy to read display (VFD technology)

• OVP, OTP Protection

• Compact half-rack 2U form factor

1.2 Package Contents

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 power supply is shipped with the
following contents:

• 1 x 9130C, 9131C, or 9132C Power Supply

• 1 x AC Power Cord

• 1 x Certificate of Calibration

Verify that all items above are included in the shipping container. If anything is missing, please
contact B&K Precision.

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1.3 Product Dimensions

The 9130C power supply’s dimensions are approximately 214.5 mm (8.44 in) x 88.2 mm (3.47
in) x 354.6 mm (13.96 in) (W x H x D). The 9131C and 9232C power supply’s dimensions are
approximately 214.5 mm (8.44 in) x 88.2 mm (3.47 in) x 445 mm (17.52 in) (W x H x D).

Note: All dimensions in the figures below are measured in millimeters (mm).

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1.4 Rackmount Installation

The instrument can be installed in a standard 19-inch rack using the optional IT-E151 rackmount
kit. Below is an image of a 9130C Series model installed with the IT-E151 rackmount kit.

Note: Remove the carrying handle and the two plastic ears before mounting the instrument. To
remove the handle, grasp the handle by its sides, pull outwards, and rotate it until the arrow on
the handle and the arrow on the plastic ears are in opposite directions. Then pull the handle
outward. After removing the handle, you can use a screwdriver to remove the two plastic ears.

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To rackmount a single instrument, order rackmount kit IT-E151

To rackmount two instruments side-by-side, order rackmount kit IT-E151 and remove the

front panel cover

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1.5 Front Panel Overview

Figure 1 - Front Panel

Front Panel Description

VFD display

Shift key

Local key

Power key

Numeric keys

Function keys

Cursor keys

Output terminals

Rotary knob

1 2 3 4 5 6 7 8 9

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1.6 Rear Panel Overview

Figure 2 - Rear Panel

Rear Panel Description

Cooling fan

Remote sense terminal

AC power input receptacle & fuse box

RS-232 interface

USB interface

1 2 3 4 5

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1.7 Keypad Overview

Figure 3 - Keypad

Keypad Description

Shift key

Enables access to secondary functions (Labeled in blue)

Local key

Sets the instrument back to local mode.

Power key

Power on the instrument.

~

Numeric keypad

Enters numeric values for various parameters.

V-set / OVP button

Configures output voltage or sets the overvoltage protection point for the
power supply.

I-set / Menu button

Configures output current or allows access to the power supply menu
settings.

Recall / Save button

Saves and recalls instrument settings.

Meter

Switches from set value display to measured output value display.

Enter

Confirms setting

Output / Lock button

Controls output On/Off state of the power supply or used to lock the front
panel buttons.

Left/Right arrow keys

Adjusts cursor position or select menu items.

Up/Down arrow keys

Used to select menu items or increase/decrease output voltage or current
values.

Esc key

Cancel and return to previous menu.

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1.8 Display Overview

Figure 4 - Display

Display Description

Indicates output is off

Indicates constant voltage mode

Indicates constant current mode

Indicates the shift button is pressed

Tracking mode enabled

Indicates remote mode

Keyboard lock enabled

Indicates the channel currently selected

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2 Getting Started

Before connecting and powering up the instrument, please review and go through the
instructions in this chapter.

2.1 Input Power and Fuse Requirements

The supply has a selectable AC input that accepts line voltage input within:

Voltage: 110 V (+/- 10 %) or 220 V (+/- 10 %)
Frequency: 47 Hz – 63 Hz

Before connecting to an AC outlet or external power source, be sure that the power switch is in
the OFF position and verify that the AC power cord, including the extension line, is compatible
with the rated voltage/current and that there is sufficient circuit capacity for the power supply.
Once verified, connect the cable firmly.

The included AC power cord is safety certified for this
instrument operating in rated range. To change a
cable or add an extension cable, be sure that it can
meet the required power ratings for this instrument.
Any misuse with wrong or unsafe cables will void the
warranty.

SHOCK HAZARD:

The power cord provides a chassis ground through a
third conductor. Verify that your power outlet is of the
three-conductor type with the correct pin connected
to earth ground.

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2.2 Fuse Requirements

An AC input fuse is necessary when powering the instrument. The below table shows the fuse
required for all models operating with either 110V AC or 220V AC input.

Table 2.1 - Fuse Table

Model

Fuse Specification (110V AC)

Fuse Specification (220V AC)

9130C

6.3A 250V

3.15A 250V

9131C

10A 250V

5A 250V

9132C

10A 250V

5A 250V

2.3 Line Voltage Selection

The power supplies can be selected to operate with 110 V input or 220 V input. To ensure that
your instrument is properly configured to operate at the desired AC line voltage, please follow
the steps below:

For safety, no power should be applied to the
instrument while changing line voltage operation.
Disconnect all cables connected to the instrument
before proceeding.

Step 1 - Check and/or Change Fuse

- Locate the fuse box next to the AC input connector in the rear panel (see Figure 2)

- With a small flat blade screwdriver, insert into the fuse box slit to pull and slide out the fuse

box as indicated below.

- Check and replace fuse (if necessary) for the desired line voltage operation (see Table 2.1 -

Fuse Table).

Figure 5 - Fuse replacement

Fuse box slit

Fuse box

Check/Remove Fuse

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Step 2 - Check and/or Change Line Voltage Switch

- Locate the Line Voltage Switch, which has markings that indicate “110” for 110V or “220” for
220V line operation. Depending on the model, the Line Voltage Switch will be located either on
the rear or bottom of the instrument. Set the switch to the desired line voltage operation.

Figure 6 - Line Voltage Switch Location

Do not connect power to the instrument until the line
voltage selection is setup correctly. Applying an
incorrect line voltage or configuring the line voltage
selection improperly may damage the instrument and
void all warranty.

Any disassembling of the case or changing the fuse
not performed by an authorized service technician
will void the warranty of the instrument.

Line Voltage Switch

Rear Panel

Front Panel

(Bottom View)

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2.4 Output Connections

The main DC output terminal is a binding post terminal on the front panel.

Before connecting wires to the output terminals, turn
OFF the power supply to avoid damage to the
instrument and the device under test (DUT). For
safety, load wires must have a wire gauge size large
enough to prevent overheating when the power
supply operates at maximum short circuit output
current. It will also prevent large voltage drops from
resistances in the wires.

SHOCK HAZARD:

Hazardous voltages may exist at the outputs and the
load connections when using a power supply with a
rated output greater than 40V. To protect personnel
against accidental contact with hazardous voltages,
ensure that the load and its connections have no
accessible live parts. Ensure that the load wiring
insulation rating is greater than to the maximum
output voltage of the power supply.

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2.5 Carrying handle Adjustment

To adjust the position, grasp the handle by the sides and pull outward. Then rotate the handle
to the desired position.

Bench operation

Handle transport position

Be sure the handle is locked in position and avoid
twisting movements while transporting as the handle

can damage and drop the power supply.

Figure 7 - Carrying Handle

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2.6 Preliminary Check

Complete the following steps to verify that the power supply is ready for use.

1. Verify AC Input Voltage

Verify and check to make sure proper AC voltages are available to power the instrument.
The AC voltage range must meet the acceptable specification as explained in “2.1 Input
Power and Fuse Requirements”.

2. Connect Power and Self-Test

Connect AC power cord to the AC receptacle in the rear panel and press the power
switch to the |( ) ON position to turn ON the instrument. It will run through a self­test procedure.

After power on, during the self-test, the following should be displayed on the VFD:

Figure 7 - Scan System

After the Scan System is complete the VFD will display as shown in Figure 9.

Figure 9 - Scan Complete

Note: The initial power on state is based on the settings
in the (Config) configuration menu.

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Self-test Errors

The following errors will be displayed if the self-test did not complete successfully:

Error Message on Display

Description

EEPROM Fail

The internal EEPROM is corrupted or damaged.

System Lost

Last system settings within the EEPROM are lost.

Model Fail

Channel response failure.

Cal Lost

Calibration data within the EEPROM is lost.

Fact Loss

Factory calibration data is lost.

Model Lost

Channel initialization failed.

If any of these errors occur, please contact B&K Precision.

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3 Front Panel Operation

At power-on, the power supply will automatically enter the front-panel operation mode and the
instrument can be controlled via the front panel keys and knob.

The power supply enters remote mode as soon as a valid remote command is received via the
selected communication interface in the rear panel. The VFD also displays a “ ” symbol in the

lower left to indicate remote mode. Switching to remote mode does not impact the supply’s
output parameters. In remote mode, front-panel operation is disabled. Only Meter and Local

buttons are enabled. If the power supply is in remote mode and the key is enabled, you

can revert to manual mode by pressing the key.

The power supply is in Meter mode when it is powered on. In this mode, the VFD will display the
output voltage and current.

The output of the power supply can be enabled/disabled from the front panel by pressing the

button. When output is enabled, the supply will display the state and voltage/current of

each channel. ” ” represents constant current mode. ” ” represents constant voltage mode.
This is indicated for each channel independently. When output is disabled, the VFD will display
<OFF> for each channel if the supply is in Meter mode. If the supply is not in Meter mode, I-SET
current settings of each channel will be displayed.

3.1 Check Model and Firmware Version

The firmware version, model, and serial number can be verified by pressing the followed

by Info . This information can also be acquired by using the *IDN? remote command via
any of the remote interfaces connected to a computer.

3.2 Output Control

Pressing the button toggles the output state of all 3 channels of the power supply.

To control the output state of each channel individually, press , , or for
channels 1, 2, or 3 respectively.

1

2

3

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3.3 Meter Mode

The power supply can display the set voltage and current values or the measured voltage and

current readings. Press the button to toggle between displaying settings and measured

readings. When the button is illuminated, the display shows the measured voltage and
current readings. When it is not illuminated, the display shows the set voltage and current
values.

3.4 Setting Voltage and Current

Follow the steps below to set the output voltage or current. The values can be entered using the
numeric keypad, rotary knob or the Up/Down arrow keys .

1. Using the keypad: Press key to select channel (selected channel is indicated by

), press (for voltage) or (for current) and the button will illuminate.

Then enter a numerical value on the keypad followed by .

2. Using the rotory knob: Press key to select channel (selected channel is indicated

by ), press (for voltage) or (for current), then press to move
the cursor position and adjust the voltage or current value using the rotory knob.

3. Using the Up/Down arrows: Press key to select channel (selected channel is

indicated by ), press (for voltage) or (for current),then press
to move the cursor position and adjust the voltage or current value using .

Note: To see the voltage and current setting changes, make sure the instrument is not
displaying in meter mode ( button is not illuminated in this mode). See 4.10

Return Meter for more information on this mode.

When output is ON, the user can use the rotary knob to adjust the voltage value when the
output is in constant voltage mode. The same can be done to adjust the current value when
output is in constant current mode.

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3.5 Over Voltage Protection (OVP)

Over voltage protection can be set for each channel. Follow the steps below.

1. Press key to select the channel.

2. Press followed by the button. The display will show OVP Set and OFF ON

options below.

3. Use the keys to select OFF or ON to disable or enable OVP for the selected channel.

4. Press and the display below OVP Set will indicate the OVP voltage limit.

5. Use the numeric keypad, rotary knob or the Up/Down arrow keys to change the

desired voltage limit, then press to confirm the changes.

6. Repeat the above steps for setting each channel.

When OVP protection is tripped during operation, the output will turn off and the power supply
will display OVER VOLT. To clear the trip status, press any key once.

Note: Avoid exceeding 120% of the rated voltage across the output terminals or it will

damage the power supply.

3.6 Save/Recall Instrument Settings

Up to 36 instrument settings can be saved/recalled from the instrument’s internal memory. The
settings that can be saved/recalled are set voltage, set current, OVP settings, and maximum
voltage limit settings.

Save Settings

1. Configure the settings you want to save and press key and button to enter

Save mode.

2. The button will flash on and off until a Save location value is entered.

3. Use the numeric keypad to enter the memory location between 1 and 9. Once the

location number is entered, the power supply will display Save Data Done! and return to
normal operation.

4. To save more than 9 settings, refer to “4.8 Memory Group”.

5. To exit Save mode at any time, press key.

Recall Settings

1. Press button to enter Recall mode. The button will be illuminated.

2. Use the numeric keypad to enter the memory location between 1 through 9 to recall

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saved settings from that location. If the selected memory location does not have any
saved settings, the message Recall Data Empty! will be displayed.

Note: When in Recall mode, users can recall settings from different locations without
having to press additional keys each time. For example, you can press 1 to recall
settings in location 1, and then press 5 to immediately recall settings in location 5.

3. To exit Recall mode at any time, press the button again or press .

3.7 Key Lock

The front panel keys can be locked to prevent unwanted changes to output settings and power
supply configurations. Follow the steps below to enable/disable key lock.

1. Press the key and the button. A Lock indicator will light up on the

display, indicating that the front panel keys are locked. At this point, all keys are disabled

except for the key, button and button.

2. To unlock the keys, press the key and button again. The Lock indicator

will disappear and all keys will be enabled.

3.8 Output Check

Voltage Check

Follow the steps below to check the voltage output with no load connected.

1. Turn on the power supply. The display should look like the following.

Figure 10 - Voltage Check

2. Enable the output by pressing ; the button will illuminate. The < >will be

replaced with a numeric value and a next to this value for each channel.

3. Press the button if it is illuminated to enter the settings mode.

4. Press first, and then a numeric value on the keypad and then press the

button.

Note: The button will automatically return to meter mode and illuminate
after 5 seconds of a valid entry (see 4.10 Return Meter to disable this).

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5. If the button is not already illuminated, press it once and the display will show

the measured voltage at the output. This voltage may fluctuate slightly from the voltage
value entered in the previous steps.

6. (Optional) You may also verify the output voltage by connecting the (+) and (-) terminals

to an external voltmeter. The measured value should match or be comparable to the
entered voltage value.

7. Verify channels 2 and 3 according to steps 1 through 6.

Current Check

Follow the steps below to check current output of the power supply.

1. Turn off all output channels ( not illuminated). The display will show the < >

annunciator for all channels on the display.

2. Short the (+) and (-) output terminals for CH1 with test leads or a shorting bar.

3. Set the power supply to settings mode (press so that it is not illuminated).

4. Press the button first and then enter the value (i.e. 1.000 A) on the keypad and

press the button. The current display will now show the value you entered.

5. Enable the output by pressing the button. The < > annunciator will be

replaced with a next to the value entered indicating the power supply is in constant
current mode. This numeric value may fluctuate slightly from the current value entered
in step 4.

6. (Optional) You may also verify the output current by connecting the (+) and (-) terminals

to an external current meter capable of measuring the current that you set. The
measured value should match or be comparable to the entered current value.

7. Verify channels 2 and 3 according to steps 1 through 6.

8. Press the power switch to turn off the power supply and remove the short on the output

terminals.

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4 Menu Access and Options

4.1 How to Access the Menu

Before using the instrument, it is important to be familiarized with its menu structure and learn
how to view or change settings and parameters. Follow the steps below to guide you in
selecting the menu options.

1. From the normal display, press the key and the button to enter the menu.

2. Use the keys or encoder knob to move through the menu selections.

3. When the selected item is blinking, press the button to access its menu

settings. There may be parameters or options to select within each menu item. Follow
the same instructions as described in the previous steps to select them.

4. To save changes to a setting, press the button.

To exit the menu at any time, press the key multiple times. Each press exits out of a
submenu.

4.2 Menu Options

All settings and parameters can be configured from the built-in menu system of the power
supply. The menu system is divided into the following sections as displayed on the power
supply.

Config

OutState

Set the output state during power-on.

OutParam

Set the power-on parameters

Knob

Lock/unlock the rotary knob

Buzzer

Enable/disable instrument beeper

Communication

Select and configure RS232 and USB interfaces

MemoryGroup

Select memory group

Protocol

Select SCPI options

ReturnMeter

Enable automatic return state

Reset

Reset menu

Exit

Move up menu structure

System

CH1

Configure channel 1

CH2

Configure channel 2

CH3

Configure channel 3

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Comb

Off

Turns off series, parallel, or tracking mode

Series

Configure series mode

Para

Configure parallel mode

Track

Configure tracking mode

Exit

Move up menu structure

4.3 Output Power-on State

The initial power-on state of the power supply outputs can be configured.

1. From the Config menu, select OutState and press the button.

2. There are two options that can be selected using the keys or rotary knob:

3. OFF – Default output state.

4. Last – Last output state during the last power-off.

5. Select OFF or Last and press the button.

6. To exit the menu at any time, press twice.

4.4 Output Parameters

This option sets the voltage and current output state values at power-on.

1. From the Config menu, select OutParam and press the button.

2. There are two options that can be selected using the curser keys or rotary

knob:

3. Reset – Restores the default voltage, current, and output states based on factory default

parameters.

Keep – Restores the voltage, current, and output states for each channel based on the
settings during last power-off.

4. Select the desired settings for power-on, and press the button to save changes.

5. To exit the menu at any time, press the key twice.

4.5 Lock/Unlock Rotary Knob

This option enables or disables the rotary knob.

1. From the Config menu, select Knob and press the button.

2. There are two options that can be selected by using the keys or rotary knob:

Unlock – Enable rotary knob
Lock – Disable rotary knob

3. To exit the menu at any time, press the key twice.

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4.6 Buzzer On/Off

This option enables or disables the instrument beeper.

1. From the Config menu, select Buzzer and press the button.

2. There are two options that can be selected by using the keys or rotary knob:

3. Select one of two options below, then press the button:

OFF – Beep is turned off.
ON – Beep is turned on.

4. To exit the menu at any time, press the key twice.

4.7 Communication

Follow the instructions below to select and configure the remote interface.

RS232

1. From the Config menu, select RS-232 and press the button. This will select the

RS-232 interface for remote communication.

2. There are four options that can be selected by using the keys or rotary knob:

3. Use the to select the Baud Rate – 4800, 9600, 19200, 38400, 57600 or 115200

and press button.

4. Use the keys to select the Parity – N None, O Odd, or E Even and press the

button.

5. Use the to select the Control Flow – Single or Mux and press the

button.

6. To exit the menu at any time, press the key twice.

Factory default: 4800,8,N,1, Single

USB

1. From the Config menu, select USB and press the button. This will select the

USB interface for remote communication.

2. To exit the menu at any time, press the key twice.

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4.8 Memory Group

Up to 36 instrument settings can be stored into the instrument’s non-volatile memory. The
internal memory bank is divided into four groups. They are Grp1, Grp2, Grp3 and Grp4. Each
group can save 9 different operating states (1-9).

From the Config menu, select MemoryGroup and press the button.
Use the keys or rotary knob to select one of the four groups – Grp1, Grp2, Grp3, or

Grp4 and press the button.

To save the first 9 instrument settings, select Grp 1, then exit the menu and follow the
instructions in section “3.6 Save/Recall Instrument Settings” to save and recall settings. To save
additional settings, select Grp 2, Grp3, or Grp4, then follow the same steps in section 3.6.

4.9 Protocol

From the Config menu, select Protocol and press the button.
There are three options: DEFAULT, EXT1, LEGACY. Select one of the options by using the

keys or rotary knob and press the button. The DEFAULT option is

recommended for most applications. The LEGACY option supports compatibility with B&K
Precision 9130.

Note: EXT1 is not used.

4.10 Return Meter

This option allows users to enable an internal fixed timer delay (5 seconds) for the power
supply to automatically switch from settings mode to meter mode. When enabled, it will

automatically switch to meter mode after 5 seconds. The backlight of the button will
illuminate. In this state, pushing the button again to toggle back to settings mode will reset the
5-second timer again before the supply changes back to meter mode.

From the Config menu, select ReturnMeter and press the button.

1. There are two options that can be selected by using the keys or rotary knob.

Select OFF or Wait5Sec and press the button.

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Reset

Note: Restoring the instrument to default values will change all current instrument settings
and parameters back to their default values.

All instrument settings can be reset back to their factory default values by doing the following:
From the Config menu, select Reset and press the button.

1. There are two options that can be selected by using the keys or rotary knob,

select NO to exit or YES to proceed and press the button.

Exit

This option will exit the Systems menu and return to the Power Menu….
From the Config menu level, select Exit and press the button.

4.11 System Menu

The system menu allows configuration of each channel’s maximum voltage limit and their
output timer.

To access this menu, press key and then press the button. Use the keys to
select CH1, CH2 or CH3 and press the button.
Use the keys to select MaxVolt, OutTimer or Exit, and then press the button.

MaxVolt

This allows the user to set the maximum voltage that can be entered from the front
panel to avoid accidental damage to DUT (Device under test) connected to the power
supply. The maximum voltage can be entered using the numeric keypad, rotary knob or

the Up/Down arrow keys.

OutTimer

This option will configure the internal output timer of the selected channel. When the
timer is enabled, the user can set the timer from 0.1 to 99999.9 seconds for each
output. This will configure the power supply to enable the output for the specified
period of time. This value can be set using the numeric keypad, rotary knob or the

Up/Down arrow keys.

From the Out Timer State Set menu level, use the keys to select Enable and

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press . Enter a value from 0.1 to 99999.9 seconds and press . The

timer begins when the output is enabled. To restart the timer, press the

button Off and back on again. To turn the output timer off, select Disable from

the Out Timer State Set menu level.

Exit

This option will exit the System menu and return to the Power Menu….
From the System menu level, select Exit and press the button.

4.12 Combined Series and Parallel Modes

This section describes how to configure the power supply for series and parallel modes.
From the Power Menu…. Select Comb followed by the button. The display will show

four menu options OFF Series Para Track. Each of these options are described below.

Figure 8 – Normal Wiring

OFF

This option is used to disable series, parallel, or tracking modes.

1. From the Power Combine Set… menu select OFF and press the button.

2. The power supply will momentarily display Remove Successful! Before returning

to normal display.

Series Mode

The series mode doubles the available voltage range that can be supplied by combining
the voltage of channels 1 and 2. The following steps will describe the external wiring and
instrument setup required to use this feature.

1. Power down the unit and remove all wiring from the output terminals.

2. Verify all wiring is connected as illustrated below:

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Figure 9 - Series Mode Wiring Diagram

3. Power on the unit and verify that the outputs are disabled (On/Off button

is not illuminated).

4. From the Power Combine Set… menu, select Series and press the button.

5. As CH1+Ch2 is blinking, press the button. The power supply will display

Series Successful! The display should look like the one shown belowError! R
eference source not found.. Series and CH1+2 will be shown in the middle of the

display.

Figure 10 - Display Series CH1+2

6. Set the voltage and current for CH1+2 and CH3.

7. Enable the outputs by pressing the button.

8. If the button is not illuminated, press the button once to display

the measured voltage and current at the output.

Para (Parallel Mode)

The Parallel mode will increase the available current range that can be supplied by
combining channels 1 and 2, 2 and 3, or All. The following steps will describe the
external wiring and menu options for combining channels CH1+CH2.

1. Power down the unit and remove all wiring from the output terminals.

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Figure 11 – Parallel Mode Wiring Diagram

2. Verify all wiring is connected as illustrated.

3. Power on the unit and verify that the outputs are turned off the On/Off

button is not illuminated.

4. From the Power Combine Set… menu select Para and press the

button.

5. The following options are available: CH1+CH2, CH1+CH3 or ALL.

6. Select CH1+CH2 and press the button. The power supply will display

Parallel Successful!

Figure 12 - CH1+CH2 Parallel Display

7. Set the voltage and current (max current will be the sum of the combined

channels).

8. Enable the outputs by pressing the enter button, which will illuminate.

9. If the button is not illuminated, press the button once to

enable the measured voltage and current at the output.

Note: For combining CH1+CH3 follow the same steps and select CH1+CH3 for the option
in step 5.

Parallel ALL Mode

The following steps will describe the external wiring and menu options for combining
ALL channels.

1. Power down the unit and remove all wiring from the output terminals.

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Figure 13 – Parallel Mode Wiring for All Channels

2. Verify all wiring is connected as illustrated.

3. Power on the unit and verify that the outputs are turned off (On/Off button not

illuminated).

4. From the Power Combine Set… menu, select Para and press the button.

5. The following options are available: CH1+CH2, CH1+CH3 or ALL.

6. Select ALL and press the button. The power supply will display Parallel

Successful!

Figure 14 - All Channels Parallel Display

4.13 Tracking Mode

This function configures the channels for tracking mode. In tracking mode, when a voltage or
current parameter is changed, channels change according to the ratio between channels.

1. From the Power Combine Set… menu, select Track and press the button.

2. Select one of the following: CH1+CH2, CH1+CH3 or ALL. Then, press the

button.
The power supply will display Track Set Successful! The symbol will appear on the

display to indicate tracking is enabled.

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Note: Set the intended ratio before enabling tracking. The tracking is based on a ratio
between CH1 and CH2 when the tracking is enabled. If the voltage is the same on both
channels when set, the two channels will track together based on a 1 to 1 ratio. For
example, if CH1 = 1 V and CH2 = 2 V a 1 to 2 ratio is set when tracking is enabled. With
this ratio, a voltage increase on CH1 from 1 to 2 volts will result in 4 volts on CH2.

Tracking function is disabled if 0 V or 0 A is set when tracking is enabled.

4.14 Parameters in Series/Parallel Mode

Maximum voltage

When operating in Series mode, voltages between channels add. In Parallel mode, the voltage
equals the maximum voltage of the lowest voltage channel.

Table 4.1 - Maximum Voltage in Series/Parallel Modes

Model

9130C

9131C

9132C

Series CH1+CH2 Max Voltage

62 V

62 V

122 V

Parallel CH1+CH2 Max Voltage

31 V

31 V

62 V

Parallel CH2+CH3 Max Voltage

6 V

6 V

6 V

Parallel CH1+CH2+CH3 (All) Max Voltag
e

6 V

6 V

6 V

4.15 Over Temperature Protection

If the internal temperature of the power supply exceeds 176°F (80°C), the instrument will
protect itself by automatically turn the output off. When this happens, the instrument beeper
will turn on and the display will indicate Over Temp. It is recommended that the power supply
be disconnected from the DUT and powered off to allow the supply to cool down to normal
operating temperature.

4.16 Remote Sense

Remote sense can be used to compensate for voltage drops (up to 1 V) due to resistance from
test leads connected to your device under test (DUT), thus providing more accurate output
voltage. The power supply is initially set up to local sense mode by default. Refer to the
following sections for details of local and remote sense setup.

Local Sense

By default, the power supply is set up for local sense with jumpers installed. This is determined

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by the wire connections in the rear panel as shown below.

Figure 15 - Jumpers installed for local sense

DO NOT disconnect the jumpers if remote sense is not used. Doing so will cause
erratic behavior and may damage the power supply under certain conditions.

Never connect any power source into any of the terminals at any time during
operation.

When output is enabled, DO NOT use your hands to touch the terminals or the
screws that are designed to tighten wires to the terminals. Doing so may create a
shock hazard under high voltage output conditions.

Remote Sense

To enable remote sense, follow the steps below for each channel:

1. Power OFF the supply and disconnect all loads and cables connected to it.

2. Use a small flat blade screwdriver to loosen and remove the jumper wires as shown

below.

Figure 16 - Sense jumpers removed

1. Connect wires to the DUT as illustrated in Figure 17 - Remote sense connections. Make

the connections between + and S+ and S- and – for each channel that will be using
remote sense. The S+ and S- wires should be twisted as illustrated to minimize noise.

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Figure 17 - Remote sense connections

2. Connect the S+ to the Device Under Test (DUT)’s positive (+) terminal, and connect the

S- to the DUT’s negative (-) terminal.

3. Double check that the connections matches to Figure 17 - Remote sense connections.

4. Power ON the supply and then configure and enable the output.

DO NOT at any time disconnect the wires from the S+ and S- terminals to the DUT
while output is enabled (ON). Doing so may damage the power supply and cause
unstable output.

5 Remote Operation

The power supply comes standard with RS232 and USBremote interfaces. Users can program
the power supply by using SCPI (Standard Commands for Programmable Instruments)
commands over any one of the remote interfaces. This section will describe how to set up all of
the supported interfaces.

Note: The indicator will appear on display when the power supply is successfully connected
to a PC remotely through any remote interface. Keys on the front panel will be locked until the

instrument is in LOCAL mode. To return to LOCAL mode from the front panel, press . The

indicator will disappear when the instrument is in LOCAL mode.

5.1 Interface Configuration

RS-232

For RS-232 connectivity, refer to the diagram below for pin out information. The RS-232 is
labeled in the rear panel and it is a female DB-9 interface.

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PIN

Description

1 - 2

Transmit Data

3

Receive Data

4 - 5

GND 6 - 7 - 8 - 9 -

Figure 18 - RS-232 Pin out

A straight pin-to-pin DB9 female to DB9 male serial cable is required for using the RS-232
interface. Do not use a null modem or crossover DB9 serial cable.

Follow the steps below to configure the power supply for RS-232 operation:

1. From the Config menu, select Communication and press the button.

2. Press the keys until RS-232 is blinking and press the button.

The configurable options are:

Baud rate: 9600 (default), 19200, 38400, 57600, 115200.
Parity/data bits: None/8 bits (default), Even/8 bits, Odd/8 bits.
Address: Single, Mux

3. Use the keys to select the option and the keys to change settings. When

all three options are set press the button.

4. If MUX mode has been selected specify the ADDR using the keypad or and press

the button.

Note: The RS-232 interface does not have a flow control mechanism. The
programmer should be aware of this limitation and allow sufficient command
process time. If the remote commands are sent too fast the power supply’s internal
buffer may overrun and cause a communication error. Therefore, adding a delay
between commands to allow for sufficient time to process commands is required.

5. All serial settings must match the settings configured on the PC in order for

1 2 3 4 5

6

7 8 9

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communication to link successfully.

USB

All models include a USBTMC-compliant interface that can be used for remote communication.
There are no settings in the menu system for USB configuration. The only requirement is a
USBTMC driver. We recommend using the drivers provided by National Instruments, which
come included with NI-VISA and can be downloaded here: http://www.ni.com/visa

1. From the Config menu, select Communication then press .

2. Use the keys to select the USB option then press . No other options

are required.

6 Remote Commands

The instrument supports some SCPI commands and some instrument specific commands. These
commands enable a computer to remotely communicate and control the instrument over any of
the supported remote interfaces: USBTMC and RS-232.

Refer to the programming manual for details, which can be downloaded from

www.bkprecision.com.

7 Troubleshooting Guide

Below are some frequently asked questions and answers. Please check if any apply to your
power supply before contacting B&K Precision.

General
Q: I cannot power up the power supply.

- Check that the power cord is securely connected to the AC input and there is live power

from your electrical AC outlet.

- Verify that the AC power coming from the mains contains the correct voltage. The power

supply can accept a specific range of AC input voltages. Refer to section 2.1.

Q: How do I set up the supply to run in constant current mode?

- The supply is a CV/CC power supply that automatically crosses over from CV to CC upon a

load, which draws current at the current limit (ISET). Therefore, it is dependent on the
load. For example, if ISET is configured as 1 A, the load must draw 1 A before the supply
will go into CC mode.

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Q: How come my display voltage is lower than the voltage I set?

- This is often because of the resistances from the test leads/wires connected between the

supply and the DUT (device under test), which causes a drop in voltage. To minimize this
drop, use remote sense terminals to compensate and output a more accurate voltage to
the DUT.

Q: I cannot set voltage at the maximum rating.

- This may be that the set voltage is outside of the voltage maximum limit. Refer to the

MaxVolt section of the manual and set this value above the voltage that is being entered.
This can also be set to the limit of the power supplies range, which in effect turns off the
MaxVolt function.

Remote Control
Q: I am trying to send the commands over RS232, but it does not seem to respond.

- Check that you are sending ASCII strings that are terminated with a CR (carriage return) and

LF (linefeed) character.

- For RS-232, check that the baud rate, parity, data bits, stop bit, and flow control settings

match with the settings configured on both the software interface and the power supply

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8 Specifications

Note: All specifications apply to the unit after a temperature stabilization time of 15 minutes

over an ambient temperature range of 23 °C ± 5 °C. Specifications are subject to change
without notice.

Environmental Conditions:

This power supply is designed for indoor use and operation with maximum relative humidity of
80%.

Model

9130C

9131C

9132C

Output Rating

Voltage

0-30 V (Ch 1 and Ch2),

0-5 V (Ch3)

0-30 V (Ch 1 and Ch2),

0-5 V (Ch3)

0-60 V (Ch 1 and Ch2),

0-5 V (Ch3)

Current

0-3 A (Ch 1 and Ch2),

0-3 A (Ch3)

0-6 A (Ch 1 and Ch2),

0-3 A (Ch3)

0-3 A (Ch 1 and Ch2),

0-3 A (Ch3)

Power

195 W

375 W

375 W

Line Regulation

Voltage

≤ 0.01% + 3 mV

≤ 0.01% + 3 mV

≤ 0.01% + 3 mV

Current

≤ 0.1% + 3 mA

≤ 0.1% + 3 mA

≤ 0.1% + 3 mA

Load Regulation

Voltage

≤ 0.01% + 3 mV

≤ 0.01% + 3 mV

≤ 0.01% + 3 mV

Current

≤ 0.1% + 3 mA

≤ 0.1% + 3 mA

≤ 0.1% + 3 mA

Ripple and Noise

Voltage

≤ 1 mVrms

≤ 1 mVrms

≤ 1 mVrms

Current

≤ 3 mArms

≤ 5 mArms (Ch1 and Ch2),

≤ 4 mArms (Ch3)

≤ 4 mArms

Temperature Coefficient (0 °C to 40 °C) ± (% output + offset) (typical)

Voltage

≤ 0.03% + 10 mV

Current

≤ 0.1% + 5 mA

Programming Resolution

Voltage

1 mV

1 mV

1 mV

Current

1 mA

1 mA

1 mA

Readback Resolution

Voltage

1 mV

1 mV

1 mV

Current

1 mA

1 mA

1 mA

Programming Accuracy ± (% output + offset)

Voltage

≤ 0.03% + 10 mV

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Current

≤ 0.1% + 5 mA

≤ 0.1% + 8 mA (Ch1 and

Ch2)

≤ 0.1% + 5 mA (Ch3)

≤ 0.1% + 5 mA

Readback Accuracy ± (% output + offset)

Voltage

≤ 0.03% + 10 mV

≤ 0.03% + 10 mV

≤ 0.03% + 10 mV

Current

≤ 0.1% + 5 mA

≤ 0.1% + 8 mA (Ch1 and

Ch2)

≤ 0.1% + 5 mA (Ch3)

≤ 0.1% + 5 mA

Series Accuracy (Combined Mode)

Current

≤ 0.05% + 10 mA

Parallel Accuracy (Combined Mode)

Voltage

≤ 0.02% + 5 mV

Current

≤ 0.1% + 20 mA

General

Memory

4 memory groups with 9 locations in each group

Remote
Interface

USB (USBTMC-compliant), RS-232

AC Input

110/220 VAC (+/- 10 %), 47 Hz - 63 Hz

Operating
Temperature

32 °F to 104 °F (0 °C to 40 °C)

Storage
Temperature

-4 °F to 158 °F (-20 °C to 70 °C)

Dimensions
(W×H×D)

8.45” x 3.47” x 13.96”

(214.5 x 88.2 x 354.6

mm)

8.45” x 3.47” x 17.52” (214.5 x 88.2 x 445 mm)

Weight

16.98 lbs. (7.7 kg)

33.07 lbs. (15 kg)

To ensure the most current version of this manual, please visit .

9 Calibration

We recommend a calibration interval of once per year to ensure that the power supply meets
specifications.

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