BK Precision 9172, 9173, 9181, 9182, 9183 Instruction Manual

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Model: 9171, 9172, 9173, 9174, 9181, 9182, 9183, 9184, 9185

Programmable DC Power Supplies

USER MANUAL

Safety Summary

The following safety precautions apply to both operating and maintenance personnel and must be observed during all phases of operation, service, and repair of this instrument. Before applying power, follow the installation instructions and become familiar with the operating instructions for this instrument.

If this device is damaged or something is missing, contact the place of purchase immediately.

This manual contains information and warnings that must be followed to ensure safe operation as well as maintain the meter in a safe condition.

GROUND THE INSTRUMENT

To minimize shock hazard, the instrument chassis and cabinet must be connected to an electrical ground. This instrument is grounded through the ground conductor of the supplied, threeconductor ac power cable. The power cable must be plugged into an approved three-co nduc t or electr ical out let. Do not alter the ground connection. Without the protective ground connection, all accessible conductive parts (including control knobs) can render an electric shock. The power jack and mating plug of the power cable must meet IEC safety standards.

DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE

Do not operate the instrument in the presence of flammable gases or fumes. Operation of any electrical instrument in such an environment constitutes a definite safety hazard.

KEEP AWAY FROM LIVE CIRCUITS

Instrument covers must not be removed by operating personnel. Component replacement and internal adjustments must be made by qualified maintenance personnel. Disconnect the power cord before removing the instrument covers and replacing components. Under certain conditions, even with the power cable removed, dangerous voltages may exist. To avoid injuries, always disconnect power and discharge circuits before touching them.

DO NOT SERVICE OR ADJ UST ALONE

Do not attempt any internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is present.

DO NOT SUBSTITUTE PARTS OR MODIFY THE INSTRUMENT

Do not install substitute parts or perform any unauthorized modifications to this instrument. Return the instrument to B&K Precision for service and repair to ensure that safety features are maintained.

WARNINGS AND CAUTIONS

WARNING and CAUTION statements, such as the following

examples, denote a hazard and appear throughout this manual. Follow all instructions contained in these statements.

A WARNING statement calls attention to an operating procedure, practice, or condition, which, if not followed correctly, could result in injury or death to personnel.

Do not alter the ground connection. Without the protective ground connection, all accessible conductive parts (including control knobs) can render an electric shock. The power jack and mating plug of the power cable meet IEC safety standards.

To avoid electrical shock hazard, disconnect power cord before removing covers. Refer servicing to qualified personnel.

Before connecting the line cord to the AC mains, check the rear panel AC line voltage indicator. Applying a line voltage other than the indicated voltage can destroy the AC line fuses. For continued fire protection, replace fuses only with those of the specified voltage and current ratings.

This product uses components which can be damaged by electrostatic discharge (ESD). To avoid damage, be sure to follow proper procedures for handling, storing and transporting parts and subassemblies which contain ESD

A CAUTION statement calls attention to an operating procedure, practice, or condition, which, if not followed correctly, could result in damage to or destruction of part or all of the product.

WARNING:

CAUTION:

-sensitive components.

This product is subject to Directive

Compliance Statements

Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collection systems)

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.

CE Declaration of Conformity

The power supplies models 9171, 9172, 9173, 9174, 9181, 9182, 9183, 9184, 9185 meet the requirements of 2006/95/EC Low Voltage Directive and 2004/108/EC Electromagnet Compat ibility Directive with the following standards.

Low Voltage Directive

- EN61010-1: 2001 Safety requirements for electrical equipment for measurement, control, and laboratory use. Part 1: General requirements

EMC Directive

- EN 61000-3-2: 2006

- EN 61000-3-3: 1995+A1: 2001+A2: 2005

- EN 61000-4-2: 1995+A1: 1998+A2: 2001

- EN61000-4-3: 2006+A1: 2008

- EN61000-4-4: 2004

- EN61000-4-5: 2006

- EN61000-4-6: 2007

- EN61000-4-11: 2004

- EN 61326-1: 2006

Electrical equipment for measurement, control, and laboratory use.

instrument.

Safety Symbols

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

Chassis (earth ground) symbol.

On (Power). This is the In position of the power switch when instrument is ON.

Off (Power). This is the Out position of the power switch when instrument is OFF.

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

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

Table of Contents

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

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

1.2 Package Contents ................................................................. 2

1.3 Front Panel Overview........................................................... 3

Front Panel Description ................................................................. 5

1.4 Rear Panel Overview ............................................................ 6

Rear Panel Description .................................................................. 8

1.5 Optional Accessories ............................................................ 8

Interface Card Options .................................................................. 8

Rack mount Options...................................................................... 9

1.6 Display Overview ................................................................. 9

Display Description ..................................................................... 10

1.7 Installing Optional Interface Cards .................................... 10

How to Install Interface Cards ..................................................... 11

Removing Interface Cards ........................................................... 12

1.8 Rackmount Installation ...................................................... 13

2 Getting Started .................................................................... 18

2.1 Input Power and Fuse Requirements ................................ 18

Input Power ................................................................................. 18

Fuse Requirements ...................................................................... 18

2.2 Line Voltage Selection ........................................................ 19

2.3 Output Connections ........................................................... 21

2.4 Preliminary Check .............................................................. 23

Output Check .............................................................................. 25

Check Model and Firmware Version ........................................... 27

3 Front Panel Operation ...................................................... 28

3.1 Menu Options .................................................................... 28

How to Access the Menu ............................................................. 29

3.2 Remote Interface Setup ..................................................... 32

USB Interface (virtual COM) ........................................................ 32

GPIB Interface ............................................................................. 34

Ethernet (LAN) Interface ............................................................. 34

RS-232 and RS-485 Interface (Optional) ..................................... 35

3.3 Adjusting LCD Display, Key Lock, Key Sound ...................... 39

LCD Backlight Timer .................................................................... 39

Key Lock ...................................................................................... 39

Disabling Key Sound .................................................................... 40

3.4 Restore to Factory Default ................................................. 41

3.5 Configure Voltage and Current Output .............................. 43

Voltage and Current Limit Settings ............................................. 43

Configure Voltage and Current Output ....................................... 45

Slew Rate Configuration ............................................................. 51

Output Timer Function ................................................................ 53

Measurement Average Setting ................................................... 55

3.6 Dual Channel Configurations ............................................. 55

Multi/Single Output Control ....................................................... 55

Series/Parallel Tracking Mode .................................................... 56

3.7 Remote Sense .................................................................... 57

3.8 LED and Low Current Test Modes ...................................... 62

LED Mode .................................................................................... 62

Low Current Mode ...................................................................... 64

3.9 Output Protection .............................................................. 66

Configure OVP ............................................................................. 66

Configure OCP ............................................................................. 67

3.10 Save/Recall Output Settings .............................................. 68

3.11 Sequence Program Mode .................................................. 71

3.12 External Analog Control ..................................................... 72

3.13 Digital I/O ........................................................................... 77

INPUT .......................................................................................... 79

OUTPUT ...................................................................................... 80

3.14 Display Errors ..................................................................... 81

3.15 Connecting in Series and Parallel ....................................... 82

4 Remote Operation .............................................................. 83

4.1 Interface Connection ......................................................... 83

USB (Virtual COM) & RS-232 ....................................................... 83

GPIB ............................................................................................ 84

Ethernet (LAN) ............................................................................ 85

4.2 Remote Commands ........................................................... 90

Parameter Definitions ................................................................. 91

Remote Commands ..................................................................... 91

4.3 Sequence Programming ................................................... 134

Examples ................................................................................... 134

4.4 Multi Unit Programming .................................................. 138

Remote Commands via USB ...................................................... 139

5 Troubleshooting Guide ................................................. 150

General ..................................................................................... 150

Remote Control ......................................................................... 152

6 Specifications ................................................................... 153

7 Calibration ......................................................................... 158

Access Calibration Menu ........................................................... 158

Requirements ............................................................................ 159

Current Calibration ................................................................... 159

Voltage Calibration ................................................................... 163

External Analog Input Calibration............................................. 165

Index ........................................................................................... 170

SERVICE INFORMATION ........................................................ 171

LIMITED THREE-YEAR WARRANTY ................................. 172

1 General Information

1.1 Product Overview

The 917x and 918x series are high-performance dual range linear DC power supplies that provide clean and reliable power with high resolution and accuracy. All models are programmable via standard USB interface or optional RS232, GPIB and LAN interface. Interface cards and I/O cards come in a modular form factor. Selected models feature high voltage outputs or dual channels to provide series/parallel tracking functionality. All models include front and rear panel outputs for flexibility, and feature programmable list mode for storing and running customized test sequences. Additionally, a unique LED test mode function can be enabled for LED test applications requiring minimal inrush current out put. These power supplies are suitable for bench or rack mount operation with the available rack mount kit option.

Features

• Single and dual output models with up to 210W output power

• High accuracy and low noise output

• Dual range output with automatic range selection (except of

high voltage models 9184 and 9185)

• Fast transient response of < 50 μs of most models

• Very low ripple and noise

• LED test mode for low inrush current output

• Programmable list mode for creating test sequences

• Front and rear remote sense terminals for single output

models (except of high voltage models 9184 and 9185)

• OVP, OCP, and OTP protection

• Two interchangeable interface slots accepting any of the

following optional interface cards: LAN/GPIB, Digital I/O and Analog control, RS485, RS232

• Standard USB interface (virtual COM)

• Programmable voltage and current slew rates

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:

• 917x/918x Power supply

• User Manual

• AC Power Cord

• USB Type A to Type B Cable

• Line fuse (for 115V or 230V operation)

• Certificate of Calibration

• Test Report

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

2 5 6

2120 18

10 11 8 12 13

3 4 97

2 517106 7 11 8 129 133 4

1.3 Front Panel Overview

Figure 1 - Front Panel for 9171/91 72/9 181

Figure 2 - Front Panel for 9173/91 74

2 5

7 11

8 12

19 21

2 517106 7 11 8 129 133 4

Figure 3 - Front Panel for 9182/91 83

Figure 4 - Front Panel for 9184/9185

Output button (Dual channel models have CH1 and CH2 output buttons)

Main output terminals (Models 9182,9184,9185 have larger binding post terminals for high current/voltage outputs)

Front panel +S/-S sense terminals (Not available with models 9173, 9174, 9184, 9185)

5 6 7

Front Panel Description

Power ON/OFF button LCD display Esc / CLR button Menu button ISET button VSET button Decimal/LCL(Local) button Numeric keypad RCL (Recall) button OVP indicator OCP indicator RMT (Remote mode) indicator LOCK (Key lock) indicator Enter button Up, Down arrow keys Left, Right arrow keys

Output ON/OFF indicator light

Front terminal shorting bars

29 30

25 26 27

26 27

1.4 Rear Panel Overview

Figure 5- Rear View for 9171/9172/9181

Figure 6- Rear View for 9173/9174

25 24

3125 26 27

22 23

3124 26 27

Figure 7- Rear View for 9182/9183

Figure 8- Rear View for 9184/9185

7 Line voltage selection switch (bottom of power supply) See “2.2Line Voltage Selection” for details.

Model

Description

DRGL

GPIB/LAN interface card

DR1DIO

Single channel digital I/O and analog control card

DR2DIO

Dual channel digital I/O and analog control card

DRRS485

RS485 interface card

DRRS232

RS232 interface card

Rear Panel Description

S1 interface slot (shown with optional LAN/GPIB interface card) S2 interface slot (shown with optional DIO/Analog interface card) USB interface Temperature controlled cooling fan(s) AC input fuse box Line input receptacle Rear panel outputs (++/--) and sense (+S/-S) terminals Shorting pins

Chassis ground

1.5 Optional Accessories

The following lists all optional accessories supported by the 917x/918x series power supplies.

Interface Card Options

Model

Description

Rackmount kit for two 2U power supplies mounted side by side

DRRM3U1

Rackmount kit for single 3U power supply

Rackmount kit for two l 3U power supplies mounted side by side

2 3 1

Rack mount Options

Rackmount kits are available for all 9 models. Refer to the following to determine your power supply rack mount size.

2U size: Models 9171, 9172, 9181 3U size: Models 9173, 9174, 9182, 9183, 9184, 9185

DRRM2U1 Rackmount kit for single 2U power supply DRRM2U2

DRRM3U2

1.6 Display Overview

The main displays for single and dual channel models are shown below.

CV5 . 000 V1 . 000 A

Figure 9- Main Display

9 Voltage display (When output is OFF, it shows VSET voltage. When output is ON, it shows measured voltage)

Current display (When output is OFF, it shows ISET current. When output is ON, it shows measured current)

CH2CV5 . 000 V1 . 000 A

2 3 1

1 2 3

CH1CV

5 . 000 V1 . 000 A

Figure 10- Dual Channel Main Display

Display Description

Output Mode (CV, CC, OFF)

Selected channel indicators

1.7 Installing Optional Interface Cards

Five optional interface cards are available and can be installed in either the S1 or S2 slots. They are:

Option 1: GPIB/LAN Card

Adds GPIB and LAN interface

Option2: DIO/Analog Card (Single channel)

Adds digital I/O and External Analog Cont rol

Option 3: DIO/Analog Card (Dual channel)

Adds dual channel digital I/O and External Analog Control

Option 4: RS485 Card

: : : : : : : : : : : : : : : : : : : : : :

Metal

notch

Card

rail

48-pin female connector

Adds RS-485 interface for multi power supply control

Option 5: RS232 Card

Adds RS-232 interface

How to Install Interface Cards

1. Power off the instrument and disconnect the AC power cord in the rear panel. Remove the back faceplate covering the S1 or S2 slot in the rear panel by removing the two screws on each side.

2. Make note of the metal notches that indicate where the card should slide into. Inside the slot, there are two rails (left and right side) where the card should slide smoothly into. The very back of the slot is a 48-pin female connector that should connect with the 48-pins on the back of the interface card.

3. The interface card should go right below the metal notches on both sides and fit in between the inner card rails, also on

Interface card

both sides. Slide the card down carefully. When it touches the 48-pin connector, slowly push the card all the way in until the panel of the interface card aligns with the rear panel of the power supply.

4. Place the two screws to tighten and secure the installed card.

5. Connect the power cord and turn on the power supply. The newly installed card will be detected during boot up, indicated next to S1: or S2: (depending on which slot the card is installed into).

Removing Interface Cards

1. Power off the instrument and disconnect the AC power cord

2. Use a flat blade screwdriver to gently pry the left and right

in the rear panel. Remove the two screws on each side of the installed interface card.

side of the interface card plate. When there is enough room,

use the screwdriver to pry the top part of the card until the card has slid out with enough room to pull out the card by hand.

3. Be sure to ground yourself before pulling out or touching any parts of the printed board on the interface card.

1.8 Rackmount Installation

There are four rackmount kit options available for this series of power supplies: 2U size for single power supply, 2U size for two power supplies mounted side by side, 3U size for single power supply, 3U s ize f or two power supplies mounted side by side. The following step by step instructions will guide you in installing these optional rackmount kits onto the power supply for a standard 19-inch rack fitting. Models 9171, 9172, 9181: Follow instructions for 2U rackmount installation. Models 9173, 9174, 9182, 9183, 9184, 9185: Follow instructions for 3U rackmount installation.

emo

ve t

he p

arts

tep

6 5

Step 2

Step 1

e t

e p

p 1

2 3

2 3 4

Step 4

Fas

ten

the

par

tep

5 5

Step 3

Fas

ten

the p

art

tep

7 9

Figure 11- 2U Single Supply Rackmount Installation

Step 1

Step1:

1 2

Remove the parts

21 3 4

6 9 6

Step 3

Step3: Removethe parts

Step 5

Fastenthe parts

Step2:

Step 2

Step 4

Fastenthe parts

Step4:

Fastenthe parts

Remove the parts

Step5:

Step7:

Step 7

6 6

Step 6

Step6: Fastenthe parts

6 6

Figure 12- 2U Dual Supplies Rackmount Installation

Remove the parts

Step 2:

5 6

Step 2

Step 1

Remove the parts

2 3

Step 1:

21 43

Fasten the parts

Step 4:

Step 4

9 5

5 5

Step 3

Faste

n t

e p

arts

Step 3

97 8

Figure 13- 3U Single Supply Rackmount Installation

Step 1

Step1:

1 2

Removetheparts

21 43

6 9 6

Step 3

Step3: Removethe parts

Step 5

Step 2

Step2: Fastenthe parts

Step4: Fastenthe parts

Step 4

Fastenthe parts

Removethe parts

Step5:

Step7:

Step 7

Step 6

Step6:

Fastenthe parts

Figure 14–3U Dual Supplies Rackmount Installation

2 Getting Started

2.1 Input Power and Fuse Requirements

Input Power

The rated AC input power source for powering the supplies must be within:

115V Operation:103.5V-126.5V 230V Operation: 207V - 253V

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 t he r ated voltage/current and that there is sufficient circuit capacity for the power supply. Once verified, connect the cable firmly.

WARNING:

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.

Fuse Requirements

An AC input fuse is necessary when powering the instrument. Below is a table showing the required fuses for AC line input 115V and 230V operation for all models.

Model

115 V AC

230 V AC

9171

2.5 A

1.25 A

9172

2.5 A

1.25 A

9173

4 A

2 A

9174

4 A

2 A

9181

3.15 A

1.6 A

9182

5 A

2.5 A

9183

4 A

2 A

9184

4 A

2 A

9185

4 A

2 A

Table 1- Input Fuse Table

Note: All fuses listed have the specifications: T250V, slow blow (slow acting), 5 x 20mm.

2.2 Line Voltage Selection

The power supplies can be selected to operate with 115V input or 230 V input. To ensure that your instrument is properly configured to operate at the desired AC line voltage, please follow the steps below:

CAUTION:

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

Fuse box sli

Fuse box

Check/Remove Fuse

Step 1 - Check and/or Change Fuse

- Locate the fuse box next to the AC input connector in the rear panel.

- 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 1).

Step 2 - Check and/or Change Line Voltage Switch

- Carefully lift and turn the instrument upside down.

- Locate the red Line Voltage Switch, which has markings that

indicate “115” for 115V or “230” for 230V line operation. Set the switch to the desired line voltage operation.

instrument and void all warranty.

Line Voltage Switch

Rear P

Front Panel

(Bottom View)

Front Feet

Rear Feet

anel

WARNING:

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

2.3 Output Connections

These power supplies have both front panel binding posts and rear panel terminals for output connections, and they are paralleled together. The two (+) and two (-) (per channel for dual channel models) rear output terminals can accept wire sizes AWG 24 to AWG 12 (See Table 2 current output is between 5 to 10 A. For current output above 10 A, remove the shorting barsfrom the front panel, but do not remove the

). However, we recommend using 12 AWG if

shorting pins on the rear panel.Use two separate wires/leads to connect both (+) terminals and (-) terminals as shown below:

WARNING:

damage the power supply.

AWG

Imax(A)

10 7 5

3.5

2.5

1.7

mΩ/meter

3.3

5.2

8.3

13.2

33.5

52.8

84.3

133.9

212.9

Rear Panel Output

- - -

+ -

+S + - -S

Remove shorting bars

Front Panel Output

For 10 A or higher current output

DUT

DO NOT output 10 A or more with only one pair of (+) and (-) terminals. Both (+) and (-) terminals must all be connected for applications requiring more than 10 A output. Each terminal can only accept a maxi mum of 10 A. Exceeding this may

Table 2- Wire Gauge Rating

WARNING:

wires.

Before connecting wires to the front or rear panel 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

2.4 Preliminary Check

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

1. Verify Line Voltage Selection

Complete the steps as described in “2.2 Line Voltage

2. Connect Power and Self Test

Selection” to make sure the supply is correctly setup to operate with the line voltage source to be used.

Connect AC power cord to the AC receptacle in the rear panel and press to turn on the instrument. It will run through a self test procedure, as well as check for installed interface cards. The following scr ee n s will display before it’s ready for use (Display will vary based on the model and installed interface cards)

POWER

S2 : RS485

VER : 2 . 00

SRAM TEST . . . . . . . . . . . . . . . . . . . OK

MAIN TEST . . . . . . . . . . . . . . . . . . .OK

CHECKING FOR EEPROM DATA

CHECKING FOR OPTION CARD . . S1 : GPIB/LAN CARD

B&K PRECISION

9181

Vset

Enter

CH1

Output Check

Voltage Check

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

1. Turn on the power supply. The display will show the OFF

annunciator next to the setting voltage on the left side of the display.

2. Enable the output by pressing (or and for

OUTPUT

CH2

dual channel models). The output indicator light will be lit and display will show the measured output voltage. The OFF annunciator will change to CV.

3. Using the numeric keypad, press and enter a voltage

value. Then press the key. For dual channel models, select the channel first before setting the voltage. The selected channel is indicated by a flashing CH1 or CH2

annunciator on the display. Press or to select the channel.

4. Th e measured output voltage should change to a value close

to or exactly what you entered (For example, if voltage value is 30.000 V, it may show 29.998 V).

5. (Optional) You may also verify the output voltage by

connecting either the (+) and (-) term ina ls on the front panel or the rear panel to an external voltmeter. The measured value should match or be close to the entered voltage value.

Enter

Iset

Current Check

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

1. Turn on the power supply. The display will show the OFF

annunciator next to the setting voltage on the left side of the display.

2. Short the (+) and (-) output terminals with test leads, shorting

bar, or cl ip. (Ref er t o Table 2 to select appropriate test leads)

3. Enable the output by pressing (or and for

OUTPUT

CH1

CH2

dual channel models). The output indicator light will be lit and display will showthe measured output voltage. The OFF annunciator will change to CC.

4. Using the numeric keypad, press and enter a current

value. Then press the key. For dual channel models, select the channel first before setting the voltage. The selected channel is indicated by a flashing CH1 or CH2

annunciator on the display. Press or to select the channel.

5. The measured output current should change to a value close

to or exactly what you entered (For example, if current value is 5.0000 A, it may show 4.9998 A).

6. (Optional) You may also verify the output current by

connecting either the (+) and (-) term ina ls on the front panel or the rear panel to an external current meter capable of measuring the current that you set. The measured value should match or be close to the entered current value.

Esc

7. Press to turn off the power supply and remove the

POWER

short on the output terminals.

Check Model and Firmware Version

The model and firmware version can be verified from one of the boot up screens, or from using the *IDN? query remote command, described in “4.2 Remote Commands”. Additionally, ot her system version and information can be found by following the steps below:

1. Press , then to enter INFORMATION. The

following screen will be displayed.

LCD VER = 2.00 / WEB VER = 1.04 MODULE VER = 1.10 / 1.10

2. There are multiple version numbers shown. However, the

firmware version is displayed under MODULE VER. In the example screen above, firmware version is shown as 1.10.

3. Press twice to exit the menu.

3 Front Panel Operation

3.1 Menu Options

All settings and parameters can be configured from the built-in menu system of the power supply. To access the menu, press . The menu system is divided into 8 categories and organized as follows:

1. SYSTEM SETTING

• REMOTE(USB,ETHERNET,GPIB,RS232 (optional))

• GPIB ADDR(1-30)

• KEY LOCK(ON,OFF)

• IP CONFIG(STATIC)

• IP AD DRE SS(xxx.xxx.xxx.xxx, where x = 0-9)

• BEEP(ON,OFF)

• LCD BACKLIT(ALWAYS ON, 1,5,10,30 MINS OFF)

• RECALL DEFAULT(NO,YES)

• POWER ON STATE (OFF,LAST)

• OUTPUT MODE (MULTI,SINGLE)*

• TRACKING MODE (ON,OFF)*

• EXTERN CONTROL (VOLT,RES,OFF) (optional)

• EXTERN LEVEL (5V,10V) (optional)

• EXTERN TRIG (ON,OFF) (optional)

2. OUTPUT SET TING

1. VOLT LIMIT SETTING

• VOLT LIMIT MAX (0 – Max. Voltage)

• VOLT LIMIT MIN (0 – Max. Voltage)

2. CURR LIMIT SETTING

• CURR LIMIT MAX (0 – Max. Current)

• CURR LIMIT MIN (0 – Max. Current)

3. VOLT SLEWRATE SETTING

• V SLEWRATE

4. CURR SLEWRATE SETTING

• I SLEWRATE

5. M EASU R E AV E RAG E (1-10)

6. LED MODE SETTING

• LED MODE (ON,OFF) 28

Note: All optional menu items appear only when their respective optional

Note: The menu cannot be accessed when the output(s) is turned ON or

• Low Current Mode (ON,OFF)**

3. PROTECTION

1. OVP SET TING

• OVP (ON,OFF)

• SET (0 – Max. Voltage)

2. OCP SETTING

• OCP (ON,OFF)

• SET (0 – Max. Current)

4. MEMORY SETTING(0-9)

5. PROGRAM MODE

6. TIMER FUNCTION

• TIMER (ON,OFF)

• TIME (hr:min:sec)

7. CALIBRATION

8. INFORMATION

9. CHAIN SETTING (optional)

• CHAIN ON/OFF (ON,OFF)

• CHAIN ADDRESS(1-31)

*Dual channel models 9173 and 9174 only. **Models 9184 and 9185 only.

interface cards are installed inside the power supply.

How to Access the Menu

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

when it is in remote mode (indicated by RMT light).

1. From the front panel, press to enter the main menu and the below screen will display. The on the bottom right indicates that there are more categories below that can be displayed.

1 . SYSTEM SETTING 2 . OUTPU T S ETTING

2. Press t o display those categories. T he on the upper right indicates that there are categories above the

current displayed categories shown. Press and the screen will display the previous menu categories.

4 . MEMORY SETTING 5 . PROGRAM MODE

3. Each main category, as well as some submenu items within the category, has a number next to their respective category heading. Whenever you see a number next to a menu item (i.e. 1. SYSTEM SETTING, 4. MEMORY SETTING), use the numeric keypad to enter that number to access that category’s menu or submenus. For example, press to access the SYSTEM SETTING menu.

4. Within the category menus or submenus, adjustable settings and parameters will have a cursor (indicated by an underline of a digit or character) to indicate the current selection. Use

Enter

the and keys to select the setting you want to change. Below is an example of the Remote settings being

selected. Note the underline below the first characte r of the setting “USB”.

REMOTE = USB GPIB ADDR = 1

KEY LOCK = OFF

5. Settings have selectable options that are not numeric (i.e. REMOTE settings shown above). To change them, press

or . To save the changes, press the key.

6. Parameters have numerical set values (i.e. GPIB ADDR parameter shown above). To change them, use the numeric keypad to enter the value you want to change to. To save the changes, press the key.

Note: Changes to settings and parameters appl y only when the

key is pressed to confirm the changes. Otherwise, they will default to previous set option or value.

Enter

3.2 Remote Interface Setup

The standard remote interface available on all models in the series is the USB (virtual COM) interface. Other optional supported interfaces such as GPIB, Ethernet (LAN), RS-232, and RS-485are available, but dependent on the interface card(s) installed on the instrument. This section will describe how to setup all the supported interfaces.

Note: The RMT LED will automatically light up when the power supply is successfully connected to a PC remotely through any remot e interface. Keys on the front panel will be locked until (LCL) is pressed to set the instrument back to LOCAL mode.

USB Interface (virtual COM)

The USB interface comes standard on every power supply in the series. A USB Type A to Type B cable (i.e. USB printer cable) is required to connect the USB port ( ) in the rear panel to a PC. Follow the steps below to setup the power supply for USB (virtual COM) remote communication.

1. Press , then to enter SYSTEM SETTING. Select REMOTE and verify that it shows USB, which is the default

option. If not, press or until “USB” is displayed. Press to save changes.

2. Insta ll the USB driver. Visit www.bkprecision.com to download the driver. Run the setup executable after unzipping the downloaded file.

Note: Do this before connecting the USB cable from the power supply to the PC.

3. Once the installation is successful, connect the USB cable between the power supply and the PC. Drivers should be automatically recognized. To verify, go to “Device Manager” in Windows, and under “Ports (COM & LPT)”, a new device listed as “210x USB to UART Bridge (COM#)” will be listed. The “#” is the COM port number assigned by your computer to interface with the instrument via USB virtual COM.

4. The serial (virtual COM) sett ings to use are:

BAUDRATE: 57600 PARITY: NONE DATA BITS: 8 STOP BI T: 1 FLOW CONTROL: NONE

STATIC

Allows you to configure a static IP address for the power supply.

Enter

GPIB Interface

GPIB interface is available when the LAN/GPIB card is installed in the “S1” or “S2” slots in the rear panel. To setup the power supply for GPIB interface, follow the steps below:

1. Press , then to enter SYSTEM SETTING. Select

REMOTE and press or until “GPIB” is displayed. Press to save changes.

2. Select GPIB ADDR and use the numeric keypad to enter the GPIB address (1 – 30). Press to save changes.

Ethernet (LAN) Interface

LAN interface is available when the LAN/GPIB card is installed in the “S1” or “S2” slots in the rear panel. To setup the power supply for LAN interface, follow the steps below:

1. Press , then to enter SYSTEM SETTING. Select

REMOTE and press or until “ETHERNET” is displayed. Press to save changes.

2. Select IP CONFIG and choose STATIC. Press to save changes.

Enter

3. If STATIC is selected, then select IP ADDRESS and use the numerical keypad to enter the static IP. After entering each group of 3 digits, press to go to the next group. The cursor will automatically move to the next group. Do this until all 12 digits are entered. Be sure to press one more time after entering the last 3 digits for the complete IP address entry to be saved.

RS-232 and RS-485 Interface (Optional)

Both RS-232 and RS-485 interface are supported by the power supply through an optional RS-232 or RS-485 interface card. Both of these card options must be properly installed before they can be used. See “1.7 Installing Optional Interface Cards” for details.

RS-232 Interface

The setup for remote control via RS-232 interface is very similar to the same for USB virtual COM interface. To setup the power supply for RS-232 operation:

1. Press , then to enter SYSTEM SETTING. Select

REMOTE and press or until “RS232” is displayed. Press to save changes.

2. The settings used for RS232 communication are:

BAUDRATE: 57600 PARITY: NONE DATA BITS: 8 STOP BI T: 1 FLOW CONTROL: NONE

RS-485 Interface

Multiple power supplies (up to 31) can be connected together in series and be controlled via USB (virtual COM) interface. Here is an illustration of how the setup will look like:

Figure 15- RS-485 Setup to Control Multiple Supplies (USB)

To setup and configure the power supplies, follow these steps:

Requirements:

- Optional RS485 cards must be installed on each power supply

- For N number of power supplies, you will need N-1 number of

Ethernet CAT5 straight (pin-to-pin) cables. (Example: To connect 5 power supplies, 4 cables are required)

Note:The cables are used to link the power supplies together.

possiblebetween each unit.

Note: The terminator switch should only be set to “On” for the

should have the terminator switch set to “Off”.

It is recommended to keep the cables as short as

Communicate via USB

1. Take one Ethernet CAT5 cable and connect one end to labeled “OUT” on the RS485 interface card of the first power supply (the one that will be connected to the PC via USB cable).

2. Connect the other end to labeled “IN” on the RS485 interface card of the second power supply.

3. To connect a third power supply, use another Ethernet CAT5 cable and connect one end to labeled “OUT” on the second power supply. Connect the other end to labeled “IN” on the interface card of the third power supply.

4. Repeat steps 2 and 3 for each subsequent power supplies added to the multi connection, making sure the connections follow the “IN” and “OUT” scheme as described.

5. After connecting to the “IN” port of the last power supply in the connection, if there are more than 10 units connected, set the physical switch labeled “Terminator” on the RS485 interface card of this last unit to “On”.

last power supply in the chain. All other power supplies

6. With a USB Type A to Type B cable, connect one end to the USB interface of the first power supply. Connect the other end to a PC to be used to control all the supplies. Refer to Figure 15 to verify your connections.

Enter

Esc

Enter

Esc

7. With the connections setup properly, on the first power supply, press , then to enter SYSTEM SETTING. Select REMOTE and verify that “USB” is selected. Press to save changes.

8. Press once to go back to the main menu and press to enter CHAIN SETTING.

9. Select CHAIN ON/OF F and press or to set it to “ON”. Press to save changes.

10. Select CHAIN ADDRESS and set it to “1”. Press to save changes and then press twice to exit the menu.

11. Repeat steps 7 thru 10 for each of the power supplies in the chain. However in step 10, set the CHAIN ADDRESS of each power supply to a different number. (i.e. Set to 1 for power supply #1, 2 for power supply #2, 3 for power supply #3, …etc.) The address is used to reference the power supply during remote operation.

12. Refer to “4.2 Remote Commands” for the list of remote commands specific for RS485 communication.

Options

Description

ALWAYS ON

Default – Display never dims.

1 MINS OFF

Display dims after 1 minute

5 MINS OFF

Display dims after 5 minutes

10 MINS OFF

Display dims after 10 minutes

30 MINS OFF

Display dims after 30 minutes

Enter

3.3 Adjusting LCD Display, Key Lock, Key

Sound

LCD Backlight Timer

The LCD backlight has a timer that can be set to dim its brightness within a set time from when the instrument is idle. To set this:

1. Press , then to enter SYSTEM SETTING. Select

LCD BACKLIT. Press or to change the backlight timer setting. Selectable options are:

2. Press to save changes.

Key Lock

Users can manually lock the front panel keypad. To set this:

1. Press , then to enter SYSTEM SETTING. Select

KEY LOCK. Press or to change it. Selectable options are:

Options

Description

OFF

Default

Lock keypad

Options

Description

Default

OFF

Disable key beep

Enter

Esc

Enter

2. Press to save changes. Press twice to exit the menu.

3. If ON is selected, all keys from the front panel, except for , will be locked. The Lock LED indicator will be lit.

4. To unlock, press and the Lock LED indicator will turn off. The KEY LOCK option under SYSTEM SETTING category will automatically default back to OFF.

Disabling Key Sound

To disable the beep from key presses:

1. Press , then to enter SYSTEM SETTING. Select

2. Change it to OFF, and press to save changes. All key

3. To enable it again, set BEEP to ON.

BEEP. Press or to change it. Selectable options are:

presses will no longer beep.

Options

Description

OFF

Default

Resets instrument with factory default settings and parameters

Enter

3.4 Restore to Factory Default

All instrument settings can be reset back to their factory default values by doing the following:

WARNING:

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

1. Press , then to enter SYSTEM SETTING. Select

RECALL DEFAULT. Press or to change it.

Selectable options are:

2. Change it to ON, and press . The following prompt will display:

ARE YOU SURE TO RECALL DEFAULT?

(YES/NO) NO

REMOTE

USB

GPIB ADDR

KEY LOCK

OFF

IP CONFIG

STATIC

IP A DDRE SS

255.255.255.255

BEEP

LCD BACKLIT

ALWAYS ON

VOLT LIMIT MAX

Max. rated voltage of model

VOLT LIMIT MIN

0.000V

CURR LIMIT MAX

Max. rated current of model

CURR LIMIT MIN

0.0005A

V SLEWRATE

7.000 V/ms

I SLEWRATE

0.6000 A/ms

MEASURE AVERAGE TIME

LED MODE

OFF

OVP SETTING

OFF, SET = Max. rated voltage of model

OCP SETTING

OFF, SET = Max. rated current of model

TIMER FUNCTION

OFF

Enter

3. To cancel this action, press with NO marked by the cursor. To confirm resetting the instrument to factory default,

press to select YES and press .

4. After approximately 5 seconds, the inst rument wi ll automatically jump back to the normal display. All settings are now set back to their factory default values.

Table 3 Factory Default Settings

Enter

Esc

3.5 Configure Voltage and Current Output

Voltage and Current Limit Settings

The power supply has software voltage and current limit protection settings that can be configured to limit the settable range for output from front panel or remote operation. Follow the steps in this section to adjust these settings.

Voltage Limit Set

1. Press , then to enter OUTPUT SETTING. Press to select VOLT LIMIT SETTING.

2. VOLT LIMIT MAX should be selected. Use the keypad to enter the maximum voltage set limit and press to save changes. The maximum voltage that can be set depends on the power supply’s maximum output voltage.

3. VOLT LIMIT MIN is now selected. Again, use the keypad to enter the minimum voltage set limit and press to save changes.

4. Press once to return to previous menu items, or press three times to exit the menu when finished.

Dual Channel Models

For models with dual channels, the display will look different, with CH1 and CH2 indicators on the left side of the display to indicate their respective VOLT LIMIT MAX/MIN parameters.

CH2 VOLT LIMIT MAX = _20.400 V

Enter

Esc

CH1 VOLT LIMIT MAX = _20.400 V CH1 VOLT LIMIT MIN = 0 V

CH2 VOLT LIMIT MIN = _ 0.000 V

Current Limit Set

1. Press , then to enter OUTPUT SETTING. Press to select CURR LIMIT SETTING.

2. CURR LIMIT MAX should be selected. Use the keypad to enter the maximum current set limit and press to save changes. The maximum current that can be set depends on the power supply’s maximum output current.

3. CURR LIMIT MIN is now selected. Again, use the keypad to enter the minimum current set limitand press to save changes.

4. Press once to return to previous menu items, or press three times to exit the menu when finished.

Dual Channel Models

For models with dual channels, the display will look different, with CH1 and CH2 indicators on the left side of the display to indicate their respective CURR LIMIT M AX/MIN parameters.

CH2 CURR LIMIT MAX = _10.200 A

Vset

Enter

CH1 CURR LIMIT MAX = _10.200 A CH1 CURR LIMIT MIN= 0.000 A

CH2 CURR LIMIT MIN = _ 0.000 A

Configure Voltage and Current Output

Voltage and current can be set and output from the front panel and the rear panel terminals. Refer to “3.7 Remote Sense” for setup instructions if remote sense will be used for voltage compensation at the output.

Setting Voltage

Follow the steps below to set the output voltage:

1. For single channel models, skip to step 2 below. For dual channel models, from the main display press or

to select the channel for setting voltage. The channel indicators CH1 or CH2 will flash to indicate the selected channel.

2. With the main display shown, press and use the numeric keypad to enter your set voltage. Then press . Below is an example screen for setting 5 V.

SET = 5.000 V

CH2 OFF 5 . 000 V 1 . 000 A

VOLT R ANGE = HIGH ( : H / : L )

OFF 5 . 000 V 1 . 000 A

For Dual Channel models:

CH1 OFF 5 . 000 V 1 . 000 A

3. Models 9184 and 9185 do not have auto ranging available. The range must be selected manually and can be set as HIGH or LOW range.

9184: HIGH range – 200 V / 1 A LOW range – 100 V / 2 A 9185: HIGH range – 600 V / 0.35 A LOW range – 400 V / 0.5 A

To select HIGH range, press from the normal display where VOLT RANGE is indicated.

OFF 200 . 00 V 1 . 000 A

To select LOW range, press instead.

Note:The voltage setting range is dependent on the unit’s

power supply.

VOLT RANGE = LOW ( : H / : L )

SET = 2.000 A

Iset

Enter

OFF100 . 00 V 2 . 000 A

maximum voltage output specification as well as the voltage limits set from the system menu. Verify VOLT LIMIT MAX and VOLT LIMIT MIN settings if you are unable to set a voltage within the specifications of the

Setting Current

Follow the steps below to set the output current:

1. For single channel models, skip to step 2 below. For dual channel models, from the main display press or

to select the channel for setting current. The channel indicators CH1 or CH2 will flash to indicate the selected channel.

2. With the main display shown, press and use the numeric keypad to enter your set current. Then press . Below is an example screen for setting 2 A.

OFF 5 . 000 V 2 . 000 A

Note: The current setting range is dependent on the unit’s

power supply.

SET = 2.000 A

CH2 OFF 5 . 000 V 2 . 000 A

For Dual Channel models:

CH1 OFF 5 . 000 V 2 . 000 A

3. Models 9184 and 9185 do not have auto ranging available. The range must be selected manually and can be set as HIGH or LOW range.

9184: HIGH range – 200 V / 1 A LOW range – 100 V / 2 A 9185: HIGH range – 600 V / 0.35 A LOW range – 400 V / 0.5 A

To select HIGH range, press from the normal display To select LOW range, press instead.

maximum current output specification as well as the current limits set from the system menu. Verify CURR LIMI T MAX and CURR LIMIT MIN settings if you are unable to set a current within the specifications of the

WARNING:

wires.

Enable/Disable Output

Before connecting wires to the front or rear panel output terminals, output should remain OFF to avoid shocks and damage to the device under test

The button is used to enable or disable the supply output from both the front panel and the rear panel output terminals. A green LED light next to the button will be lit when is

(DUT), especially when setting the supply for high voltage output. 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

OUTPUT

pressed to turn ON (enable), and the OFF annunciator will disappear from the display. This will reappear when output is OFF (disable) upon pressing again, and the green LED light will disappear. For dual channel models, and are used in place of as output ON/OFF for CH1 and CH2 respectively. Dual channel models can also be configured so that both channels’ output states (ON or OFF) can be synchronized. See “

3.6Dual Channel Configurations” under “Multi/Single Output

Control” for setup instructions.

OUTPUT

CH1

CH2

Note:The voltage setting range is dependent on the unit’s

voltage limits set from the system menu. Verify VOLT

CH2CV5 . 000 V1 . 000 A

Enter

Controlling Voltage/Current Output with Keys

When the output is ON (enabled), the voltage (CV mode) or current (CC mode) output can be controlled incrementally by key presses.

To do this, press or and a cursor will appear, highlighting the

last digit of the measured voltage or current display. Use or to change and select the digit you want to change, and press

or to increase or decrease that digit. The output voltage or current will change immediately as you change the digits. Press

at any time or allow the supply to idle for 10 seconds (without any key presses) to go back to the normal display.

5 . 000 V1 . 000 A

For Dual Channel models:

CH1CV5 . 000 V1 . 000 A

maximum voltage output specification as well as the

LIMI T MAX and VOLT LIMIT MIN settings if you are power supply.

Enter

Esc

unable to set a voltage within the specific ations of the

Slew Rate Configuration

Voltage and current slew rate of the output can be configured by doing the following:

1. Press , then to enter OUTPUT SETTING. Press to select VOLT SLEWRATE SETTING. The following will be displayed:

V SLEWRATE = _ 7.000 V / ms

For Dual Channel models:

CH1 V SLEWRATE = _ 7.000 V / ms CH2 V SLEWRATE = _ 7.000 V / ms

2. Use the keypad to enter the voltage slew rate. (Refe r to Table 4) Then press the save the changes.

3. Press once to return to the previous menu items, and press to select CURR SLEWRATE SETTING. The following will be displayed:

Model

V Slew Rate (V/ms)

I Slew Rate (A/ms)

9171

0.001 – 2.500

0.001 – 1.250

9172

0.001 – 7.000

0.001 – 0.300

9173

0.001 – 2.500

0.001 – 1.250

9174

0.001 – 7.000

0.001 – 0.300

9181

0.001 – 4.500

0.001 – 1.000

9182

0.001 – 2.500

9183

0.001 – 7.000

0.001 – 0.600

9184

0.001 – 6.666

0.001 – 0.066

9185

0.001 – 15.00

0.001 – 0.0125

Enter

Esc

I SLEWRATE = _ 0.600 A / ms

For Dual Channel models:

CH1 I SLEWRATE = _ 0.600 A / ms CH2 I SLEWRATE = _ 0.600 A / ms

4. Use the keypad to enter the current slew rate, then press to save changes.

5. Press once to return to previous menu items, or press three times to exit the menu when finished.

Table 4- Voltage and Current Slew Rate Ranges

Enter

Esc

Output Timer Function

The power supply has a built-in output timer function that can be enabled to allow setting a time in which output is remained ON. Follow the steps below to setup this function:

1. Press , then to select TIMER FUNCTION. The following screen will be displayed:

TIMER = OFF TIME = 0 Hr 0 Min 0 Sec

2. While the cursor is selecting TIMER, press so that ON is selected, then press to set and selectTIME. This will be the time for which the output will remain ON.

3. Use the numeric keypad to enter the Hr (hour) for the output to remain ON. Press to select Min (minute). Enter a value and press again t o select Sec (second).

4. The acceptable ranges are: Hr: 0 – 999, Min: 0 – 59, Sec: 0 – 59

5. Press once to return to previous menu items, or press three times to exit the menu when finished.

6. Upon returning to the main display, it will show the following:

Note:For dual channel models, the timer function will work only

by both channels.

TIMER = 000 : 00 : 00 Sec

10 . 000 V1 . 000 A

OFF10 . 000 V1 . 000 A

For Dual Channel models:

CH1OFF10 . 000 V1 . 000 A

CH2OFF

7. Press ( or for dual channel models) to

OUTPUT CH1

turn the output ON, and the TIMER on the display will start running. The ON annunciator will display, and the output will remain ON until the configured time period (from step 3)

CH2

ends.

with both channels ON (enabled) simultaneously regardless of the OUTPUT MODE setting configured in SYSTEM SETTING menu. The internal timer is shared

Enter

Esc

Measurement Average Setting

The averaging measurements used to display a reading can be adjusted by following the stepsbelow:

1. Press , then to enter OUTPUT SETTING. Press to select MEASURE AVERAGE. The following will display:

AVERAGE TIME = _ 2

2. Use the numeric keypad to enter the number of measurements the instrument will average out prior to displaying the value. Valid numbers are from 1 to 10.

3. Press to save changes, then press three times to exit the menu.

3.6 Dual Channel Configurations

Features described in this section pertain to dual channel models 9173 and 9174 only. They are not available for all other models.

Multi/Single Output Control

Dual channel outputs can be configured so that pressing the output buttons can turn ON (enable) or OFF (disable) both channels’ outputs simultaneously.

Enter

Esc

Enter

Esc

Note: When multiple output control is setup, there will be a maximum of 3

ms delay between channel 1 and channel 2 when both channels change output from OFF (disable) state to ON (enable) state.

Follow the steps below to configure this setting:

1. Press , then to enter SYSTEM SETTING. Go down the list of settings and select OUTPUT MODE.

2. Press to select MULTI. Press to confirm the changes, and press twice to exit the menu. If SINGLE is selected, output control of the two channels will not be simultaneous; their output states can be controlled independently.

Series/Parallel Tracking Mode

Tracking mode can be enabled so that both channels can be synchronized, especially when connected together in series or parallel. To tur n on tracking mode, follow the steps here:

1. Press , then to enter SYSTEM SETTING. Go down the list of settings and select TRACKING MODE.

2. Press to select ON. Press to confirm the changes, and press twice to exit the menu. To disable it, select OFF.

TRK

10 . 000 V 1 . 000 A

3. The TRK annunciator will appear on the display to indicate tracking mode is enabled. Both channels are now synchronized.

CH1OFF 10 . 000 V 1 . 000 A

CH2OFF

3.7 Remote Sense

Single channel models 9171, 9172, 9181, 9182, and 9183 have both front and rear panel remote sense terminals. Dual channel models 9173 and 9174, and high voltage single channel models 9184 and 9185 have rear panel remote sense terminals only. Remote sense can be used to compensate for voltage drops due to resistance from test leads connected to your device under test (DUT), thus providing more accurate output voltage. The power supply is initially setup to local sense mode by default. Refer to the following sections for details of local and remote sense setup.

Local Sense

All power supplies are setup with local sense by default. In local sense mode, shorting bars between the sense terminals and output terminals are connected on the front panel (if available) and rear panel outputs. Refer to Figure 16 below (Note: Some models do not have front panel sense terminals, indicated by +S and -S):

- - -

+S + - -S

Front Panel Shorting Bar

Rear Panel Shorting Bar

Figure 16-Local Sense with Shorting Bar

For front panel, +S and + terminals are shorted together, and –S and – terminals are shorted together with shorting bars. For rear panel, +S and + (next to +S) are shorted together, and –S and – (next to –S) are shorted together with small metal shorting bars.

Note:For calibration, local sense should be used.

Remote Sense

To setup and use remote sense from the front panel (if available), both the front panel and rear panel shorting bars must be removed. The front +S and –S sense ports are then connected directly to the DUT, like Figure 17 below:

WARNING:

internally and cause damage to the supply.

Figure 17- Front Panel Remote Sense Setup

To use remote sense from the rear panel, both front panel (if available) and rear panel shorting bars must also be removed. The rear +S and –S ports are connected directly to the DUT, like Figure 18 below:

Figure 18- Rear Panel Remote Sense Setup

In remote sense where both the front and/or rear panel shorting bars are removed, never connect a device directly to the front (if applicable) and/or back +S and –S terminals only. Always connect the + and – terminals first, then connect the +S and – S terminals. Otherwise, the sense lines will burn out

DO NOT CONNECT LIKE BELOW:

For operating with output current higher than 10 A, the connection is the same as Figure 18 above, with the addition of connecting the second pair of (+) and (-) terminals in the rear panel, like below:

WARNING:

power supply.

- - S

Rear Panel Output

Remove Shorting bars

+ -

+S + - -S

Remove shorting bars

Front Panel Output

Rear Panel Output

DUT

Figure 19- Remote Sense Setup for 10A or Higher Current Output Operation

DO NOT output 10A or more with only one pair of (+) and (-) terminals in the rear panel. Both (+) terminals and both (-) terminals must all be connected for applications requiring more than 10A output. Each terminal can only accept maximum of 10A. Exceeding this may damage the

LED MODE = ON

Enter

Esc

3.8 LED and Low Current Test Modes

LED Mode

All of these power supplies have LED mode, which enables them to function specifically for LED test applications. When this mode is ON (enabled), the power supply can operate in such a way as to minimize or almost eliminate the inrush current drawn by the LED load, which normally exists when the output switches from an OFF state to an ON state.

To enable LED mode, follow these steps:

1. Press , then to enter OUTPUT SETTING. Press to select LED MODE SETTING.

2. Press to select ON, then press to confirm the changes. Press twice to exit the menu. For dual channel models, both channels will have LED mode enabled.

Consider the following example for 9184 with setup in Figure 22:

Inrush current

LED Mode OFF (disabled)

LED Mode ON (enabled)

Output ON

Figure 20- LED Testing Example

The 9184 supply output is initially OFF (disabled). The LED light bar is rated for 170 V. A 10 Ω resistor is placed in series with the LED light bar. The power supply current setting (ISET) is 20 mA. Using an oscilloscope to probe between the resistor to measure current, the power supply’s output is then turned ON. The measured results are shown in Figure 21, which compares the measured results with and without LED mode ON (enabled):

Figure 21 - Inrush Current With and Without LED Mode Enabled

With LED mode ON (enabled), the power supply can minimize or eliminate any inrush current from turning the output ON, which in turn will minimize damage or life of the LEDs under test.

Note: For LED mode to function correctly, the output must be turned

OFF when connecting between the power supply and the LEDs under test. Turn ON the output after LED mode is enabled and all other settings are configured.

WARNING:

For models 9184 and 9185, Low Current MODE must be set to OFF when using LED mode. If both are ON, the supply may produce inrush current.

Low Current Mode

Available on models 9184 and 9185 onl y. Low current mode is a unique function that enables the power supply to minimize voltage rise times when operating with low current (< 1 A) output with a high voltage change.

To enable Low current mode, follow these steps:

1. Press , then to enter OUTPUT SETTING. Press to select Low Current MODE.

LED MODE = OFF

Low Current Mode

Low Current Mode ON

Enter

Esc

2. Press to select ON, then press to confirm the changes. Press twice to exit the menu.

Low Current MODE = ON

Consider the following example screenshots measuring a voltage chance from 0 V to 60 V with a load of 100 m A connected to the output.

20 ms

Figure 22 - Inrush Current With and Without LED Mode Enabled

When operating with low current output, enabling Low Current mode can reduce the voltage rise time upon a change in the voltage output.

OFF

OVP = ON SET = 70.000 V

CH1 OVP = ON SET = 70.000 V

3.9 Output Protection

Configure OVP

Overvoltage protection (OVP) is available to limit the voltage output and to protect a connected DUT from an overvoltage condition. When the power supply trips the OVP, a short beep will sound and the OVP (OVP1/OVP2 for dual channel models) LED indicator on the front panel will be lit. The green output light will also disappear and output will turn OFF (disable) immediately. To clear the OVP trip, press any key and the OVP (OVP1/OVP2 for dual channel models) LED indicator will turn OFF. To activate OVP, follow the steps below:

1. Press , then to enter PROTECTION, and press to select OVP SETTING.

For Dual Channel models:

CH2 OVP = OFF SET = 70.000 V

OCP = ON SET = 10.000 A

Enter

Esc

Enter

2. Press to select ON. Press to confirm the changes, and use the numeric keypad to set the voltage limit for the protection to trip. Press again to save changes. When the power supply voltage output reaches this limit, the OVP will trip.

3. Press twice to exit the menu. To disable it, select OFF.

Configure OCP

Overcurrent protection (OCP) is available to limit the current output and to protect a connected DUT from an overcurrent condition. When the power supply trips the OCP, a short beep will sound and the OCP (OCP1/OCP2 for dual channel models) LED indicator on the front panel will be lit. The green output light will also disappear and output will turn OFF (disable) immediately. To clear the OCP trip, press any key and the OCP (OCP1/ OC P2 for dual channel models) LED indicator will turn OFF. To activate OCP, follow the steps below:

1. Press , then to enter PROTECTION, and press to select OCP SETTING.

CH1 OCP = ON SET = 10.000 A

Enter

Esc

Enter

For Dual Channel models:

CH2 OCP = OFF SET = 10.000 A

2. Press to select ON. Press to confirm the changes, and use the numeric keypad to set the current limit for the protection to trip. Press again to save changes. When the power supply current output reaches this limit, the OCP will trip.

3. Press twice to exit the menu. To disable it, select OFF.

3.10 Save/Recall Output Settings

The power supply has internal memory to store up to 10 settings, and each setting includes the set voltage (VSET) and set current (ISET) values.

Save Output Settings

Follow these steps to save settings:

1. Press , then to enter MEMO RY SETTING. The following screen will bedisplayed:

MEM = 0

Enter

V = 0.000 V I = 0.000 A

For Dual Channel models:

CH1 V = 0.000 V I = 0.000 A CH2 V = 0.000 V I = 0.000 A

2. Press or or use the keypad to select the memory location to store settings into. Choose between 0 – 9.

3. Press to set, and use the keypad to enter a value for voltage. Afterwards, press and enter a value for current. Press once more and the voltage and current values will be stored into the selected memory location.

4. The cursor will then automatically move back to select MEM, and the location number will automatically increment to the next, except if number 9 (last memory location) was previously selected.

5. For dual channel models, repeat step 3 twice, once for CH1 and for CH2. Each memory location will store both channels’ voltage and current settings.

RECALL =

10 . 000 V 1 . 000 A

RCL

Recall Output Settings

To recall a saved setting:

1. Press and the screen will display as follows:

OFF 0.000 V 0.000 A

For Dual Channel models:

CH1OFF 10 . 000 V 1 . 000 A

CH2OFF

2. Use the keypad to enter the memory location that contains the voltage and current values to recall. The voltage and current settings will change immediately to the recalled settings.

Configure Power-On State

The power supply can be powered up to a last known state, which can be useful in the case of power interruption. To configure this, follow the steps below:

1. Press , then to enter SYSTEM SETTING. Select

POWER ON STATE. Press or to change it to LAST

Enter

for setting the power on state to last known configuration. Select OFF to turn it off.

2. Press to confirm the change.

3.11 Sequence Program Mode

Up to 10 (1 – 10) programmed sequences can be stored into the internal memory of the power supply and be executed from the front panel or via remote commands. A sequence consists of various steps of voltage and current values with a user defined time to hold at each step. This allows the user to change the vol tage and current output of the power supply at different timings in a sequence. The

maximum number of steps per sequence is 150, and the minimum timing in between steps is 10 ms. For dual channel models, the programmed sequence will control both channels per every step. Programming a sequence for each channel independently is not supported.

Sequences must be programmed into the memory via remote interface (i.e. USB, GPIB, Ethernet) before it can be executed from the front panel. See “4 Remote Operation” for details.

Assuming that sequences are already programmed into the internal memory, follow these steps to execute a program.

1. Press , then to enter PROGRAM MODE. The following screen will be displayed:

PROGRAM NUMBER = 0

Enter

CH2

PROGRAM OFF

2. Use the keypad to select the program number where the sequence is stored. Valid number is 1 – 10. Press to confirm the program.

3. Press ( or for dual channel models) to

OUTPUT CH1

enable the output and execute the programmed sequence. For dual channel models, both outputs will turn ON.

4. To disable the sequence at any time, press

CH1

( or for dual channel models) again. This will also

CH2

OUTPUT

turn OFF the output. For dual channel models, both outputs will be OFF.

3.12 External Analog Control

The power supply output(s) can be controlled by external DC voltage sources (0 – 5 V or 0 – 10 V) or resistances (0 – 5kΩ). The

optional DIO/Analog Card must be installed for this function to be available.

Note: The external control circuit uses a 12-bit D/A converter, thus

resolution for voltage and current is limited to 10 mV and 10 mA respectively.

WARNING:

calibration.

WARNING:

terminals together as it may damage the instrument.

The terminals for external analog control of voltage and current have no input protection. Therefore take caution when connecting to a DC source or a resistance. For voltage source control, do not input a voltage outside of the range -0.7 V to 5.7 V for the 0-5 V scale, or -0.7 V to 10.7 V for 0-10 V scale. This will damage the supply. For resistance control, do not connect with resistance greater than 5 kΩ. Doing so may damage the instrument and cause it to go out of

External analog control inputs do not have reverse polarity protection. Therefore, for external voltage control, do not connect to a live DC source until verifying that the positive side is connected properly to the (+) terminal and negative side to the (-) terminal for both current and voltage. Never short the (+) and (-)

Voltage Control

You can select the voltage control scale between 0 – 5 V or 0 – 10 V, with 5 V and 10 V setting the maximum voltage/current output respectively, and 0 V being the minimum voltage/current output, which is 0 V/0 A(The scale factor is linear to the full scale voltage/current output). With model 9172 (rated 35V/3A, 70V/1.5A) as an example, using the 0 – 10 V scale and applying 0 V input for V will output 0 V. Applying 10 V input for V will output 35 V or 70 V depending on the range. Likewise, 10 V for I will set current to 3A or

1.5 A depending on the range. See the setup below:

+ - +

EXT CTL

Dual channel DIO/Analog Card

Single

+ -

0 – 5 V

0 – 10 V

0 – 5 V

0 – 10 V

channel DIO/Analog Card

Figure 23- External V olt ag e Cont rol

Note: Two separate DC voltage sources must be used for the setup.

One for controlling voltage and one for current. Using one for either voltage or current will not operate correctly. If source is used for voltage, current setting will remain 0. If source is used for current, voltage setting will remain 0.

Resistance Control

You can externally control the voltage/current output with variable resistances 0 – 5 kΩ. 5kΩ sets the maximum voltage/current output, and 0 kΩ will set the minimum voltage/current output, which is 0 V/0 A (The scale factor is linear to the full scale voltage/current output).

+ - +

EXT CTL

Dual channel DIO/Analog Card

Single

See the setup below:

channel DIO/Analog Card

Figure 24- External Resistance Control

0 – 5 kΩ 0 – 5 kΩ

Note: Two separate variable resistances must be used for the setup.

One for controlling voltage and one for current. Using one for either voltage or current will not operate correctly. If resistance is used for voltage, current setting will remain 0. If resistance is used for current, voltage setting will remain 0.

Follow the steps below to setup the supply for external analog control:

1. Press , then to enter SYSTEM SETTING.

Enter

Esc

2. Go down to EXTERN CONTROL (this option is only

available with DIO/Analog Card installed) and press or

to select between OFF, VOLT, or RES. Select VOLT for external voltage control or RES for external resistance control. Select OFF to disable external analog control.

3. Press to save the change. If VOLT is selected in the previous step, go to EXTERN LEVEL setting right below

EXTERN CONTROL and press or t o select between 5V or 10V. Selecting 5V means a 0 – 5V source will be used to control the full range of the voltage/current. Similarly, 10V means a 0 – 10V source will be used.

4. Press again to save the change, and press twice to go to the main screen, which will look like the following below (Note that voltage and current resolution will be 10 mV and 10 mA for external analog control):

OFF 0.00 V 0.00 A

For Dual Channel models:

CH2OFF 0.00 V 0.00 A

CH1OFF 0.00 V 0.00 A

5. Press to turn the output ON (enabled), and output voltage and current will change as your external DC voltage sources or resistances change.

Note: When external analog control is enabled, all front panel keys are

locked except for and ( or for dual channel models). Output voltage and current is locked to be controlled with the connected external voltage sources or resistances only. To return to normal control and display mode, follow the steps above to disable external analog control.

OUTPUT

OUTPUT CH1 CH2

3.13 Digital I/O

Digital I/O functions are suppor t ed with the DIO/Analog card installed.

The instrument uses a DB-9 9-pin interface for digital I/O operations. A total of 9 pins are available, 8 of which can be configured as INPUT or OUTPUT and 1 for ground (GND) via remote commands (Refer to Table 5). The maximum voltage for input is 5 V, and maximum voltage for output from the supply is also 5 V.

Pin#

9 8 7 6 5 4 3 2 1

Type

I/O

GND

I/O

Binary Bit #

7 6 5 4 - 3 2 1 0

Decimal

Representation

I/O – Can be set to either input or output. GND – Ground pin

WARNING:

warranty.

Dual Channel DIO/Analog Card

Single

1 2 3 4 5 6 7 8 9

Channel DIO/Analog Card

Figure 25- Digital I/O Interface

Below are the pin assignments for each of the 9 pins.

Table 5- Digital I/O Pin Assignment

128 64 32 16 8 4 2 1

Do not input more than 5 V to any of the digital I/O pins. Doing so may damage the instrument and void its

9 8 7 6 5 4 3 2 1 1 1 0 1 - 0 1 0 0

INPUT

Digital input for representing logic hig h (1) is 5 V, and for logic low (0) is 0 V.

Minimum voltage for logic high (1) must be at least 3.15 V. Maximum voltage for logic low (0) must not exceed 1.35 V.

To se tup any of the 8 pins (except pin 5) as input pins, the rem ote command GPIO:DIR is used. All pins (except pin 5) are represented as 8-bits binary, according to Table 5 above. A “1” represents OUTPUT, and a “0” represents INPUT. When using the GPIO:DIR command, the decimal representation of the 8-bits binary is used.

For example, to set pins 7, 4, 2 and 1 as INPUT pins, their values must be set to 0, and the rest 1. Send:

GPIO:DIR 212

212 is used to represent11010100 in binary. Only pins 7, 4, 2, and 1

have the value “0”, which represents INPUT.

To check the status of the input pins to be either 5 V (1) or 0 V (0), use the GPIO? query command. It will return the decimal representation of the 8-bits binary that represents all the pins. The pins with bit value “1” have 5 V at the input, and “0” for 0 V at input.

9 8 7 6 5 4 3 2 1 0 0 0 0 - 0 0 1 1

9 8 7 6 5 4 3 2 1 0 1 0 1 - 0 1 0 0

For example, suppose all pins are set as INPUT pins, but only pin 2 and 1 have a 5 V logic high (1) signal, then only these two pins return “1” and the rest “0”. Sending GPIO? command will return: 3. The complete 8-bit binary would be 00000011.

Note if there are output pins configured, those pins are ignored and will have the value “0”.

OUTPUT

To setup any of the 8 pins (except pin 5) as output pins, the remote command GPIO:DIR is used. All pins (except pin 5) are represented as 8-bits binary, according to Table 5 above. A “1” represents OUTPUT, and a “0” represents INPUT. When using the GPIO:DIR command, the decimal representation of the 8-bits binary is used.

For example, to set pins 8, 6, and 3 as OUTPUT pins, their values must be set to 1, and the rest 0. Send:

GPIO:DIR 84

84 is used to represent 01010100 in binary. Only pins 8, 6, and 3

have the value “1”, which represents OUTPUT.

Digital output for representing logic high (1) is 5 V, and for logic low

9 8 7 6 5 4 3 2 1 0 1 0 0 - 0 1 0 0

Error Message

Description

The input value is out of the settable range of the power supply.

(0) is 0 V. To set an output pin’s logic level, use the GPIO remote command. Again, all pins (except pin 5) are represented as 8-bits binary, according to Table 5 above. When using the GPIO command, the decimal representation of the 8-bits binary is used.

Taking the example above with pins 8, 6, and 3 set as OUTPUT pins, if pins 8 and 3 are to be set with logic high (5 V) and pin 6 set with logic low (0 V), send the following command:

GPIO 68

68 is used to represent 01000100 in binary. Only pins 8 and 3 have

the value “1” to represent logic high and output 5 V. Pin 6 has the value “0” to represent logic low and output 0 V. All other pins should be “0” as they are input pins and thus, are ignored.

3.14 Display Errors

The following errors may be displayed under certain operating conditions. Their descriptions are shown in the table below.

INPUT RANGE ERROR! TURN OFF OUTPUT FIRST Disable output first before accessing menu.

3.15 Connecting in Series and Parallel

Some of the models in the series are capable of connecting to another model of the same kind in series or in parallel to double the voltage output or current output respectively. While these are possible for some models, some models cannot be connected in such a way. Please see the below list of warnings pertaining to such connections.

WARNING:

• Do not connect multiple units of models 9184 or 9185 in series or in parallel. Due to their high voltage output design, these cannot be configured to increase voltage or current in a series connection or parallel connection setup respectively.

• Only connect multiples units in series or parallel of the same model. Do not mix models together. For example, you can connect two 9171 together, but not 9171 and 9172 together.

• Do not connect more than 2 units of models 9174 when series/parallel tracking is used.

• Do not connect more than 3 units of models 9172 and

9183.

• Never connect more than 4 units at a time in series or parallel.

• Total voltage output can never exceed maximum 240 V.

• Do not use rear output terminals when connecting

multiple units in series or in parallel. Use front panel output terminals only.

• When increasing the total output current by connecting multiple units in parallel, be sure that the connecting wires have enough thickness to handle the amount of current. Otherwise, they may overheat and/or drop voltage levels significantly.

1 2 3 4 5 6 7 8 9

Figure 26- RS-232 Interface

4 Remote Operation

4.1 Interface Connection

USB (Virtual COM) & RS-232

All models have a standard USB interface (virtual COM) that can be used for remote communication. Optionally, an RS232 interface card is available for remote control via RS-232 interface. Both USB (virtual COM) and RS-232 have the same serial settings listed below:

BAUDRATE: 57600 PARITY: NONE DATA BITS: 8 STOP BI T: 1 FLOW CONTROL: NONE

For RS-232 connectivity, refer to the diagram below for pin out information:

Description

Transmit Data

Receive Data

4 - 5

GND 6 -

Table 6- RS-232 Pin Out

A straight pin-to-pin DB9female t o DB9male serial cable is required for using RS-232 interface. Do not use a null modem or crossover DB9 serial cable.

GPIB

GPIB option is available when the supply is installed with the optional LAN/GPIB interface card. Each model can be configured with a GPIB address from 1 – 30. To communicate via GPIB, connect a GPIB cable to the GPIB interface of the LAN/GPIB interface card, as illustrated below.

Figure 27- GPIB Interface

Ethernet (LAN)

Ethernet (LAN) option is available when the supply is installed with the optional LAN/GPIB interface card. There are three ways to control the power supply via LAN interface: Web s er ver, Telnet connection, Socket connection.

Web Server

There is an embedded web server GUI that can access the power supply via LAN interface using a java enabled web browser. The GUI provides a simple way of setting voltage and current, as well as monitoring the output, using a web browser from a computer connected to the same local area network as the power supply. To access this, do the following:

1. On the computer, open up a java-enabled web browser.

2. From the power supply menu, copy down the IP ADDRESS that you or the server configured and type in that address in the URL bar of your browser with http:// prefix (i.e. http://192.168.1.150 for IP Address 192.168.1.150)

3. If correctly configured, the following sc r een will be shown:

Home

Provides general information of the power supply:

MAC Address, IP Address, Firmware Version.

Configuration

Allows users to configure: OVP Setting, OCP Setting,

because it cannot be override.

Status

Shows last error or warning messages from the power

error(s).

Web Control

Allows the user to manually send remote commands (see “4Remote Operation” for details) and control: Vset,

4. A password is required to login and access any of the menu items on the page. DEFAULT ADMIN PASSWORD:123456

Menu Items

This table describes each of the menu items available on the left frame of the web browser GUI.

Table 7- Web Browser M enu Description

Model Number, Manufacturer, Short Description,

LCD Backlight, *Change Password.

*Be sure to remember the new password if changed

supply. It should n o rmally be 0, which means no

Iset, Output state, Output On Ti m er.

Figure 28 Configuration Page Screenshot

Figure 29 Web Control Page Screenshot

Telnet Connection

The power supply can be connected via Ethernet (LAN) interface using Telnet client with the following port:

Telnet Port: 5024

Windows XP Users

1. Open a command prompt window, which can be found by going to Start > All Programs > Accessories > Command Prompt. Alternatively, you can click on Start, select Run…, and type in cmd in the Open: input box. Click OK to open Command Prompt.

2. At the prompt, type in Telnet<sp><device IP><sp>5024 where:

<sp>is a space. <device IP>is the IP address you have configured for the

power supply.(see “Ethernet (LAN) Interface” for details) Example: Telnet 192.168.1.150 5024

3. The following scree n will be displayed, and users can enter remote commands at the prompt, such as *IDN?.

BK Precision 9172, 9173, 9181, 9182, 9183 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1 General Information

1.1 Product Overview

1.2 Package Contents

1.3 Front Panel Overview

Front Panel Description

1.4 Rear Panel Overview

Rear Panel Description

1.5 Optional Accessories

Interface Card Options

Rack mount Options

1.6 Display Overview

Display Description

1.7 Installing Optional Interface Cards

How to Install Interface Cards

Removing Interface Cards

1.8 Rackmount Installation

2 Getting Started

2.1 Input Power and Fuse Requirements

Input Power

Fuse Requirements

2.2 Line Voltage Selection

2.3 Output Connections

2.4 Preliminary Check

Output Check

Voltage Check

Current Check

Check Model and Firmware Version

3 Front Panel Operation

3.1 Menu Options

How to Access the Menu

3.2 Remote Interface Setup

USB Interface (virtual COM)

GPIB Interface

Ethernet (LAN) Interface

RS-232 and RS-485 Interface (Optional)

RS-232 Interface

RS-485 Interface

Communicate via USB

LCD Backlight Timer

Key Lock

Disabling Key Sound

3.4 Restore to Factory Default

3.5 Configure Voltage and Current Output

Voltage and Current Limit Settings

Voltage Limit Set

Dual Channel Models

Current Limit Set

Dual Channel Models

Configure Voltage and Current Output

Setting Voltage

Setting Current

Enable/Disable Output

Controlling Voltage/Current Output with Keys

Slew Rate Configuration

Output Timer Function

Measurement Average Setting

3.6 Dual Channel Configurations

Multi/Single Output Control

Series/Parallel Tracking Mode

3.7 Remote Sense

Local Sense

Remote Sense

3.8 LED and Low Current Test Modes

LED Mode

Low Current Mode

3.9 Output Protection

Configure OVP

Configure OCP

3.10 Save/Recall Output Settings

Save Output Settings

Recall Output Settings

Configure Power-On State

3.11 Sequence Program Mode

3.12 External Analog Control

Voltage Control

Resistance Control