B&K Precision 9141, 9140 User manual

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Safety Summary

The following safety precautions apply to both operating and maintenance personnel and must be followed
during all phases of operation, service, and repair of this instrument.

Before applying power to this instrument:

• Read and understand the safety and operational information in this manual.

• Apply all the listed safety precautions.

• Verify that the voltage selector at the line power cord input is set to the correct line voltage. Operating
the instrument at an incorrect line voltage will void the warranty.

• Make all connections to the instrument before applying power.

• Do not operate the instrument in ways not specied 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 denes 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 denes 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.

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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 is specied
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 115 V RMS or 230 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 properly­grounded approved outlet and the recommended three-conductor AC line power cable may result in
injury or death.

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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 ammable
atmosphere.

Do not operate the instrument in the presence of ammable gases or vapors, fumes, or nely-divided
particulates.

The instrument is designed to be used in oce-type indoor environments. Do not operate the instrument

• In the presence of noxious, corrosive, or ammable fumes, gases, vapors, chemicals, or nely-divided
particulates.

• In relative humidity conditions outside the instrument’s specications.

• In environments where there is a danger of any liquid being spilled on the instrument or where any
liquid can condense on the instrument.

• In air temperatures exceeding the specied operating temperatures.

• In atmospheric pressures outside the specied altitude limits or where the surrounding gas is not air.

• In environments with restricted cooling air ow, even if the air temperatures are within specications.

• 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 20% to 80% relative humidity, with no condensation allowed.
Measurements made by this instrument may be outside specications if the instrument is used in non­oce-type environments. Such environments may include rapid temperature or humidity changes, sunlight,
vibration and/or mechanical shocks, acoustic noise, electrical noise, strong electric elds, or strong
magnetic elds.

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

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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 qualied service-trained maintenance personnel who are aware of the
hazards involved when the instrument’s covers and shields are removed. Under certain conditions,
even with the power cord removed, dangerous voltages may exist when the covers are removed. To
avoid injuries, always disconnect the power cord from the instrument, disconnect all other connections
(for example, test leads, computer interface cables, etc.), discharge all circuits, and verify there are
no hazardous voltages present on any conductors by measurements with a properly-operating voltage­sensing 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 rst 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 must be done by qualied service-trained maintenance personnel who are aware of
the instrument’s fuse requirements and safe replacement procedures. Disconnect the instrument from

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the power line before replacing fuses. Replace fuses only with new fuses of the fuse types, voltage
ratings, and current ratings specied 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 re. Failure to use the specied 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.

For continued safe use of the instrument

• Do not place heavy objects on the instrument.

• Do not obstruct cooling air ow 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.

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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Safety Symbols

Symbol Description

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

Indicates a hazardous situation which, if not avoided, could result in death or
serious injury.

Indicates a hazardous situation which, if not avoided, will result in minor or
moderate injury.

Refer to the text near the symbol.

Electric Shock hazard

Alternating current (AC)

7

Chassis ground

Earth ground

Indicates the In position of the power switch when instrument is ON.

Indicates the Out position of the power switch when instrument is OFF.

Indicates practices not related to physical injury.

Table 1 Safety Symbols

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Contents

1 Introduction 11

1.1 Product Overview 11

1.2 Contents 12

1.3 Features 12

1.4 Dimensions 13

1.5 Rackmount Installation 14

1.6 Front Panel 15

1.7 Display 16

1.8 Rear Panel 17

2 Getting Started 18

2.1 Input Power and Fuse Requirements 18

2.2 Fuse Requirements 19

2.3 Check or Replace Fuse 19

2.4 Preliminary Check 21

2.5 Self test Errors 22

3 Basic Front Panel Operation 23

3.1 Keys 23

3.1.1 Main Keys 23

3.1.2 Soft Keys 24

3.1.3 Numeric Keys 24

3.1.4 Output Control 24

3.2 Display 25

3.3 Check Model and Firmware Version 28

3.4 Setting Voltage and Current 29

4 Output Conguration 30

4.1 Protection Settings 30

4.1.1 Over Voltage Protection (OVP) 30

4.1.2 Over Current Protection (OCP) 30

4.1.3 Over Temperature Protection & Over Temperature Warning (OTP & OTW) 30

4.1.4 Vmax/Vmin 31

4.1.5 Protection Clear 31

4.2 Output Settings 31

4.2.1 Remote Sense 31

4.2.2 Output Timer 32

4.2.3 Voltage Slew 33

4.2.4 Current Slew 33

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4.2.5 On/O Delay 33

4.3 Operating Mode and Coupling 34

4.3.1 Normal Mode 34

4.3.2 Series Mode 36

5 List Mode 47

5.1 List Setup 47

5.2 Edit List 49

5.2.1 Load/Save List 50

5.2.1 List Number 51

5.2.2 Next 52

5.2.3 Repeat 52

5.2.4 Steps 52

5.3 List Run 55

6 Data Logger 58

6.1 Using the Data Logger Function 58

6.2 Parameters 59

6.2.1 Sampling Interval 59

6.2.2 File Path 59

6.2.3 T. Stamp Filename 59

6.2.4 Log Data 60

6.2.5 Status Code 61

6.2.6 Trigger Source 61

6.2.7 Datalog Start/Stop 62

7 Utilities Menu 63

7.1 User Settings 63

7.1.1 Key Lock Output 63

7.1.2 Beep Sound 63

7.1.3 Date 64

7.1.4 Time 64

7.1.5 Screen Intensity 64

7.1.6 Language 64

7.2 Remote Interface 65

7.2.1 USB Settings 66

7.2.2 LAN 67

7.3 GPIB (optional) 73

7.4 Digital I/O 74

7.4.1 Functions 75

7.4.1 Polarity 76

7.4.1 Inhibit Mode 76

7.5 Test/Admin 77

7.5.1 Self Test 77

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7.5.2 Security 77

7.6 Error Log 79

7.7 Help 81

7.8 On Screen Help 82

8 Key Lock 83

9 Save/Recall 84

9.1 Save the Output Settings 84

9.2 Recall the Instrument’s Settings 85

9.3 Power-On Settings 86

9.4 Screenshot 87

10 Calibration Adjustment Procedure 89

10.1 Voltage Calibration Adjustment 90

10.2 Current Calibration Adjustment 91

10.3 OVP Calibration Adjustment 92

10.4 OCP Calibration Adjustment 93

10.5 RTC Calibration Adjustment 94

11 Performance Verication 95

12 Specications 98

13 Service Information 99

14 LIMITED THREE-YEAR WARRANTY 100

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Introduction

1.1 Product Overview

9140: 32 V / 8 A / 300 W 9141: 60 V / 4 A / 300 W

Figure 1.1 Front View

The 9140 Series triple output multi-range DC power supplies combine industry-leading power density
and performance with an extensive set of features in a compact 2U form factor.

Three isolated output channels each produce 100 W of clean power with exceptionally low ripple and
noise characteristics. Combine channels to output up to 300 W, distributing the power across all three
channels. Multiple outputs paired with advanced list mode programming, data logging, and protection
features make these power supplies suitable for a wide range of benchtop or test system applications.

Model 9140 9141

Voltage per Channel 0 to 32 V 0 to 60 V

Current per Channel 0 to 8 A 0 to 4 A

Maximum Power per Channel 100 W

Maximum Combined Power 300 W

Table 1.1 Models

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Introduction 12

1.2 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 9140 or 9141 Power Supply

• 1 x AC Power Cord

• 1 x Certicate of Calibration

• 1 x Test Report

Note:

Ensure the presence of all the items above. Contact

the distributor or B&K Precision if anything is missing.

1.3 Features

• Three independent galvanically isolated, oating output channels providing up to 100 W per channel
or 300 W total when combining all three channels

• High power density, compact 2U half-rack form factor

• Multi-ranging operation delivers rated power at various voltage/current combinations

• Combine outputs in parallel or series to increase current or voltage (up to 24 A or 180 V depending
on the model)

• Advanced list mode programming with internal storage for up to 10 list mode programs and list
sequencing capabilities

• Digital I/O block oers external triggering, voltage fault and remote inhibit capabilities

• Overvoltage (OVP), overcurrent (OCP), overtemperature (OTP), and includes a key-lock function

• NISPOM-compliant sanitization procedure to securely erase and return the instrument to factory
settings

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Introduction 13

• USB (USBTMC-compliant) and LXI compliant LAN interfaces standard, GPIB optional

• LabVIEW

𝑇 𝑀

, IVI-C, and IVI.NET drivers provided

1.4 Dimensions

The 9140 power supply’s dimensions are approximately:
213 mm (8.4 in) x 88.2 mm (3.47 in) x 330 mm (13 in) (W x H x D).

Figure 1.2 Dimensions

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Introduction 14

1.5 Rackmount Installation

The 9140 Series is compatible with the optional 19-inch rackmount kit model RK2US. The RK2US
installation instructions can be downloaded from bkprecision.com

Figure 1.3 Dimensions

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1.6 Front Panel

Introduction 15

Figure 1.4 Front Panel

Item Name Description

1 Power Button Power the instrument ON or OFF

2 Function Keys See section ?? for details.

3 USB Host Port USB port used to connect ash drives.

4 Display Visual presentation of the device function and measurements.

5 Numeric Keypad Used to enter precise values.

6 Rotary Knob Used to navigate menues or congure parameters.

7 Output

8 Soft Keys Used to invoke any functions displayed above them.

Isolated and oating output channel supporting sheathed banana
plugs and spade lug type connectors

Table 1.2 Front Panel

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1.7 Display

Icon Description

Introduction 16

The output is disabled.

The output is enabled and in constant voltage mode

The output is enabled and in constant current mode

Data loggin is enabled but not recording.

Data logging is enabled and recording.

The instrument is connected to a network.

An issue occured when attempting to connect to a network.

The instrument is not connected to a network.

All keys excluding softkey F6 are locked.

Over voltage protection was triggered.

Over current protection was triggered.

Over temperature protection was triggered.

The instrument is set to remote mode

Remote sense is enabled.

Remote

Table 1.3 Display Icons

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1.8 Rear Panel

Introduction 17

Figure 1.5 Rear Panel

Item Name Description

1 Output/Sense

2

3

4 Digital I/O Send or receive a signal to or from an external device.

5 USB interface Connect a USB type B to type A to remotely control the unit.

6 LAN interface

7 Chassis ground

8

Kensington

security slot

GPIB Interface

(Optional)

AC power input

& fuse box

Rear panel output with remote sense. Internal relays switch between
local and remote sensing.

Lock the instrument to a xed location using the security lock via the
lock hole. Lock is not included.

Connect a GPIB cable to remotely control the unit `

Connect a Cat 5/6 Ethernet straight-through patch cable to remotely
control the unit.

Provides a zero potential voltage reference and a dissipation point for
interference, transient voltages and static.

Houses the fuse as well as the AC input.

Table 1.4 Rear Panel

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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 universal AC input that accepts line voltage input within:

9140 9141

AC Line Input 100 - 240 VAC±10%, 47 to 63 Hz

AC Line Phase Single Phase

Maximum Rated

Input Power

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 sucient circuit capacity for the power supply. Once veried, connect
the cable rmly.

The included AC power cord is safety certied 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.

500 VA

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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Getting Started 19

2.2 Fuse Requirements

An AC input fuse is necessary when powering the instrument. The below table shows the fuse required
for all models.

Model Fuse Specication

9140 3.15 AT, 250 V

9141 3.15 AT, 250 V

2.3 Check or Replace Fuse

For safety, no power should be applied to the instrument while changing line voltage

operation. Disconnect all cables connected to the instrument before proceeding.

– Locate the fuse box next to the AC input connector in the rear panel. (See gure 1.5)

– Insert a small athead screwdriver into the fuse box slit to pull and slide out the fuse box as indicated

below.

– Check and replace fuse if necessary. (See gure 2.1)

Figure 2.1 Fuse Removal

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Getting Started 20

Any disassembling of the case or changing the fuse not performed by an

authorized service technician will void the warranty of the instrument

SHOCK HAZARD:

Hazardous voltages may exist at the outputs and the load connections when using a power supply

with a rated output greater than 60 V. 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.

The rear output terminals can accept wire sizes AWG 24 to AWG 12 (See Table 2.1).However, we
recommend using 12 AWG if current output is between 5 to 10 A. Refer to Table 2 below to determine
the proper wire size.

Wire Gauge Rating
AWG 10 12 14 16 18 20 22 24 26 28
Imax (A) 40 25 20 13 10 7 5 3.5 2.5 1.7
mΩ/meter 3.3 5.2 8.3 13.2 21 33.5 52.8 84.3 133.9 212.9

Table 2.1 Wire Gauge Rating

Output Isolation

The output terminals of the 9240 Series are isolated from earth ground. An earth ground terminal is
provided on the front panel for convenience. Any output terminal may be grounded. However, output
terminals must not exceed ±200 VDC.

SHOCK HAZARD:

Floating voltage must not exceed 200 VDC.

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2.4 Preliminary Check

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

Getting Started 21

Verify AC

Input Voltage

Connect Power

& Self-Test

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

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

Connect AC power cord to the AC receptacle in the rear panel and press the
power button. It will run through a self-test procedure initially before booting to
the main screen.

Figure 2.2 Initializing

After the system scan is complete the LCD will display as shown in Figure 2.3

Note:

The initial power on state is based on the settings set on Power-ON

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2.5 Self test Errors

Getting Started 22

Figure 2.3 Home Display

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

Error Message Description

EEPROM Fail The internal EEPROM is corrupted or damaged.

System Lost Last system settings within the EEPROM are lost.

Module 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.

Table 2.2 Error Message

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

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Basic 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.

3.1 Keys

3.1.1 Main Keys

There are three main keys:

Navigates the 5 available screens.
When navigating any menu
returns the key will return "Home"
main display

5 available displays:

– Main page:

Overview of the 3 outputs.

– Single Channel Display 1 to

3: Detailed channel overview.

– Live Output Monitoring:

Oscilloscope like overview
of the measured output
parameters.

More information on each display in 3.2.

Opens up a menu giving access
to various save and load options,
regardless of the current display
of the screen.

Opens the main menu bar. If
a menu bar is already open,

pressing will navigate to
the main menu bar.

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Basic Front Panel Operation 24

3.1.2 Soft Keys

The unit has six soft keys, which are located beneath the screen. Each key selects the corresponding
function. Functions will vary depending on the current menu or display.

Figure 3.1 Soft Keys

3.1.3 Numeric Keys

The numeric keys allow the conguration of various parameters. Using the numeric keys provides a fast

and precise input. The key can be found with the numeric keys. Pressing enter will assign the
selected value to the desired parameter.

Figure 3.2 Numeric Keys

3.1.4 Output Control

The button toggles the output On/O. When output is enabled, the ON button will turn green
and the supply will display the state of the channel.

represents constant current mode. represents constant voltage mode. This is indicated for

each channel independently. When output is disabled, the channel state will display .

The key toggles all the channels On/O simultaneously. Its function may vary depending on the
coupling state of the channels. For more information go to Coupling.

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Basic Front Panel Operation 25

3.2 Display

These power supplies have three main display modes: three channel display, single channel display, and

live output monitoring display. Press the button to cycle between the dierent display modes or to
return home when viewing any other menu.

Three Channel Display

Provides information of the outputs’:

• State

• Run time

• Voltage

• Current

• Power

Allows conguration of:

• Vset

• Iset

Figure 3.3 Three Channel Display

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Single Channel Display

Basic Front Panel Operation 26

Provides information of the outputs’:

• State

• Run time

• Voltage

• Current

• Power

• Vmax/Vmin

• OVP/OCP

• OnDelay/ODelay

Allows conguration of:

• Vset

• Iset

• Vmax/Vmin

• OVP/OCP

• OnDelay/ODelay

Figure 3.4 Single Channel Display

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Basic Front Panel Operation 27

Live Output Monitoring

The live output monitoring display shows metered output voltage and current over time.
It is always active and will continuously plot and overwrite the oldest value when the display graph is full.

Figure 3.5 Live Output Monitoring Display

The Live output display can be congured by setting the: Voltage, Current, and Time Scale.

Voltage Scale

The voltage scale of each output can be set from 10 mV/Div up to 20 V/Div.

1. While in Live Output Display use the softkeys to select Voltage Scale.

2. Select a channel to congure.

3. Use the rotary knob to navigate through the available scales.

Current Scale

The current scale of each output can be set from 10 mA/Div up to 3 A/Div.

1. While in Live Output Display use the softkeys to select Current Scale.

2. Select a channel to congure.

3. Use the rotary knob to navigate through the available scales.

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Basic Front Panel Operation 28

Time Scale

The time scale of each output can be set from 1 s/Div up to 10 min/Div.

1. While in Live Output Display use the softkeys to select Time Scale.

2. Use the rotary knob to navigate through the available scales.

Voltage Oset

A voltage oset can be added to each output. The oset can be set from 0 V up to 60.6 V on the 9141
and 0 V up to 32.2 V on the 9140.

1. While in Live Output Display use the softkeys to select Voltage Oset.

2. Select a channel to congure.

3. Use the rotary knob to navigate through the available scales.

Current Oset

A current oset can be added to each output. The oset can be set from 0 A up to 4.4 A on the 9141
and 0 A up to 8.8 A on the 9140.

1. While in Live Output Display use the softkeys to select Current Oset.

2. Select a channel to congure.

3. Use the rotary knob to navigate through the available scales.

3.3 Check Model and Firmware Version

The rmware version, model, and serial number can be veried by entering the security settings. Press

button then use the soft keys to select Utilities > Help > System Info to view model and rmware

information.

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Basic Front Panel Operation 29

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 or the rotary knob.

1. Using the keypad: Use the soft keys to select the channel VSET or ISET settings beneath channel
view on the display. Then use the numeric keypad to input the voltage or current value then press

to conrm.

2. Using the rotary knob: Use the soft keys to select the channel VSET or ISET settings beneath
the channel view on display. Then turn the knob clockwise to increment or counter-clockwise to
decrement the value.

a. Use the below the rotary knob to move the cursor. Press the knob in to conrm.

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Output Conguration

4.1 Protection Settings

4.1.1 Over Voltage Protection (OVP)

Over voltage protection is always enabled, however the user can set the OVP voltage limits.

1. Press the button then use the soft keys to select Output cong > Protection settings

2. Use the soft keys to select a channel to adjust.

3. Select OVP Limit.

4. Use the numeric keypad or rotary knob to set the desired OVP limit.

When OVP protection is tripped during operation, the output will be de-rated to 0 V and the icon
will appear between the wattage and Vset.

4.1.2 Over Current Protection (OCP)

Over current protection state and limit can be set in the protection settings.

1. Press the button then use the soft keys to select Output cong > Protection settings

2. Use the soft keys to select a channel to adjust.

3. Press OCP State to toggle the over current protection on or o.

4. Select OCP Limit and use the numeric keypad or rotary knob to set limit value.

When OCP protection is tripped during operation, the output will be de-rated to 0 V and the icon
will appear between the wattage and Vset.

4.1.3 Over Temperature Protection & Over Temperature Warning (OTP & OTW)

The state and limit of both OTP & OTW cannot be set or congured in the protection settings. OTP is set
to 85 °C and OTW is set to 75 °C. If the temperature reaches either OTW, the OT icon will blink on the
display with a low period beep sound. If temperature reaches OTP the OT icon will show on the display
and the output will turn o. The output will not be allowed to turn on until the temperature drops to 75 °C.

Fan Speed Control

2 A 0%

2 to 5 A 25%

5 A 100%

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Output Conguration 31

4.1.4 Vmax/Vmin

Congure the maximum or minimum voltage value the user can set from the protection
settings.

1. Press the button then use the soft keys to select Output cong >

Protection settings

2. Use the soft keys to select a channel to adjust.

3. Select Vmax or Vmin and set a maximum or minimum value using the numeric keypad or rotary knob.

4.1.5 Protection Clear

Protections are cleared from the output conguration settings as shown in the following steps.

1. Press the button then use the soft key to select Output cong >

Protection Clear.

2. Press the soft key to clear the protection for the corresponding channel, or select

All CH Clear to clear protections on all three channels.

4.2 Output Settings

4.2.1 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. When remote
sense is enabled, the positive (+S) and positive lead (+) of the DC output are connected to the positive
(+) of the load. Similarly, the negative sense (-S) and negative lead (-) of the DC output are connected
to the negative (-) end of the load shown in gure 4.1

Figure 4.1 Remote Sense

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Output Conguration 32

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.

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.

Remote sense is disabled by default, see the following steps to enable remote sense:

1. Press the button then use the soft key to select Output cong > Output Settings.

2. Select a desired channel to congure.

3. Press Remote Sense using the soft key to enable remote sense.

4.2.2 Output Timer

Output timer can be set for each channel individually. When the output timer is enabled, an hourglass
icon will be displayed next to the channel number. The timer countdown will begin when the channel
output is enabled. The output is disabled when the countdown reaches 0. The timer can be set from 1
second to 99 hours 59 minutes and 59 seconds.
Follow the steps below to enable and set the output timer:

1. Press the button then use the soft key to select Output cong > Output Settings.

2. Select a desired channel to congure. Push Timer State to enable the timer.

3. Select Timer Setting and set a desired time for the output to be enabled using the numeric keypad or
rotary knob. The timer format is: HH:MM:SS. Use the keys to move the cursor.

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Output Conguration 33

4.2.3 Voltage Slew

The rising voltage slew rate can be set in volts per second. The voltage slew range can be set from

0.001 V/s to 3200.0 V/s.

1. Press the button then use the soft key to select Output cong > Output Settings.

2. Select a desired channel to congure.

3. Select Voltage Slew and use the numeric keypad or rotary knob to adjust the slew rate value. Press
to conrm input.

4.2.4 Current Slew

The rising current slew rate can be set in amps per second. The current slew range can be set from
1 A/s to 800 A/s.

1. Press the button then use the soft key to select Output cong > Output Settings.

2. Select a desired channel to congure.

3. Select Next Pg. > Current Slew and use the numeric keypad or rotary knob to adjust the slew rate

value. Press to conrm input.

4.2.5 On/O Delay

A channel on or o delay in seconds can be applied to any channel. These delays can be set from

0.001 s to 3600.0 s.

1. Press the button then use the soft key to select Output cong > Output Settings.

2. Select a desired channel to congure.

3. Select Next Pg. > On Delay to set an on delay or O Delay to set an o delay.

4. Use the numeric keypad or rotary knob to adjust the delay value. Press to conrm input.

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Output Conguration 34

4.3 Operating Mode and Coupling

Set the operation mode or coupling.

Press the button then use the soft key to select Output Cong > Op. Mode/Coupling > Operation

Mode.

4.3.1 Normal Mode

Sets operation mode to Normal.

Normal mode sets the instrument to operate as a true triple output power supply.

Press the button then use the soft key to select Output Cong > Op. Mode/Coupling >
Operation Mode > Normal.

9140 9141

Individual CH Individual CH

32 V 8 A 60 V 4 A

Figure 4.2 Normal Mode

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In Normal mode the main page will display the three outputs.

Toggles through CH1, CH2, CH3, and live output monitoring display.

Output Conguration 35

Figure 4.3 Normal Mode Main Page

Single CH displays more information about the output, and allows conguration of more parameters.

Figure 4.4 Single Channel

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Output Conguration 36

4.3.2 Series Mode

Set operation mode to Series.

Series mode changes the UI to accurately represent the possible outputs congurations.

Series mode does not internally wire the outputs. The outputs must be connected externally to increase

the available voltage range.

Press the button then use the soft key to select Output Cong > Op. Mode/Coupling > Operation

Mode > Series.

The image below illustrates the external wiring required to connect all channels in series. If CH1+ CH2
is chosen CH2’s positive terminal does not connect to CH3’s negative terminal.

Series CH1+2 Series All

9140 9141

CH1 + CH2 All CHs CH1 + CH2 All CHs

64 V 96 V 120 V 180 V

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Output Conguration 37

CH1 + CH2

Operation mode will be set to Series 1 + 2. Changing operation mode will undo previous coupling
conguration.

Press the button then use the soft key to select Output Cong > Op. Mode/Coupling > Operation

Mode > Series > CH1 + CH2.

Figure 4.5 Series 1+2

In Series CH1 + 2 the main page will display the output of the combined outputs, as well as the output

of the individual CH3. The button will toggle through single channel display for Series CH1 + 2,
CH 3, and live output monitoring.

Figure 4.6 Series CH1+2 Main Page

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Output Conguration 38

Single CH displays more information about the output, and allows conguration of more parameters.
The voltage congurations will now range from 0 v to 64 V for model 9140 and 0 V to 120 V for model

9141.

Figure 4.7 Series CH1+2 Single Channel Display

Protection Setting menu will also adjust the congurable values.

Figure 4.8 Series CH1+2 Protection Settings

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Output Conguration 39

Series All

Operation mode will be set to Series All. Coupling will not be available in Series All mode.

Press the button then use the soft key to select Output Cong > Op. Mode/Coupling > Operation

Mode > Series > Series All.

Figure 4.9 Series All

In Series All mode will only toggle between the Series All display and live output monitoring.
Series All CH display will adjust to voltage conguration between 0 V and 96 V for model 9140 and 0 V

to 180 V for model 9141.

Figure 4.10 Series All Main Page

Protection Setting menu will also adjust the congurable values.

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Output Conguration 40

Parallel Mode

Set operation mode to Parallel.

Parallel Mode does not internally wire the outputs. The outputs must be connected externally to increase

the available current range.

Parallel Mode changes the UI to accurately represent the possible output congurations.

Press the button then use the soft key to select Output Cong > Op. Mode/Coupling > Operation

Mode > Parallel.

The image below illustrates the external wiring required to connect all channels in Parallel. If CH1+ CH2
is chosen CH2’s terminals do not connect to CH3’s terminals.

Parallel CH1+2

Parallel All

9140 9141

CH1 + CH2 All CHs CH1 + CH2 All CHs

16 A 24 A 8 A 12 A

Table 4.1 Parallel Mode

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Output Conguration 41

CH1 + CH2

Operation mode will be set to Parallel 1 + 2. Selecting an operation mode will undo previous coupling
conguration.

Press the button then use the soft key to select Output Cong > Op. Mode/Coupling > Operation

Mode > Parallel > CH1 + CH2.

Figure 4.11 Parallel CH 1+2

In Parallel CH1 + 2 Mode the main page will display the output of the combined outputs, as well as the

output of the individual CH3. The button will toggle through single channel display for Parallel CH1
+ 2, CH 3, and live output monitoring.

Figure 4.12 Parallel CH 1+2 Main Display 9141

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Output Conguration 42

The Single CH display will adjust to allow current conguration between .030 A to 16 A for model 9140
and .030 A to 8 A for model 9141.

Figure 4.13 Parallel CH 1+2 Single Channel Display

Protection Setting menu will also adjust the congurable range of each parameter.

Figure 4.14 Parallel CH 1+2 Protection Settings

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Output Conguration 43

Parallel All

Operation mode will be updated based on selected mode. Coupling is not available.

Figure 4.15 Parallel All Operation Mode

In Parallel All Mode the button will only toggle between the Parallel All display and live output
monitoring.

Parallel All CH display will adjust to allow value conguration of .045 to 24 A for model 9140 and .045 A
to 12 A for model 9141.

Figure 4.16 Parallel All Main Page

Protection Setting menu will also adjust the congurable values.

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Tracking

Output Conguration 44

Figure 4.17 Parallel All Main Page

Voltage levels are tracked on either CH1+2 or All Channels.

Press the button then use the soft key to select Output Cong > Op. Mode/Coupling >

Operation Mode > Tracking.

Tracking mode allows real time voltage tracking across all channels or between CH1 and CH2.

When tracking mode is enabled, list mode will still operate independently on the channel that has list
enabled. Tracking channels will not track the list changes.

Figure 4.18 Tracking Mode

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Output Conguration 45

Coupling

Enable or disable the output coupling between multiple output channels, by using the soft keys to toggle
individual channel coupling On or O.

Press the button then use the soft key to select Output Cong > Op. Mode/Coupling

If coupling is enabled, will follow the coupling settings. Channel output On/O buttons will also
follow the coupling settings if the correlated channel is coupled to another channel.

Example:

If CH1 and CH2 are coupled and the coupled CHs are on, will not turn on
CH3. It will turn o CH1 and CH2.

However, if all channels are OFF will turn all CHs ON.

If all CHs are ON will turn all CHs OFF.

Figure 4.19 Parallel All Main Page

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Output Sequencing

Output Conguration 46

Figure 4.20 Sequencing

Combine CH Coupling with Output On and O Delay to toggle the outputs in a set sequence.

To congure a sequence:

1. Set voltage and current output of the participating channels.
Reference section Setting Voltage and Current.

2. Synchronize output state by coupling of all participating channels.
Reference section Coupling

3. Congure the turn on order of the outputs using the On and O Delay.
Reference section Output Timer

Begin the sequence by turning on any of the participating outputs.

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List Mode

The 9140 and 9141 are capable of storing up to 10 programmable lists in the internal memory. Each list
can have up to 100 congurable steps.

List memory is shareable across all 3 channels, allowing the channels to run the same list or dierent list
simultaneously.

If all ten list numbers are taken, a list can also be saved to a USB. Lists can be loaded from a USB,
allowing for a larger collection of programmed lists.

5.1 List Setup

Press the button then use the soft key to select List Setup.

Use the softkeys to select one of the channels CH1, CH2, or CH3.

Figure 5.1 List Setup

Use the softkeys to set the following parameters.

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List State:

Toggle list state On/O for the selected channel.

List Number:

Select a list program from the memory to run on the channel.
Use the numeric keypad or rotary knob to select list number.

Press to assign the list to a channel.

Pace:

Set the pace in which steps are executed.

a. Dwell: The next step outputs once the dwell time elapsed.

List Mode 48

b. Trigger: After the dwell time elapsed, wait for a trigger before outputting the next step.

Trigger Source

Set the trigger source.

a. Manual: Select to use a manual trigger. The Trigger softkeywill be availableonce List State is on and

exit out of the menu to the main display.Press it to manually trigger the list program. If the step dwell
time has not elapsed, then Trigger will not have a white background. When dwell timeelapses, Trigger background
color will turn white to indicate the trigger is ready.

Figure 5.2 Waiting for Trigger

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List Mode 49

b. Digital IO: Select to use the digital I/O pins to receive a trigger. To assign trigger input function to a

pin see 7.4.1.

c. Remote: Select to receive a trigger from the remote interface.

After List

Sets the voltage and current settings at the end of the list program.

a. DC: Returns to the last DC output voltage and current setting prior to enabling list mode.

b. Last: Retains the last step voltage and current setting after the list program ends.

Note:

If the list is aborted, the output will return to the last set voltage and current

output values before the list began, even if After List is set to Last.

5.2 Edit List

Press the button then use the soft key to select List Setup > Edit List.

Use the softkeys to set the following parameters.

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List Mode 50

5.2.1 Load/Save List

Save to USB

Save the selected list program to a USB.

Use the rotary knob to navigate through the le paths of the USB. Use the button to expand folders.
Once the desired location has been found select Save by pressing the softkey furthest to the left.

Figure 5.3 Save to USB

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List Mode 51

Load from USB

Load a previously saved list from a USB to selected List Number.

Use the rotary knob to navigate through the le paths of the USB. Use the button to expand folders.
Once the desired location has been found select Load by pressing the softkey furthest to the left.

Figure 5.4 Load from USB

Note:

The list must be saved/overwritten at the selected list number location before it is able to be assigned.

5.2.1 List Number

1. Select a list program from the internal memory.

2. Use the numeric keypad or rotary knob to select a list (0 to 9).

3. Press

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List Mode 52

5.2.2 Next

Set the next list program to run after the current list elapse.

a. To make a list run continuously and indenitely, set Next to the same number as List Number.

b. To run dierent list sequences continuously, set Next to each other.

Example Set Next on List 1 to 2.

Set Next on List 2 to 1.

5.2.3 Repeat

To repeat a list, set Repeat using the numeric keypad or rotary knob and press .

5.2.4 Steps

Add, delete, clear all, or edit steps.

Add Step

Use the softkeys to add a step to the list. The step added will be a duplication of the step selected before
pressing Add Step.

To select a step to duplicate, use the rotary knob to navigate the available steps. If the list is new, only
one default step will be available. Pressing Add Step will duplicate the default step.

Figure 5.5 Default Step In New List

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Delete Step

Delete the step selected before pressing Delete Step.
Use the rotary knob to navigate between each step.

Clear All

Clear all list parameters. See g 5.5

Edit Step

Use the rotary knob to navigate the steps available.(select a row)

To edit parameters of the step, use the keys.(selects a column)

See gure 5.6 for the parameter each row edits.

List Mode 53

Press to toggle enable/disable BOST and/or EOST.

Figure 5.6 List Conguration

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Voltage Sets Vset value.

When setting Vset the list will not limit the voltage range based on mode.
Therefore, Vmax will be 96.960 for model 9140 and 180.800 for model 9141.
To prevent a protection trip, verify the Vset and Iset values in the list is within
the range of the congured operation mode before running the list.

Current Sets Iset value.

When setting Iset the list will not limit the current range based on mode.
Therefore, Imax will be 24.240 for model 9140 and 12.120 for the 9141.
To prevent a protection trip, verify the Vset and Iset values in the list is within
the range of the congured operation mode before running the list.

List Mode 54

Step Parameters

BOST Press the knob or to enable/disable a trigger-out signal at the beginning of the step (BOST).

EOST Press the knob or to enable/disable a trigger-out signal at the beginning of the step (EOST).

Dwell Sets the dwell time of the selected step.

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List Mode 55

5.3 List Run

List allows a sequence of outputs with up to 100 congurable steps. With sharable memory across all
three channels, a list can run simultaneously on various channels. This allows for a list to be compatible
in normal, parallel or series mode.

Before running a list its parameters must be congured.

1. Congure the parameters of each step. See 5.2

2. Set the settings of the channel which will output the list. See 5.1

a. Enable List State on desired channel.

b. Assign a List Number to the channel.

c. Select Pace {Dwell or Trigger}.

d. Select Trigger Source {Manual, Digital IO, or Remote }.

e. Select After List output {DC or Last}.

3. After conguring the list and channel parameters press to return to the main page.

– Vset will be replaced with List Start if List State was enabled.

Figure 5.7 List State Disabled

4. Select List start to start the list.

– Once the list begins List Start will change to Abort List

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List Mode 56

Figure 5.8 List State Enabled CH 1

– The interaction with the list will vary depending on the chosen Pace. See 5.1

5. Select List Abort to end the list before all steps elapse. If the all steps elapse the list will end and the
output will be set to chosen After List parameter.

– If After List is set to DC the output will output the Vset and Iset values.

– If After List is set to Last the output will output the values of the last step in the list.

Note:

While the list is running the user can adjust the current step output by setting Vset or Iset on the main
display. Doing so will immediately change the value of the ongoing output. However, the set value will
not be saved to the list. Once the dwell time of the step has elapsed the list will continue and output
the next step.

If Trigger source is set to manual, Vset/Iset will not be available. The rotary knob and numeric keypad
can be used to adjust the selected value. To adjust both Vset/Iset navigate to the single CH display of

the output using the key.Vset/Iset will be available as shown in gure 5.9.

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Figure 5.9 Single Channel Display Vset/Iset

List Mode 57

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Data Logger

The data logger can record the output voltage, current, and error codes of all three channels. Log data
can be congured to record either Voltage only, Current only, or both.

Connect a USB ash drive to the front panel USB port. Max. Recording time will vary based on the ash
drive size and the amount of the data being logged.

Figure 6.1 Data Logger Max Time

6.1 Using the Data Logger Function

Press the button then use the soft key to select Data logger. The Data Logger settings can be
selected in this menu.
Before starting the Data Logger its settings must be adjusted.

1. Set the desired Sampling Interval See 6.2.1

2. Select a File Path to determine where to store the collected data. see 6.2.2

3. Enable or disable T. Stamp Filename. See 6.2.3

4. Choose what data to record. See 6.2.4

5. Enable or disable Status Code. See 6.2.5

6. Select a Trigger Source. See 6.2.6

7. After setting all desired parameters press datalog Start/Stop to begin recording. Staring data log
will vary based on chosen trigger. See6.2.7

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Data Logger 59

6.2 Parameters

6.2.1 Sampling Interval

Press the button then use the soft key to select Data logger > Sampling Interval.

Use the numeric keypad or rotary motor to select the sampling interval. Press to assign the selected
value. (.2s to 300s)

6.2.2 File Path

Press the button then use the soft key to select Data logger > File Path.

Using the rotary knob and navigate through the le path of the USB. Once the desired location
has been found select save by pressing the softkey furthest to the left.

Verify that the correct path was chosen in the Data Logger menu.

Figure 6.2 File Path Selected

6.2.3 T. Stamp Filename

Press the button then use the soft key to select Data logger > T. Stamp Filename
Toggle to enable/disable time and date on the le name.

Example Enabled 9140_log_20201017002307

Disabled 9140_log

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Data Logger 60

6.2.4 Log Data

Press the button then use the soft key to select Data logger > Next Pg. > Log Data.

Select data to be logged.

– All: Record both voltage and current output of all channels.

– Voltage: Record the voltage output of all channels.

– Current: Record the current output of all channels.

Figure 6.3 Log Data All

The data is recorded in the following order:

CH1 Voltage CH1 Current CH2 Voltage CH2 Current CH3 Voltage CH3 Current Status Code

Table 6.1 Data Order

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Note:

Data order will vary depending on Log Data selected.

6.2.5 Status Code

Press the button then use the soft key to select Data logger > Status Code.
Toggle to enable/disable status code.

Enabled Status Code will record all codes reported. See 6.3 for an example.
In gure 6.3 the code 0x0001 is returned. This indicates OVP has been triggered.

Data Logger 61

Table 6.2 denes each code.

Code Description

0x0001 Over Voltage Protection Triggered

0x0002 Over Current Protection Triggered

0x0004

0x0008 Sense not connected

Table 6.2 Status Code

Over Temperature

Protection Triggered

6.2.6 Trigger Source

Press the button then use the soft key to select Data logger > Trigger Source.

Datalog can be triggered in three ways: Manual, Digital IO, and Remote.

• Manual: Select to use manual trigger. The trigger softkey will be available as Datalog Start/Stop.
See section 6.2.7

• Digital IO: Select to use the digital I/O pins to receive a trigger. To assign a function to a pin see
section7.4.1.

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Data Logger 62

• Remote: Select to receive a trigger from a remote interface.

Note:

For Digital IO and Remote the rst trigger will turn Data log on. A second trigger will begin data

recording. will be displayed on the top right when data is being logged. See 6.2.7

6.2.7 Datalog Start/Stop

Press the button then use the soft key to select Data logger > Datalog Start/Stop. Toggle to turn
datalog On/O.

will be displayed on the top right when data logger is on but not recording.

The command INIT:IMM:DLOG will turn on data logger.
For Digital IO press Datalog Start/Stop to turn data logger on.

will be displayed on the top right when data logger is recording.

The command TRIG:DLOG:IMM will begin the recording.
For Digital IO an input high signal to the set pin will turn data logger on.

If Trigger Source is set to manual pressing Datalog Start/Stop will start/stop recording without a second
signal.

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Utilities Menu

Congure the settings in the following menus:

• User Settings

• Remote Interface

• I/O Conguration

• Test/Admin

• Error Log

• Help

7.1 User Settings

Press the button then use the soft key to select Utilities > User Settings.
The system’s settings can be congured here.

7.1.1 Key Lock Output

Press the button then use the soft key to select Utilities > User Settings > Key Lock Output.

Toggle to enable/disable the key lock.

– Enabling Key Lock Output changes the function of Key Lock.

– For more information see chapter 8

– Default: OFF

7.1.2 Beep Sound

Press the button then use the soft key to select Utilities > User Settings >Beep Sound.

Toggle to enable/disable the beeper sound.

Default: ON

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Utilities Menu 64

7.1.3 Date

Press the button then use the soft key to select Utilities > User Settings >Date.

Use the number pad to set the date.

YY/MM/DD

7.1.4 Time

Press the button then use the soft key to select Utilities > User Settings >Time.

Use the number pad to set the time.

HH:MM:SS

7.1.5 Screen Intensity

Press the button then use the soft key to select Utilities > User Settings >Next Pg. > Screen
Intensity.

Use the rotary knob or number pad to set the screen brightness.

Lowest 1

Highest 10

7.1.6 Language

Press the button then use the soft key to select Utilities > User Settings >Next Pg. > Language.
Set the language for the On Screen Help guide. It does not change the language for the menus. For
more information about On Screen Help see section 7.8

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Utilities Menu 65

7.2 Remote Interface

The 9140 series supports remote communication on up to three interfaces: USB, LAN, and GPIB (optional).

While in remote mode the screen displays “RMT” in the upper right corner. Switching to remote mode
does not impact the supply’s output parameters.

In remote mode, front panel operation is disabled. Only the Local button is enabled. Revert to manual

mode by pressing the key or by sending the command SYST:LOC.

The webserver remote interface requires the password BK to login.

Select and congure the following interfaces:

• USB

• LAN

• GPIB

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Utilities Menu 66

7.2.1 USB Settings

Press the button then use the soft key to select Utilities > I/O Cong > USB Settings.
The USB device port is located in the rear-panel. See 1.8

The 9140 series are both USBTMC and USB VCP compliant.

In the USB Settings menu use the soft keys to select either:

– USBVCP

– USBTMC

Default: USBVCP

Figure 7.1 USB Details

The VISA Resource string gives USB0::<Vendor ID>::<Product ID>::<Serial Number>:INSTR

Example From gure 7.1 :

<Vendor ID> = 0x3121
<Product ID> = 0x0001 for 9140 or 0x0002 for 9141
<Serial Number> = 583k20101

When using USBVCP set the port setting to:

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7.2.2 LAN

To congure the LAN Settings

Utilities Menu 67

Figure 7.2 USB Port Settings

Press the button then use the soft key to select Utilities > I/O Cong > LAN Settings.
The following settings are available in LAN Settings:

• IP Mode

• IP Address

• Subnet

Mask

• Gateway IP

• Primary

DNS

• Hostname

• LAN Reset

• Restore

Default

• LAN Status
Figure 7.3 LAN Settings

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Utilities Menu 68

Note:

To access the webserver remote interface enter the default password bk.

IP Mode

Select Dynamic Host Conguration Protocol (DHCP) or Manual to set how the LAN settings will be
congured.

Press the button then use the soft key to select Utilities > I/O Cong > LAN Settings > IP MODE.

The easiest way to congure the LAN settings is to set the IP Mode to DHCP.DHCP will automatically
assign an IP address to the instrument.

The settings can manually be congured by selecting Manual.

IP Address

The IP Address is a unique string of numbers separated by periods. To enter an IP address:

Press the button then use the soft key to select Utilities > I/O Cong > LAN Settings > IP
Address.

Use the numeric keypad to enter an IP address. Then keys are used to separate each number in

the string. After inputting each number press to set the address.

Subnet Mask

Subnet Mask divides the IP address into network address and host address.

To set Subnet Mask:

Press the button then use the soft key to select Utilities > I/O Cong > LAN Settings > Subnet
Mask.

Use the numeric keypad to enter the subnet mask. Then keys are used to separate each number

in the string. After inputting each number press to set the address.

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Utilities Menu 69

Gateway IP

The gateway address is by default the IP address of the network device that connects the instrument.
If IP Mode is set to DHCP Gateway IP does not have to be set.
To set Gateway IP :

Press the button then use the soft key to select Utilities > I/O Cong > LAN Settings > Gateway
IP.

Use the numeric keypad to enter an IP address. Then keys are used to separate each number in

the string. After inputting each number press to set the address.

Primary DNS

Domain Name Service (DNS) is the system that automatically translates Internet addresses to the numeric
machine addresses. The DNS address is the IP address of the system that performs this service.

If IP Mode is set to DHCP DNS will automatically be set.
To set the Primary DNS :

Press the button then use the soft key to select Utilities > I/O Cong > LAN Settings > Primary
DNS .

Use the numeric keypad to enter an IP address. Then keys are used to separate each number in

the string. After inputting each number press to set the address.

Hostname

Each instrument comes with a unique hostname that can be changed. The default hostname has the
following format:

BK-<modelnumber>-<Serialnumber>

Figure 7.3 shows the example:

BK-9141-20101

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Utilities Menu 70

LAN Reset

LAN Reset resets all LAN settings and webpage passwords. The default webpage password is bk.

To reset LAN :

Press the button then use the soft key to select Utilities > I/O Cong > LAN Settings > LAN
Reset .

Before resetting a warning will display informing both LAN settings and webpages passwords will be
reset.

Select Yes to nalize the reset.

Figure 7.4 Reset

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Utilities Menu 71

Restore Default

Restore Default will set all LAN settings to their factory defaults.

To restore factory defaults:

Press the button then use the soft key to select Utilities > I/O Cong > LAN Settings > Restore
Default .

Before restoring LAN settings to default the following warning will display.

Figure 7.5 Restore Factory Defaults

Select Yes to set to factory default.

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Utilities Menu 72

LAN Status

LAN Status provides an overview of the LAN settings.

To view the LAN status:

Press the button then use the soft key to select Utilities > I/O Cong > LAN Status .

Figure 7.6 LAN Status

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Utilities Menu 73

7.3 GPIB (optional)

In GPIB the GPIB address can be changed from 01 to 30.

To change the GPIB address:

Press the button then use the soft key to select Utilities > I/O Cong > GPIB.

Figure 7.7 GPIB Address

Use the numeric keypad to enter the new address, then press the key.

The rotary knob can also be used to set the address. must be pressed to set the new address.

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Utilities Menu 74

7.4 Digital I/O

To enter the Digital I/O menu:

Press the button then use the soft key to select Utilities > I/O Cong > Digital I/O.

Select the function and polarity of pins: 1, 2, and 3.

• Pin Functions

– None

– Digital In | Out

– Trigger In | Out

– Fault Out/Inhibit In

– Polarity Pos | Neg

• Inhibit Mode

– O

– Latched

– Live

Figure 7.8 Digital I/O Menu

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Utilities Menu 75

7.4.1 Functions

Default: None

To congure a pin:

Press the button then use the soft key to select Utilities > I/O Cong > Digital I/O > Pin(#).

None

Set selected pin to have no function.

Digital In | Out

Toggle to select In/Out digital function.

Digital In: Receive a signal from external device.
Digital Out: Send a signal to external device.

The input voltage range for digital I/O pins is 0 V to 5 V. To prevent damage to

the instrument, do not exceed 5 V or supply a negative voltage to the digital I/O pins.

Trigger In | Out

Toggle to select In/Out trigger function.

Trigger In: Receives signal that triggers set event.
Trigger Out: Sent trigger signal when specied. (BOST or EOST)

In List Mode, the Trigger In function can be used to trigger the next step when Trigger Source is set to
Digital IO.

In Datalog, the Trigger In function can be used to start/stop data logging when Trigger Source is set
to Digital IO.

Trigger Out is only available for list mode, step BOST and EOST.

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Utilities Menu 76

Fault Out

Enable a fault condition, which generates a protection fault signal on the digital port.
Dierent conditions such as over voltage, over current, or over temperature will generate a fault event.
The fault event will “disable” all outputs without turning them o.
The outputs are “disabled” by setting the outputs as low as possible.

7.4.1 Polarity

Default: Positive

Set polarity of selected pin.

Positive

A logic true signal is received as a voltage high.

Negative

A logic true signal is received as a voltage low.

7.4.1 Inhibit Mode

Receive an external input signal that controls the output state of all channels.

Default: O

To set Inhibit Mode:

1. Assign the inhibit In function to pin 3 by:

Press the button then use the soft key to select Utilities > I/O Cong > Digital I/O > Pin 3 >
Inhibit In.

2. Select Inhibit Mode: Press the button then use the soft key to select Utilities > I/O Cong >
Digital I/O > Inhibit Mode.

3. Select one of the following modes:

Note:

The following modes are only available for pin 3.

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Utilities Menu 77

O

The inhibit input is ignored.

Latched

A logic-true transition signal will disable the power supply. The output will remain disabled.

Live

Power supply output follows the state of the inhibit signal. If the inhibit signal is true the output is disabled.
When it is false the output is enabled.

7.5 Test/Admin

7.5.1 Self Test

Run a Module test.

Press the button then use the soft key to select Utilities > Test/Admin > Self-Test > Start.

Figure 7.9 Self Test Complete

7.5.2 Security

The Security Settings are locked and can be accessed by entering the default code 77416699.

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Note:

Utilities Menu 78

Figure 7.10 Security Locked

The default password can be change in the Change Code menu. If the set code is forgotten contact
B&K Precision customer support.

Use the password to gain access to the following settings.

• Change Code

• Calibrate

• Firmware Update

• NISPOM

• Lock

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Utilities Menu 79

Change Code

Changes the security code.

Press the button then use the soft key to select Utilities > Test/Admin > Security > Change

Code.

Calibrate

Enter calibration mode.

Press the button then use the soft key to select Utilities > Test/Admin > Security > Calibrate .
See chapter Calibration Adjustment Procedure to adjust the units calibration.

Firmware Update

Update the rmware and module. Press the button then use the soft key to select Utilities >
Test/Admin > Security > Firmware Update .

NISPOM

Select for complete memory wipe. Press the button then use the soft key to select Utilities >
Test/Admin > Security > NISPOM .

Lock

Sets security status to Lock. Press the button then use the soft key to select Utilities > Test/Admin
> Security > Lock .

If Done is selected without locking the security settings, the user will be prompted that the security settings
will not be locked.

7.6 Error Log

View up to 50 previously set error codes.

Press the button then use the soft key to select Utilities > Error Log.

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Utilities Menu 80

Figure 7.11 Error Log

Errors are placed in the order that they were encountered. 1 being the most recent.
The error log displays up to 50 error codes.
After reaching 50 error codes no more codes will be reported in the error log.
To continue ling error codes the error log list must be cleared
The error log can be saved into a USB ash drive connected to the USB port on the front panel.

Save the log by:

Pressing the button then use the soft key to select Utilities > Error Log > Save .

Use the rotary knob and the button to navigate through the le path of the USB. Once the desired
location has been found select Save by pressing the softkey furthest to the left.

Clear the data log by:

Pressing the button then use the soft key to select Utilities > Error Log > Clear All > Yes.

Code Description

0x0001 Over Voltage Protection Triggered

0x0002 Over Current Protection Triggered

0x0004

0x0008 Sense not connected

Table 7.1 Status Code

Over Temperature

Protection Triggered

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7.7 Help

To enter the Help menu:

Press the button then use the soft key to select Utilities > Help.

Utilities Menu 81

Figure 7.12 Help Menu

Use the rotary knob to navigate the help options shown in gure 7.12.

To select the Quick help topic press the key or press the Select softkey.

System Info

To view the instrument’s general information:

Press the button then use the soft key to select Utilities > Help > System Info.

Figure 7.13 System Info

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Utilities Menu 82

7.8 On Screen Help

Press and hold any soft key that selects a menu branch for 3 seconds to receive an explanation of what
can be found in that branch.

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Key Lock

Lock all front panel keys including and .

Press the button then use press and hold the soft keys Key Lock for 3 seconds.

Figure 8.1 Key Lock

If Key Lock Output is enabled, holding Key Lock for 3 seconds locks all front panel keys except

and . See section 7.1.1 to enable/disable Key Lock Output.

To unlock the front panel use the softkey to select Unlock.

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Save/Recall

Save/Recall the instruments Output Settings and Power-On Settings.

9.1 Save the Output Settings

Save to Internal Memory

Save the instrument’s output settings to the internal memory. A total of 10 (0 to 9) output settings can be
saved.

To save the output settings :

Press the button then use the soft keys to select Save > Save to INT.

Using the numeric keypad enter a number from 0 to 9 to save the output settings to that address.
The settings will be saved after a short delay.

Figure 9.1 Save to Internal Storage

Save to USB

Save the instrument’s output settings to a USB ash drive connected to the front panel USB host port.

Press the button then use the soft keys to select Save > Save to USB.

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Save/Recall 85

Using the rotary knob navigate through the le paths of the USB. Use the button to expand folders.
Once the desired location has been found press Save.
The output settings will be saved after a short delay.

Figure 9.2 Save to USB

9.2 Recall the Instrument’s Settings

Recall previously saved output settings from the internal memory. A total of 10 (0 to 9) user settings can
be saved.

To recall settings :

Press the button then use the soft keys to select Recall > Recall from INT.

Use the numeric keypad to enter a number from 0 to 9 to recall the output settings stored in that address.
The settings will be recalled after a short delay.

Recall from USB

Recall the instrument’s output settings from a USB drive.

Press the button then use the soft keys to select Recall > Recall from USB.

Use the rotary knob to navigate through the le paths of the USB. Use the button to expand folders.
Once the desired location has been found press Load.
The settings will be recalled after a short delay.

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Figure 9.3 Recall from Internal Memory

Save/Recall 86

Figure 9.4 Recall from USB

9.3 Power-On Settings

Load previously saved output parameters on power-on.

O

To turn o Power-On Mode:

Press the button then use the soft keys to select Power-On Settings > Power- On Mode > O.

Last

To set the output parameters to the previous parameters before powering-o the instrument: Press the

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Save/Recall 87

button then use the soft keys to select Power-On Settings > Power- On Mode > Last.

User

To set the output parameters previously saved parameters:

• Press the button then use the soft keys to select Power-On Settings > Power- On Mode >
User.

• Press the button then use the soft keys to select Power-On Settings > User Settings.

• Use the numeric keypad or the rotary knob to assign an address (0 to 9).

To save settings see 9.1.

Default Values and Ranges

Set the instrument’s output settings to default.

Press the button then use the soft keys to select Set to Default.

9.4 Screenshot

To take a screenshot:

Press + together for 3+seconds until you hear a beep.

A USB must be plugged in for this function.

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Save/Recall 88

Parameter

9140 9141

Default Max Min Default Max Min

VSET 0 32.32 0 0 60.6 0 V

ISET 1 8.08 .015 1 4.04 .015 A

Vmax 32.32 32.32 0 60.6 60.6 0 V

Vmin 0 32.32 0 0 60.6 0 V

Vslew 1600 3200 0.001 600 3000 0.001 V/s

Islew 500 800 1 100 200 1 A/s

OVP Limit 35.2 35.2 0 66 66 0.000 V

OCP Limit 8.8 8.800 0.015 4.4 4.4 0.015 A

Timer 0 99:59:59 0 0 99:59:59 0 HH:MM:SS

On Delay 0 3600 0 0 3600 0 Sec

O Delay 0 3600 0 0 3600 0 Sec

Datalogger

Sampling Interval

List Dwell 0.1 9999 0.1 0.1 9999 0.1 Sec

0.2 300 0.200 0.2 300 0.2 Sec

Unit

List Voltage 1 96.96 0 1 181.8 0 V

List Current .015 24.24 .015 .015 12.12 .015 A

List Repeat 0 100000 0 0 100000 0

Table 9.1 Default Values & Ranges

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Calibration Adjustment Procedure

Calibration Interval

The recommended calibration interval for the 9140 series is one year.

To enter the Calibration Menu:

Press the button, then use the soft key to select Utilities > Test/Admin > Security > Calibrate.

In the Calibration Menu use the softkeys to select a parameter from the menu to calibrate.

• Voltage

• Current

• OVP

• OCP

• RTC

Figure 10.1 Calibration Parameters

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Calibration Adjustment Procedure 90

10.1 Voltage Calibration Adjustment

For the voltage calibration procedure a precise DMM will be needed.

To adjust the voltage calibration:

1. Enter the Calibration Menu

• Press the button, then use the soft key to select Utilities > Test/Admin > Security.

Use the numeric keypad to enter security code. See the subsection Security. Press the
button to enter the security menu.

2. Use the softkeys to select Voltage > CH {1 |2 |3}.

3. Verify the correct channel is chosen.

• The upper left corner will display the chosen channel. Voltage Calibration will have a frame with

the color corresponding to the chosen channel.

– Yellow = CH 1

– Blue = CH 2

– Orange = CH 3

4. Connect the DMM’s voltage input to the power supply’s binding post corresponding to the selected
channel.

5. Use the softkey to select Start.

6. Use the numeric keypad to enter the measured voltage. Press the button to congure the point.

7. Repeat step 6 for the remaining calibration points.

– Upon entering the last calibration point value the display will return to the channel selection screen.

8. Repeat steps 2 through 7 to calibrate the remaining channels.

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Calibration Adjustment Procedure 91

10.2 Current Calibration Adjustment

For the current calibration procedure a precise DMM will be needed.

To adjust the current calibration:

1. Enter the Calibration Menu

• Press the button, then use the soft key to select Utilities > Test/Admin > Security.

Use the numeric keypad to enter security code. See the subsection Security. Press the
button to enter the security menu.

2. Use the softkeys to select Current > CH {1 |2 |3}.

3. Verify the correct channel is chosen.

• The upper left corner will display the chosen channel. Current Calibration will have a frame with

the color corresponding to the chosen channel.

– Yellow = CH 1

– Blue = CH 2

– Orange = CH 3

4. Connect the DMM current input to the power supply’s binding post corresponding to the selected
channel.

Note:

Upon entering a calibration point the unit will immediately output the next current point.

To avoid blowing the DMM’s fuse ensure the correct DMM’s input is chosen.

The points’ output are as follows:

9140

1st Point 0.4 A
2nd Point 2.8 A
3rd Point 5.5 A
4th Point 8.0 A

9141

1st Point 0.2 A
2nd Point 1.4 A
3rd Point 2.7 A
4th Point 4.0 A

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Calibration Adjustment Procedure 92

5. Use the softkey to select Start.

6. Use the numeric keypad to enter the measured current. Press the button to congure the point.

7. Repeat step 6 for the remaining calibration points.

– Upon entering the last calibration point value the display will return to the channel selection screen.

8. Repeat steps 2 through 7 to calibrate the remaining channels.

10.3 OVP Calibration Adjustment

For the over voltage protection calibration the instrument’s voltage must be calibrated.

To adjust the OVP calibration:

1. Enter the Calibration Menu

• Press the button, then use the soft key to select Utilities > Test/Admin > Security.

Use the numeric keypad to enter security code. See the subsection Security. Press the
button to enter the security menu.

2. Use the softkeys to select OVP > CH {1 |2 |3}.

3. Verify the correct channel is chosen.

• The upper left corner will display the chosen channel. OVP Calibration will have a frame with the

color corresponding to the chosen channel.

– Yellow = CH 1

– Blue = CH 2

– Orange = CH 3

4. Connect the DMM’s voltage input to the power supply’s binding post corresponding to the selected
channel.

5. Use the softkey to select Start.

6. Calibration State will show as Busy. After a few seconds the calibration will be adjusted on its own.

7. Upon successfully completing the calibration adjustment a dierent channel can be selected.

8. Repeat steps 2 through 6 to calibrate the remaining channels.

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Calibration Adjustment Procedure 93

10.4 OCP Calibration Adjustment

For the over current protection calibration the instrument’s current must be calibrated.

To adjust the OCP calibration:

1. Enter the Calibration Menu

• Press the button, then use the soft key to select Utilities > Test/Admin > Security.

Use the numeric keypad to enter security code. See the subsection Security. Press the
button to enter the security menu.

2. Use the softkeys to select OCP > CH {1 |2 |3}.

3. Verify the correct channel is chosen.

• The upper left corner will display the chosen channel. OCP Calibration will have a frame with the

color corresponding to the chosen channel.

– Yellow = CH 1

– Blue = CH 2

– Orange = CH 3

4. Connect the DMM’s 10 A input to the power supply’s binding post corresponding to the selected
channel.

5. Use the softkey to select Start.

6. Calibration State will show as Busy. After a few seconds the calibration will be adjusted on its own.

7. Upon successfully completing the calibration adjustment a dierent channel can be selected.

8. Repeat steps 2 through 6 to calibrate the remaining channels.

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Calibration Adjustment Procedure 94

10.5 RTC Calibration Adjustment

To adjust the Real-Time Clock(RTC) calibration:

1. Enter the Calibration Menu

• Press the button, then use the soft key to select Utilities > Test/Admin > Security.

Use the numeric keypad to enter security code. See the subsection Security. Press the
button to enter the security menu.

2. Use the softkeys to select RTC.

3. Use the softkey to select Start.

4. Calibration State will show as Busy. The calibration will be adjusted on its own in about 4 to 5 mins.

5. Calibration State will show as Success once the calibration has nished.

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Performance Verication

Performance verication ensures the instrument will meet specications listed in the datasheet.
Load regulation can be tested for both the front and rear outputs.

Note:

All specications apply to the unit after a temperature stabilization time of 15 minutes over an ambient
temperature range of 23 °C ± 5 °C. Specications are valid for single unit operation only.

CV Load Regulation Front Panel Output

1. Turn o the power supply before making any connections.

2. Connect the: DMM, electronic load, and the rear panel remote sense to the power supply’s terminal
being tested.
(Remote sense must correspond with the channel being tested.)

Figure 11.1 Front Panel Wiring Diagram

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Performance Verication 96

Note:

Keep all cables as short as possible.

3. Turn on the power supply.

4. Set the power supply settings of the channel being tested to the values given in table 11.1.

5. Set the electronic load settings to the stated values in table 11.1.

6. Enable remote sense. See section Remote Sense.

7. Enable the channel output.

8. Enable the electronic load. Monitor the power supply to ensure it remains in CV mode.If the power
supply switches to CC slightly lower the current on the electronic load until the power supply return
to CV mode.

9. Give the power supply some time to settle and record the DMM reading as V load.

10.Disable the electronic load and record the DMM reading as V noload.

11.Take the dierence between V load and V noload (V load - V noload) and record the value as the
voltage regulation. The dierence should be within the specication limit.

CV Load Regulation Rear Panel Output

1. Turn o the power supply before making any connections.

2. Connect the: DMM, electronic load, and the rear panel remote sense to the power supply’s rear +/­terminal being tested.Use jumpers to connect the +S to + and -S to -. See gure 11.2
(Remote sense must correspond with the channel being tested.)

3. Turn on the power supply.

4. Set the power supply settings of the channel being tested to the values given in table 11.1.

5. Set the electronic load settings to the stated values in table 11.1.

6. Enable remote sense. See section Remote Sense.

7. Enable the channel output.

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Performance Verication 97

Figure 11.2 Rear Panel Wiring Diagram

8. Enable the electronic load. Monitor the power supply to ensure it remains in CV mode.If the power
supply switches to CC slightly lower the current on the electronic load until the power supply return
to CV mode.

9. Give the power supply some time to settle and record the DMM reading as V load.

10.Disable the electronic load and record the DMM reading as V noload.

11.Take the dierence between V load and V noload (V load - V noload) and record the value as the
voltage regulation. The dierence should be within the specication limit.

Model

Voltage Current

9140 32.000 V 3.069 A Enabled CC 3.065 A - 6.2 mV + 6.2 mV

9141 60.000 V 1.666 A Enabled CC 1.650 A - 9 mV + 9 mV

Remote

Sense

Table 11.1

Load Settings

Mode Current Lower Limit Upper Limit

Power Supply Settings Electronic

Load Regulation Limit

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Specications

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