B&K Precision 9120A, 9121A, 9122A, 9123A, 9124 Instruction Manual

Model: 9120A, 9121A, 9122A, 9123A, 9124, 9150, 9151, 9152, 9153

Single Output Programmable DC Power

Supply

USER MANUAL

Safety information

Please review the following safety precautions before operating our equipment.

General information

The following safety precautions should be observed before using this product and any associated instrumentations.

This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before using the product. Refer to this manual for complete product specifications.

If the product is used in a manner not specified, the protection provided by the product may be impaired.

Before performing any maintenance, disconnect the line cord and all test cables.

Protection from electric shock

Operators of this instrument must be protected from electric shock at all times. The responsible body must ensure that operators are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential human contact.

Under these circumstances personnel must be trained to protect themselves from the risk of electric shock. If the circuit is capable of operating at or above 1000 volts, no conductive part of the circuit may be exposed.

Definition of users

Responsible body is the individual or group responsible for the use and maintenance of equipment is operated within its specifications and operating limits, and for ensuring that operators are adequately trained.

This product should only be used as intended. Users must be trained in electrical safety procedures and proper use of the instrument. Users must be protected from electric shock and contact with hazardous live circuits. Service is only to be performed by qualified service personnel.

Safety symbols and terms

Connect to safety earth ground using the wire recommended in the user manual.

This symbol on an instrument indicates that the user should refer to the operating instructions located in the manual.

Certification

We certify that this product met its published specifications at time of shipment from the factory.

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	TABLE OF CONTENTS
1. Introduction............................................................................................................		4
	Description ...............................................................................................................................................	4
	Features ....................................................................................................................................................	4
2. Quick Reference.....................................................................................................		5
2.1 The Front Panel ..........................................................................................................................................		5
2.2 The Rear Panel .........................................................................................................................................		6
2.3	Preliminary Checkout.................................................................................................................................	7
	1. Check the list of supplied items............................................................................................................	7
	2. Connect the power cord and turn on the power supply ........................................................................	7
	3. Checkout Procedure .............................................................................................................................	7
1.4	Output Verification .....................................................................................................................................	8
	Voltage Output Check...............................................................................................................................	8
	Current Output Check ..............................................................................................................................	9
1.5	If the power supply does not turn On .........................................................................................................	9
	1.5.1 Fuse Replacement............................................................................................................................	9
1.6 Adjusting the Carrying Handle.................................................................................................................		10
1.7	Rack Mounting the Instrument.................................................................................................................	11
3. Front-panel Operation ........................................................................................		12
3.1	Front Panel Keys ......................................................................................................................................	12
	Numerical Keys/Secondary Shift Functions...........................................................................................	13
	Shift Functions .......................................................................................................................................	13
	Primary Function Keys...........................................................................................................................	13
	Up/Down and Entry key.........................................................................................................................	13
3.2	Front-panel Operation Overview..............................................................................................................	14
3.3	Setting the Voltage....................................................................................................................................	14
3.4	Setting the Current....................................................................................................................................	14
3.5	Save and Recall Operation .......................................................................................................................	14
3.6	Menu Operation........................................................................................................................................	15
	3.6.1 Menu Description..........................................................................................................................	15
	3.6.2 Menu Function ..............................................................................................................................	17
3.7	Output Operation......................................................................................................................................	22
3.8	Remote Sense and digital port functions..................................................................................................	22
3.9	Digital Volt Meter (DVM)........................................................................................................................	23
3.10 Milliohm Meter ......................................................................................................................................		24
4. Remote Operation................................................................................................		24
4.1	Serial adapter cables.................................................................................................................................	25
4.2	Communication between Power Supply and PC......................................................................................	26
4.3 SCPI Command Overview .......................................................................................................................		28
	Common IEEE488.2 Commands ...........................................................................................................	28
	Essential SCPI Commands.....................................................................................................................	28
	Port Configuration Commands...............................................................................................................	30
	Trigger Command ..................................................................................................................................	30
	SCPI Condition Register ........................................................................................................................	30
4.4	SCPI Command Description ....................................................................................................................	32
	Common IEEE488.2 Commands ...........................................................................................................	32
	Essential SCPI Commands.....................................................................................................................	34
	Output Commands..................................................................................................................................	37
	List File Commands ...............................................................................................................................	38
	Interface Configuration Commands .......................................................................................................	42
	Trigger commands..................................................................................................................................	43
	Calibration commands............................................................................................................................	44
5. Specifications........................................................................................................		46
5.1	Specifications ...........................................................................................................................................	46
5.2	Supplemental Characteristics ...................................................................................................................	48

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1. Introduction

Description

Models 9120A, 9121A, 9122A, 9123A, 9124, 9150, 9151, 9152, and 9153 are fully programmable, linear DC Power Supplies that provide you with clean and reliable power, high resolution and accuracy combined with fast transient response times and excellent temperature stability. The front panel keys and the control knob provide a convenient interface for adjusting Voltage and Current, storing and recalling operating states or enabling/disabling the output. This power supply is suitable for either bench or rack mounted operation. The 912xA is a compact, laboratory grade power supply well suited for applications in design, production or use in university labs.

Features

Very high accuracy and resolution: 0.1 mV, 0.1 mA

Low ripple and low noise

Fast settling time of <150 μs

		5	1	digit digital voltage meter and mΩ meter
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Convenient data entry via knob or numerical key pad

Over Temperature (OTP) protection

Bright and easy to read display (VFD technology)

Excellent temperature stability

Output on/off control

SCPI compatible command set. Communicate via USB, RS232 or GPIB (model 9123A only) interface

Application Software for front panel emulation and simple test sequence generation

Rack mount kit available

Closed case calibration

Remote Sense Function

Discrete Fault Indicator/Remote Inhibit (DFI/RI). Can be used to turn off power supplies simultaneously. (DFI available for models 9120A, 9121A, 9122A, 9123A, 9124 only)

List Mode: Generate, store and execute test sequences without the need for an external computer

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2. Quick Reference

2.1 The Front Panel

For Models: 9120A, 9121A, 9122A, 9123A, 9124

1

2

3	4	5	6	7
For Models: 9150, 9151, 9152, 9153
1			2

3

4

5

6

8

7

1VFD display

2Rotary knob

3Power switch

4Numeric keys, auxiliary. functions

5

5Function keys

6Up/Down keys and “Enter” key

7Output terminals

8Digital Voltmeter terminals (For Model 9150, 9151, 9152, 9153)

2.2The Rear Panel

For Models: 9120A, 9121A, 9122A, 9123A, 9124

1

2

3

4

5

6

For Models: 9150, 9151, 9152, 9153

2

3

5

6

4

6

1

2

3

4

5

6

2.3 Preliminary Checkout

Digital Voltmeter terminals. (For models 9150, 9151, 9152, and 9153, these terminals are in the front panel)

AC power inlet and fuse compartment

Ventilation holes

Quick connect terminal for Remote sensing and digital port functions (digital I/O, DFI/RI and ext. trigger)

TTL interface connector for remote control

AC Power selection switch (110 V / 220 V)

The following steps help you verify that the power supply is ready for use.

1. Check the list of supplied items

Verify that you have received the following items with your power supply. If anything is missing, contact your authorized B&K Precision distributor.

-Power cord

-Instruction manual

-Calibration Report

-Communication cable(s)

-Software Installation disk

2. Connect the power cord and turn on the power supply

When you turn on the power supply, the front-panel display will light up briefly while the power supply performs its power-on self-test. All the VFD annunciators will turn on at once. Check for any missing display segments. Refer to section 1.5 in this chapter if the power supply does not turn on.

3. Checkout Procedure

At power up, the instrument will automatically perform a self test routine. During this time, the following should be displayed:

System Test, Please wait!

followed by

0.000V 0.0000A

0.000V 0.000V

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The first row displays the actual output voltage value and current and the state of power supply. The second row displays the voltage measured by the DVM (on left) and the Set Value for the voltage of the power supply.

To obtain additional information about the instrument, press and hold the SHIFT button during Power Up. On the display you will see the following:

First row:	V/A rating and DVM voltage range
second row:	Firmware version and serial number
		Sourc: XXV XA Meas: XXV
		Ver: 1.67 SN:5975002002

Press “Esc” to exit the display.

In case the self test routine is not successful, you may see one of the following:

If the EEPROM was damaged or the latest operation data is lost, the VFD will display:

ERR EEPROM

If the calibration data stored in the EEPROM is lost, the VFD will display

ERROR CAL

If the latest operating state of the power supply in EEPROM is lost, the VFD will display:

Error Config Data

Warning: The power supply is shipped from the factory with a power-line cord that has a plug appropriate for your location. Your power supply is equipped with a 3-wire grounding type power cord; the third conductor being the ground. The power supply is grounded only when the power-line cord is plugged into an appropriate receptacle. Do not operate your power supply without adequate cabinet ground connection.

1.4 Output Verification

The following procedures verify that the power supply outputs the correct voltage and current levels and properly responds to entries from the front panel.

Voltage Output Check

The following steps verify basic voltage functions without load.

1)Turn on the power supply.

2)Enable the outputs

Press the Out on/off key. Notice the CV annunciator turning on.

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3) Set the voltage value

Set a different voltage value. Make sure that the set value and output value are the same. Also check if the output current value is zero or close to zero A.

4) Ensure that the voltage can be adjusted from zero to the maximum rated value.

Current Output Check

The following steps check the basic current functionality by shorting the power supply’s output.

1)	Turn on the power supply.
2)	Disable the output by pressing the Out on/off . The ON annunciator is turned off.

3)Connect a short across the (+) and (-) output terminals with an insulated test lead. Use a wire size sufficient to handle the maximum current.

4)Enable the output.

5)Adjust the voltage value to 1.0 volt. Ensure that the CC annunciator is lit (power supply is in CC operation mode)

6)Adjust the current value. Set a different Current value and check if the actual Current value is the same as the set Current value. Also verify that the output voltage value is nearly zero.

7)Ensure that the current can be adjusted from zero to the full rated value.

8)Turn off the power supply and remove the short wire from the output terminals.

1.5If the power supply does not turn On

Use the following steps to help resolve problems you might encounter when turning on the instrument.

1. Verify that there is AC power applied to the power supply.

Verify that the power cord is firmly plugged into the power receptacle on the rear panel of the power supply. Make sure the power outlet you are using is working properly and verify that the power supply is turned on.

2. Verify the power-line voltage setting.

Make sure the voltage selector switch is set according to the present line voltage (110 VAC or 220 VAC). Change the voltage setting if it’s not correct.

3. Verify that the correct power-line fuse is installed.

1.5.1 Fuse Replacement

Model	Fuse Description (110 VAC)		Fuse Description (220 VAC)
9120A	T2.5A	250V	T1.25A	250V
9121A	T2.5A	250V	T1.25A	250V
9124	T2.5A	250V	T1.25A	250V
9122A	T3.15A	250V	T1.5A	250V
9123A	T3.15A	250V	T1.5A	250V
9150	T10A	250V	T5A	250V
9151	T10A	250V	T5A	250V
9152	T10A	250V	T5A	250V
9153	T10A	250V	T5A	250V

Replace blown fuses according to the table above.

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1.6 Adjusting the Carrying Handle

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

Dimensions:

214.5 mm (W) x 88.2 mm (H) x 354.6 mm (D) all units in mm

For Models: 9120A, 9121A, 9122A, 9123A, 9124

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For Models: 9150, 9151, 9152, 9153

1.7 Rack Mounting the Instrument

You can mount the power supply in a standard 19-inch rack cabinet using the IT-E151 rack mount kit.

Note: Remove the carrying handle and the two plastic ears before rack-mounting the instrument. To remove the handle, grasp the handle on the side, pull outwards and rotate it to a special position where the arrow on the handle and the arrow on the plastic ears are in opposite directions. Now you can pull the handle outwards. After removing the handle, you can remove the two plastic ears with a screw driver.

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To rack mount a single instrument, order rack mount kit IT-E151

To rack mount two instruments (models 9120A, 9121A, 9122A, 9123A, 9124 only) side-by-side, order rack mount kit IT-E151, In this case you don’t need to use the front cover panel.

3. Front-panel Operation

So far we have covered the quick start chapter which briefly introduced the front panel operation and how to check basic voltage and current functionality. This chapter describes in detail how to operate the instrument manually via the front-panel keys.

This chapter is divided into the following sections:

Front-Panel Operation Overview

Setting the Voltage

Setting the Current

Save/Recall Operation

Menu Operation

On/Off Operation

Remote Sense and digital port functions

mΩ Meter

Digital Voltage Meter

3.1Front Panel Keys

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Numerical Keys/Secondary Shift Functions

Shift Functions

V/mΩ: Toggle between DVM and mΩ Meter mode

0.1 W:		Set the range of the mΩ Meter to 0.1 W
1 W:		Set the range of the mΩ Meter to 1 W
10 W:		Set the range of the mΩ Meter to 10 W
Menu		Set the parameters of the power Supply
List		Generate programs in List Mode
Trigger		Generate a single trigger pulse (when configured for Immediate mode)
Local		Enable front panel operation when in remote mode
0 – 9		Numerical keys for direct entry of values
Primary Function Keys
		V-set	Set the voltage value
		I-set	Set the current value
		Save	Save the current operating data to internal memory
		Recall	Recall operating data from internal memory
	On/Off		Set the output state of the power supply
		Shift	Use to access secondary functions

Up/Down and Entry key

▲ Up key

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I-Set

▼ Down key

Enter: Press to confirm numerical entries

3.2 Front-panel Operation Overview

1)The power supply at shipment is preconfigured for front-panel operation. At power-on, the power supply will automatically start up in front panel operation mode.

2)When the power supply is in remote operation mode, the front-panel is disabled. You can revert to Local mode, by pressing the Local button or by sending the appropriate SCPI command. Toggling between front-panel and remote operation modes will not result in any change of the output parameters.

3)The output of the power supply can be enabled or disabled from the front panel by pressing

the Out on/off key. When the output is on, the CV or CC annunciator will turn on.

4)The VFD annunciators display the present operating status of the power supply. At power up, the following is displayed: The top row shows the actual output voltage and output current value and the state of the power supply. The second line shows the voltage value as measured by the DVM and the Set value of the Voltage. The bottom right field is also used to display the Current Set Value, the Menu parameters and the Ohm meter range.

3.3 Setting the Voltage

The Voltage can be adjusted from 0V to the maximum rated voltage of each model. There are 2 ways to set the constant voltage value.

Solution1

Press the ▲ and ▼ keys or the knob to change the value of the least significant digit

Solution2:

1. Press	V-set
2. Use the numeric keys 0 to 9		and confirm your entry by pressing Enter

3.4 Setting the Current

The Current output is adjustable from 0A to the maximum current value of each model.

1. Press

2. Enter a numerical value or use the ▲and ▼keys to change the current value 3. Press Enter to confirm the value

3.5 Save and Recall Operation

You can store up to 50 different operating states in memory locations 1 through 50. Each operating state includes a constant voltage value, constant current value, maximum output voltage value and voltage step value.

To save a setting:

Set the desired Voltage and Current value

Press the save Save key. Use the knob to scroll to one of the memory locations 1 – 50. Press ENTER

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to assign and store the current settings to the selected memory location To recall a setting:

Press the Recall key. Use the knob to scroll to the memory location where the settings you want to recall are stored. Press ENTER to recall and activate those settings

You can also use the SCPI command:*SAV *RCL to save and recall respectively.

3.6 Menu Operation

3.6.1 Menu Description

Press Shift :Menu to enter menu mode. The menu parameters will be displayed in the bottom right field of the display. Use the ▲ and ▼ keys to scroll through the menu list and press ENTER to select a menu and view the

parameters. Press ESC to return to the higher level menu and to return to the main operating mode.

MENU
Config
		Config	Init.			Return to the factory default setup value.
		Out Recall				Set the Power ON/OFF state after power up.
			On				“Remembers” and restores the Power ON/OFF state of the
							power supply before power was turned off.
			Off<Default>				Disable this function.
		PWR-	ON Recall			Recall operating parameters of power supply after power up
			On				“Remembers” and restores the operating parameters of the
							power supply (voltage, current settings..) before power was
							turned off.
			Off<Default>				Disable this function.
		Key Sound Set				Keypad sound setting.
			On<Default>				Enable key sound.
			Off				Disable key sound
		Knob	Lock Set				Enable/disable the rotary knob.
			On				Lock the rotary knob.
			Off< Default >				Unlock the rotary knob.
		Remote	Sense	Setup				voltage measurement Mode.
			On					The power supply will measure the input voltage at the
								remote sense connector.
			Off< Default >					The power supply will measure the input voltage at the
								front panel connector.
	ShortCut		Call	Shortcut of the recall function
			On					Enable this function
			Off<Default>					Disable this function
		Meter	Rate	Set the				update speed of the power supply meter
			High					High speed
			Low <Default>						Low speed
		Baudrate	Set
			Baudrate 4800 <Default>
			Baudrate 9600
			Baudrate 19200
			Baudrate 38400
		Comm.	Parity	Configure					the parity bit.

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Save Mode Set

8 X 25 Steps

4 X 50 Steps

None< Default >

Even

Odd

	Address Set			Set the communication address (range from 0 to 30)
		Address=
	Port Mode			Select	mode of digital port
			Trigger< Def >
			RI/DFI		Note: DFI is not available for models 9150, 9151, 9152,
					9153
			DIGITAL I/O		Note: Digital output not available for models 9150, 9151,
					9152, 9153
	Trig Source			Setting		the trigger mode
		Immediat<Def>					Pressing	Shift	+ Trigger keys will generate a
							trigger pulse
		External					Ext. Trigger signal is applied to the digital port in the rear
							panel.
		Bus					Remote command trigger mode.
	RI Mode			Configure the Remote Inhibit (RI) mode
		Off< Default >					Disable this function
		Latching
		Live
	DFI Source			Configure			the Discrete Fault Indicator (DFI) mode
				Note:			Not used for models 9150, 9151, 9152, 9153
		Off< Default >
		QUES					Question Bit
		OPER					Operation Bit
		ESB					Event State Bit
		RQS					Require Bit
	Key Lock Set			Setting		keypad password.
				Press			Enter	directly to disable the key lock function.
			Password= ****
	Exit
System	Set
	Max Volt. set			Set the Maximum Voltage.
		Max= ****
	Step Volt Set			Set the		voltage step
		Step=****
	Exit
List Set			Configure list files
	Call ListFile			Recall list operation file.
			Recall *
	Edit ListFile			Edit list		operation file.
			Continuous

Once

Repeat

Step

Once

Repeat

Users can allocate 4 types of memory space to save the list file.

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