B&K 1787B User Manual

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Instruction Manual

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Model 1785B, 1786B, 1787B & 1788 Programmable DC Power Supplies

Content

 

Quick Reference ..............................................................................................................................

3

About your safety......................................................................................................................

3

 

General information...........................................................................................................

3

 

Protection from electric shock ...........................................................................................

3

 

Definition of users..............................................................................................................

3

Introduction ...............................................................................................................................

4

The Front Panel at a Glance ....................................................................................................

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Function keys description .........................................................................................................

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Menu description ......................................................................................................................

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Display annunciators ................................................................................................................

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The Rear Panel at a Glance .....................................................................................................

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Chapter 1 Quick Start ......................................................................................................................

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1.1

Preliminary Checkout .........................................................................................................

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1.2

Output Checkout.................................................................................................................

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1.2.1 Voltage Output Checkout .........................................................................................

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1.2.2 Current Output Checkout .........................................................................................

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1.3

If the Power Supply Does Not Turn On ............................................................................

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1.4

To Adjust the Carrying Handle .........................................................................................

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1.5

To Rack Mount the Instrument .........................................................................................

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Chapter 2 Specifications ................................................................................................................

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2.1

Specifications....................................................................................................................

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2.2

Supplemental Characteristics...........................................................................................

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Chapter 3 Front-panelOperation...................................................................................................

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3.1

Front-panelOperation Overview ......................................................................................

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3.2

Constant Voltage Operation .............................................................................................

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3.3

Constant Current Operation .............................................................................................

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3.4

Saving and Recalling Operation .......................................................................................

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3.5

Menu Operation ................................................................................................................

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Chapter 4 Remote Operation Mode...............................................................................................

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4.1

Communication setting .....................................................................................................

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4.2

DB9 interface details.........................................................................................................

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4.3

Frame format ....................................................................................................................

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4.4

Communication protocol...................................................................................................

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Chapter 5 Calibration .....................................................................................................................

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5.1 Configuration .............................................................................................................

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5.2

Voltage calibration ............................................................................................................

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5.3

Current calibration ............................................................................................................

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5.4

Reset to the default calibration settings ...........................................................................

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Chapter 6 PV1785B_1788 Software..............................................................................................

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6.1

Introduction .......................................................................................................................

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6.2

System installation............................................................................................................

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6.3

PV1785B_1788 Functions................................................................................................

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6.3.1Configure the system ..............................................................................................

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6.3.2 Status bar ...............................................................................................................

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6.3.3 Setting Voltage and current....................................................................................

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6.3.4. GO/NG Test Function ............................................................................................

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6.3.5 Save and Open ......................................................................................................

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6.3.6 Present Voltage/Current Chart ...............................................................................

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6.3.7. Chart Description...................................................................................................

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Certification and Warranty ........................................................................................................

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Certification..........................................................................................................................

 

 

Warranty ..............................................................................................................................

 

 

Limitation of Warranty .........................................................................................................

 

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Quick Reference

About your safety

Pease 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. Although some instruments and accessories would be used with non-hazardousvoltages, there are situations where hazardous conditions may be present.

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. Product operators in these circumstances 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.

Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the instrument. They 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 it to safety earth ground using the wire recommended in the user manual.

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

High voltage danger

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Certification and Warranty

Certification

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

Introduction

The 1785B - 1788 Series power supplies are high performance single-outputprogrammable DC power supplies with communication interface. The combination ofbench-topand system features in these power supplies provides versatile solutions for your design and test requirements.

Convenient bench-topfeatures:

Nice appearance, small-sizeand light weight

VFD display

Soft Rubber numeric keypad

Adjustable & constant voltage outputs

Adjustable & constant current outputs

Output on/off

High accuracy and high resolution

Excellent load and line regulation

Low ripple and noise

Limit voltage protection

Over current/temperature protection

Sixteen operating states storage

May be used in series or parallel modes with additional power supplies

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The Front Panel at a Glance

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?10 digits VFD display

?Status information for operating mode and working status

?Power switch

?Number keys

?Function keys

?UP/DOWN and ENTER key

?Output terminals

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Function keys description

V-set

Set the output voltage value

 

I-set

Set the current value

 

Save the present settings to a specified register location(1~16)

Save

Recall a saved settings from location ‘‘1’’through ‘‘16’

Recall

Menu function to set related parameters of the power supply

Menu

Output ON/OFF, to enable/disable the output

Out on/off

Menu description

Menu

 

 

 

 

 

 

>MAX VOLT

Set the maximum output voltage value

 

>INIT OUT

Initiate the output state to ON or not

 

>INIT VOL

Initiate the output voltage to 0 volt or not

 

>KEY SOUN

Switch On/Off the buzzer sound when you press

 

 

any key

 

>BAUDRATE

Set the communication baud rate

 

>ADDRESS

Set the communication address

 

>KEY LOCK

Set the password for function keys

 

>EXIT

Exit

Display annunciators

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ON

Output ON

Link The power supply is in communication

Oh

Overheat protection state

 

mode

CV The power supply is in constant

Rmt The power supply is in remote mode

 

voltage mode.

Cal

The power supply is in calibration mode

CC The power supply is in constant

 

The function keys are locked by password

 

current mode.

 

 

 

 

Unreg The output of the power supply

 

The rotate speed of cooling fan

 

is unregulated (neither CV nor CC)

 

 

 

 

 

 

 

 

The Rear Panel at a Glance

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?Cooling window

?DB9 interface connector

?110V/220V selector

?Fuse

?Power socket

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Chapter 1 Quick Start

One of the first things you will want to do with your power supply is to become acquainted with the front panel. The exercises in this chapter prepare the power supply for use and help you get familiar with some of its front-paneloperations.

This chapter is intended for both the experienced and the inexperienced user because it calls attention to certain checks that should be made prior to operation.

1.1 Preliminary Checkout

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 nearest Sales Office.

?One power cord for your location

?This User’s Manual.

?Communication cable (optional)

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

When you turn on the power supply, the front-paneldisplay will light up briefly while the power supply performs itspower-onself-test.All the VFD annunciators will light up at once. To review the display with all annunciators, you can check if there is any stroke loss on any annunciator. If there isn’t any response when you power on the power supply, please see Section 1.5 on page 10 for some service information.

If the EEPROM was damaged or the latest operation data in EEPROM was lost, the VFD will display as follows:

ERR EEPROM

If the calibration data in EEPROM was lost, the VFD will display as follows:

ERROR CAL

Warning: Your power supply is equipped with a3-wiregrounding type power cord; the third conductor being the ground. The power supply is grounded only when thepower-linecord is plugged into an appropriate receptacle. Do not operate your power supply without adequate cabinet ground connection.

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Out on/off

1.2 Output Checkout

The following procedures check to ensure that the power supply develops its rated outputs and properly responds to operation from the front panel.

1.2.1 Voltage Output Checkout

The following steps verify basic voltage functions without load.

1.Turn on the power supply.

2.Enable the outputs.

Press Out on/off key to let theON annunciator and theCV annunciator turn on to light.

Notice: if the voltage value flash, then the power supply is inSet mode, ‘‘Set mode’’ means that the VFD display shows the setting output voltage and current. Or the power supply is inMeter mode, ‘Meter mode” means that the VFD display shows the actual output voltage and current.

3. Check that the front-panelvoltmeter properly responds to number keys

Set some different voltage values, then wait till the Meter mode to check if the VFD displayed voltage value is the same as the set voltage value, and to check if the VFD displayed current value is nearly zero.

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

1.2.2 Current Output Checkout

The following steps check basic current functions with a short across the power supply’s output.

1.Turn on the power supply.

2.Disable the output

Press Out on/off key to ensure that the output is disabled. TheON annunciator is turned off.

3. Connect a short across (+) and (-)output terminals with an insulated test lead.

Use a wire size sufficient to handle the maximum current.

Warning: To satisfy safety requirements, load wires must be heavy enough not to overheat when carrying the maximumshort-circuitoutput current of the power supply. If there is more than one load, then any pair of load wires must be capable of safety carrying thefull-ratedcurrent of the power supply.

4. Enable the output.

Press key to ensure that the output is enabled. The ON annunciator is turned on.

5.Adjust the voltage value to 1.0 volt.

Adjust the voltage to 1.0 volt to ensure the power supply is in CC operation mode. The CC annunciator will turn on.

6.Adjust the current value.

Set some different voltage values, then wait till the Meter mode to check if the VFD displayed current value is the same as the set voltage value, and to check if the VFD displayed voltage value is nearly

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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.

1.3 If the Power Supply Does Not Turn On

Use the following steps to help solve problems you might encounter when turning on the instrument. If you need more help, refer to chapter 6 for instructions on returning the instrument to the supplier for service.

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

First, verify that the power cord is firmly plugged into the power receptacle on the rear panel of the power supply. You should also make sure that the power source you plugged the power supply into is energized. Then, verify that the power supply is turned on.

2. Verify the power-linevoltage setting.

The line voltage is set to the proper value for your country (110VAC or 220VAC. Change the voltage setting if it’s not correct.

3. Verify that the correct power-linefuse is installed.

If the fuse was damaged, please see the table below to replace the fuse for your power supply.

Fuse Description

Fuse 2.5A T 250V for 220VAC

Fuse 5A T 250V for 110VAC

1.4 To Adjust the Carrying Handle

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

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