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Philips Note: LOW = 0 to 0.8V and HIGH = 2 to 5V Tri, gg, er bus control:, nored., Note: STEP pulses, received while the READY line is low, will be i

Models: PM2811 PM2812 PM2813 PM2831 PM2832

1 115

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Usin

g

your Pro

g

rammable Power Supply 5 - 27

There is a standard GPIB interface connector at the rear. The GPIB interface

software supports complete tri

gg

er capability.

If the tri

gg

er source = TIMer, the internal timer of the power supply is used to count

the interval time between two consecutive steps.

If the tri

gg

er source = EXTernal or BUS, the active tri

gg

er source depends on

whether or not the START line of the tri

gg

er bus at the rear is active.

EXTERNAL STEPPING (via the tri

gg

er bus)

If the START line is active (LOW), step pulses from the external STEP input

line will cause the next step to be performed.

EXTERNAL STEPPING (via the GPIB)

If the START line is not active (HIGH), the next step will be performed on the

receipt of the *TRG command or the GET code via the GPIB.

Note: LOW = 0 to 0.8V and HIGH = 2 to 5VTri

gg

er bus control:

External steppin

g

via the tri

gg

er bus can be done in two ways:

1) In the synchronous mode:

In this mode all three bus si

g

nal lines have their own functions.

2) In the asynchronous mode:

In this mode the READY line is externally connected to the START line.

To control the recall memory via the tri

gg

er bus, the STEP mode may not be

automatic, and the START input line must be pulled LOW. This will enable the

STEP line to tri

gg

er the next step to be executed (external tri

gg

erin

g

). Pullin

g

the

START line LOW will also disable the manual STEP key.

When enabled, a STEP pulse will tri

gg

er the step mechanism. The leadin

g

ed

g

e

of the STEP pulse makes the READY line active (LOW) within 100 nanoseconds.

The READY line will be released when the internal processin

g

is finished and the

STEP line is HIGH. The internal processin

g

time does not include the

repro

g

rammin

g

delay time. It is the responsibility of the user to choose a STEP

rate that is not too hi

g

h for the power supply and its load condition, so that the

output can settle within the STEP time.

Note: STEP pulses, received while the READY line is low, will be i

g

nored.

Contents

Main PM2811-PM2812-PM2813 PM2831-PM2832 Users Manual Page Pro rammable Power Supplies III LIMITED WARRANTY & LIMITATION OF LIABILITY Page CONTENS 1 OPERATOR SAFETY 2 INTRODUCTION 3 INSTALLATION INSTRUCTIONS 4 GETTING FAMILIAR WITH THE POWER SUPPLY 5 USING YOUR PROGRAMMABLE POWER SUPPLY Page Page Page INSIDE THIS MANUAL Page 1 OPERATOR SAFETY 1.1 INTRODUCTION 1.2 SAFETY PRECAUTIONS 1.3 CAUTION AND WARNING STATEMENTS CAUTION: Is used to indicate correct operatin 1.4 SYMBOLS 1.5 IMPAIRED SAFETY 2 INTRODUCTION 2.1 INTRODUCTION TO YOUR PROGRAMMABLE POWER SUPPLY Page ! Single rear panel (PM2811 only) !!! -S -V +V +S -S -V +V +S READY START 2.2 BASIC OPERATION Page Page IEEE 488.2 compatibility SCPI compatibility Page Page Page Page 2.3 ADVANCED OPERATION Page Page 3 INSTALLATION INSTRUCTIONS 3.1 INTRODUCTION 3.2 INITIAL INSPECTION 3.3 OPERATOR SAFETY INSTRUCTIONS CAUTION: When an instrument is brou 3.4 INSTALLATION Page Note: Switchin Page Page 3.5 OUTPUT CONNECTIONS Page 3.6 ACCEPTANCE TESTS Page Note: For meanin es" in the Reference Manual. of the hardware error numbers, refer to section 3.6.1 "Brief check" or to "Error Messa Page 4 GETTING FAMILIAR WITH THE POWER SUPPLY 4.1 INITIAL SETUP OF YOUR POWER SUPPLY Normal self test indications Self test errors Note: The address aa is the actual GPIB device address (default = 28). Note: The SELECT function is applicable only for multiple output models. 4.2 FRONT PANEL LAYOUT . 4 - 4 Users Manual + Gettin Familair with the Power Supply 4 - 5 1) The CALIBRATION mode is entered when you turn on the power supply while pressin the AUX key. 2) To unlock the keyboard, press the ENTER key for approximately 5 seconds. Note: The output channel indication is displayed only for multiple output channel models. 4.3 OUTPUT CHANNEL CONNECTIONS 4.4 GETTING STARTED le output model the number n will not be displayed. Page Note: The diameter of the jumper wire must be lar e enou h to carry the maximum short-circuit current. Page Page 5 USING YOUR PROGRAMMABLE POWER SUPPLY 5.1 INTRODUCTION 5.2 LOCAL OPERATION = applies to multiple output models only. Note: 5.3 REMOTE OPERATION 5.4 OPERATING FEATURES Page CAUTION: Only output channels with equivalent volta e and current ratin ed. s may be connected in series or in parallel to prevent that the channel with the lowest ratin s will be dama 5.5 HOW TO USE THE OPERATING FEATURES PM2811/12/13 ure 5.5.1 Output Channel Characteristics PM2831/32 ure 5.5.2 Output channel characteristics ure 5.5.3 Current sink characteristics . any chan ure 5.5.4 Volta e drop due to Wire Resistance R mode: Remote sensin ure 5.5.6 Connection of a Load in the Remote Sense Mode mode: ure 5.5.5 Connection of a Load in the Local Sense Mode Page ure 5.5.7 Power Output Crossover Point Page Page Page Local control (in CV or CC mode): Remote control (in CV or CC mode): Page Note: To remember which locations have been pro rammed and which have not, keep a record (such as the followin ) of which locations have been used. Local control (store/recall): Remote control (store/recall): Manual step function: Remark: When the next step is executed, the next volta e and current settin ): Page Remote control (automatic steppin ): External step functions Note: LOW = 0 to 0.8V and HIGH = 2 to 5V Tri gg er bus control: nored. Note: STEP pulses, received while the READY line is low, will be i 5.6 ADVANCED USE Note: For the PM2812 and PM2813 you can face a number of restrictions when connectin output channels in parallel to a load. Please read Appendix D to (outputs in parallel): with Two Outputs in Parallel CAUTION: To prevent noise pickup, twist the sense wires and shield them from the environment. ure 5.6.1 Local Sensin Page Page Page Page DT+ DT Remote sensin (loads in parallel): CAUTION: To prevent noise pickup, twist the sense wires and shield them from the environment. ure 5.6.6 Remote Sensin withTwo Loads in Parallel APPENDIX A ACCESSORIES A.1 Supplied with the instrument A.2 Optional Page APPENDIX B SCPI CONFORMANCE INFORMATION Page Page B.3 SCPI approved B.4 SCPI syntax and style Page APPENDIX C ABBREVIATIONS, SYMBOLS & TERMS C.1 Abbreviations Page Page Page C.2 Glossary of symbols C.3 Glossary of terms Page Page APPENDIX D APPLICATION FOR PM2812 AND PM2813 e mode. ure D.2 Channels connected in parallel to a load. Both channels are in Constant Volta e mode. Note: Coupled Protection is possible only for the channels in the same Power Supply. Try to prevent that the down pro Case 1: Constant Current Case 2: Constant Volta e, Output Current from a fixed minimum value to the maximum Case 3: Constant Volta e, Output Current from 0A to the maximum Page INDEX A C D E F G I L M N O P R S T V W