Philips PM2811, PM2812, PM2813, PM2831, PM2832 ., any chan, ure 5.5.4 Volta, e drop due to Wire Resistance R

5 - 10 Users Manual

5.5.2 Local and remote sensin

g

All models have the ability to sense the output volta

g

e locally or remotely. The

wires between an output channel and the connected load have a resistance,

which causes a volta

g

e drop. If the volta

g

e drop is not acceptable, remote sensin

g

must be applied.

The formula to calculate the volta

g

e drop is Vdrop = Iload x Rlead:

•Vdrop =the total volta

g

e drop of both wires

•Iload =the current throu

g

h the load

•Rlead =the total resistance of both wires between the power supply and the

load

Fi

g

ures 5.5.5 and 5.5.6 show the difference between a local and remote

connection has been indicated.

CAUTION: To prevent shock or short-circuit you must set the power supply to the standby mode before makin

g

any chan

g

es in the output channel connections or you must disable the output channel (only possible for multiple output models).

All the models and their output channels have the same terminal block (see the

followin

g

dia

g

ram). This means that all output channels have the local or remote

sensin

g

feature. The load is supplied with power (volta

g

e and/or current) throu

g

h

the output terminals -V and + V. The readback of the output volta

g

e is done

throu

g

h the input terminals -S and + S.

+S

+V

V

S

R

12lead

R

2

1lead

Rload

ST5836

Fi

g

ure 5.5.4 Volta

g

e drop due to Wire Resistance R

lead

.

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