Amrel PPS-1326 Manual
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Amrel PPS-1326 Manual

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ONE:
INTRODUCTION
Congratulations! You have just purchased one of the most advanced professional Programmable Power Supplies
available. The innovative ergonomic design and overall high quality will provide years of reliable operation.
Therefore, it is very important to completely familiarize yourself with the unit before attempting use. Please read
this manual carefully, paying particular attention to the Warning and Caution sections.
At this time, please fill out the warranty card with all the applicable information and return to American
Reliance. The completed warranty card will ensure the benefits of a three-year warranty. We at American
Reliance, thank you for your selection of one of our products and welcome you to the family of American Reliance
product owners. Remember that, at American Reliance service does not end upon your purchase, it is just
beginning. If you have any questions, please do not hesitate to call our toll-free technical support line at (800) 654-
9838.
1.1
DESCRIPTION
The Programmable Power Supply Series from American Reliance Inc. offers a complete solution to power supply
system requirements. These models are indispensable instruments in assisting in the development and testing of
new products, as well as being standard instruments for automatic test systems. The wide range of output selection
combined with excellent load/line regulation creates a vital instrument in your lab environment.
The PPS Series come standard with a GPIB interface and a three-year warranty. Plus, all units come standard with
output voltage and current programming, overvoltage and overcurrent protection, remote sense, reverse polarity
protection and output enable/disable. All models of the programmable power supply series are able to be calibrated
either in local or remote mode.
1.2
INSPECTION
When you unpack your new programmable power supply from its original packaging, carefully check each item for
damage that may have occurred during shipment. If anything is damaged or missing, please contact American
Reliance at (818) 303-6688 for immediate service.
1.3
INCLUDED ITEMS
Programmable Power Supply
Operation Manual
Power Cord
1.4
CAUTIONS AND WARNINGS
1. The input power requirements for the programmable power supplies are 115/230 VAC ±10% or 240VAC
±10%, 50/60 Hz.
2. Before begin to operate the power supply, set the correct voltage 115 or 230(240) VAC setting equal to the
applied voltage, otherwise damage will result to the power supply.
3. Do not use solvents or aromatic hydrocarbons to clean the module as they may damage the finish. If cleaning
is necessary, use only a mild solution of soap and warm water. Be careful not to allow water to enter the unit.
Please be sure to always disconnect the power cord before cleaning.
4. Use only specified fuses. Do not use a substitute fuse which is of a different size and rating. Otherwise, damage
may result to the unit.
5. Do not substitute or modify any internal circuits.
1

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  • Page 1 ONE: INTRODUCTION Congratulations! You have just purchased one of the most advanced professional Programmable Power Supplies available. The innovative ergonomic design and overall high quality will provide years of reliable operation. Therefore, it is very important to completely familiarize yourself with the unit before attempting use. Please read this manual carefully, paying particular attention to the Warning and Caution sections.

  • Page 2: Location And Cooling

    6. Exercise extreme caution when cables are over four feet in length. 7. Turns off AC power (or disable unit) before disconnecting load or floating voltages. 8. Operates the power supply with properly rated wire sizes. LOCATION AND COOLING 1. The proper operating temperature for the power supply are from 0°C to 50°C. The unit ventilates by drawing air through the sides and exhausting it through the rear.

  • Page 3: Unit Familiarization

    30.00V 0.000A High OUTPUT é é BEEP SELECT ç ç ê ê è è UTILITY ENTER Figure A. Front Panel of PPS-1326 30.00V 0.000A OUTPUT é é BEEP SELECT ç ç ê ê è è UTILITY ENTER Figure B. Front Panel of PPS-1603/10710...
  • Page 4 PROGRAMABLE DC POWER SUPPLY FUNCTION/DATA ENTRY 1.002V 0.000A é é BEEP SELECT ç ç ê ê è è UTILITY ENTER Figure C. Front Panel of PPS-1322/1302A PROGRAMABLE DC POWER SUPPLY FUNCTION/DATA ENTRY OCP1 1.002V*0.000A OCP2 OVP1 0.999V 0.000A OVP2 é é BEEP SELECT ç...

  • Page 5: Front Panel Keys

    Ground output terminal. 5. Positive Terminal Positive output terminal. 6. -S Terminal Negative remote sense (Applicable only for the PPS-1326/1603/10710) 7. +S Terminal Positive remote sense (Applicable only for the PPS-1326/1603/10710) 8. VSET (7) Output control key used to display or alter the present voltage setting. Numeric entry key for number seven.
  • Page 6 18. BEEP (3) Activates the audible indicator on or off. Numeric entry key for number three. ç (0) This key moves the cursor one digit left until it comes to the desired digit to be varied. Numeric entry key for "0". ê...
  • Page 7 OUTPUT OUTPUT channel 1 channel 2 Figure E -2. Rear Panel of PPS-2322 Figure E -3. Rear Panel of PPS-1322/1302A/1326...

  • Page 8: Rear Panel

    2.1.2 REAR PANEL 24. Ventilation ports - Exhausts warm air from the unit. 25. GPIB Interface - 24 pin parallel GPIB interface connector. - Selects voltage of either 115VAC or 230(240)VAC, -10% ∼ +10%, 50/60Hz. 26. Voltage Selector 27. Fuseholder - Fuseholder for AC line.
  • Page 9 Figure F -2. LCD of PPS-1322/1302A/1603/10710 30.00V 0.000A High Figure F -3. LCD of PPS-1326 <NOTE:> The LCD displays real time output Voltage/Current & mode status.There are no status indicators for CV mode. These messages are viewed in either local or remote mode.
  • Page 10 OUTPUT TERMINALS AND WIRES All models have terminal blocks on the rear panel which include positive and negative outputs, positive and negative remote sense outputs, and earth ground. <NOTE:> The power supply is set at the factory for local sense operation (i.e. the +S and -S terminals are strapped to the "+"...

  • Page 11: Operating Ranges

    I s the front panel current setting. The followings are the operating quadrants (current -vs- voltage) of the power supplies. Vmax V1 (High) V2 (Low) Imax I1 (High) I2 (Low) PPS-1322/1302A/2322/1603/10710 PPS-1326 Figure G. Operating Quadrants...

  • Page 12: Remote Sense

    REMOTE SENSE When the supply is locally strapped for local sensing (normal operation), an unavoidable voltage drop is incurred in the load leads and this adds to its voltage regulation. By connecting the supply for voltage remote sensing, as shown in figure G, voltage is sensed at the load rather than at the output terminals. This allows the supply to automatically compensate for voltage drop in the load leads and improve regulation.
  • Page 13 STABILITY: When the supply is connected for remote sensing, it is possible for the impedance of the load wires and the capacitance of the load to form a filter, which will become part of the supply's CV feedback loop. The extra phase shift created by this filter can degrade the supply's stability and can result in poor transient response performance.
  • Page 14 2. For models with maximum output voltage below 60 Volts, Capacitance should not exceed 3000uF. <NOTE:> If load capacitance approaches these limits, it is recommended to not intentionally activate the OVP circuit and discharge the capacitance through the SCR crowbar as part of standard testing procedure.
  • Page 15 As an example of this operation, let's assume in figure H. that output channel two operates in CC mode and output channel one operates in CV mode. Perform the following steps: 1. Set output channel two to the maximum output voltage of desired range. 2.
  • Page 16 SERIES CONNECTION OPERATION <NOTE:> Power supplies equipped with SCR crowbars should not be used in series or parallel with each other unless a master-slave interconnection is employed and their crowbars interlock. Greater output voltage capability can be obtained by connecting outputs in series. A note of caution, since current is the same in each element of a series circuit, both outputs need identical rated currents.
  • Page 17 3.6.3 REMOTE SENSE CONFIGURATION (Series Connection Mode) The following figure K illustrates the configuration for Remote Sensing in Series Operation. OUTPUT OUTPUT channel 1 channel 2 Figure K. Series Configuration with Remote Sense...
  • Page 18 External Analog Programming (PPS-1603/10710) The voltage and current outputs of the PPS 1603/10710 can be programmed by an external analog voltage. The outputs are linearly proportioned to an external input voltage from 0 to 10 volts. The external analog programming mode is activated by setting these parameters via the front panel or GPIB bus, VSET to 0V, ISET to a proper value for CV operation, or setting ISET to 0A and VSET to a proper value for CC operation.

  • Page 19: General Information

    The PPS series power supply models and their operations are essentially identical. However, two of the supplies provide more functions (i.e. PPS-2322 has dual outputs and PPS-1326 has two output operating ranges) which may slightly alter or add to programming procedures. Therefore, please refer to the appropiate sections for these operations.

  • Page 20: Setting Current

    VSET description: For all models, VSET can be altered by pressing " " or " " key instead of "VSET" and entry keys. When the power supply is in the CV mode, pressing " " key will increase output voltage per step. The increment step is ç...
  • Page 21 SETTING THE PROTECTION MODES The power supplies have overvoltage protection (OVP) and overcurrent protection (OCP) features to guard against abnormal operating conditions. When either of these two functions are activated, the unit disables the output. The LCD annunciator will indicate the condition and an audible signal will sound. 4.5.1 SETTING THE OVERVOLTAGE THRESHOLD To locally program the threshold voltage press "OVSET", enter the value and press "ENTER".

  • Page 22: Audible Signal

    OPERATING PROCEDURES}. The LCD displays "LO" when the low range is active or "HI", when the high range is active. All other operations on the PPS-1326 are identical to other models. For more information on operating range characteristics, please refer to section 3.2.
  • Page 23 FIVE: REMOTE OPERATION The programmable Power Supply Series from American Reliance are compatible with ANSI/IEEE 488.1. This is the "Standard Digital Interface for Programmable Instrumentation". This standard provides a means for an electrical and mechanical system to interconnect electronic measurement devices. Several key specifications of IEEE 488.1 are: •...
  • Page 24 GPIB OPERATION The GPIB (General Purpose Interface Bus) operation allows for constant talk and listen between systems. The PPS series are able to act as both talkers and listeners. The computer is able to act as a talker, listener, and controller. LISTENER: A device capable of accepting data over an interface.
  • Page 25 GPIB DEVICE COMMANDS LIST: PPS-1322/1302A PPS-1326 PPS-1603/10710 PPS-2322 Type Input/Output Command CALCHNL [0,1] [0,1] [0,1] [0,3] Input [0,1] [0,1] [0,1] [0,1] Input [0,1] [0,1] [0,1] Input OUT1 [0,1] Input OUT2 [0,1] Input RANGE [0,1] Input TRACK [0,1] Input [0,1] [0,1]...
  • Page 26 OUT2 ON NIBBLE 3 NIBBLE 4 NOTE: 1. Byte 0 is available for models PPS-1322/1302A, PPS-1326, PPS-1603/10710 and PPS-2322. However, byte 1 is only applicable for PPS-2322. 2. The most significant bit of byte 0 or byte 1 is always 0.

  • Page 27: Programming The Power Supply

    An explanation of these bytes/bits is as follows: b6 (Byte 0) - Signifies the low range (0) or high range (1) applicable to the PPS-1326. b6 (Byte 1) - Signifies whether or not the PPS-2322 are in tracking mode. b5 - Signifies which mode the power supply is operating in, constant current or constant voltage.

  • Page 28: Output On/Off

    INITIAL DEFAULT SETTINGS OF PPS: COMMAND PPS-1322/1302A PPS-1326 PPS-1603/10710 PPS-2322 OUT1 OUT2 VSET ISET 0.0140 0.0140/0.0140 0.0140 OVSET maximum maximum maximum VSET1 VSET2 ISET1 0.0140 ISET2 0.0140 OVSET1 maximum OVSET2 maximum ADDRESS 5.5.1 OUTPUT ON/OFF All power supplies have their outputs off upon powering up. The command "OUT" is to enable/disable the outputs.

  • Page 29: Current Programming

    Once again, the power supply should be addressed to talk and the results displayed (i.e. shown on CRT, printed, or saved). The PPS-2322 have two outputs, please refer to the programming syntax commands for proper nomenclature of commands. 5.5.3 OVERVOLTAGE PROGRAMMING (OVSET) In order to protect loads against excessive voltages, an overvoltage protection circuit (SCR crowbar) has been added.

  • Page 30: Overcurrent Protection (Ocp)

    RANGE and TRACK. Both of these commands may be controlled by a true "1" or false "0" command. The "RANGE" command is only applicable to the PPS-1326, "TRACK" command is only applicable to the PPS-2322. The ensuing examples will assist in clarifying the two commands.
  • Page 31 [default]), and the power supply address is 12 as is the case for all models. Then the communication path for this combination is 512. COMMON COMMANDS: There is a wide variety of commands available to program the power supply. However, the commands which pertain to voltage and current are of most use.
  • Page 32 OBTAINING DATA: The steps involved in obtaining data from the power supply follow a similar formats as in sending data. However, additional commands (Enter and Print) are necessary to view the data. For example, to query the programmed voltage of the previous example, send: OUTPUT 512;...

  • Page 33: Calibration Configuration

    SIX: CALIBRATION INTRODUCTION This addendum describes calibration procedures for the AMREL Programmable DC Power Supply. The supply is calibrated either through local or remote control. The following information provides calibration procedures in local mode. NO hardware adjustment is necessary since all calibration is accomplished by software. The software sends calibration constants to the supply via the front panel keys.

  • Page 34: Voltage Calibration

    PRECISION SHUNT RESISTOR Figure N. Current Calibration Configuration LOCAL CALIBRATION The following steps describe the calibration procedure of the supply via front panel keypads in local mode. CAUTION: In these procedures, voltages and currents may exceed full scale value. Take all necessary precautions.
  • Page 35 For PPS-2322, Ch.1 and Ch.2 can only be calibrated in sequence (applies only in local mode). The PPS-1326 has two ranges and the voltage readback resolution for both ranges is identical. However, the current ranges are not identical and therefore need to be calibrated seperately.

  • Page 36: User Maintenance/Service

    If the fuse is found to be defective, replace it with a replacement fuse as specified in the following table: Models Fuse Rating PPS-1322/1302A 2 amp (115VAC) or 1 amp (230VAC), 250V PPS-1326 4 amp (115VAC) or 2 amp (230VAC), 250V PPS-2322 4 amp (115VAC) or 2 amp (230VAC), 250V PPS-1603/10710 5 amp (115VAC) or 2.5 amp (230VAC), 250V...
  • Page 37 WARRANTY INFORMATION THREE-YEAR LIMITED WARRANTY American Reliance warrants to the original user or purchaser that your unit is free from any defects in material or workmanship for a period of three years from the date of purchase. If any defect is discovered within the warranty period, American Reliance will repair or replace the unit, subject to verification of the defect or malfunction, upon delivery or prepaid shipment to American Reliance.

  • Page 38: Non-Warranty Service

    NON-WARRANTY SERVICE Any American Reliance out-of-warranty instrument that is thought to be defective, but is repairable, may be sent in for non-warranty service. Please contact our service department at (818) 303-6688 for current repair charges. The instrument should be returned to American Reliance, please follow the directions under the heading "Shipping Instructions"...

  • Page 39: Appendix A: Specifications

    Remote sense operation is possible with up to 0.5V drop for positive and negative output load leads. Add 0.2mV ( PPS-1322, PPS-1302A, & PPS-2322 ) ,0.7mV ( PPS-1326 ) & 1.5mV ( PPS-10710 ), & 0.5mV ( PPS-1603 ) to voltage load effect specification for each 1V drop in the negative output load lead.

  • Page 40: Appendix B: Command Summaries

    APPENDIX A: SPECIFICATIONS (continued) MODEL PPS-1322 PPS-1302A PPS-2322 PPS-1326 PPS-10710 PPS-1603 Maximum output change for a line voltage change within rating. SOURCE EFFECT Voltage Current PARD (PERIODIC AND RANDOM DEVIATION AND NOISE) RMS/PK-PK (20Hz - 20MHz) with output ungrounded. Voltage...
  • Page 41 (PPS-2322 series only) OVSET2 Set the overvoltage protection value for channel two (PPS-2322 series only) RANGE Sets the low or high range of the PPS-1326 series. TRACK Sets the tracking mode of the PPS-2322 series. Sets the fullscale voltage for calibration. VOFF Sets the offset voltage for calibration.
  • Page 42 APPENDIX B: COMMAND SUMMARIES CONTINUED (QUERIES) COMMAND DEFINITION ERROR? Queries for command or numeric errors IOUT? Queries the current output. IOUT1? Qreries the current output of channel one (PPS-2322 series only). IOUT2? Qreries the current output of channel two (PPS-2322 series only). ISET? Queries the set current output.

  • Page 43: Appendix C: Query Messages

    APPENDIX C: QUERY MESSAGES ERROR CODE MESSAGE DEFINTION ERROR 0 No Errors ERROR 1 Command String Error ERROR 2 Numeric String Out of Range ERROR 3 Numeric String Over Length ERROR 4 Command Sequence Error ERROR 5 ERROR 6...

  • Page 44: Appendix D: Calibration Program Example

    APPENDIX D: CALIBRATION PROGRAM EXAMPLE The following is a software calibration program written in BASICA for a one channel PPS. The equipment necessary to calibrate the unit included a Hewlett Packard HP-3458A digital multimeter (GPIB interface) and a controller card from National Instruments (AT-GPIB). The shunt resistor used for local calibration may be utilized in remote calibration.

This manual is also suitable for:

Pps-1603/10710Pps-1322/1302aPps-2322

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