1. Manuals
  2. Brands
  3. Aetechron Manuals
  4. Amplifier
  5. 7114
  6. Operating manual

Aetechron 7114 Operating Manual

Precision industrial ac/dc amplifier
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
7114
Operator's Manual
Precision Industrial AC/DC Amplifier
574.295.9495 |
www.aetechron.com
2507 Warren Street, Elkhart, IN 46516

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 7114 and is the answer not in the manual?

Questions and answers

Related Manuals for Aetechron 7114

Summary of Contents for Aetechron 7114

  • Page 1 7114 Operator’s Manual Precision Industrial AC/DC Amplifier 574.295.9495 | www.aetechron.com 2507 Warren Street, Elkhart, IN 46516...
  • Page 2 United States and all taxes, duties, and other customs AE Techron, Inc. fees for such foreign shipments.) Customer Service Department 2507 Warren Street HOW TO OBTAIN WARRANTY SERVICE Elkhart, IN 46516 When you notify us of your need for warranty service, U.S.A. 574.295.9495 www.aetechron.com...

  • Page 3: Table Of Contents

    4.3  Connectors ..........................11 5  Advanced Configuration .......................13 5.1  Internal Jumpers and Settings.....................13 6  Applications ..........................16 6.1  RAIL V Settings for Increased Voltage or Current ...............16 6.2  Remote Status and Control using the DB-9 Connector............16 6.3 Controlled Current Operation ....................18 6.4  Using the 7114 as a Battery Simulator/Four-Quadrant Supply ...........22 6.5  Using the 7114 for Overvoltage Testing ................22 6.6  Using the 7114 for PSRR Measurements ................23 6.7  Using the 7114 for Amplfier CMRR Measurements .............26 6.8  Using the 7114 to Create Complex Waveforms ..............27 7  Maintenance ..........................28 7.1  Clean Filter and Grills ......................28...

  • Page 5: Introduction

    7114  OPERATOR’S MANUAL – SECTION 1 Figure 1.1 – 7114 Front and Back Panels 1 Introduction Features Congratulations on your purchase of a 7114  • 15A DC and capable of reproducing  precision industrial AC/DC amplifier. AE Techron’s 500 kHz ripple or < 4μs dropout/pulses. 7114 amplifier is a 400-VA, 4-quadrant, AC and  • User-variable DC offset: ±20V or ±45V. DC amplifier that provides exceptional versatil- • User-adjustable current limit: 25A to 1A. ity and value. Compact size, user configurability,  • Compact 1/2-rack width, 2U height;  DC-Max™ topology, and AE Techron toughness  weighs only 20 lbs.  makes the 7114 the ideal lab partner for automo- • Four-quadrant operation. tive conducted immunity testing, PSRR testing, or  • AC/DC coupled. any application where more voltage or current is  • AE Techron Tough: Protection from over- needed than is available from the signal source. temperature, over-current, over/under  Compact Power supply voltages; will drive capacitive  and inductive loads. The 7114 weighs just 20 pounds and fits into one- half of a 2U rack space, but still can output up to  400 watts RMS continuous. This makes the 7114 a  It can also produce a DC output without an input ...

  • Page 6: Amplifier Unpacking And Installation

    7114 OPERATOR’S MANUAL – SECTION 2 2 Amplifier Unpacking and Installation The 7114 amplifier is a precision instrument that  Along with any additional accessories purchased  can be dangerous if not handled properly. Lethal  by the customer, all 7114 models ship with the fol- voltages are present in both the AC input supply  lowing: and the output of the amplifier. For this reason,  • 7114 Amplifier safety should be your primary concern when you  • Power Cord setup and operate this product. • 7114 Operator’s Manual (on USB drive) and  7114 Quick Start sheet 2.1 Safety First 2.3 Installation Throughout this manual special emphasis is  placed on good safety practices. The following  The 7114 amplifier is packaged in a rugged pow- graphics are used to highlight certain topics that  der-coated steel chassis. This chassis is 2U (rack  require extra precaution. units) tall and has a width one-half of a standard  EIA (Electronic Industries Association) rack. It  can be rack mounted using a custom rack shelf/ DANGER adapter (not supplied). This adapter can be used ...

  • Page 7: Connections And Startup

    7114  OPERATOR’S MANUAL – SECTION 3 3 Connections and Startup This section details the wiring and startup proce- dures for a 7114 amplifier operating in Controlled- Voltage mode (factory default). Before connecting  the unit, make sure the AC power cord is un- plugged.  3.1 Controlled Current Operation IMPORTANT: If your application requires Con- trolled Current operation, the 7114 first should be  wired and tested in Controlled-Voltage mode to  Figure 3.1 – Connecting the Load verify that the input signal and the amplified output  are operating correctly. Once proper operation is  3.3 Connecting the Input Signal confirmed, refer to the Applications section of this  Two front-panel input connectors are available  manual for instructions on configuring and operat- on the product’s front panel: an unbalanced Input  ing your product in Controlled- BNC jack and a balanced Input “WECO” terminal  Current mode. block connector. Connection should be made to  the unbalanced or balanced input connector as  WARNING shown in Figure 3.2. Use cables that are high ...

  • Page 8: Connecting The Ac Supply

    7114 OPERATOR’S MANUAL – SECTION 3 The product also can receive input signal through  the back-panel DB-9 connector. In addition to  signal input, this connector can be used for remote  control and monitoring applications. Please refer to  the Applications section of this manual for infor- mation on using the DB-9 connector. The 7114 can receive input signal simultaneously  from all three input connectors, allowing for the  creation of complex input waveforms from up to  three separate input devices. Please refer to the  Figure 3.3 – Closeup of AC Mains Outlet Applications section of this manual for informa- tion on complex waveform creation. 3.5 Start-up Procedures 1. If an input signal source is required, con- 3.4 Connecting the AC Supply nect the signal source and turn down the  The power cord connects to a standard 15A 3-pin  input signal level. IEC-type male connector on the back panel (see  2. If a DC supply is required, push the Offset  Figure 3.3). Make sure the power switch on the  switch to enable the Variable offset, then  front panel is switched to the OFF (O) position.  use the Offset variable control knob to  Make sure the power cord is inserted and seated  select the desired DC supply. fully into the IEC connector by moving it slightly ...

  • Page 9: Operation

    7114  OPERATOR’S MANUAL – SECTION 4 Figure 4.1 – Front Panel Controls, Indicators and Connectors 4 Operation 4.1 Front-Panel Controls testing to protect delicate devices from possible  This section provides an overview of Front-Panel  over-current conditions. controls found on the 7114  amplifier. See Figure 4.1 for control locations.  COUPLING The COUPLING button-switch toggles the selec- 4.1.1 POWER Switch tion of DC or AC coupling. When the switch is in  The lighted rocker POWER switch controls the AC  the UP position, the unit can receive and amplify  mains power to the unit. Switch to the ON position  both DC and AC signal. When the switch is in the  (|) to turn the unit on. The switch’s internal LED will  DOWN position, a low-pass filter will prevent the  light. Switch to the OFF position (O) to turn the unit  transmission of DC signal (-3dB at 5.5 Hz). off. See Figure 4.1. OFFSET 4.1.2 Push Button Switches and Variable Control Knobs The OFFSET button-switch toggles the selection  of DC offset to none or variable. When the switch  The 7114 uses push button switches to toggle ...

  • Page 10: Front-Panel Indicators

    7114 OPERATOR’S MANUAL – SECTION 4 When an over-temperature condition occurs, the  with the power supply rails in a series configura- unit’s fans will continuously operate at high speed  tion for high-voltage output. When this switch is in  until the over-temperature condition is resolved.  the DOWN position, the unit will operate with the  Turn down your input signal and allow the fans  power supply rails in a parallel configuration for  high-current output. This will result in a maximum  to operate at high speed until they automatically  switch to low-speed operation, indicating the unit  voltage potential of 90V (high-rail) or 45V (low- has cooled enough to resume operation. Then  rail). For more information on how to set the RAIL  V switch for increased voltage or current, see the  cycle the power switch to return the unit to normal  operation. If the unit does not return to normal  Applications section. operation, it may require servicing. Please see the  NOTE: If the RAIL V switch setting is changed  Troubleshooting section for more information. from high to low rails while the unit is operating,  the output signal may clip.  NOTE: If the unit’s transformers have overheated,  the fans will typically need to operate at high  GAIN speed for at least 10-15 minutes in order to resolve  The GAIN button-switch toggles the selection of  the over-temperature condition. fixed or variable gain. When the switch is in the UP  position, a fixed gain of 10X is enabled. When the  Over-voltage Condition switch is in the DOWN position, the gain can be  The FAULT indicator may light when the AC mains  varied between 0-10X using the variable control ...

  • Page 11: Connectors

    7114  OPERATOR’S MANUAL – SECTION 4 Figure 4.2 – Back Panel Connectors If the unit does not return to normal operation after  correcting or ruling out over-temperature, over- voltage and overload conditions, it may require  servicing. Please see the Troubleshooting sec- tion for more information. Connectors This section provides an overview of the connec- Figure 4.3 – BNC Connector Wiring tors found on the 7114 amplifier. Please refer to  Figures 4.1 and 4.2 for visual locations. 4.3.1 Input Connectors The 7114 provides two front-panel and one back- panel connector for signal input. The front-panel  BNC connector provides unbalanced input, while  the front-panel WECO and the back-panel DB-9  connectors provide balanced input.  Figure 4.4 – WECO Connector Wiring Signal input can occur from one, two, or all three  connectors simultaneously. In addition, a DC  Balanced WECO Connector offset signal can be added, allowing for the con- The balanced WECO connector is located on the  trol and amplification of a wide range of complex  unit’s front panel to the right of the Power switch. It  waveforms. See the Applications section of this  provides balanced signal input. See Figure 4.4 for manual for more information.
  • Page 12 7114 OPERATOR’S MANUAL – SECTION 4 tions. See the Applications section of this manual  for more information. 4.3.2 Output Connectors The 7114 provides a pair of 5-way binding post  connectors for signal output. Connection can be  made using banana plug connectors, pin connec- tors, lug terminals, alligator clips, or bare wire. The  output connectors accept up to 12 AWG wire. See  Figure 4.6 for connector output wiring. When building output wiring cables, keep these  tips in mind: • For best performance, especially for high- Figure 4.5 – DB-9 Connector Wiring frequency applications, keep output wire cables  as short as possbile.  • To minimize inductance, twist the + and - wire  leads together. • For high current applications, make sure to use  a heavy-gauge wire to avoid  excessive voltage  drops. Figure 4.6 – Output Connector Wiring Information subject to change 97-8004339_05-08-18...

  • Page 13: Advanced Configuration

    7114  OPERATOR’S MANUAL – SECTION 5 5 Advanced Configuration The 7114 was designed to offer great versatility in  operation. You can choose from several advanced  field-configurable options, including: • Set the Current Limit to apply to AC waveforms  only instead of the default which applies the  Current Limit to both AC and DC. • Change the maximum DC Offset adjustment  from ±20V to ±45V for finer control of the vari- able DC Offset setting. Figure 5.1 – Cover Screw Locations • Change the mode of operation from Controlled- 1. Remove power from the unit and disconnect  Voltage to Controlled-Current to operate the  any load from the outputs. Wait a minimum of  unit as a voltage-controlled current source. three minutes to allow the unit’s capacitors to  • Configure the amplifier to signal a Fault condi- discharge. tion when an overload condition occurs. 2. Use a #1 Phillips screwdriver to remove the  5.1 Internal Jumpers and Settings twelve (12) Phillips-head screws, as shown in  Figure 5.1. The 7114 contains two “daughter card” circuit  boards; each board connects to the main board ...
  • Page 14 7114 OPERATOR’S MANUAL – SECTION 5 Figure 5.3 – 7100 Controller Board Jumper Locations Controller Board Removal Procedure 1. Locate the 7100 Controller card as shown in  Figure 5.2. 2. Remove the two jack nuts from the DB9 Con- trol Port connector on the back panel. 3. Firmly pull straight up on the card to disconnect  it from the two 20-pin connectors. Figure 5.4 – Current Limit Jumper Settings  4. To replace the board, position the 20-pin con- Controlled Mode nectors located on the 7100 Controller card  By default, the 7114 operates in Controlled-Voltage  over the matching 20-pin connectors located  mode. In Controlled-Voltage mode, the unit’s  on the 7100-series main board. Push gently  output voltage will be controlled by its input volt- but firmly to seat the card into place in the con- age signal. The 7114 can be configured to operate  nectors. 5. Replace the jack nuts on the DB9 Control Port  CAUTION connector. 5.1.2 Jumper Settings on the 7100 Controller Board In Controlled-Current Mode, the load is part of the amplifica-...
  • Page 15 7114  OPERATOR’S MANUAL – SECTION 5 in Controlled-Current mode. In Controlled-Current To change the compensation network, locate jump- er J11. When pins 1 and 2 are shunted (factory  mode, the unit’s output current will be controlled by  its input voltage signal. default), network CC1 is enabled (75k ohm and  47 nF). To select network CC2, place the shunt on  IMPORTANT: Controlled-Current operation re- jumper J11 across pins 2 and 3. quires the use of a compensation network, and the  7114’s default compensation network may not be  Remove the shunt from jumper J3 to disable both  suitable for your application. For more information  CC1 and CC2 networks. A small feedback capaci- on Controlled-Current operation, including how to  tor remains in the circuit to provide stability when  determine and configure a custom compensation  operating into an 8-ohm load. For more information network, see the Applications section.

  • Page 16: Applications

    7114 OPERATOR’S MANUAL – SECTION 6 6 Applications 6.1 RAIL V Settings for Increased Voltage or Current The 7114 features a bi-level power supply that  contains two secondary transformers. The second- ary rails of each transformer can be placed in a  series or parallel configuration, as shown in Figure 6.1, providing the option for operating in High  Voltage mode (increased voltage) or High Current  mode (increased current).  As shipped from the factory, the 7114 is set to oper- ate with the transformer rails configured in series,  providing a voltage potential of 90V. This configura- tion works well for high-voltage applications.  For high-current applications requiring a lower  voltage potential, press the RAIL V switch to place  the transformer rails in parallel. This will result in a  maximum voltage potential of 45V. Refer to the Specifications section of this manual  for maximum voltage and current capabilities when  Figure 6.1 – RAIL V Switch Settings Comparison running in High Voltage or High Current modes.  6.2 Remote Status and Control using the DB-9 Connector The procedures outlined in this section assume ...
  • Page 17 7114  OPERATOR’S MANUAL – SECTION 6 6.2.1 Balanced Signal Input You can use the DB-9 Control Port located on the  back panel of the unit as an additional balanced  signal input. This input can be used simultaneously  with the front panel unbalanced BNC and/or bal- anced WECO inputs.  Signal Input Purpose: Use the DB-9 Control Port as an alter- nate or additional signal input.  Method: Connect to your signal input device using  Pin 1 (signal +), Pin 2 (signal –) and Pin 3 (ground) to a DB-9 connector. See Figure 6.3. Signal Type: AC Figure 6.3 – Balanced Input Wiring  Level when Asserted: 10 V maximum on DB-9 Control Port Level when Deasserted: 0 V 6.2.2 Emergency Stop/Fast Mute/Blanking Purpose: Use switch or optocoupler to remotely  mute the unit.

  • Page 18: Controlled Current Operation

    7114 OPERATOR’S MANUAL – SECTION 6 6.2.4 Remote Current Monitor Using the DB-9 Control Port located on the back  panel, you can remotely monitor the current output of the unit. Remote Monitoring of Current Output Purpose: Use a voltage meter to monitor output  current. Method: Connect a voltage meter to monitor the  output current being produced by the unit. Con- nect across PIN 8 (I MON+) and PIN 9 (Analog  Ground). See Figure 6.6. Signal Type: AC & DC Level: 5A/V Figure 6.6 – Remote Current Monitor  Application Wiring on DB-9 Control Port 6.3 Controlled Current Operation The procedures outlined in this section assume ...
  • Page 19 7114  OPERATOR’S MANUAL – SECTION 6 6.3.2 Safety and Operation Considerations for resistive values of the load will determine the  Controlled Current Operation required compensation values. While the factory- default compensation setting will be sufficient  When an AE Techron 7114 amplifier is configured  for some applications, the compensation setting  as a Controlled-Current source, care needs to  may also be adjusted in the field. The following  be exercised in its operation. Any voltage con- section describes methods for determining and  trolled current source should never be turned setting proper compensation when operating in  on without a load, (with some impedance, real Controlled-Current mode. or effective) connected to its output terminals.
  • Page 20 7114 OPERATOR’S MANUAL – SECTION 6 STEP 3: Determine if Default or Custom Compensation is Required. If your load inductance is between 200 microHen- If your load inductance falls outside of the mid- ries and 1 milliHenry, and your load resistance  range, or if your load resistance is greater than  is less than 5 ohms, then you can likely use the  5 ohms, then you must calculate your required  default compensation provided by the amplifier’s  compensation. If, after calculating your required  factory-installed RC network. This compensation  compensation, you determine that the default com- network is enabled by default when the Current  pensation will be insufficient for your load, then you  setting is selected on the Controlled Mode jumper. will need to calculate and then enable and install a  custom RC network. See STEP 5 below. STEP 4: (Optional) Verify Suitability of Default Compensation (CC1) If desired, the following values of the components  Compensation Resistor: 75k ohms contained in the default RC network can be used ...
  • Page 21 7114  OPERATOR’S MANUAL – SECTION 6 Figure 6.9 – Control Mode Jumper, Compensation Network Jumper and Custom Compensation Locations STEP 7: Optimizing the Compensation Values. Remember the load you are connecting is a justment to the resistor component of the Compen- part of the system and the unit should not be sation circuit is probably required.  turned on without the load being connected. If the output current waveform is ringing, the circuit  After installing the components, check to ensure  is underdamped: You have too much compensa- that the Controlled Mode jumper is set to Current  tion and should lower the resistance (see Figure mode, then power up the unit without signal input.

  • Page 22: Using The 7114 As A Battery Simulator/Four-Quadrant Supply

    When making adjustments: circuit because this can decrease stability and  Resistor: Increase or decrease resistance values  may increase inductance. in increments of +/- 10%.  • The parallel capacitor in the RC network serves  to increase stability but can be removed, if it is  Capacitor: Incrementally decrease capacitor val- not required for system stability. If the parallel  ues by a factor of 2 or 3. capacitor is used, it will usually decrease the  value of resistance needed.  Using the 7114 as a Battery signal based on your output requirements ad- Simulator/Four-Quadrant Supply justed for the amplifier gain (10X). Unlike conventional power supplies, a 7114 ampli- Using the 7114 for Overvoltage fier can output positive or negative voltage and  Testing can sink or source current. This makes it great for  The 7114 can also produce a DC supply inde- use as a four-quadrant power supply or a battery  pendent of a signal generator, making it useful  simulator.  for high-speed over-voltage testing. The 7114’s ...

  • Page 23: Using The 7114 For Psrr Measurements

    6.6.1 LDO PSRR Measurement Using A Network Analyzer ments adjusted for the amplifier gain (10X),  minus the DC supply. For example, a 3V DC  You will need a network analyzer, an AE Techron  input signal sent to the 7114 with a 12V supply  7114 amplifier and the device under test (DUT). setting would result in a 42V output sent to the  Test Setup DUT. 1. Connect from the network analyzer source to  Using the 7114 for PSRR the signal input of the 7114. Measurements 2. Connect from the 7114 outputs to the LDO  supply input. A 7114 can be useful for making Power Supply  3. Set the 7114’s Coupling switch to AC. Rejection Ratio (PSRR) measurements for devices  4. Set the 7114’s Offset switch to Variable, and  like low dropout regulators (LDOs) and power  then adjust the Offset variable control knob  amplifiers, especially when the device under test  until the output DC voltage reaches the desired ...
  • Page 24 6.6.2 LDO PSRR Measurement Using 4. Set the function generator’s output to a level  An Oscilloscope 1/10 of the desired output at the LDO supply  input. You will need a function generator or arbitrary  5. Set the function generator’s frequency to the  waveform generator, an AE Techron 7114 amplifier,  frequency to be tested (i.e., 1 kHz). an oscillioscope, and the device under test (DUT). 6. Set the 7114’s Coupling switch to AC. Test Setup (Refer to Figure 6.17) 7. Set the 7114’s Offset switch to Variable, and  1. Connect from the function generator or AWG to  then adjust the Offset variable control knob  the signal input of the 7114. until the output DC voltage reaches the desired  2. Connect from the 7114 outputs to the LDO  level (i.e., 3.3V).  supply input. 8. Set the 7114’s Gain switch to Fixed. Figure 6.17 – LDO PSRR Measurement, Testing Setup using Oscilloscope...
  • Page 25 7114  OPERATOR’S MANUAL – SECTION 6 9. Use the oscilloscope to measure the amplitude  Test Setup voltage at CH1 and CH2. Use the following  1. Connect from the network analyzer source to  formula to calculate the PSRR (dB). the signal input of the 7114. 2. Connect from the 7114 outputs to the DUT’s  PSRR = 20log(CH2/CH1) supply input. 10. Adjust the frequency level of the function gen- 3. Make sure the DUT’s input is grounded.  erator to the next frequency to be tested and  4. Set the 7114’s Coupling switch to AC. repeat the oscilloscope measurements. Con- 5. Set the 7114’s Offset switch to Variable, and  tinue to make frequency adjustments until all  then adjust the Offset variable control knob  desired frequencies have been tested.  until the output DC voltage reaches the desired  6.6.3 Amplifier PSRR Measurement level (i.e., 3.3V).  6. Set the 7114’s Gain switch to fixed. AE Techron 7114 amplifier is great for making am- 7. Set the network analyzer’s output to a level ...

  • Page 26: Using The 7114 For Amplfier Cmrr Measurements

    2. Repeat the sweep of the network analyzer over  level (i.e., 3.3V).  the desired frequency range.  6. Set the 7114’s Gain switch to Fixed. 3. Subtract the calibration data and then plot the  7. Set the network analyzer’s output to a level  resulting PSRR data. 1/10 of the desired output  at the DUT’s input.  6.7 Using the 7114 for Amplfier CMRR CMRR Calibration (Refer to Figure 6.20) Measurements 1. Connect from the network analyzer’s Input A  A 7114 amplifiercan be useful for making Common  to the DUT’s connected positive and negative  Mode Rejection Ratio (CMRR) measurements for  inputs. devices like differential amplifiers and opamps.  2. Connect from the network analyzer’s Input B to  the same point at the DUT’s connected positive  6.7.1 Amplifier CMRR Measurement and negative inputs.

  • Page 27: Using The 7114 To Create Complex Waveforms

    7114  OPERATOR’S MANUAL – SECTION 6 Using the 7114 to Create Complex and sweep over the frequency range to be  Waveforms measured (i.e., 100 Hz to 100 kHz). Save the  calibration data for later use. (Refer  to the  The 7114 amplifier provides two front-panel and  network analyzer’s instruction manual for the  one back-panel connector for signal input. The  specifics of calibration setup.) front-panel BNC connector provides unbalanced  CMRR Testing (Refer to Figure 6.21) input, while the front-panel WECO and the back- 1. Connect the network analyzer’s Input B to the  panel DB-9 connectors provide balanced input.  DUT’s output. (Keep Input A connected to the  Signal input can occur from one, two, or all three  input.) connectors simultaneously. In addition, a DC offset  2. Repeat the sweep of the network analyzer over  signal can be added, allowing for the control and  the desired frequency range.  amplification of a wide range of complex wave- 3. Subtract the calibration data and then plot the  forms. resulting PSRR data. See Figure 6.21 for an example of a complex ...

  • Page 28: Maintenance

    7114 OPERATOR’S MANUAL – SECTION 7 7 Maintenance 7.1 Clean Filter and Grills 7.1.1 Tools Required Simple maintenance can be performed by the user  The recommended equipment and supplies  to help keep the equipment operational. The fol- needed to perform the functions required for this  lowing routine maintenance is designed to prevent  task are described below.  problems before they occur. See the Trouble- shooting section, for recommendations for re- • Vacuum cleaner  storing the equipment to operation after an error  • Damp cloth (use water only or a mild soap  condition has occurred.  diluted in water) To ensure adequate cooling and maximum effi- Preventative maintenance is recommended after  ciency of the internal cooling fans, the amplifier’s  the first 250 hours of operation, and every three  front and rear grills should be cleaned periodically.  months or 250 hours thereafter. If the equipment  To clean the grills, complete the following steps: environment is dirty or dusty, preventative mainte- nance should be performed more frequently.  1. Turn the unit OFF. Disconnect the unit from its  power source. 2. Using a vacuum cleaner, vacuum the front ven- CAUTION tilation grill and the back ventilation exit grill. ...

  • Page 29: Troubleshooting

    7114  OPERATOR’S MANUAL – SECTION 8 8 Troubleshooting Figure 8.1. 3. Slide the cover towards the back of the unit,  8.1 Introduction & Precautions and then lift the cover straight up to remove  and set aside. This section provides a set of procedures for  4. To replace the top cover, slide the cover in  identifying and correcting problems with the 7114   to place on the unit and replace the twelve amplifier. Rather than providing an exhaustive and  screws. detailed list of troubleshooting specifications, this  section aims to provide a set of shortcuts intended  8.2.1 Perform Inspection to get an inoperative unit back in service as quickly  1. To perform a Visual Inspection, first turn the  as possible. Power Switch to the Off (O) position. 2. Disconnect the AC mains plug from the unit.

  • Page 30: Fault Led Is Illuminated

    7114 OPERATOR’S MANUAL – SECTION 8 and replace the fuse, if required: adequate airflow. To check for adequate airflow,  1. Locate the fuse housing cover on the prod- proceed with the following steps: uct’s back panel (see Figure 6.2).  1. Visually inspect fans to assure correct opera- 2. Using a small, flat-blade screwdriver, turn  tion while the unit is On (I). When an Over- the cover counterclockwise to open the  Temp fault occurs, the product’s fans will  cover. automatically be placed in continuous high- 3. Remove the fuse, inspect, and replace if  speed operation. Any inoperative, visibly slow,  or reverse-spinning fan should be replaced.  needed. Please see the Factory Service information at  4. Replace the cover by using the flat-head  the end of this section. screwdriver to push the fuse cover into  2. Turn down your input signal and allow the fans  the fuse housing while turning the cover  to operate at high speed until they automati- clockwise. cally switch to low-speed operation, indicating  If power to the unit is not restored after replacing  the amplifier has cooled enough to resume  the fuse, one of the unit’s internal fuses may be  operation. blown. Return the unit to AE Techron for servicing.  Resetting After OverTemp See the Factory Service information at the end of To reset the product after an over-temperature ...

  • Page 31: Factory Service

    7114  OPERATOR’S MANUAL – SECTION 8 8.5.3 Overload Condition 8.6 Factory Service If the unit’s internal Overload Latch jumper setting  If the troubleshooting procedures are unsuccess- has been changed from the factory defaul and con- ful, the amplifier may need to be returned for  figured for shutdown when an overload condition oc- Factory Service. All units under warranty will be  curs, the FAULT indicator will light when an overload  serviced free of charge (customer is responsible  condition occurs. for one-way shipping charges as well as any cus- down the To clear the fault-at-overload condition, turn  tom fees, duties, and/or taxes). Please review the  level of the input signal and/or the gain control on the  Warranty at the beginning of this manual for more  information. front panel until the OVLD LED turns off. 8.5.4 Component Failure All service units must be given a Service Ticket by  AE Techron, Inc. before being returned. Service  The 7114 amplifier contains protection circuitry that  Tickets can be requested on our website at http:// disables the unit if an output stage is behaving ab- aetechron.com or by contacting our Customer  normally. This usually indicates an output transistor  Service Department at 574-295-9495. has shorted. Please take extra care when packaging your am- To clear the Fault condition, follow these steps: plifier for repair. It should be returned in its original ...

  • Page 32: Specifications

    7114 OPERATOR’S MANUAL – SECTION 9 9 Specifications OFFSET, Switch: None or Variable Performance Variable Control Knob: ±20V (configurable for  ±45V) Testing was done at 100 Hz. Continuous DC power levels are  lower. See DC Specifications chart. RAIL V Switch (voltage potential): 90V or 45V  Frequency Response, DC–100 kHz (1 watt):  GAIN, +0 to -3.0 dB Switch: 10X fixed or variable Small Signal (8V p-p): 500 kHz Variable Control Knob: 0-10X 8-Ohm Power Response (continuous duty), LED Displays indicate: Power, Signal, Overload,  DC to 60 kHz: ± 65 Vpk Fault DC to 80 kHz: ± 60 Vpk ...
  • Page 33 7114  OPERATOR’S MANUAL – SECTION 9 Protection Over/Under Voltage: Over Temperature: ±10% from specified supply voltage amplifier is  Separate output transistor, heat sink, and trans- forced to Standby former temperature monitoring and protection Over Current: Fuse on both main power and low voltage supplies AC Specifications – High Voltage Mode PEAK OUTPUT RMS OUTPUT 40 mSec Pulse, 5 Minutes, 1 Hour, 5 Minutes, 1 Hour, 20% Duty Cycle 100% Duty Cycle 100% Duty Cycle 100% Duty Cycle 100% Duty Cycle Ohms Volts Amps Volts Amps...

Table of Contents