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Associated Research 7704 Operation And Service Manual

Electrical safety compliance analyzers, 500va ac/dc hipot with insulation resistance tester 7704 includes ground bond tester 7700 includes continuity tester standard usb/rs-232 interface optional ieee-488 (gpib)
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500VA AC/DC HIPOT WITH INSULATION RESISTANCE TESTER
Models
7700/7704
Item 38701
OPERATION AND SERVICE MANUAL
MODEL 7704
MODEL 7700
Electrical Safety Compliance Analyzers
7704 includes GROUND BOND TESTER
7700 includes CONTINUITY TESTER
STANDARD USB/RS-232 INTERFACE
OPTIONAL IEEE-488 (GPIB)
SERIAL NUMBER
Ver 1.16
© Associated Research, Inc., 2014
13860 West Laurel Drive
Lake Forest, Illinois, 60045
U.S.A.
Printed November 07, 2014

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Summary of Contents for Associated Research 7704

  • Page 1 OPERATION AND SERVICE MANUAL MODEL 7704 MODEL 7700 Electrical Safety Compliance Analyzers 500VA AC/DC HIPOT WITH INSULATION RESISTANCE TESTER 7704 includes GROUND BOND TESTER 7700 includes CONTINUITY TESTER STANDARD USB/RS-232 INTERFACE OPTIONAL IEEE-488 (GPIB) SERIAL NUMBER Models © Associated Research, Inc., 2014...
  • Page 3 DECLARATION OF CONFORMITY Manufacturer: Associated Research, Inc. Address: 13860 W. Laurel Dr. Lake Forest, IL 60045 Product Name: 7700/7704 Electrical Safety Compliance Analyzer Model Number: 7700/7704 Conforms to the following Standards: Safety: IEC 61010-1:2010 IEC 61010-2-030:2010 IEC 61010-031:2002+A1 EN 61010-1:2010...

  • Page 5: Table Of Contents

    TABLE OF CONTENTS 1. Introduction........................1 1.1. Warranty Policies ....................1 1.2. Safety Symbols ....................2 1.2.1. Product Marking Symbols ...............2 1.2.2. Caution and Warning Symbols ..............2 1.3. Glossary of Terms .....................3 1.4. Safety ........................4 1.4.1. Service and Maintenance .................4 1.4.2. Test Station ....................5 1.4.3.
  • Page 6 4.2.1. AC Withstand Test Parameter Setting ...........35 4.2.2. DC Withstand Test Parameter Setting ...........39 4.2.3. Insulation Resistance Test Setting ............44 4.2.4. Ground Bond test setting model 7704 only ...........48 4.3. System Parameter Settings ................52 5. Operating Instructions ....................55 5.1. Setup .......................55 5.2.
  • Page 7 10.3.9. Calibration of IR XXX.XM range ............94 10.3.10. Calibration of IR XXXXM range ...........94 10.3.11. Calibration of Ground Bond AC Voltage (Model 7704 only) ...94 10.3.12. Calibration of Ground Bond AC Current (Model 7704 only) ...95 10.3.13. Calibration of Real Current for units with option 51 only ....95 11.

  • Page 9: Introduction

    All Associated Research instruments include the opportunity to extend the standard warranty for up to a period of 5 years. Returning instruments to Associated Research for their annual calibration and inspection will extend the instrument's warranty for an additional year. This warranty is extendable for up to five years and annual returns must be made in succession starting one year after the original purchase date.

  • Page 10: Safety Symbols

    1.2. Safety Symbols 1.2.1. Product Marking Symbols Product will be marked with this symbol when it is necessary to refer to the operation and service manual in order to prevent injury or equipment damage. Product will be marked with this symbol when hazardous voltages may be present. Product will be marked with this symbol at connections that require earth grounding.

  • Page 11: Glossary Of Terms

    Hipot Tester: Common term for dielectric-withstand test equipment. Hypot®: Registered trademark of Associated Research, Inc., for its dielectric-withstand test equipment. Gas, liquid or solid material which has a volume resistivity of at least 10 12 ohm-cm and is used Insulation: for the purpose of resisting current flow between conductors.

  • Page 12: Safety

    The instrument, its power cord, test leads, and accessories must be returned at least once a year to an Associated Research authorized service center for calibration and inspection of safety related components. Associated Research will not be held liable for injuries suffered if the instrument is not properly maintained and safety checked annually.

  • Page 13: Test Station

    1.4.2. Test Station Location Select an area away from the main stream of activity which employees do not walk through in performing their normal duties. If this is not practical because of production line flow, then the area should be roped off and marked for HIGH VOLTAGE TESTING. No employees other than the test operators should be allowed inside.

  • Page 14: Test Operator

    1.4.3. Test Operator Qualifications This instrument generates voltages and currents that can cause harmful or fatal electric shock and must only be operated by a skilled worker trained in its use. The operator should understand the electrical fundamentals of voltage, current, and resistance. They should recognize that the test instrument is a variable high-voltage power supply with the return circuit directly connected to earth ground, therefore, current from the high-voltage output will flow through any available ground path.

  • Page 15: Device Under Test

    1.4.5. Device Under Test Do not touch the device under test, high voltage test lead, alligator clip, or clip insulator once the test has been started. Do not touch the front panel when testing or after a malfunction has occurred. When testing with DC, always discharge the capacitance of the item under test and anything the high voltage may have contacted--such as test fixtures--before handling it or disconnecting the test leads.

  • Page 16: Introduction To Product Safety Testing

    1.5. Introduction to Product Safety Testing 1.5.1. The Importance of Safety Testing Product Safety Tests are specified during the design and development stages of a product as well as in the production of the products to insure that it meets basic safety requirements. These tests are designed to verify the safety of the electrical products in that they do not jeopardize the safety of the people, domestic animals, and property of anyone who may come in contact with these products.
  • Page 17 operating voltage, plus 1,000 volts. However, specific products may be tested at much higher voltages than 2X operating voltages + 1,000 volts. For example, a product designed to operate in the range between 100 to 240 volts can be tested between 1,000 to 4,000 volts or higher. Most "double insulated" products are tested at voltages much higher than the "rule of thumb".
  • Page 18 AC testing advantages AC testing is generally much more accepted by safety agencies than DC testing. The main reason for this is that most items being hipot tested will operate on AC voltages. AC hipot testing offers the advantage of stressing the insulation alternately in both polarities, which more closely simulates stresses the product will see in real use.

  • Page 19: Insulation Resistance Test

    which will indicate failure almost immediately if the total current reaches the leakage threshold during the initial charging of the product under test. Since a DC hipot does charge the item under test, it becomes necessary to discharge the item after the test.
  • Page 20 Compliance agency requirements vary on how different products are to be tested. Most specifications call for test currents of between 10 and 40 amps. Test voltages at these currents are typically required to be less than 12 volts. Maximum allowable resistance readings of the safety ground circuit are normally between 100 and 200 milliohms.

  • Page 21: Key Features And Benefits

    1.7. Key Features and Benefits: of Models 7700 and 7704  3-in-1 and 4-in-1 Multi- HypotMAX 7700 combines the three most common dielectric safety tests (AC Hipot, DC Hipot & IR test) function Compliance required by agencies such as UL, CSA, IEC, VDE, Analyzers offer 500 VA AC TÜV, BABT and others into a single instrument which...
  • Page 22  Patented SmartGFI® safety The patented SmartGFI® provides maximum operator protection to the user. If the circuit detects excessive circuit leakage to ground it shuts down the high voltage in less than 1 millisecond. SmartGFI is automatically activated if the DUT is not grounded. The operator does not need to make the decision whether to activate the SmartGFI.

  • Page 23: Getting Started

    2. Getting Started Introduction This section contains information for the unpacking, inspection, preparation for use and storage of your Associated Research, Inc., product. 2.1. Unpacking and Inspection 2.1.1. Packaging Your instrument was shipped in a custom foam insulated container that complies with ASTM...

  • Page 24: Work Area

    2.2.1. Work Area Locate a suitable testing area and be sure you have read all safety instructions for the operation of the instrument and suggestions on the test area set-up in the Safety section. Make sure the work area you choose has a three-prong grounded outlet.

  • Page 25: Environmental Conditions

    The output power supplies of this instrument are referenced directly to earth ground. Any conductor that completes a path between the high voltage and earth ground will form a completed circuit. Return Connection When the instrument Return is grounded, any internal and external stray leakage will be monitored due to currents that flow from High Voltage to earth ground (such as from HV to the chassis of the instrument).
  • Page 26 If the instrument is used in a manner not specified by the manufacturer, the protection provided by the instrument may be impaired. Storage and Shipping Environment This instrument may be stored or shipped in environments with the following limits: Temperature....-40° - 167° F (-40° - 75°C) Altitude....…..50,000 feet (15,240 meters) The instrument should also be protected against temperature extremes that may cause condensation within the instrument.

  • Page 27: Specifications And Controls

    3. Specifications and Controls Model 7704 and 7700 3.1. Functional Specifications INPUT 100/115/200/230 VAC  10, Single Phase, User selection Voltage Frequency 47 - 63 Hz Fuse 15 Amp 250V fast blow internal DIELECTRIC WITHSTAND TEST MODE Output Rating 5 KV @ 100 mA AC,...
  • Page 28 Current Display Auto Range AC Range 1: 0.000mA - 3.500mA Resolution: 0.001mA/step  (2 of reading  0.003mA) Accuracy: Range 2: 3.00 - 99.00 mA Resolution: 0.01 mA/step  (2 of reading  0.06mA) Accuracy: 0.0 A - 350.0 A DC Range 1: Resolution: 0.1 A/step ...
  • Page 29 Current : DC 0.1 A  0.01A, fixed Ground Continuity Max. ground resistance : 1   0.1, fixed Model 7700 only 450 A max (AC or DC) Ground Fault Interrupt GFI Trip Current: HV Shut Down Speed: < 1 ms Output Short Circuit >...
  • Page 30 450 A max (AC or DC) Ground Fault Interrupt GFI Trip Current: HV Shut Down Speed: < 1 ms...
  • Page 31 GROUND BOND TEST MODE Model 7704 only Output Voltage Range: 3.00 - 8.00 Volts AC (Open Circuit Limit) Resolution: 0.01 volt/step  (2 % of Setting + 0.03V ) O.C. Condition Accuracy: Output Frequency Range: 60 or 50 Hz, User Selection 1%...
  • Page 32 61.65 lbs (28 Kgs) Why use the term “Counts”? Associated Research publishes some specifications using COUNTS which allows us to provide a better indication of the tester’s capabilities across measurement ranges. A COUNT refers to the lowest resolution of the display for a given measurement range. For example, if the...

  • Page 33: Instrument Controls

    3.2. Instrument Controls 3.2.1. Front Panel Controls 7700 ASSOCIATED RESEARCH, INC. 500VA DIELECTRIC ANALYZER 10 11 14 15 19 20 1. ARC LED: This indicator will illuminate when the Arc Detector has detected an arcing condition. This indicator will function even when the Arc Fail has been disabled.
  • Page 34 7700 ASSOCIATED RESEARCH, INC. 500VA DIELECTRIC ANALYZER 10 11 14 15 19 20 7. TEST BUTTON: This is a momentary contact switch. Press the green button to turn on the high voltage output. Also illuminates to indicate a Pass condition. 8.
  • Page 35 20. RETURN OUTPUT JACK: For the connection of the detachable 5 foot (1.52 m) return test lead. This lead is always used when performing a test. On model 7704 this jack will carry high current for the Ground Bond test 21.

  • Page 36: Rear Panel Controls

    7. RETURN OUTPUT JACK: For the connection of the detachable 5 foot (1.52 m) return test lead. This lead is always used when performing a test. On model 7704 this jack will carry high current for the Ground Bond test.
  • Page 37 9. INPUT POWER SWITCHES: Line voltage selection is set by the position of these two switches. Follow the switch selection map to the left of the switches for the proper voltage selection. The two most common configuration are 115V and 230V input.

  • Page 38: Quickstart

    3.3. Quickstart This quick start guide assumes the operator has some familiarity with automated testing and desires to use the "default" settings on the instrument. The default settings shown will remain in memory unless you choose to override them with your own test program. The instrument default settings that appear in memories 1-40 are as follows: DEFAULTS Function...
  • Page 39 Defaults cont. Function Parameter Value Current 25.00A Voltage 6.00V HI-Limit 100m LO-Limit 0m Dwell 1.0s Frequency 60Hz Scanner Offset 0m Connect Setup PLC Remote Address (GPIB only) Contrast Volume Fail Stop Calibration Password MR-Lock Quick Start Instructions Cont.: Unpack the instrument from its special shipping container. Locate a suitable testing area and be sure you have read all safety instructions for the operation of the instrument and suggestions on the test area set-up in the Safety section.

  • Page 40: Operation

    Note: The Return Lead of this instrument is not connected directly to Earth Ground. If the DUT contacts Earth Ground directly, the instrument automatically operates in a grounded return mode. See the Smart GFI paragraph in the OPERATION section page 56 for details.

  • Page 41: General Operating Procedures

    4.1. General Operating Procedures 4.1.1. Key Lock setting Press the LOCK key. If the Password is Enabled, the display will show: Password = _ _ _ _ Range : 0 - 9 9 9 9 To view the password or enter a new one refer to the calibration procedure. Use the Numeric Key to enter the password and then press the ENTER key.

  • Page 42: Memory Configuration

    4.1.2. Memory Configuration Each memory location contains 8 separate steps which can be connected sequentially to the next consecutive step. Each step contains 4 separate locations, 1 for each function. Only one function can be selected for each step, but the other three function parameters remain stored in the memory.

  • Page 43: Step Selection

    4.1.4. Step Selection Press the STEP key, the display will show the test parameters of the functions selected for that step, i.e. the parameters of AC Withstand Voltage , DC Withstand Voltage, Insulation Resistance or Ground Bond test. Pressing the step key again will advance to the next step in sequence with step 1 following step 8.
  • Page 44 Use the Numeric keys to enter the voltage setting, then press the ENTER key. The program will store the voltage setting and advance to the High Limit parameter automatically. The unit is volt and 1 volt per step. Press the EXIT key to exit from the setting mode to the operation mode if all parameters have been set.
  • Page 45 Dwell Time setting Advance the menu to the Dwell Time parameter. The display will show: Dwell Time = XXX.X s Range : 0.3 - 999.9 0 = Constant Use the Numeric keys to enter the Dwell Time setting, then press the ENTER key. The program will store the Dwell Time setting and advance to the Frequency selection parameter automatically.
  • Page 46 Use the ENTER key to select the Arc Fail mode, then press the  or  key to advance the program to another test parameter or press the EXIT key to exit from the setting mode to the operation mode. If the Arc Fail mode is set to ON, the program will indicate an arc failure when the arc current is over the setting.

  • Page 47: Dc Withstand Test Parameter Setting

    Use the ENTER key to select the Step Connection mode, then press  or  key to advance the program to another test parameter or press the EXIT key to exit from the setting mode to the operation mode. If Connect is set to ON, the next step in the sequence will be executed. If Connect is set to OFF, the test sequence will stop at this step.
  • Page 48 HI-Limit Current setting Advance the menu to the HI-Limit parameter. The display will show: HI-Limit = XXXX A Range : 0 – 9999 Use the Numeric keys to enter the HI-Limit setting, then press the ENTER key. The program will store the HI-Limit setting and advance to the Low Limit parameter automatically.
  • Page 49 Dwell Time setting Advance the menu to the Dwell Time parameter. The display will show: Dwell Time = XXX.X s Range : 0.5 - 999.9 0 = Constant Use the Numeric keys to enter the Dwell Time setting, then press the ENTER key. The program will store the Dwell Time setting and advance to the Charge-LO parameter automatically.
  • Page 50 Charge-LO = XXX.X A TEST to Auto Set The value showing on the display is the Charge-LO setting and is not the reading of the charging current of the DUT. Then press the  or  key to advance the program to another test parameter or press the EXIT key to exit from the setting mode to the operation mode.
  • Page 51 If the Arc Fail mode is set to ON, the program will indicate an arc failure when the arc current is over the setting. The program will shut down the test immediately and the ARC indicator on the front panel will light. If the Arc Fail mode is set to OFF, the program will not indicate an arc failure when the arc current is over the setting.

  • Page 52: Insulation Resistance Test Setting

    If Step 8 is set to ON the test process will be connected to the first step of the next Memory. 4.2.3. Insulation Resistance Test Setting Press the INSULATION key and the display will show: IR Set XXX.X s Note: X = the numeric MXX-X XXXX V XXXXX M...
  • Page 53 Charge-LO Advance the menu to the Charge-LO parameter. The display will show: Charge-LO = X.XXX A TEST to Auto Set The Charge-LO function is used to check if the test cables are connected properly at the beginning of a test. A capacitive DUT will draw charging current on the Insulation Resistance test when the Output is activated.
  • Page 54 HI-Limit Current setting Advance the menu to the HI-Limit parameter. The display will show: HI-Limit = XXXX M Range : 1 - 9999 Use the Numeric keys to enter the HI-Limit setting, then press the ENTER key. The program will store the HI-Limit setting and advance to the LO-Limit parameter automatically.
  • Page 55 If the Delay Time is set to “0,” the test will continue until the RESET button is pressed. The display will show the measured readings during the test. The timer will continue to count the total test time and then will automatically reset to 0 and start over. Scanner Channel setting Advance the menu to the Scanner Set parameter.

  • Page 56: Ground Bond Test Setting Model 7704 Only

    4.2.4. Ground Bond test setting model 7704 only Press the GND key and the display will show: GND Set XXX.X s Note: X = the numeric MXX-X XX.XX A XXX m GND Set : Ground Bond test setting screen XXX.X s...
  • Page 57 Advance the menu to the HI-Limit parameter. The display will show: HI-Limit = XXX m Range : 0 - 600 Use the Numeric keys to enter the HI-Limit setting, then press the ENTER key. The program will store the HI-Limit setting and advance to the LO-Limit parameter automatically.
  • Page 58 If the Dwell Time is set to “0”, the timer will continue to count to the maximum test time then reset to 0 and start over automatically. The test will continue until a reset is executed or a failure occurs. Frequency Selection Advance the menu to the Frequency parameter.
  • Page 59 For Manual Offset, use the Numeric keys to enter the m Offset value and then press the ENTER key. The program will store the m Offset setting and advance to the Connect setting. The range of m Offset is from 0 to 200 m. The unit is m and 1m per step. For Auto Offset, setup the test parameter of Output Voltage, Current and Frequency and connect the test cables and/or test fixture to the instrument first.

  • Page 60: System Parameter Settings

    4.3. System Parameter Settings Use the SETUP key to progress through the menu of System Parameters. Successive key presses will advance the menu forward. The sequential forward menu items are: PLC Remote, Address, Contrast, Volume, Fail Stop. The setting of system parameters affect the operating conditions of the instrument and are separate from the functional settings.
  • Page 61 Range : 0 - 30 Use the Numeric keys to enter the GPIB Address number, then press the ENTER key and the display will show the current address immediately. Press the SETUP key to advance to the Contrast setting, or press the EXIT key to exit from the address setting to the operation mode.
  • Page 62 Fail to Stop/Continue selection Press the Setup key to advance the menu to the Fail Stop parameter. The display will show: Fail Stop = Fail Stop = ENTER to Select ENTER to Select Use the ENTER key to select the mode of Fail Stop. After the selection of Fail Stop mode, press the SETUP key to advance to the beginning of the menu (PLC Remote), or press the EXIT key to exit from the Fail Stop selection to the operation mode.

  • Page 63: Operating Instructions

    Turn on the Input Power Switch. The display will show the Trade Mark, Model Number and Version Number first, as follows: ARI HYPOTMAX 7704 VER : X.X Note: X = Numeric. Then, all status LEDs will light up, and the Scanner status LEDs will light sequentially if the internal scanner has been installed.
  • Page 64 The following are examples of the four types of Setting Screens before any test has been executed. If the first step selected is an AC Withstand test, the display will show: ACW Set XXX.X s M25-1 X.XX KV XX.XX mA ACW Set : AC Withstand Voltage test setting screen XXX.X s...

  • Page 65: Ground Continuity Test (7700 Only)

    If the first step selected is a Ground Bond test, the display will show: GND Set XXX.X s M25-1 XX.XX A XXX m GND Set : Ground Bond test setting screen XXX.X s : Dwell Time setting : Memory Program number : Test Step number XX.XX A : AC Output Current setting...

  • Page 66: Reviewing Test Results

    5.7. Displayed Messages 5.7.1. Ground Bond Displayed Messages (Model 7704 only) If the test in process is Aborted with the RESET button or remote control, the display will show: GND Abort XXX.X s...

  • Page 67: Ac Withstand Displayed Messages

    GND Dwell XXX.X s MXX-X - - . - - A - - - m During the Ground Bond test, when the values are being updated in real time, the display will show: GND Dwell XXX.X s MXX-X XX.XX A XXX m...
  • Page 68 MXX-X - . - - KV - - . - - mA MXX-X X.XX KV - - . - - mA At the beginning of AC Withstand Voltage test when the voltage begins to ramp but before the meter readings are taken, the display will show: ACW Ramp XXX.X s MXX-X...

  • Page 69: Dc Withstand Displayed Messages

    If the DUT current is well beyond the metering range of AC Withstand Voltage test and an Arcing condition beyond the Arc Sense limit is indicated, the display will show: ACW Breakdown XXX.X s  40 mA MXX-X X.XX KV If the DUT current falls below the LO-Limit of AC Withstand Voltage test the display will show: ACW LO-limit...
  • Page 70 If the test in process is Aborted with the RESET button or remote control before the meter readings are taken, the display will show: DCW Abort XXX.X s DCW Abort XXX.X s - - - - A - - - - A MXX-X - .
  • Page 71 If the DUT current exceeds the HI-Limit of DC Withstand Voltage test and the leakage current is within the metering range, the display will show: DCW HI-Limit XXX.X s MXX-X X.XX KV XXXX A If the DUT current exceeds the HI-Limit of DC Withstand Voltage test and the leakage current is not within the metering range, the display will show: DCW HI-Limit XXX.X s...

  • Page 72: Insulation Resistance Displayed Messages

    When the DUT passed the DC Withstand Voltage test, when the test process is complete the display will show: DCW Pass XXX.X s MXX-X X.XX KV XXXX A 5.7.4. Insulation Resistance Displayed Messages If the test in process is Aborted with the RESET button or remote control, the display will show: IR Abort XXX.X s...
  • Page 73 If the DUT current exceeds the HI-Limit of Insulation Resistance test and the resistance is not within the metering range, the display will show: IR HI-Limit XXX.X s MXX-X XXXX V  9999 M If the DUT current falls below the LO-Limit of Insulation Resistance test and the resistance is within the metering range, the display will show: IR LO-Limit XXX.X s...

  • Page 74: Remote Control

    Remote Control Two 9 pin “D” type connectors are mounted on the rear panel which provide REMOTE- INPUT-OUTPUT control and information. These connectors mate with standard 9 pin “D” subminiature connector provided by the user. The output mates to a male (plug) connector while the input mates to a female (receptacle) connector.

  • Page 75: Signal Inputs On Remote I/O And Memory

    The HypotMAX 7700 or HypotMAX 7704 basically operates in a PLC mode by responding to simple switch or relay contact closures. The built in memory programs of the instrument are used to accomplish this.
  • Page 76 DO NOT CONNECT VOLTAGE OR CURRENT TO THE SIGNAL INPUTS, THIS COULD RESULT IN DAMAGE TO THE CONTROL CIRCUITRY. MEMORY ONE - Momentarily connecting terminal 7 to 8 signals the instrument to immediately begin the test program that is stored in memory one. MEMORY TWO - Momentarily connecting terminal 7 to 9 signals the instrument to immediately begin the test program that is stored in memory two.

  • Page 77: Adapter Box Connection

    When the Ground Bond test is selected on the HypotMAX 7704 the High Current will be applied through the Current lead to the Adapter box and flow back through the Return lead.

  • Page 78: Bus Remote Interface Gpib / Rs-232

    This section provides information on the proper use and configuration of the GPIB and USB/RS-232 interfaces. The USB/RS-232 remote interface is standard on model 7700 and 7704. The GPIB (IEEE-488) interface can be substituted for the USB/RS-232 interface. The USB/RS-232 interface card requires the user to download a driver in order for the instrument to recognize the USB interface.

  • Page 79: Functions

    8.3. Functions A GPIB device can be a Listener, Talker and/or Controller. A Talker sends data messages to one or more Listeners, which receive data. A Controller manages the information flow on the GPIB by sending commands to all devices. The GPIB bus is much like a computer bus except a computer has circuit cards connected via a backplane and the GPIB has stand alone devices connected via a cable.

  • Page 80: Gpib Connector

    EOI (end or identify) This line has two purposes- the Talker uses this line to mark the end of a message string, and the Controller uses it to tell devices to identify their response in a parallel poll. 8.5. GPIB Connector Connection is usually accomplished with a 24-conductor cable with a plug on one end and a connector at the other end.

  • Page 81: Gpib Address

    Each device on the GPIB (IEEE-488) interface must have a unique address. You can set the address of the 7704 or 7700 to any value between 0 and 30. The address is set to 8 when the instrument is shipped from the factory. The address can only be set from the front panel.
  • Page 82 accumulate data being sent from the instrument including the echo response string, until it is read by the controller.

  • Page 83: Interface Bus Command List

    Functio Specific Test Reset ACW Function Select DCW Function Select IR Function Select GND Function Select (7704 only) ACW/DCW: Continuity On (7700 Only) ACW/DCW: Continuity Off (7700 Only) ACW: 60Hz ACW: 50Hz ACW: Arc Fail On ACW: Arc Fail Off...
  • Page 84 The following “S” commands will set test parameters on the instrument that require numeric or alphanumeric input. To execute these commands, the appropriate function must first be selected with the above Function Select command FC, FD, FE, or FF, to have access to the parameter menu.
  • Page 85 GND (7704 only) Command Parameter Value Unit Current 3.00 - 30.00 Volt 3.00 - 8.00 HI-Limit 0 - 600 m LO-Limit 0 - 600 m Dwell Time 0.5 - 999.9 Scanner 1 - 16 Channel Offset 0 - 200 m...

  • Page 86: Gpib Service Request

    Ground Bond Read the Ground Offset Setting Offset G-Bond mode must be active. DCW Charge-LO Read the DCW Charge-LO Setting. DCW mode must be active. IR Charge-LO Read the IR Charge-LO Setting IR mode must be active. Remote Reset 01 hex = Reset ON Status 00 hex = Reset OFF Interlock Status...

  • Page 87: Example Of Communicating Over The Ieee Bus

    8.11. Example of communicating over the IEEE bus To write commands over the IEEE bus you must enter the code that is specific to the software language you are using. Then follow the example below: To set the output voltage across the IEEE bus at 1240 volts do the following. First select the ACW mode by sending the string “FC”...

  • Page 88: Options

    For example your options code would appear as follows: fitted with option 03 .............. OPT: 03 fitted with option 03 and 06............ OPT: 0306 7700, 7704 Options Option List Code Description High Resolution IR Megohm meter (50K) Dual Remote Test Switches...
  • Page 89 03 High Resolution IR Megohm meter This option will allow for lower resistance readings than the standard instrument. The reading resolution is improved to 0.1K from the previous 1M. The minimum reading is 50K and maximum is reduced to 99.99M. The other specifications in other modes remain the same.
  • Page 90 08 Printer Port Option This option allows the instrument to generate hardcopy printout of the test results. The printout can be configured to print automatically with each test, or manually by pressing a front panel key. There is also capability to enter a serial number identifier to each test, that increments automatically after each test is performed.
  • Page 91 3. Print Number Please press the Setup key. This menu selection is only available when Auto Print has been enabled, when Auto Print = ON the screen will show: Print NO. = 0 Range : 0 - 9999 The print number is used to identify each test result. The number can be set to match the exact serial number or some portion of actual serial number of the item under test or just used as an identifier or tracking number.
  • Page 92 12 Enhanced Ramping AC Ramp Down The AC ramp down feature allows the AC voltage applied to the DUT, to be reduced linearly over a specified period at the end of a hipot test. There are three set up screens associated with this feature that will allow control of Ramp-Up, Dwell, and Ramp-Down.
  • Page 93 During the AC Withstand Voltage test Ramp-up, the display will show the values being updated in real time as follows: ACW Ramp-up XXX.X s MXX-X X.XX KV XX.XX mA During the AC Withstand Voltage test dwell cycle, the display will show the values being updated in real time as follows: ACW Dwell XXX.X s...
  • Page 94 Dwell Time= XXX.X s Range : 0.3 - 999.9 0=Constant Use the “Numeric” keys to enter the Dwell time setting, then press the “ENTER” key. The program will store the Dwell Time setting and advance to the Ramp Down Time parameter automatically.
  • Page 95 DCW Dwell XXX.X s - - - - A MXX-X - . - - KV At the end of the dwell cycle when the voltage begins to ramp down, the display will show the values being updated in real time as follows: DCW Ramp-down XXX.X s MXX-X X.XX KV XXXX A...
  • Page 96 Displayed messages for Enhanced IR Ramping At the beginning of an Insulation Resistance test when the voltage begins to ramp but before the meter readings are taken, the display will show: IR Ramp-up XXX.X s MXX-X XXXX V - - - - M NOTE: The Insulation Resistance display reading will remain blank until the minimum Insulation Resistance Voltage has been reached.

  • Page 97: Calibration Procedure

    10. Calibration Procedure 10.1. Calibration Initialization Press the 0 and 1 keys simultaneously and then turn the input power switch on. The program will automatically enter to the calibration mode and the display screen will show: Calibration Mode  : Forward  : Backward Use the ...

  • Page 98: Calibration Points

    10.3. Calibration Points 10.3.1. Calibration of AC Hipot Voltage Press the  key, the program will advance to the AC Voltage calibration of the hipot test. The display will show: ACW Voltage,5000V T E S T t o C a l i b r a t e Connect an AC standard voltage meter which can measure up to 5000V to the output connectors and then press the TEST button, the program will automatically generate an output of about 5000VAC and the display will show:...

  • Page 99: Calibration Of Ir Dc Voltage

    10.3.3. Calibration of IR DC Voltage Press the  key, the program will advance to the DC Voltage calibration of the IR test. The display will show: IR Voltage, 1000V T E S T t o C a l i b r a t e Connect a DC standard voltage meter which can measure up to 1000V to the output connectors and then press the TEST button, the program will automatically generate an output of about 1000VDC and the display will show:...

  • Page 100: Calibration Of Dc 10Ma Range

    10.3.5. Calibration of DC 10mA Range Press the  key, the program will advance to the DC 10mA range calibration of the hipot test. The display will show: DC 10mA, 100K T E S T t o C a l i b r a t e Connect a resistor about 100K/10W in series with a DC standard Ammeter which can measure up to 10mA to the output leads.

  • Page 101: Calibration Of Dc 3500A Range

    AC 3.5mA, 100K T E S T t o C a l i b r a t e 10.3.7. Calibration of DC 3500A Range Press the  key, the program will advance to the DC 3500A range calibration of hipot test. The display will show: DC 3500A, 100K...

  • Page 102: Calibration Of Ir Xxx.xm Range

    T E S T t o C a l i b r a t e 10.3.11. Calibration of Ground Bond AC Voltage (Model 7704 only) Press the  key, the program will advance to the AC Voltage calibration of the Ground bond test.

  • Page 103: Calibration Of Ground Bond Ac Current (Model 7704 Only)

    T E S T t o C a l i b r a t e 10.3.12. Calibration of Ground Bond AC Current (Model 7704 only) Press the  key, the program will advance to the AC Current calibration of the Ground bond test.
  • Page 104 Use the Numeric keys to enter the standard value of current, unit mA, and then press the ENTER key to store the standard value of AC Real current and display will show: AC 5mAR, 500K T E S T t o C a l i b r a t e...

  • Page 105: Replacement Parts List

    37778 CGC-02 (7700 only) Ground Continuity Check Board 38313 7440 Main Control Board 37995 REC-H15 (7700 only) Rectifier Board 7700 37996 REC-H15 (7704 only) Rectifier Board 7704 Internal Components 37981 Input Transformer with ground shield 37982 Output High Voltage Transformer...
  • Page 106 Part Number Qty. Ref. Designator Description 37983 T3 (7704 only) Transformer High Current Toroidal 37697 IC12 IC Microcontroller 8-bit 20Mhz 89C52...
  • Page 107 Index AC Withstand................25, 34, 55, 58, 59, 60, 83, 84, 94 Adapter Box ........................16, 68, 96 Arc..............19, 24, 29, 34, 36, 37, 38, 41, 42, 60, 62, 73, 74 Benefits ............................14 Breakdown ......................... 3, 24, 60, 62 Calibration Procedure ....................
  • Page 108 Measuring Device ........................12 Medical Restrictions ........................6 Memory . 23, 24, 25, 27, 29, 31, 32, 33, 34, 38, 40, 43, 44, 46, 47, 50, 51, 53, 54, 55, 56, 57, 66, 67, 68, 72, 75, 77, 82, 88 Menu 12, 25, 32, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 73, 74, 80, 81, 82, 88, 94 Offset............................

This manual is also suitable for:

7700

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