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    Model 501

    Insulation TesterINSTRUCTION MANUAL

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    SIMPSON ELECTRIC COMPANY 520 Simpson AvenueLac du Flambeau, WI 54538-0099 (715) 588-3311 FAX (715) 588-3326

    Printed in U.S.A. Part No. 06-116817 Edition 3, 06/07Visit us on the web at: www.simpsonelectric.com

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    SHOCK HAZARD: As defined in American National Standard, C39.5, SafetyRequirements for Electrical & Electronic Measuring & Controlling Instrumenta-tion, a shock hazard shall be considered to exist at any part involving a potentialin excess of 30 volts RMS (sine wave) or 42.4 volts DC or peak and where aleakage current from that part to ground exceeds 0.5 milliampere, when mea-sured with an appropriate measuring Instrument defined in Section 11.6.1 ofANSI C39.5.

    NOTE: The proper measuring Instrument for the measurement of leakage cur-rent consists essentially of a network of a 1500 ohm non-inductive resistor shuntedby a 0.15 microfarad capacitor connected between the terminals of the measur-ing Instrument. The leakage current is that portion of the current that flows throughthe resistor. The Simpson Model 229-Series 2 AC Leakage Current Tester meetsthe ANSI C39.5 requirements for the measurement of AC leakage current andcan be used for this purpose. To measure DC Leakage current, connect a 1500ohm non-inductive resistor in series with a Simpson 0-500 DC microammeterand use this as the measuring Instrument.

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    8.5. Technical Assistance

    Simpson Electric Company offers assistance Monday thru Friday 7:30 a.m. -5:00 p.m. Central Time. Contact Technical Support or Customer Service at (847)697-2260.

    9. NIST CERTIFICATION

    Simpson Electric Company Standards Lab has the technical expertise and properfacility to handle National Institute of Standards and Technology (NIST) certifica-tion. Simpsons Quality Assurance Calibration System satisfies the requirementsof MIL-I-45208A, MIL-I-45662A and ANSI/NCSL Z540-1-1994. For a nominalcharge you can certify that your Instrument has been calibrated under controlledenvironmental conditions to the manufacturers specifications. Just call a SimpsonCustomer Service Representative at (847) 697-2260.

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    2. SAFETY PRECAUTIONS

    This insulation tester is constructed and tested in accordance with the followingstandards:IEC 1010-1/EN 61010-1: IEC 1557-2/EN 61557-2: IEC 1557-4/EN 61557-4.To ensure safe operation and to prevent damage to the Instrument, read and

    follow all instructions in this operating manual before using Instrument.

    2.1 Repair and Replacement of Parts

    When operating the tester, live parts may become exposed. Disconnect from allvoltage sources before repairing or replacing parts. Only qualified personnelshould replace or repair parts if Instrument must stay connected to voltage sources.

    Faults and Unusual Stress

    Operating the Instrument safely may be no longer possible if:a. Instrument is visibly damaged.

    b. Instrument no longer performs.c. Instrument is stored for long period under unfavorable conditionsd. Instrument has endured heavy transport.

    For safety reasons connected test leads are double-insulated. Each insulationhas a different color making damage to the outer insulation noticeable beforeinner insulation is affected.

    3. OPERATION

    3.1 Inserting Batteries

    Be sure that the function switch is in the 1000V position before opening thebattery compartment and that the Instrument is disconnected from all externalcurrent circuits.

    1. Unscrew lid to the battery compartment.2. Insert 6 standard 1.5 V batteries (D size) into the battery compartment match-

    ing symbols on batteries with the symbols on Instrument3. Replace compartment lid and screws.

    3.2 Testing Batteries

    Pressing the test key automatically tests the batteries. The instantaneous load istaken into account by the selected position of the function switch and the nominalvoltage. Signal light on the left of the scale shows battery condition as follows:

    Green: Batteries are fully chargedRed: Batteries are too weak for the selected type of measurement

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    7. TECHNICAL SPECIFICATIONS

    1 Referred to the scale length2 With the electrical zero point adjusted correctly

    Table 7-13 Switching accuracy4 Normal current IN 1 mA

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