__________________________________________________ Introduction Thank you for purchasing the HIOKI "9279 UNIVERSAL CLAMP ON CT". To obtain maximum performance from the product, please read this manual first, and keep it handy for future reference. Inspection When you receive the product, inspect it carefully to ensure that no damage occurred during shipping.
__________________________________________________ Safety Notes DANGER This product is designed to conform to IEC 348 Safety Standards, and has been thoroughly tested for safety prior to shipment. However, mishandling during use could result in injury or death, as well as damage to the product. Be certain that you understand the instructions and precautions in the manual before use.
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__________________________________________________ The following symbols in this manual indicate the relative importance of cautions and warnings. Indicates that incorrect operation presents an extreme hazard that could result in serious DANGER injury or death to the user. Indicates that incorrect operation presents a significant hazard that could result in serious WARNING injury or death to the user.
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__________________________________________________ Accuracy The specifications in this manual include figures for "measurement accuracy" when referring to digital measuring instruments, and for "measurement tolerance" when referring to analog instruments. f.s. (maximum display or scale value, or length of scale) Signifies the maximum display (scale) value or the length of the scale (in cases where the scale consists of unequal increments or where the maximum value cannot be defined).
__________________________________________________ Notes on Use Follow these precautions to ensure safe operation and to obtain the full benefits of the various functions. DANGER To avoid short circuits and potentially life- threatening hazards, never attach the UNIVERSAL CLAMP ON CT to a circuit that operates at more than the 600 Vrms, or over bare conductors.
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__________________________________________________ CAUTION Note that the product may be damaged if current exceeding the selected measurement range is applied for a long time Do not store or use the product where it could be exposed to direct sunlight, high temperature or humidity, or condensation.
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__________________________________________________ Accurate measurement may be impossible in NOTE the presence of strong magnetic fields, such as near transformers and high-current conductors, or in the presence of strong electromagnetic fields such as near radio transmitters. _____________________________________________...
__________________________________________________ Chapter 1 Overview 1.1 Product Overview The 9279 was developed for to provide a 500 A clamp sensor corresponding to AC/DC current. The 9279 makes it possible to measure AC/DC current in live power lines without cutting into the lines. The sensor features good frequency...
__________________________________________________ 1.2 Names of Parts Lever Current direction indication Clamp core DMAG switch Cable Output connector _____________________________________________ Chapter 1 Overview...
__________________________________________________ Chapter 2 Measurement Procedure 2.1 Measurement Procedure CAUTION To avoid damaging the output cable, grasp the connector, not the cable, when unplugging the cable. To prevent damage to the product and sensor, never connect or disconnect a sensor while the power is on. The maximum continuous input range is based on heat that is internally generated during measurement.
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__________________________________________________ To measure small current levels, multiple NOTE windings may be used to increase the relative sensitivity. 10 windings multiplies the measured current by about a factor of 10. However, in this case the diameter of the winding should be 20 cm or more, and radial. This product has a resistance in series with the signal output circuits.
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__________________________________________________ 1. Close the clamp jaws when the clamp jaws are opened. 2. Make sure that the unit's power switch is OFF. 3. Connect the clamp-on CT connector to the unit. 4. Turning the power on the unit. 5. Press the DMAG switch to magnetize.
DMAG switch with no input on the clamp, to return to normal. If it does not return to normal condition, or even pressing DMAG, the magnetic is remained in the core, contact your dealer or Hioki representative. _____________________________________________ Chapter 2 Measurement Procedure...
__________________________________________________ Chapter 3 Specification Rated current 500 A f.s. (AC/DC) Output voltage 2 V/500 A (AC/DC) The maximum 650 Arms (920 Apeak) permissible input range (DC to 3 kHz) Input resistance (DC) 0.001 mΩ or less 50 Ω Output resistance Basic accuracy DC and 45 Hz to 66 Hz, 30 min or 23 3...
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__________________________________________________ Dielectric strength 2200 Vrms for 1 min. (between electric circuit and case, between electric circuit and core) Insulation resistance 500 V DC 100 MΩ or more (between electric circuit and case, between electric circuit and core) Maximum rated 600 Vrms (850 Vpeak) insulated voltage to earth conductor Diameter of...
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ID1 8 Identifying signal ID2 9 Identifying signal Shield (cable) Output connector pin array 9279 Connect to GND Mating receptacle RM515ERB-10SD (HIROSE) CAUTION Be careful to avoid connecting voltage improperly, as the internal circuitry may be destroyed. The capacity of the power supply is at least 0.5 A.
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__________________________________________________ Frequency 9279 The maximum permissible input range (continuous) _____________________________________________ Chapter 3 Specification...
Hioki representative. Pack the product carefully so that it will not be damaged during shipment, and include a detailed written description of the problem. Hioki cannot be responsible for damage that occurs during shipment. _____________________________________________ Chapter 4 Maintenance and Service...
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__________________________________________________ _____________________________________________ Chapter 4 Maintenance and Service...
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HIOKI 9279 UNIVERSAL CLAMP ON CT Instruction Manual Publication date: March 2004 Revised edition 3 Edited and published by HIOKI E.E. CORPORATION Technical Sales Support Section All inquiries to International Sales and Marketing Department 81 Koizumi, Ueda, Nagano, 386-1192, Japan TEL: +81-268-28-0562 / FAX: +81-268-28-0568 E-mail: os-com@hioki.co.jp...
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9279A981-03 04-03H Printed on recycled paper...
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