Safety Symbol 3291-50 CLAMP ON HiTESTER Instruction Manual January 2012 Revised edition 2 Printed in Japan 3291C981-02 12-01H In the manual, the symbol indicates particularly important information that the user should read before using the instrument. The symbol printed on the instrument indicates that the user should refer to a corresponding topic in the manual (marked with the symbol) before using the relevant function. Names and Functions of Parts Indicates AC (Alternating Current). Clamp Sensor Indicates DC (Direct Current). Indicates that the instrument may be connected to or disconnected from a live circuit. Indicates a double-insulated device. Press both MAX value • Clear Indicates a prohibited action. Symbols for Various Standards This symbol indicates that the instrument conforms to safety regulations set out by the EC Directive. WEEE marking: This symbol indicates that the electrical and electronic appliance is put on the EU market after August 13, 2005, and producers of the Member States are required to display it on the appliance under Article 11.2 of Directive 2002/96/EC (WEEE). Press once • Data hold Press 2 sec. • Back light Barrier Notation of the This Manual Press once • Maximum data • Instantaneous value Press 2 sec. • Power OFF Press once • Digital display Press 2 sec. • Filter OFF/ON Lever Display (LCD) The following symbols in this manual indicate the relative importance of cautions and warnings. Introduction Thank you for purchasing the HIOKI Model 3291-50 CLAMP ON HiTESTER. To obtain maximum performance from the instrument, please read this manual first, and keep it handy for future reference. Overview Because it employs a small, thin-type sensor the 3291-50 Clamp On HiTester can clamp even in narrow places. In addition, the angle of the display panel can be changed to suit the measuring location and the back light makes the instrument easy to use even in dark places. Inspection Initial Inspection When you receive the instrument, inspect it carefully to ensure that no damage occurred during shipping. If damage is evident, or if it fails to operate according to the specifications, contact your dealer or Hioki representative. Maintenance and Service • To clean the instrument, wipe it gently with a soft cloth moistened with water or mild detergent. Never use solvents such as benzene, alcohol, acetone, ether, ketones, thinners or gasoline, as they can deform and discolor the case. • If the protective functions of the instrument are damaged, either remove it from service or mark it clearly so that others do not use it inadvertently. • If the instrument seems to be malfunctioning, contact your dealer or Hioki representative. Safety This manual contains information and warnings essential for safe operation of the instrument and for maintaining it in safe operating condition. Before using it, be sure to carefully read the following safety precautions. This instrument is designed to comply with IEC 61010 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 instrument. However, using the instrument in a way not described in this manual may negate the provided safety features. Be certain that you understand the instructions and precautions in the manual before use. We disclaim any responsibility for accidents or injuries not resulting directly from instrument defects. Indicates that incorrect operation presents a significant hazard that could result in serious injury or death to the user. (Magnified View) Alternating current (AC) MAX MAX value Data hold function FILTER Filter ON Bar graph Indicates that incorrect operation presents a possibility of injury to the user or damage to the device. Indicates advisory items related to performance or correct operation of the instrument. Measurement categories Over range * The device considers the maximum displayed value to be the MAX value. • Do not store or use the instrument where it could be exposed to direct sunlight, high temperature or humidity, or condensation. Under such conditions, the instrument may be damaged and insulation may deteriorate so that it no longer meets specifications. • This instrument contains a magnetic core. The device should not be used by anyone with a pacemaker or any other electronic medical devices installed in his body. Display update rate 1.1 sec. or less Display LCD: monochrome, 91 segments Operating temperature 0 to 40°C (32 to 104°F), 80%RH or less and humidity (with no condensation) Storage temperature -10 to 50°C (14.0 to 122.0°F), 80%RH or less and humidity （with no condensation) indoors, Pollution degree 2, Location for use Altitude up to 2000 m (6562 feet) Maximum rated power 25 mVA Power supply CR2032 x 1 Lithium battery Battery lifetime Dimensions Mass Approx. 115 g (4.1 oz.) Dielectric strength 5312 Vrms /15sec., 5 mA sensitivity current between the chassis and clamp core Applicable standards Safety EN61010 EMC EN61326 Minimum resolution 2.00 A to 60.00 A 0.01 A 600 A 54.0 A to 600.0 A 0.1 A 540 A to1000 A 1A ON: Grasping the lever and opening wide the Clamp Sensor (sideways). OFF: Press POWER OFF key for 2 seconds or longer. Filter Details of operation: Low pass filter ON/OFF Cutoff frequency:180 Hz±30 Hz (-3dB) Initial setting: OFF (Always OFF when the power supply is turned on; non-filtered data is not saved) Activate/De-activate: Press FILTER key for 2 seconds or longer. *When set to ON, the filter removes noise and other unwanted frequency components. Data hold Details of operation: Holds measured values (data update is halted) Activate: Pressing the key once. De-activate:Pressing the key once. Filter ON/OFF MAX value display Details of operation: Displays the maximum measured values reached since the power has been turned on. Activate/De-activate: Pressing the MAX key once. Clear displayed maximum value: Press MAX key and HOLD key at the same time. Filter ON/OFF Auto power-off Details of operation: The power cuts off when "0" is displayed continuously for 1 minute. Any key operation is not performed for approx.10 minutes. To de-activate: Power ON while pressing the key. Battery Level Indicator Details of operation:Displays 4 levels of remaining battery charge. *Refer to “Replacing Battery”. Back light Activate/De-activate: Press key for 2 seconds or longer. (About 15 seconds lighting.) Frequent use of backlight reduces battery life. Liquid crystal display (LCD) reversal Details of operation: Automatically reverses when the display panel is opened and closed. Manual reversal: Pressing the key once. *Refer to “Opening and Closinng the Display Panel”. Bar graph Shows the proportion of the measured value to the range. Over-Range Display Displays “OVER”when a high crest factor current is inputted, which means an out of the accuracy guarantee. *Refer to “Crest factor”. Accuracy FILTER OFF FILTER ON ±1.5%rdg.±5dgt. (45 Hz to 66 Hz) ±3%rdg.±5dgt. (66 Hz to 400 Hz) ±1.5% rdg. ±5dgt. (50 Hz to 60 Hz) Effect of conductor position Within±5.0% (in any position based on the center of the clamp sensor) Maximum rated voltage to earth 600 Vrms Measurement category III (anticipated transient overvoltage 6000 V), 300 Vrms Measurement category IV (anticipated transient overvoltage 6000 V) Crest factor 2.8 or less (up to 600 A), 1.68 or less (1000 A range) Diameter of 30 mm dia. or less measurable conductor Temperature coefficient Response time Within 0.05 × precision specification / °C Other than 23°C±5°C (73°F±9°F) 1.1 sec. or less 9757 Carrying case, Strap, Instruction manual, CR2032 Lithium battery Power supply control Less than 0.30 A zero-suppression Guaranteed accuracy Approx.20 hours （continuous, no load, at 23°C） Approx. 50 W × 136 H × 26 D mm (1.97”W×5.35”H×1.02”D) Functions • Temperature and humidity for guaranteed accuracy: 23±5°C (73±9°F), 80%RH or less. • Guaranteed accuracy period: 1 year, opening and closing of the Clamp Sensor 10,000 times, whichever comes first. • Guaranteed accuracy range: 2.00 A or above AC current A rms (true rms indication, Auto range） 1000 A Do not allow the instrument to get wet, and do not take measurements with wet hands. This may cause an electric shock. General Specifications Accessories Measurement specification 60 A Follow these precautions to ensure safe operation and to obtain the full benefits of the various functions. Battery low warning (4 levels) Specifications Range Usage Notes Accuracy spec. :±1.5%rdg. ±5dgt. (A) Reading error (± %rdg.)： ± 1.5% of 30.00 A = ± 0.45 A Measurement range :60.00 A (B) Digit error (± dgt.)：± 5dgt. =± 0.05 A (Due to Measurement values :30.00 A minimum resolution of 0.01 A) (C) Total error: (A)+(B) = ± 0.50 A The limit error value for the measured value of 30.00 A is 29.50 A ～ 30.50 A based on the total error (C). Rated supply voltage 3 VDC Indicates that incorrect operation presents an extreme hazard that could result in serious injury or death to the user. This instrument complies with CAT III 600 V, CAT IV 300 V safety requirements. To ensure safe operation of measurement instruments, IEC 61010 establishes safety standards for various electrical environments, categorized as CAT II to CAT IV, and called measurement categories. CAT II: Primary electrical circuits in equipment connected to an AC electrical outlet by a power cord (portable tools, household appliances, etc.) CAT II covers directly measuring electrical outlet receptacles. CAT III: Primary electrical circuits of heavy equipment (fixed installations) connected directly to the distribution panel, and feeders from the distribution panel to outlets. CAT IV: The circuit from the service drop to the service entrance, and to the power meter and primary overcurrent protection device (distribution panel). Using a measurement instrument in an environment designated with a highernumbered category than that for which the instrument is rated could result in a severe accident, and must be carefully avoided. Use of a measurement instrument that is not CAT-rated in CAT II to CAT IV measurement applications could result in a severe accident, and must be carefully avoided. We define measurement tolerances in terms of rdg. (reading) and dgt. (digit) values, with the following meanings: rdg. (reading or displayed value) The value currently being measured and indicated on the measuring instrument. dgt. (resolution) The smallest displayable unit on a digital measuring instrument, i.e., the input value that causes the digital display to show a "1" as the least-significant digit. Example Calculation Maximum input current 1000 A Measurement Procedures Pre-Operation Inspection (Check the following before using the instrument.) • Before using the instrument the first time, verify that it operates normally to ensure that the no damage occurred during storage or shipping. If you find any damage, contact your dealer or Hioki representative. • The clamp sensor or the case shall be free of damage. (If damage has occurred, avoid using the instrument. Use of the instrument under these conditions may result in electric shock.) • The mating portions of the clamp sensor should be free of any scratches or cracks. • Battery power should be near full capacity when power is turned on. (Refer to “Replacing Battery”) • The reading should be around 0 A when no measurements are being made. Open Jaws to Power On. 1. Clamp the tester on the conductor, so that the conductor passes through the center of the clamp core. Replacing Battery Opening and Closing the Display Panel • To avoid electric shock when replacing the battery first disconnect the clamp from the object to be measured. After replacing the batteries, replace the cover and screws before using the instrument. • Use only CR2032 lithium battery. Use of any other battery may result in explosion. • Be sure to insert them with the correct polarity. Otherwise, poor performance or damage from battery leakage could result. • Battery may explode if mistreated. Do not short-circuit, recharge, disassemble or dispose of in fire. • Handle and dispose of batteries in accordance with local regulations. • Keep batteries away from children to prevent accidental swallowing. • To avoid corrosion from battery leakage, remove the batteries from the instrument if it is to be stored for a long time. Adjust the angle of the display panel for better viewing. • Clamp the tester on one wire only. • Put the conductor perpendicular to the sensor, as shown in the sketch. 2. The effective value is shown on the digital display. OK Display example Crest factor • This instrument should only be connected to the secondary side of a breaker, so the breaker can prevent an accident if a short circuit occurs. Connections should never be made to the primary side of a breaker, because unrestricted current flow could cause a serious accident if a short circuit occurs. • To avoid electric shock, do not touch the portion beyond the protective barrier during use. “Crest factor = Waveform peak value/ Internal rated range” is defined for this instrument. There are cases when the accurate measurement cannot be performed with our previous models, because a top portion of the waveform is clipped off due to the rated range if a high crest factor current (= RMS is low and a waveform peak is high) is flowed. This instrument defines the range based on a waveform peak value and measured value so that the accurate measurement can be performed. As for a high crest factor current, its measured value becomes small to the range. If a current exceeding a crest factor of 2.8 is inputted, “OVER”is displayed. This measurement is the out of accuracy guarantee range and the measured value is for reference purpose only. • Be careful to avoid dropping the instrument or otherwise subjecting them to mechanical shock, the Clamp Sensor tip will be damaged, negatively influencing measurement. • Do not input current greater than 1000 A. It will damage the device. at the upper left on the display screen indicates the remaining power level. When the battery approaches the exhausting value, is displayed and a few minutes later, power turns off automatically. When is displayed, the accuracy of measurement value is not guaranteed. Replace the new batteries soon. • At a low or high temperature, the battery life is reduced faster. • The batteries included with the device were installed for factory testing purposes. CR2032 lithium batteries can be purchased at electronics and appliance stores where specialized batteries are sold. Loosen Attaching the strap Make the strap go through the hole just like the Figure shown. Error Display When an error is displayed on the LCD, the HiTester requires repair. Contact your supplier or Hioki representative. Error Display Err0 Position the battery so that the plus (+) side is on top. Battery cover 3291-50 Regarding the MAX value display (1) Press the MAX key once to confirm the MAX value. Whenever a maximum value is updated, the display will be updated. (2) A maximum value will be cleared by pressing【MAX】key and【HOLD】key simultaneously whether when a maximum value is displayed or an instantaneous value is displayed. • As far as the Data Hold mode is on, MAX value cannot be updated. • The MAX value is cleared with FILTER ON/OFF. Filter function • Correct measurement may be impossible for the case of rush current or significantly fluctuating current. • There are cases when error could be larger depending on positioning of sensors and conductor. • When the measuring value exceeds 1000 A the digital display will blink. • Waveforms around 20 Hz or below may be displayed as “----”. • At a low temperature, there are cases when the reading may not be around 0 A without any input signal. But it does not affect measurement. key Err1 Err2 Err3 Previous models To avoid short circuits and potentially life-threatening hazards, never attach the instrument in current measurement mode to a circuit that operates at more than the maximum rated voltage CAT III 600 V, CAT IV 300 V, or over bare conductors. Display Panel • Tighten AC Current Measurement The display can also be reversed by pressing the key. Fix the strap for fall prevention. Replacing the Batteries • Please note that waveforms that include elements outside the frequency characteristic range may not be measured correctly. • Correct measurement may be impossible in the presence of strong magnetic fields, such as near transformers and highcurrent conductors, or in the presence of strong electromagnetic fields such as near radio transmitters. Take measurements with the display panel flipped open in order to view the measurement results more clearly, especially in tight locations, without needing to twist the jaw at an awkward angle. The default setting of Filter is OFF. Please change the setting according to the use. 1. Press and hold the POWER OFF key for 2 seconds or longer to turn off the device's power. 2. Remove the battery cover screws on the back of the device with a Phillips screwdriver, then remove the battery cover. 3. Replace with a new battery. When inserting a new battery (CR2032 lithium battery), be sure to position the polarities in their proper orientations. 4. Replace the battery cover and fasten the screws. CALIFORNIA, USA ONLY This instrument contains a CR Coin Lithium Battery which contains Perchlorate Material - special handling may apply. See www.dtsc.ca.gov/hazardouswaste/perchlorate Meaning Internal ROM Error Calibration Data Faulty Remedial Action Repair is necessary. Contact your supplier or Hioki representative.