―――――――――――――――――――――――――― 2.2.1 絶縁抵抗の測定方法 電源側 (1次側) 負荷側 (2次側) 注意:測定ラインのブレーカ、しゃ断器は必ず "切" にします。 ファンクションスイッチを発生電圧のいずれかにします。 3452-11:100 V / 50 V / 25 V 3452-12:500 V / 250 V / 125 V 3452-13:1000 V / 500 V / 250 V 黒のアースプローブを接地側に接続します。 赤のラインプローブを被測定物に接続します。 MEASURE スイッチを押します。 (連続測定する場合はスイッチを引き起こします) 指針が安定してから表示を読み取ります。 ―――――――――――――――――――――――...
Page 41
Contents Introduction Inspection Safety Notes Notes on Use viii Chapter 1 Names and Functions of Parts Chapter 2 Measurement 2.1 Preparing for Measurement 2.2 Insulation Resistance Measurement 2.2.1 Measurement Method 2.2.2 Reading the Value 2.2.3 Measurement Terminal Voltage Characteristics 2.3 Discharging Function 2.4 AC Voltage Measurement 2.5 Battery Check 2.6 Luminous Scales...
――――――――――――――――――――――――――― Introduction Thank you for purchasing the HIOKI 3452 MΩ HiTESTER. To obtain maximum performance from the instrument, please read this manual first, and keep it handy for future reference. Inspection When you receive the instrument, inspect it carefully to ensure that no damage occurred during shipping.
Page 44
――――――――――――――――――――――――――― Using the carrying case ・Opening the cover Remove the part of the top surface where "OPEN" is written. Turn the cover you have removed round to the back, and attach for use. ・Storaging the Instruction Manual Can be put under the 3452. ――――――――――――――――――――――――...
――――――――――――――――――――――――――― Safety Notes DANGER 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. Be certain that you understand the instructions and precautions in the manual before use.
Page 46
――――――――――――――――――――――――――― Safety symbols ・ 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. ・ In the manual, the symbol indicates particularly important information that the user should read before using the instrument.
Page 47
――――――――――――――――――――――――――― The following symbols in this manual indicate the relative importance of cautions and warnings. Indicates that incorrect operation presents an extreme hazard that could DANGER result in serious injury or death to the user. Indicates that incorrect operation presents a significant hazard that could WARNING result in serious injury or death to the user.
Page 48
――――――――――――――――――――――――――― Measurement categories (Overvoltage categories) This instrument complies with CAT III safety requirements. To ensure safe operation of measurement instruments, IEC 61010 establishes safety standards for various electrical environments, categorized as CAT I to CAT IV, and called measurement categories. These are defined as follows.
Page 49
――――――――――――――――――――――――――― Higher-numbered categories correspond to electrical environments with greater momentary energy. So a measurement device designed for CAT III environments can endure greater momentary energy than a device designed for CAT II. Using a measurement instrument in an environment designated with a higher- numbered category than that for which the instrument is rated could result in a severe accident, and must be carefully avoided.
If you find any damage, contact your dealer or Hioki representative. Before using the instrument, make sure that the insulation on the test probes is undamaged and that no bare conductors are improperly exposed.
Page 51
――――――――――――――――――――――――――― DANGER The maximum input voltage and maximum rated voltage to earth are 150 Vrms (3452-11) and 500 Vrms (3452-12, 3452-13). Exceeding these limits can damage the instrument or cause a serious accident. On the test probe there is a label stating 600 V, however this is only the probe’s maximum rated voltage, and is not the maximum rated voltage...
Page 52
――――――――――――――――――――――――――― WARNING Do not allow the instrument to get wet, and do not take measurements with wet hands. This may cause an electric shock. To avoid electric shock when replacing the batteries, first disconnect the test probes from the object to be measured. After replacing the batteries, replace the cover and screws before using the instrument.
Page 53
――――――――――――――――――――――――――― CAUTION ・ 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. ・ Calibration and repair of this instrument should be performed only under the supervision of qualified technicians knowledgeable about the dangers involved.
Page 54
――――――――――――――――――――――――――― When refreshing the luminous scale outdoors, NOTE keep the meter in the shade. ―――――――――――――――――――――――― Notes on Use...
――――――――――――――――――――――――――― Chapter 1 Names and Functions of Parts Front Panel MEASURE switch Press to measure insulation resistance or check batteries. ―――――――――――――――――――――――― Chapter 1 Names and Functions of Parts...
Page 56
――――――――――――――――――――――――――― Function switch Select the measurement voltage for insulation resistance testing or the battery check function. Display This scales are marked with a phosphorescent paint. Resistance scale 3452-11: 100/50/25 V 3452-12: 500/250/125 V 3452-13: 1000/500/250 V AC voltage scale Battery effective range Indicator needle ADJUST (Zero adjuster) ――――――――――――――――――――――――...
Page 57
――――――――――――――――――――――――――― LINE terminal (Line measurement terminal) Connect the line probe (red). EARTH terminal (Earth measurement terminal) Connect the earth probe (black). Fixing screw for the battery cover Battery cover ―――――――――――――――――――――――― Chapter 1 Names and Functions of Parts...
Page 58
――――――――――――――――――――――――――― ―――――――――――――――――――――――― Chapter 1 Names and Functions of Parts...
――――――――――――――――――――――――――― Chapter 2 Measurement 2.1 Preparing for Measurement Before use perform the following procedures. 1. Zero adjustment First turn the MEASURE switch off, then turn the zero adjuster (ADJUST) with a screwdriver so that the needle is at the center of the infinity mark (∞).
――――――――――――――――――――――――――― 2.2 Insulation Resistance Measurement To investigate conduction and the insulation of the object, the instrument will measure insulation resistance. In preparing to measure, there is a need to select the voltage to be applied to the object to be measured. WARNING Do not attempt to measure insulation resistance on a live line.
Page 61
――――――――――――――――――――――――――― WARNING Never touch the object being measured immediately after measuring. There is a danger of electric shock from the charge accumulating during high voltage testing. Discharge the subject conductor after measurement. (Refer to Section 2.3, "Discharging function.") Before taking a measurement, check the position of the function switch.
Page 62
――――――――――――――――――――――――――― ・ Insulation resistance is the ratio of leakage NOTE current to applied voltage, and is therefore unstable. Depending on the circuit being measured the needle may not stabilize, but this is not a meter malfunction. ・ While measuring there may be an oscillator noise from the meter, but this is not a malfunction.
――――――――――――――――――――――――――― 2.2.1 Measurement Method Source (primary) 3452-11: 100 V, 50 V, 25 V 3452-12: 500 V, 250 V, 125 V 3452-13: 1000 V, 500 V, 250 V Load (secondary) Always turn off the breaker of the measurement line. Use the function switch to select the measurement voltage.
――――――――――――――――――――――――――― 2.2.2 Reading the Value To read off the resistance value, choose the one of the outer three scales with the measurement voltage selected by the function switch written at each end. (The units are MΩ.) Example When selecting the 100 V range using the 3452-11.
――――――――――――――――――――――――――― 2.3 Discharging Function When measuring an insulation resistance that contains a capacitance element, a charge proportional to the measurement voltage accumulates, and if undischarged could lead to an electric shock accident. After measurement carry out the following procedure. 1. Without removing the test probes from the item being measured, turn the MEASURE switch off.
――――――――――――――――――――――――――― 2.4 AC Voltage Measurement The AC voltage of commercial electrical sources can be measured. Before measuring the insulation resistance, the instrument can be used to make sure the object to be measured is not a live power line. DANGER Probe should only be connected to the secondary side of a breaker, so the breaker can prevent an accident if a short circuit occurs.
Page 68
――――――――――――――――――――――――――― CAUTION Never press the MEASURE button while measuring voltage. Doing so could damage the instruments connecting. Source (primary) Do not press the MEASURE button. Load (secondary) The AC voltage can be measured in any setting position of the function switch. Connect the black earth probe to the ground.
――――――――――――――――――――――――――― 2.5 Battery Check WARNING Before taking a measurement, check the position of the function switch. If the function switch setting is incorrect, it outputs a voltage for measuring insulation resistance between measurement, which may be dangerous. The battery check function places the heaviest NOTE current drain.
――――――――――――――――――――――――――― 2.6 Luminous Scales CAUTION If the instrument is exposed to direct sunlight for a long time, it may be deformed. When using it outdoors, as far as possible keep in the shade. Even if not directed toward the sun, the scale absorbs heat rapidly.
――――――――――――――――――――――――――― ・ The position of the needle remains visible for NOTE slightly longer than the scale is legible. ・ When the user moves from a light place to a dark place, because of the time eyes take to adjust to the light, the scale may not be legible immediately.
Page 72
――――――――――――――――――――――――――― 9288 BREAKER PIN Attach this to the tip of the line probe or pin type earth probes. It allows the tip to be extended, when otherwise it would be too short to make a measurement. (This item does not conform to IEC 61010.) ――――――――――――――――――――――――...
――――――――――――――――――――――――――― Chapter 3 Specifications 3.1 General Specifications 。 0 to 40℃ (32 to 104 Operating temperature and humidities 90% RH max (with no condensations) 。 Storage temperature -20 to 50℃ (-4 to 122 90% RH max and humidities (with no condensations) Indoors, altitude up to 2000 m Operating Environment...
Page 74
――――――――――――――――――――――――――― Within 3 s (∞→center value, ∞→ Response time 0 MΩ) For center value, refer to the specifications of each instrument. When using the 3452-13, 1000 V range, it may take a little time to indicate more than 1000 MΩ. Power source Rated power voltage: 1.5 V DC×4 (Voltage fluctuations of 10% from...
――――――――――――――――――――――――――― 9292 TEST PROBE Accessories 9384 CARRYING CASE Instruction Manual R6P manganese battery ×4 Options 9293 PIN TYPE EARTH PROBE 9288 BREAKER PIN 3.2 Specifications of Each Unit Measurement tolerances are guaranteed at 。 23±5℃(73±9 F), 90% RH or less, no condensation, for 1 year.
Page 77
――――――――――――――――――――――――――― 3452-12 Rated measurement voltage (V DC) Maximum effective reading (MΩ) Center scale reading (MΩ) Allowance of resistance measurement 0.02 - 10 0.05 - 20 0.1 - 50 1st effective measurement range (MΩ) ±5% of scale reading 10 - 20, 20 - 50, 50 - 100, 2nd effective...
Page 78
――――――――――――――――――――――――――― AC voltage measurement AC voltage scale 0 to 500 V, ±5%(=±25 V) of maximum scale value (50/60 Hz) and allowance Input resistance 90 kΩ min Maximum rated voltage 500 V AC to earth Input error protection for 600 V AC (overvoltage protection) 10 seconds 3452-13...
Page 79
――――――――――――――――――――――――――― 1 to 1.2 times of rated Open-circuit voltage (when no load is applied) measurement voltage (open circuit terminal voltage) Lower limit measurement resistance value to be 0.25 maintained rated measurement voltage (MΩ) Rated measurement current (mA) 1 - 1.2 1 - 1.2 0.5 - 0.6 (current to be maintained...
――――――――――――――――――――――――――― Chapter 4 Maintenance and Service 4.1 Replacing of Batteries WARNING To avoid electric shock, turn the MEASURE button off and disconnect the probe before replacing the batteries. After replacing the batteries, replace the cover and screws before using the instrument. Do not mix old and new batteries, or different types of batteries.
Page 82
――――――――――――――――――――――――――― To avoid corrosion from battery leakage, NOTE remove the batteries from the instrument if it is to be stored for a long time. Fixing screw Battery cover 3452 Rear View 1. Remove the probes from the instrument. 2. Remove the screw. 3.
Hioki cannot be responsible for damage that occurs during shipment. ―――――――――――――――――――――――― Chapter 4 Maintenance and Service...
Page 84
――――――――――――――――――――――――――― ―――――――――――――――――――――――― Chapter 4 Maintenance and Service...
Page 87
HIOKI 3452 MΩ HiTESTER Instruction Manual Publication date: September 2008 Revised edition 13 Edited and published by HIOKI E.E. CORPORATION Technical Support Section All inquiries to Sales and Marketing International 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...
Page 88
HEAD OFFICE 81 Koizumi, Ueda, Nagano 386-1192, Japan TEL +81-268-28-0562 / FAX +81-268-28-0568 E-mail: os-com@hioki.co.jp URL http://www.hioki.com/ HIOKI USA CORPORATION 6 Corporate Drive, Cranbury, NJ 08512, USA TEL +1-609-409-9109 / FAX +1-609-409-9108...
Need help?
Do you have a question about the MO HiTESTER 3452 and is the answer not in the manual?
Questions and answers