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Summary of Contents for Kyoritsu Electrical Instruments Works, Ltd. 4200
- Page 1 INSTRUCTION MANUAL MODEL4200 KEW4202 DIGITAL EARTH CLAMP TESTER MODEL 4200/KEW 4202 KYORITSU ELECTRICAL INSTRUMENTS WORKS， LTD.
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Page 2: Table Of Contents
Contents 1. Safety warnings ..................... 1 2. Features ...................... 3 3. Specification .................... 4 4. Instrument layout ................... 6 5. Measurement principle ................... 7 6. Getting started .................... 9 7. Measuring method .................. 10 7-1 Normal measurement of current ............ 11 7-2 Measurement of balance leakage current ......... 11 7-3 Measurement of earth resistance ............ 12 8. Other functions .................... 13 8-1 Auto power-off function ................ 13 8-2 Data hold function ................. 13 8-3 Buzzer function .................. 13 8-4 Backlight function ................... 13 8-5 Memory function .................. 14 8-6 Bluetooth Communication Function (KEW4202 only) ....... 15 9. Battery replacement .................. 17 10. Pairing with Bluetooth compatible devices (KEW4202) ...... 18 11. Features of KEW Smart (KEW4202) ............ 19... -
Page 3: Safety Warnings
1. Safety Warnings This instrument has been designed, manufactured and tested according to IEC 61010: Safety requirements for Electronic Measuring apparatus, and delivered in the best condition after passing quality control tests. This instruction manual contains warnings and safety procedures which have to be observed by the user to ensure safe operation of the instrument and to maintain it in safe condition. Therefore, read through these operating instructions before using the instrument. WARNING R ead through and understand the instructions contained in this manual before using the instrument. - Page 4 DANGER N ever make measurement on a circuit in which the electrical potential exceeds AC300V. D o not make measurement when thunder is rumbling. Stop measurement and take off the instrument from the object under test. D o not attempt to make measurement in the presence of flammable gasses. O therwise, the use of the instrument may cause sparking, which can lead to an explosion. T o avoid electrical shock by touching the equipment under test or its surroundings, be sure to wear insulated protective gear.
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Page 5: Features
2. Features This instrument is a digital clamp-on earth resistance tester, and it is used in multi- earthed systems. Can measure the earth resistance by simply clamping around the earthed wires. This instrument also equips AC current function to measure current up to 30A same as our traditional leakage clamp meters. A single earthing cannot be measured. (only for multiple-earthing system) Wide measuring range (Auto-ranging) Earth/ground resistance Max. 1500Ω Min. resolution 0.01Ω AC current Max. 30A Min. resolution 0.1mA Noise check function A function to detect current, which effects on an earth resistance measurement and display the NOISE symbol on the LCD. True RMS Accurate true RMS readings of AC current with distorted waveform. Auto power-off function A function to prevent the instrument from being left turned on and conserve battery power. -
Page 6: Specification
3. Specification Measuring range and accuracy Function Range Resolution Measuring range Accuracy 20Ω 0.01Ω 0.00〜20.99Ω ±1.5%±0.05Ω 16.0〜99.9Ω ±2%±0.5Ω Earth 200Ω 0.1Ω 100.0〜209.9Ω ±3%±2Ω resistance 160〜399Ω ±5%±5Ω 1Ω (Auto-ranging) 1500Ω 400〜599Ω ±10%±10Ω 10Ω 600〜1580Ω ※ ±2%±0.7mA 100mA 0.1mA 0.0〜104.9mA AC current(AC) (sine wave) (50/60Hz) 1000mA 80〜1049mA ±2% 0.01A 0.80〜10.49A (Auto-ranging) - Page 7 Auto power-off T urns power off about 10 minutes after the last button operation. Applicable standards IEC61010-1, IEC61010-2-030 (CAT. IV 300V Pollution degree2) IEC61010-2-032 IEC61326-2-2 (EMC standard) Environmental standard EN50581 Monitoring and control instruments External communication Bluetooth Ver2.1+EDR Class2 method Withstand voltage AC5160Vrms/ 5 seconds B etween the Transformer jaws fitted parts and Case enclosure (except for jaws) Insulation resistance 50MΩ or more at 1000V ...
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Page 8: Instrument Layout
4. Instrument layout Name of each parts and buttons (for MODEL4200 and KEW4202) 1 Transformer jaw 2 Trigger 3 Backlight button Switches on/off the backlight. 4 Function button Switches ACA/ Earth resistance functions. 5 Memory mode button Check the measured value by Data number. -
Page 9: Measurement Principle
5. Measurement principle This instrument can measure the earth resistance to earth in multi-earthed system. Let's regard earth resistance under test as Rx, and the other earth resistances as , R , …Rn. Of these earth resistances, R , R , …Rn can be considered that they are connected in parallel. And can be regarded as a combined resistance Rs. The Rs can be regarded small enough against Rx since a combined resistance consists of several resistances. Following is an equivalent circuit diagram of this circuit. ̶ 7 ̶... - Page 10 By applying the Voltage (V) to the circuit from the Transformer jaw (CT1), current I is (shall be flowed) flowed corresponding to the earth resistance. R can be put out by the calculation after detecting the current with the other Transformer jaw (CT2). In this case, R displayed in this instrument can be regarded as Rx because Rs can be regarded small enough against Rx. CAUTION This instrument is not supporting the measurement for the locations with following earth systems. S ingle-earth that is not connected to other earths. (Lightning rod, etc.) E arth on which a current over 2A is measured at AC current function of this instrument. Earth with a larger earth resistance than an earth resistance of testing. Earth with earth resistance over 1500Ω. Precision measurement shall be performed with our Earth resistance tester: M-4102A or M-4105A for the measurement of single-earthed wire. M-4102A ̶ 8 ̶...
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Page 11: Getting Started
6. Getting started CAUTION This instrument performs self-calibration for about 3 seconds when it is turned on. (" " is displayed on the LCD.) Do not clamp onto any conductor or open the jaws in this period. Otherwise, inaccurate measurement may occur. (1) C heck the battery voltage W hen nothing is displayed on the LCD, press the power button and turn on the instrument. Battery voltage is enough when indication is clear and the " " symbol is not displayed on the LCD after turning on the instrument. F ollow the procedure described in 9. Battery replacement and replace the batteries with new ones when any of following symptoms is noted. Otherwise, accurate measurement and proper saving cannot be ensured. -
Page 12: Measuring Method
7. Measuring method DANGER N ever make measurement on a circuit in which the electrical potential exceeds AC300V. T ransformer jaws are made of metal and their tips are not completely insulated. Be especially careful about the possible shorting where the equipment under test has exposed metal parts. -
Page 13: Normal Measurement Of Current
7-1 Normal measurement of current * Press the Function button and select the ACA function. * C onfirm the displayed unit is " mA ", and the " MEM " is not displayed at the upper left on the LCD. * P ress the trigger to open the Transformer jaws, and close them over one conductor only. * Measured current value is displayed on the LCD. ( Earth leakage current that flows through an earthed wire can be measured by this method.) 7-2 Measurement of balance leakage current * Press the Function button and select the ACA function. * ... -
Page 14: Measurement Of Earth Resistance
7-3 Measurement of earth resistance CAUTION F ollow the procedure described in "7-1 Normal measurement of current" and measure the current flowing on the earthed wire prior to the measurement of earth resistance. I n case that the " " symbol is displayed at the upper right of the LCD, it means that a great error would be included in the measured result. ... -
Page 15: Other Functions
8. Other functions 8-1 Auto power-off function T his function is to prevent the instrument from being left turned on and conserve battery power. The instrument automatically turns off about 10 minutes after the last button operation. T o return to the normal mode, press the Power button again and turns on the instrument. ◇ The buzzer sounds before the instrument turns off. ◇ To disable the auto power-off function, follow the procedure below. (1) T urn on the instrument by pressing the Power button with the Data hold button pressed down. Then release the Power button only. (2) T he instrument is turned on, and " ... -
Page 16: Memory Function
8-5 Memory function This function is to save and display the measurement results. Saving the measurement results (1) S elect any data number (from 1 to 100) by using the Cursor button or at ACA or Earth resistance function, and save the measurement results. ◇ W hen the Cursor button is being pressed down, the number switches quickly. -
Page 17: Bluetooth Communication Function (Kew4202 Only)
8-6 Bluetooth Communication Function (KEW4202 only) K EW4202 can perform data communication between Android devices via Bluetooth communication. Notes on using Bluetooth function: T his function is not available on MODEL4200 but available on KEW4202. B efore starting to use this function, download the special application KEW Smart from the Internet site. S ome of the functions are available only while connected to the Internet. For further details, please refer to ... - Page 18 Set-up: F irst, set a Bluetooth connection (pairing) from an Android device. For further details, please refer to the instruction manual for the Android device, Help for KEW Smart or 10. Pairing with Bluetooth compatible devices . Communication with Android devices: M easurement results of KEW4202 can be displayed on Android devices via Bluetooth ...
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Page 19: Battery Replacement
9. Battery replacement WARNING I n order to avoid possible shock hazard, take off the instrument from the conductor under test and turn off the instrument before trying to replace the batteries. CAUTION D o not mix new and old batteries. Never use the different kinds of batteries at the same time. I nstall batteries in correct polarity as marked inside. W hen the battery voltage warning symbol " " is displayed on the upper left of the LCD, replace the batteries. Note that the display blanks and " ... -
Page 20: Pairing With Bluetooth Compatible Devices (Kew4202)
10. Pairing with Bluetooth compatible devices (KEW4202) It is necessary to perform the pairing procedure to connect KEW4202 and Android devices via Bluetooth communication. I f the symbol is displayed on the LCD of KEW4202, replace the batteries with new ones before performing the pairing procedure. (1) Power on KEW4202. (2) P ower on the Android device, and find the Setting menu. Look for the Bluetooth setting in the Wireless Setting menu. ... -
Page 21: Features Of Kew Smart (Kew4202)
11. Features of KEW Smart (KEW4202) Remote checking of measurements is possible without accessing KEW4202 using the special Android application KEW Smart . The application KEW Smart is available on download site for free. (An Internet access is required.) Please note that communication charge is incurred separately for downloading applications and using special features of them. For your information, KEW Smart is provided on-line only. Features of KEW Smart: R emote checking of measurement is possible (earth/ground resistance and AC current values) ... - Page 22 MEMO ̶ 20 ̶...
- Page 23 MEMO ̶ 21 ̶...
- Page 24 DISTRIBUTOR Kyoritsu reserves the rights to change specifications or designs described in this manual without notice and without obligations. 8-15 92-2088B...
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