INSTRUCTION MANUAL DISTRIBUTOR Kyoritsu reserves the rights to change specifications or designs described in this manual without notice and without obligations. KYORITSU ELECTRICAL INSTRUMENTS WORKS, LTD. Digital Earth Resistance Tester MODEL 4105A No.5-20,Nakane 2-chome, Meguro-ku, Tokyo 152-0031 Japan Phone :(03) 3723-0131 Fax : (03) 3723-0152 URL : http://www.kew-ltd.co.jp E-mail : info@kew-ltd.co.jp Factories : Uwajima & Ehime 01-07 KYORITSU ELECTRICAL INSTRUMENTS WORKS, LTD.
CONTENTS 1. Safety Precautions …………………………………………………………… 1 2. Features ………………………………………………………………………… 4 3. Specifications …………………………………………………………………… 5 4. Layout Diagram ………………………………………………………………… 8 5. Preparation for Measurement ………………………………………………… 9 5-1 Battery Voltage Check …………………………………………………… 9 5-2 Connecting Test Probes ………………………………………………… 9 6.
DANGER is reserved for conditions and actions that are likely to cause serious or fatal injury. WARNING is reserved for conditions and actions that can cause serious or fatal injury. CAUTION is reserved for conditions and actions that can cause minor injury or instrument damage. CAUTION Make sure that the test probe are securely connected to the terminal of the instrument. Be sure to set the range selector switch to the OFF position after use.
2. Features 3. Specifications MODEL 4105A is an earth resistance tester for testing power distribution lines, in-house wiring system, electrical appliances etc. It also has an earth voltage range for earth voltage measurement. Measuring Range and Accuracy (at 23 Range Earth Voltage Designed to safety standard IEC 61557. Dust and drip proof construction in conformity with IEC 60529 (IP54). Measurement can be made even under adverse weather conditions. Earth Resistance Measuring Range 0 - 199.
Maximum Operating Error Power Source Operating error (B) is an error obtained within the rated operating conditions, and calculated with the intrinsic error (A), which is an error of the instrument used, and the error (Ei) due to variations.
4. Layout Diagram 5. Preparation for Measurement 5-1 Battery Voltage Check Turn on the instrument. If the display is clear without low battery symbol " " showing, battery voltage is sufficient. If the display blanks or " " is indicated, replace the batteries according to section 7 for Battery Replacement. 5-2 Connecting Test Probe Insert the plug of the probe securely into the terminals of the instrument. Loose connection may result in inaccurate measurements. 6.
6-2 Precise Measurement (with Test Probe M-7095) q Test probe connection Stick the auxiliary earth spikes P and C into the ground deeply. They should be aligned at an interval of 5-10m from the earthed equipment under test. Connect the green wire to the earthed equipment under test, the yellow wire to the auxiliary earth spike P and the red wire to the auxiliary earth spike C from terminals E, P and C of the instrument in order. Note : 20Ω when the earth resistance is low.
Note : When the simplified measurement probes are not used, short P and C terminals. DANGER Please be sure to use a voltage detector to check a common earth of commercial power supply. Do not use the instrument to check a common earth of commercial power supply.
7. Battery Replacement 8. Notes on Housing Case & Accessories DANGER Never attempt to open the battery compartment cover, if the outer 8-1 Case Lid Case lid can be fit under the housing case while making measurement. surface of the instrument is wet. Never attempt to replace batteries while making measurement. To avoid shock hazard, turn the instrument off and disconnect the test leads and the probes from the instrument before opening the battery compartment cover.
9. Before Sending for Service If this instrument should fail to operate correctly, return it to your nearest distributor stating the exact nature of the fault. Before returning the instrument follow the trouble-shooting guide shown below. 10. Service If this instrument should fail to operate correctly, return to your nearest distributors stating the exact nature of the fault. If the instrument does not turn on; Check whether batteries are missing or they are installed incorrect polarity.
