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Summary of Contents for Kyoritsu Electrical Instruments Works TRUE RMS KEW FORK 2300R
- Page 1 Instruction Manual AC/DC FORK CURRENT TESTER KEW FORK MODEL 2300R KYORITSU ELECTRICAL INSTRUMENTS WORKS, LTD.,...
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Page 2: Safety Warnings
1. Safety Warnings This instrument has been designed and tested according to IEC Publication 61010: Safety Requirements for Electronic Measuring Apparatus. This instruction manual contains warnings and safety rules which must be observed by the user to ensure safe operation of the instrument and to retain it in safe condition. Therefore, read through these operating instructions before starting using the instrument. WARNING ●Read through and understand instructions contained in this manual before starting to use the instrument. -
Page 3: Specification
3. Specification AC current 〜A Accuracy CF(Crest factor) Measuring range Range ±2.0％rdg±５dgt（50／60Hz） CF≦２ ０〜100A ±3.0％rdg±５dgt（50／60Hz） ２＜CF≦2.5 DC current Range Measuring range Accuracy ０〜±100A ±2.0％rdg±５dgt AC voltage 〜V Action Range Measuring range AC300V or less Normal condition : Lo At voltage detecting(single wire AC80V or more) : Hi Note) NCV range is calibrated to detect the voltage, where non-grounded single wire, AC80V or more. However, detecting sensitivity may be affected by the absence of grounded or non-grounded metal tube or metal case. Also it may be affected in the place ... -
Page 4: Instrument Layout
Reference *Effective Value (RMS) Most alternating currents and voltages are expressed in effective values, which are also referred to as RMS (Root-Mean-Square) values. The effective value is the square root of the average of square of alternating current or voltage values. Many clamp meters using a conventional rectifying circuit have "RMS" scales for AC measurement. The scales are, however, actually calibrated in terms of the effective value of a sine wave though the clamp meter is responding to the average value. The calibration is done with a conversion factor of 1.111 for sine wave, which is found by dividing the effective value by the average value. These instruments are therefore in error if the input voltage or current has some other shape than sine wave. *CF (Crest Factor) is found by dividing the peak value by the effective value. Examples: Sine wave: CF=1.414 Square wave with a 1: 4 duty ratio: CF=2 4. INSTRUMENT LAYOUT Function Selector Switch Display Fork Jaws Hand Strap... - Page 5 5. Preparation (1) Check battery voltage Set the Function selector switch to the position other than OFF position. Battery Voltage is enough if indications are displayed clearly and "BATT" mark is not displayed on the LCD. If "BATT" mark is indicated or no indication on the LCD, replace batteries with new one according to battery replacement procedures shown in clause 8 in this document. CAUTION ●Indications may not being displayed on the LCD despite the function selector switch is at the position other than OFF position. This is because power-off function operated automatically and the instrument turned off. Power off function can be released by turning the function selector switch to OFF, and then set it to the range on which you would like to make a measurement. If LCD still blank, batteries are completely exhausted. Please replace batteries. (2) Check the function selector switch is set to the appropriate range. And also check data hold function is not enabled. If inappropriate range is selected, desired measurement cannot be made.
- Page 6 Note) For the measurement of AC current, zero adjustment, which is required for the measurement of DC current, is not necessary. Current flowing direction has no relation to the indication polarity. 6-2 Non contact voltage detection(NCV) This function is to check the presence of voltage without touching wires or electrodes directly. Also can check the presence of AC voltage in cable, outlet, fuse and circuit breaker. [Details] While voltage is applied to a cable or outlet, the electric field depending on the voltage is generated. This instrument detects the generated electric field, and verifies the presence ...
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Page 7: Other Functions
(1) 100V mode Sensitivity on this mode is set sharp, therefore, the presence of AC voltage can be checked only by placing the instrument closer to the measured object, such as an outlet, a plug and parallel cords, as shown in figure. (2) 200V mode Sensitivity on this mode is set dull, so the earth side and non-earth side of 100V cable way can de verified. (Where cables are crowded, such as in a distribution board, earth side could not be verified.) Also can check the presence of AC voltage in 200V cable way, plug, outlet, fuse and circuit breaker. 7. Other functions 7-1 Auto power off function This function causes the instrument to automatically enter the power-off mode about 10min after the last function selector switch operation.
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