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Related Manuals for Kyoritsu Electrical Instruments Works, Ltd. KEW 3124A
Summary of Contents for Kyoritsu Electrical Instruments Works, Ltd. KEW 3124A
- Page 1 INSTRUCTION MANUAL HIGH VOLTAGE INSULATION TESTER KEW 3124A...
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Page 3: Table Of Contents
CONTENTS 1. SAFETY WARNINGS ···································································· 1 2. FEATURES ················································································· 4 3. SPECIFICATIONS ········································································ 5 4. INSTRUMENT LAYOUT ································································ 9 5. PREPARATIONS FOR TESTS ······················································ 10 6. OPERATING INSTRUCTIONS ······················································ 12 7. BATTERY CHARGING ································································ 17 8. BATTERY REFRESH ·································································· 20 9. -
Page 4: Safety Warnings
1. SAFETY WARNINGS ○ This instruction manual contains warnings and safety rules which must 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. # DANGER ●... - Page 5 # DANGER ● Do not attempt to make measurements in the presence of flammable gasses. Otherwise, the use of the instrument may cause sparking, which can lead to an explosion. ●Never attempt to use the instrument if its surface or your hand is wet. ●...
- Page 6 # CAUTION ● Before starting a measurement, confirm that the Function switch is at an appropriate position. ● Set the Function switch to “OFF” position after use. Remove the batteries if the instrument is to be stored and will not be in use for a long period.
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Page 7: Features
2. FEATURES ● Suited for heavy duty electrical maintenance and servicing of industrial installations, cables, transformers, generators and switchgears where high voltage insulation tests are required. ● Measures high voltage insulation resistance up to 100GΩ at a variable voltage between 1kV and 10kV. ●... -
Page 8: Specifications
3. SPECIFICATIONS ● High Voltage Range at Variable Test Voltage Nominal Test Voltage 1kV-10kV/DC (Variable) 0-1.6GΩ/1-100GΩ Measuring Range (Auto ranging) 0.05-50GΩ ±10% of rdg ±1 % of scale length Insulation (When test voltage is below Resistance Other Ranges Accuracy 2kV, the accuracy is not guaranteed at 50-100GΩ) Output ±2% of set value ±2dgt... - Page 9 Current Consumption: 80mA approx. in stand-by state, 300mA max. in operation As battery voltage lowers, the illuminating Battery Battery Alarm: Alarm (BATT. ALARM) alternates its colour to Green, Yellow and Red. Threshold voltages between Green and Yellow, and Yellow and Red are approximately 9.6V and 9.1V respectively.
- Page 10 Power Source: Eight Ni-MH rechargeable AA size batteries, HR15/51 (1) Ratings Rated capacity min. 1900mAh (at discharge rate 0.1CmA) Nominal voltage 1.2V (2) Charge conditions See section 7 for Battery charging. (3) Storage conditions At a temperature of -20℃ to +30℃ and low humidity, where there are no corrosive gasses (4) Battery life The number of tests is not less than 500,...
- Page 11 KEW3124A...
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Page 12: Instrument Layout
4. INSTRUMENT LAYOUT ①Line Probe ⑪Output Voltage ②Guard Terminal and Set Voltage Indicator ③Earth Terminal ⑫Meter Movement Zero Adjust ④Battery Alarm ⑬Terminal for Battery Charging ⑤Battery Charging Indicator ⑭Output Terminal for Recorder ⑥High Scale ⑮Test Button ⑦Low Scale ⑯Function Switch ⑧1kV/ 100MΩ... -
Page 13: Preparations For Tests
5. PREPARATIONS FOR TESTS 5-1 Mechanical Zero Adjustment With the Function switch set to the OFF position, check the meter pointer lines up with the "∞" mark on the scale. If not, adjust it by rotating the Meter Movement Zero Adjust with a small screwdriver. 5-2 Test leads connection Connect the Earth lead (black) to the Earth Terminal of the instrument. - Page 14 # CAUTION ● The internal over-discharging prevention circuit will be active when the battery voltage drops to 9.0 ‒ 8.5 V or less and the measurement functions will be completely disabled. If the Battery Alarm is not lit or the digital display does not operate, confirm that the batteries are installed correctly and charge the batteries.
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Page 15: Operating Instructions
6. OPERATING INSTRUCTIONS 6-1 Checking for absence of voltage The circuit breaker of the equipment (circuit) under test must be turned off. Use a high voltage detector and verify there is no voltage presence before making a measurement. 6-2 Insulation tests with 1kV - 10kV/100GΩ range # DANGER ●... - Page 16 (1) Make sure that the Function switch is set to the OFF position, the Test button is not locked down and the Function switch is set to OFF position. (2) Connect the clip of Earth lead (black) to the earth point of the circuit, equipment or cable under test.
- Page 17 # DANGER ● Never ground yourself when conducting electrical tests. Do not touch exposed metal pipes, outlets, fixtures, etc., which might be at ground potential. Keep you isolated from ground by using dry clothing, rubber shoes, rubber mats, or any approved insulating material. ●...
- Page 18 6-3 Insulation tests with 1kV/ 100MΩ range # DANGER ● Confirm that no electrical charges exist on the circuit under test before a measurement by using a high voltage detector. ●Put on a pair of insulated gloves for high voltage. ●...
- Page 19 6-4 How to use the Guard Terminal In cable insulation tests, wind a conductive wire around insulation of the cable under test and connect it to the Guard terminal with the Guard lead as per Fig. 2. This is to move out the surface leakage resistance of the cable insulation to make the test results accurate.
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Page 20: Battery Charging
7. BATTERY CHARGING # DANGER ●Do not open the battery compartment cover if the instrument is wet. ● Never replace batteries during a measurement. To avoid a risk of electrical shock, do not connect the test leads to the equipment under test and set the Function switch to OFF when replacing the batteries. - Page 21 (2) If the instrument does not turn operative with the Function switch set to the H.V. SET position, charge the batteries according to section 7-2. Proper temperature for battery charging ● Temperatures between 10℃ and 30℃ are optimum and recommended for battery charging.
- Page 22 Rating and output polarity of battery charger ●Use the battery charger Model 8075 designed for KEW3124A. ● Either of center positive or center negative output plug (ø5 x 2.1 x 9. mm) fits into KEW3124A. Center negative and center positive; both are useable. CAUTION: For the old model, Model 3124, only the charger with center negative can be used.
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Page 23: Battery Refresh
8. BATTERY REFRESH 8-1 How to refresh the rechargeable batteries Incorporated Ni-MH batteries serve for more than 500 charge-discharge cycles. But their capacity may fairly reduce before their lives wear out. You can refresh them in the following steps. 1. Set the Function switch to H.V. SET. Do not press the Test button. 2. -
Page 24: Battery Replacement
9. BATTERY REPLACEMENT # CAUTION ● Use the specified type of Ni-MH battery only; otherwise, batteries may not be charged correctly or the instrument may be damaged. ● If batteries other than those specified in this document would be used, charge them with the same brand s battery charger and then insert the batteries in KEW3124A. -
Page 25: Battery Handling Precautions
10. BATTERY HANDLING PRECAUTIONS In order to take full advantage of the properties of Ni-MH batteries and also to prevent problems resulting from improper use, please note the following points. 10-1 Environmental condition After removing the batteries from the instrument, store them under temperatures between -20℃... -
Page 26: Cleaning Of Meter Cover
11. CLEANING OF METER COVER This instrument is tested by our company's quality standard and is delivered in the best condition after passed the inspection. But in the dry time of winter static electricity sometimes builds upon the meter cover due to the characteristic of plastic. When the pointer deflects by touching the surface of this tester or zero adjustment cannot be made, do not try to make measurement. - Page 28 DISTRIBUTOR Kyoritsu reserves the rights to change specifications or designs described in this manual without notice and without obligations. 11-18 92-2363...
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