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Related Manuals for Besantek BST-LT03
Summary of Contents for Besantek BST-LT03
- Page 1 BST-LT03 DIGITAL AC LEAKAGE CLAMPMETER INSTRUCTION MANUAL...
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Page 2: Table Of Contents
Index Page 1. Introduction........2. Safety Notes........3. Features..........4. General..........5. Specifications........6. Instrument Layout....... 10-12 7. Operation..........12-18 8. Maintenance........Due to our policy of constant improvement and development, we reserve the right to change specifications without notice. -
Page 3: Introduction
1. Introduction NOTE This meter has been designed and tested According to IEC Publication 348, Safety Requirements for Electronic Measuring Apparatus, IEC-1010 (En61010) and other safety standards. Follow all warnings to ensure safe operation. DANGER is reserved of conditions and actions that are likely to cause serious or fatal injury. - Page 4 ● Be sure to use the instrument only in its intended applications and to follow measurement procedures described in the manual. DANGER ● Never make measurement on a circuit above 600 VAC. ● Do not attempt to make measurement in the presence of flammable gasses, fumes vapour or dust.
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Page 5: Safety Notes
CAT IV - Is for measurements performed at the ※ source of the low-voltage installation. CAT III - Is for measurements performed in the building installation. CAT II - Is for measurements performed on circuits directly connected to the low -voltage installation. -
Page 6: Features
● Rated environmental conditions: a. Indoor use. b. Installation category III. c. Pollution degree II. d. Altitude up to 2000 meter. e. Relative humidity 80% max. f. Ambient temperature 0~40°C. Observe the international Electrical Symbols listed below : Meter protected throughout by double insulation or reinforced insulation. - Page 7 ● Measures from 0.1mA to 1000A AC and provides frequency response higher than 1kHz on all measuring ranges. ● Provides a frequency selector switch - 50/60Hz or WIDE - to turn on or off an incorporated low pass filter. This permits current measurement in mains fundamental frequency only or a wide range of frequencies, including those from such devices as inverters.
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Page 8: General
● Safety design throughout with no exposed metal parts, shielded banana plugs and recessed input terminals. ● Low battery indication. 4. General ● Display : 3½ digit (2000 counts). ● Low Battery Indication : " " sign appears on the display when the battery voltage drops below accurate operating level. - Page 9 ● Dimensions : 260(L) x 95(W) x 43(D)mm ● Weight : Approx. 540g (battery included) ● Power source : One type PP3, 6F22, 006P(or equivalent), 9V manganese. ● Temperature & Humidity for Guaranteed : 23°C ±10°C at< 80% max. relative humidity. ●...
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Page 10: Specifications
5. Specifications (All at 23°C±5°C, ≤80%R.H) Measuring Ranges and Accuracy ● AC Current : Accuracy Time Limit of Ranges Measuring 50/60Hz WIDE 50/60Hz : 200mA(0~199.9mA) ±(1.0%rdg+2dgt) 2A(0~1.999A) ±(1.5%rdg+2dgt) 40/1000Hz : ±(3.0%rdg+2dgt) 20A(0~19.99A) 50/60Hz : ±(1.5%rdg+2dgt) continuous 200A(0~199.9A) ±(2.0%rdg+2dgt) 40/1000Hz : ±(3.5%rdg+2dgt) 50/60Hz : ±(1.5%rdg+2dgt) - Page 11 ● Effect of Residual Current 10mA AC max. When clamping on two 10mm-dia conductors, each carrying supply or return 100A AC current. ● AC Voltage : Range Resolution Accuracy 200V 0.1V ±(1.5%rdg+3dgt) 600V ±(1.5%rdg+3dgt)
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Page 12: Instrument Layout
6. Instrument Layout (10) -10-... - Page 13 (1) Transformer Jaws Pick up the AC current flowing through the conductor. (2) Barrier Provide a protective distance from hands to conductor. (3) Jaw Trigger Press the lever to open the transformer jaws. When the lever is released, the jaws will close again. (4) Power Function/Range Switch Select function and range.
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Page 14: Operation
(6) Frequency Selector Switch Makes frequency response selection. (7) Off / MAX Selector Switch The meter displays the maximum value when the "MAX" function is on. (8) Hold Button Press the HOLD button (HOLD annunciator turns on) makes the meter stop updating the LCD display. - Page 15 If the display blanks or " " is indicated, replace the battery in accordance with the battery replacement procedures as described in section. Note : " " also appears on the display when the battery becomes exhausted during use. Replace with a new battery. (2) Make certain that data hold button is in the off position-not pressed down.
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Page 16: Operation
CAUTION ● Transformers jaws, especially their tips, have been precisely adjusted to obtain maximum accuracy. Take sufficient care to avoid shock, vibration or excessive force when handing the instrument. ● When a foreign substance is stuck in the jaw tips or they cannot properly engage, the transformer jaw fo not fully close. - Page 17 ● The transformer jaws may buzz when measuring large current. This has no effect on the instrument's performance or safety. (1) Set the function/range switch to the desired position. Do not exceed the maximum allowable input current for the selected range. (2) For normal measurement, press the jaw trigger to open the transformer jaws and clamp onto one conductor only.
- Page 18 Fig.1 Normal AC Current Measurements Fig.2 Leakage Current Measurements on the Single-Phase System Fig.3 Leakage Current Measurement on Three-Phase System -16-...
- Page 19 7-3 How to Use The Frequency Selector Switch The meter has a very good frequency response because of the electromagnetic property of its transformer jaws. Therefore, it measures AC current not only of fundamental frequency of 50Hz or 60Hz, but of high frequencies and harmonics superimposed on the fundamental frequency.
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Page 20: Maintenance
The display can be observed away from the conductor. Push the button again to release the reading. 7-5 Voltage measurement Insert the BLACK test lead to COM and the RED one to the other terminal. Switch to AC V range for AC voltage.
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