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Table of Contents
Related Manuals for LEM LH240
Summary of Contents for LEM LH240
- Page 1 LH240 LH1040 LH2040 LH2015 AC/DC Clamp On Multimeters Pinces Multimétriques AC/DC AC/DC Zangen-Multimeter Multimetri tenaglia c.a./c.c. Multímetros de inserción de C.A./C.C. Operating Instructions Mode d’emploi Bedienungsanleitung Istruzioni per il funzionamento Instrucciones de Funcionamiento...
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Page 2: Table Of Contents
CONTENTS PAGE 1 INTRODUCTION ........1.1 Instrument Features ......2 SPECIFICATION ........2.1 Electrical Data........2.2 General Data ........3 OPERATING INSTRUCTIONS ....3.1 Current Measurement ......3.2 Resistance Measurement ....3.3 Voltage Measurement ....... 11 3.4 Diode Test .......... 11 3.5 Analogue Output ......... -
Page 3: Introduction
• Ohms, Continuity and Diode Test * • Max RMS (surge) and Data Hold • Analogue outputs for recoder, logger or oscilloscope * LH40 series only (LH240, LH1040, LH2040) The LH series of instruments conform to the latest international directives and standards concerning safety and electromagnetic compatibility. -
Page 4: Specification
The main operating features of the instrument are as follows. See Fig. 1. (1) Clamp-on jaws for current measurement (2) Jaw opening lever (3) Rotary switch for function selection (4) Push button switch for MAX/ ) selection. MAX holds the maximum RMS value when in the current or volts mode. -
Page 5: Electrical Data
2.1 Electrical data (All accuracies stated at 23°C ± 1°C) 2.1.1 Current measurement (DC, DCRMS*, ACRMS) LH240 Measuring range ....0 - 200A DC or AC pk Autorange facility 40A / 200A Resolution ......10mA in 40A range 100mA in 200A range Accuracy I >... - Page 6 This function is actuated by pressing MAX/ ) when in DC, DCRMS*, ACRMS Amps. No polarity indication is given for DC readings. Typical acquisition time is 100ms Accuracy ......± 2% rdg ± 4 digits Frequency Range ....DC and15 Hz to 1kHz in DCRMS * 15 Hz to 1kHz in ACRMS...
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Page 7: General Data
SAFETY WARNING Before removing the battery cover, make sure that all external voltages are disconnected from the instrument. For certainty remove all leads. Output voltage in all ranges: LH240....5mV/A LH1040....1mV/A LH2040....0.5mV/A Accuracy ....± 1.3% rdg ± 1mV (RMS) ±... - Page 8 Display 4000 count 12mm high characters. Low battery indicator Max RMS Amps or Volts ∼ ∼ ∼ ∼ ---- DC, DCRMS * Diode * kΩ Ohms * Continuity * Hold 2.2.2 Power Supply Battery Type 9V Alkaline PP3 ,NEDA1604 or IEC 6LR61 Battery life typically 40 hours continuous operation.
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Page 9: Operating Instructions
Width 98mm / 3.86” Depth 52mm / 2.05” Weight....500g / 1.1 lbs. Case Material ..Bayblend T85MN Jaw Opening ..55mm / 2.2” Accessories... Voltage probes * Analogue Output lead * Carrying case Operators manual Cleaning ....The unit can be cleaned with an isopropanol impregnated cloth. - Page 10 Move the rotary switch to Amps AC, DC or DCRMS*. • Wait until the autozero operation has completed and the display reads 00.00 (LH240), 000.0 (LH1040, LH2040, LH2015) to within ±3 digits. • Press the trigger to open the jaws and clamp them around the current carrying conductor as shown in Fig.
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Page 11: Current Measurement
Fig. 2 Current Measurement 3.3 Measurement of AC or DC Voltage *... -
Page 12: Diodetest
SAFETY WARNING To avoid possible electric shock and damage to the instrument, do not attempt to measure any voltage that might exceed the maximum range of the instrument - 600Vrms and 1kHz. • Move the rotary switch to the V DC or V AC position. - Page 13 Fig. 3 Voltage Measurement...
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Page 14: Safety
If the analogue output lead is connected to a hand held oscilloscope, then the maximum working voltage that may be connected to any of the other oscilloscope inputs must be less than 300V RMS to Earth. • Located in the battery compartment is a slide switch, which selects either the instantaneous or RMS analogue output. -
Page 15: Battery Replacement
Safe operation of the instrument is the responsibility of the operator who must be suitably qualified and/or authorised. Maximum Safe Voltage Current :- 600V MAXIMUM AC RMS or DC between uninsulated conductor and ground and maximum frequency of 1kHz. This limitation applies to bare conductors only. -
Page 16: Warranty
Fig. 4 Battery Replacement 6. WARRANTY Your LEM HEME clamp on multimeter is guaranteed for one year from the date of purchase against defective material or workmanship. If the meter fails during the warranty period, we shall at our discretion,... - Page 17 The LEM group offers a wide range of non-invasive transducers, probes and instrumentation for the measurement and analysis of current, voltage and power. Since the introduction of the world’s first digital AC/DC clamp-on ammeter in 1982, LEM HEME has continued...
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