LH240, LH1040, LH2040 True RMS AC/DC Clamp-on Multimeters for Professional Use Accurate, Rugged, Versatile and Reliable • • Three models: 200A, 1,000A and 2,000A • • AC and DC Amps, Volts, Ohms, Diode and Continuity Test • • Large jaw capacity takes 50mm ∅ or 2 x 30mm ∅ cables • • True RMS measurement of complex waveforms and analysis of AC and DC current components • • Autoranging and Auto-zeroing • • Excellent accuracy, even for distorted or non-sinusoidal A and V • • Display-Hold and Max-Hold (surge) modes for convenience in use • • Analogue outputs for recorder, logger or oscilloscope • • Conformance to IEC1010 and EMC standards High Accuracy Advanced jaw design means that 40-series accuracy is little affected by external magnetic fields or off-centre conductor positioning. Utilisation of Hall effect technology ensures a broad flat frequency response resulting in optimum accuracy even when harmonics are present. True RMS measurement By using True RMS measurement techniques the 40-series instruments avoid errors (up to 50%) which can occur when non-sinusoidal waveforms created by today’s complex loads are measured using traditional average- reading techniques. True RMS measurements are available for AC, DC (A,V) and AC+DC (A). IEC 1010 and EMC Conformance IEC 1010 safety features including a tactile barrier and special jaw design provide the user with confidence when making measurements in hazardous voltage areas. Conformance to EMC standards ensures high reliability through reduced susceptibility to electromagnetic interference. SPECI F I C A T I O N S MODEL LH240 LH1040 LH2040 NON-INVASIVE CURRENT MEASUREMENT Ranges (auto-ranging) 40A, 200A 400A, 1,000A 400A, 2,000A Measurement methods DC or AC True RMS, or DC only Resolution 10mA (40A range) 100mA (400A range) 100mA (400A range) 100mA (200A range) 1A (1,000A range) 1A (2,000A range) Accuracy ± 1.3% of reading ± 3 digits (1) Crest Factor 6 maximum for True RMS measurements Maximum measurable load 200A DC or AC peak 1,000A DC or AC peak 2,000A DC or AC peak Maximum overload 10,000 Amps ANALOGUE OUTPUT (2) Switchable Instantaneous or 5 mV / A 1 mV / A 0.5 mV / A RMS (100 ms) output Analogue output accuracy ± 1.3 % of reading ± 1 mV (1) VOLTAGE MEASUREMENT MECHANICAL DATA Dimensions (H x W x D); 251 x 98 x 52 mm Methods of measurement AC True RMS or DC (4) 9.88 x 3.86 x 2.05 inches Maximum overload 1,000V Weight 500 gm / 1.1 lbs Ranges (auto-ranging) 400V, 600V Jaw Capacity Accuracy 1 x 50mm / 2.0-inch ∅ cable or ± 1% of reading ± 3 digits (1) 2 x 30mm / 1.2-inch ∅ cables Resolution 100mV (400V range); Jaw Opening 55mm / 2.2 inches 1V (600V range) ENVIRONMENTAL DATA Crest Factor 6 for V < 1,000 V peak o o o o Input impedance Operating Temperature 0 C to 50 C (32 F to 122 F) 1MΩ o Temperature Coefficient RESISTANCE, CONTINUITY AND DIODE TESTING ± 0.1 % of reading per C o (Current) ± 0.06 % of reading per F Ω ranges (auto-ranging) 400 Ω, 4 kΩ o o o o Storage Temperature -20 to 60 (-4 F to 140 F) Ω resolution 0.1 Ω (400 Ω range), SAFETY 1 Ω (4 kΩ range) All models comply with IEC1010-1, 600V working, Ω accuracy ± 1% of reading ± 3 digits (1) Installation category lll, Pollution degree 2. Continuity sounder ) Toggled on & off by ))) button; MAXIMUM SAFE VOLTAGES (Ω range only) Sounds when resistance < 50 Ω Current measurement 600V AC RMS or DC between To 600 V, DC or sinewave RMS Input protection, Ω & (bare conductors) uninsulated conductor & ground diode-test Voltage measurement 600V AC RMS or DC between Diode test 3.2V max. open Reads forward-biased diode input terminals or between live circuit, 0.3mA short-circuit voltage to 2,000 mV terminal & local ground. Diode-test accuracy ± 1% of reading ± 2 digits Notes: o o o FREQUENCY RESPONSE 1. All accuracies stated at 23 C ± 1 C (73.4 ± 1.8 F) (Measurements and Analogue Output ) 2. Analogue output is from plug-in adaptor with standard AC only True RMS V & A 15 Hz - 1kHz (3, 4) BNC output socket 3. At stated accuracy; extend to 5 kHz for -3dB. DC True RMS A DC + 15Hz to 1kHz (3, 4) 4. True RMS measurements taken over 100 ms DC V and A DC only DISPLAY LEM Size and type 4000-count LCD The LEM group offer a wide range of non-invasive 12mm / 0.5-inch characters transducers, probes and instrumentation for the Status indication Low Battery, Data Hold, measurement and analysis of current, voltage and power. Pk (MAX Hold), AC, DC, Diode Since the introduction of the world’s first digital AC/DC Test, Ω, )))) (Continuity) clamp-on ammeter in 1982, LEM HEME has continued to Refresh rate 3 times per second provide innovative test and measurement solutions POWER SUPPLY encompassing current measurement from 5mA to 2,000A Battery type 9 V Alkaline: MN1604, PP3, IEC 6LR61 or equivalent Battery life Typically 40 hours Distributor LEM HEME Limited, 1 Penketh Place, West Pimbo, Skelmersdale, Lancs, United Kingdom. WN8 9QX Telephone 01695 720535; Fax 01695 50279 Telex 629792 HEME G International: Tel +44 1695 720535; Fax +44 1695 50279 LEM Subsidiaries: China, France, Germany, Japan, Russia, Sweden, Switzerland, USA LEM HEME Limited have a policy of continual product improvement, and the company reserves the right to revise the above specifications without notice. LH40-1BR.DOC 03/95 Issue 1