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The Fluke 1550B MegOhmMeter provides for powerful troubleshooting and predictive maintenance capability. Features. Standard test voltages of 250 V, 500 V, 1000 V, 2500 V and 5000 V for a wide range of equipment testing. Programmable test voltages available in 50 volt steps from 250 to 1000 volts and 100 volt steps from 1000 to 5000 volts. Automatic calculation of Dielectric Absorption (DAR) and Polarization Index (PI) with no additional setup. Easy set-ups save time and effort when conducting “timed” and “ramp” test of insulation breakdown. Improved ramp function (0 to 5000 V dc) for breakdown testing. Autodischarge of capacitive voltage. Measures resistances up to one teraohm. Measures cable or insulation capacitance and leakage current. Warning voltage function alerts the user that voltage is present and gives the voltage reading up to 600 V ac or dc. Guard system eliminates the effect of surface leakage current on high-resistance measurements. Measurements can now be stored in up to 99 memory locations, with each location assigned a unique, user defined, four character (alpha-numeric) label for easy recall. Specifications. Insulation Resistance Measurement Test Voltage (dc): 250 to 5000 V. Insulation Resistance Measurement Ranges: 200 kohm to 1 Tohm. Short circuit current: greater than 1 mA and less than 2 mA. Bargraph range: 0 to 1 Tohm. Insulation test voltage accuracy: -0 % to +10 % at 1 mA load current. Induced ac mains current rejection: 2 mA maximum. Charging rate for capacitive load: 5 seconds per µF. Leakage current Range: 1 nA to 2 mA, (Accuracy ± (5 % + 2 nA)). Capacitance measurement Range: 0.01 uF to 15.00 µF, (Accuracy ± (15 % rdg + 0.03 µF)). Live circuit indicator Range: 30 V to 600 V ac/dc, 50/60 Hz (Accuracy ± (5 % + 2V)).
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