General Description The 6 1/2-digit PREMA Model 5001 and 6001 digital multimeters are both instruments with an outstanding capability to price ratio and provide the following measurement functions: • Direct voltage measurements with lOOnV resolution • Alternating voltage measurement for true rms values with IjxV resolution Direct current measurement with InA or ljxA resolution • Alternating current measurement with lOnA or 10 pA resolution • Resistance measurement with the 5001 for 2-wire, and with the 6001 for either 2- or 4-wire • Temperature measurement by means of the PT-100 sensor for the model 6001 In addition, for these measurement functions, the instrument is provided with many interesting, and advantageous feature as later described in detail. • greater than 1GH Input Resistance up to ± 2V • Selectable integration times of 50ms, 100ms, 0.5s, Is, 5s and 10s • Choice of internal mathematics programs: offset, % deviation, growth, ratio, dB and dBm • Digital offset correction allows compensation, for example, for thermo voltages and test lead resistances The PREMA Multiple Ramp Technique, which is used for the analog to digital conversion, offers the guarantee for outstanding linearity and long-term stability during the continuous integration of the measurement signal without disturbing measurement interruptions. These multimeters can be equipped with a 10-channel, four-pole Multiplexer (optional). The maximum switch voltage is 125V, the maximum switch current 2A, and the thermo voltages on the contacts are less than ljxV. The standard IEEE-488-Bus Interface allows the remote control and supervision of all functions of the multimeter including digital calibration. An excellent ground division between the multimeter and the IEEE-signal bus helps allow a faultless lOOnV resolution during direct voltage measurements in system operation. An easy to use digital calibration feature is offered with these multimeters. A single debit value to be used for offset can be entered via the keyboard or IEEE-488-Bus, and is usually sufficient for calibration of a measurement field. Every measurement field of every function can be independently recalibrated as desired. A recessed switch on the back of the multimeter protects against unintentional changes of these correction factors. PREMA designs and manufactures certain key integrated circuit chips (ASICs), uses their patented A/D conversion process, and also has almost twenty years manufacturing experience in high precision measurement products. For these reasons, PREMA digital multimeters use fewer critical and other components than competition which results in a more dependable multimeter with a longer service life.