Digital ohmmeter RESISTOMAT® 2304

bench-top

RESISTOMAT® 2304 High-Precision Measurement Automatic inspection and test unit: Automatic choice of measuring ranges from 200 μΩ to 20 kΩ Resolution up to 1 nΩ Standard interfaces IEEE488, RS232, RS485, (USB and Ethernet option) Checking of tolerances, classifi cation with statistics Highest measuring accuracy: Measuring error ≤ 0.01 % Future-orientated measuring method with thermal e.m.f. compensation. High level of stability due to constant comparisons with internal reference values. Inductive probes: Current regulation results in voltage-free disconnection, calculation of cooling curves of coils. Menu control: Setting for measuring current entry for absolute or relative limits, classifi cation with statistics, bar display for calibration of measuring probes, determination of resistivity, and many other functions. The operation of the measuring section of the RESISTOMAT® model 2304, 2305 high-precision inspection and test unit is based on an upgraded 4-wire design. It measures not only the voltage drops with injected current across the test object but also across an internal reference resistor. The quotient is calculated from both voltage drops. The resistance of the test object is calculated by multiplying this with the characteristic value of the reference resistor. Apart from eliminating the error of contact layer and contact resistance, this method has the advantage that errors reduce to the quality of the internal reference resistors alone. The deviations in these reference resistances are well known and accounted for the multiplication.