Automatic LCR Meter 4210 provides direct and accurate measurements on inductors, capacitors and resistors at any of three alternative frequencies. In addition to reading the major term (inductance L, capacitance C, or resistance R), it can be switched to measure the resistive loss term of inductors and capacitors, and any L or C term present with resistors. The instrument selects the more appropriate presentation of results - equivalent series or parallel components - but operators may select the alternative form whenever required. Automatic readout of the Q=factor of inductors is available, the 4210 computing the ratio of reactance to resistance. Similarly, the dissipation factor D of capacitors can be read directly. An internal voltage is available for polarisation of capacitors when required. The 4210S is electrically the same as 4210 but is designed for use in an automatic test and measurement system. To this end, it is supplied in a case for rack mounting (19-inch) and the connections to the component under test are four BNC connectors on 24mm pitch (replacing the connection pillars of the 4210