Model SR715 Model SR720 LCR Meters

GETTING STARTEDREAR PANELPOWER ENTRY MODULEThe Power Entry Module is used to fuse the linepower, select the input voltage, and filter highfrequency electrical noise.POWER SWITCHThe power switch is located on the rear right sideof the unit. Depressing the front side of the switchturns the unit on.EXTERNAL BIAS INPUTThe two banana plugs are the input connectionsfor the external bias voltage. The bias supply mustbe floating and well filtered. Neither side can beground referenced. The applied voltage must be40 VDC or less and current limited to 250 mA maxEXTERNAL BIAS FUSEProtects the external bias input from currentsgreater than 250 mA.RS232 DB25 CONNECTORThis connector allows for computer control of theunit over an RS232 interface. The connector isconfigured as a DCE (transmit on pin 3, receiveComputer serial adapter, which is usually a DTE,use a straight thru serial cable. See theprogramming section for more information.SW1These switches set baud rate, parity and wordlength for the RS232 interface. See theprogramming section for details on setting theinterface.HANDLER INTERFACE (OPTION 01)This provides control lines to a component handlerfor sorting. The interface has an input trigger lineand output lines indicating bin data available, busyand 10 separate bins. The connector is a maleDB25. See the Handler section for more detail.IEEE-488 (GPIB) CONNECTOR (OPTION 01)This connector allows for computer control of theunit over the GPIB or IEEE-488 interface. See theprogramming section for more information.SW2 (OPTION 01)These switches set the instrument address for theGPIB interface. See the programming section fordetail on how to set up the interface.1-6