Advanced Measurement Technology 273A, User Manual

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Chapter 5—Operating Instructions 49
Fig. 8. Model 273A Rear Panel.
Warning! To prevent dangerous, possibly lethal electric shock, always have the front-panel
cell enable switch in the off position when handling the clip leads at the end of the
electrometer assembly. Voltages as high as ±100 V at currents as high as 1 A could
be present.
5.3.1. Cell Interface
The cell cable mates with this 36-pin connector. The connections include shields and grounds,
the electrode connections, and power for the Differential Electrometer Assembly. The hard-wired
cable from the Differential Electrometer Assembly mates with this connector.
5.3.2. Recorder Interface
This 15-pin D-type connector is provided for interfacing between the Model 273A and a
Princeton Applied Research RE0150 or RE0151 recorder. Connections include a Y-axis drive
(same as the front-panel OUTPUT signal), an X-axis drive (same as the front-panel E MONITOR
signal), and a contact closure for the Pen Up/Down function.
Two different recorder cables are available. C174 connects directly from the RECORDER
INTERFACE connector to the interface connector on either the RE0150 or RE0151 recorder.
With this cable installed, the OUTPUT signal drives the Y-axis, the E MONITOR signal drives
the X-axis, and the pen closure requirements are provided for.
For operation with other recorders, or with an RE0150 or RE0151 recorder in applications where
the normal X- and Y-axis drive signals are to be reversed (corrosion), cable C178 is
recommended. One end of this cable has a connector that mates with the Model 273A's
RECORDER INTERFACE connector. At the other end are two pairs of banana plugs and two
leads terminated in spade lugs that provide the pen-drop contact closure. One pair of banana
plugs provides the OUTPUT signal, the other the E MONITOR signal. Either can be connected to
either the X-axis or Y-axis inputs of the recorder.