A-M Systems 2200 Gebrauchsanweisung - Seite 5

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indirectly attached to the Model 2200 output. Some kinds of connectors (e.g. BNC

connectors) have exposed metal parts which may float at dangerous potentials unless

externally connected to safety ground. For greatest safety, turn the Model 2200 off

before handling connections to the output.

The instrument is very simple to operate. First, check the battery condition: set the Power

switch to off, and push the Battery Test button. The Test light should come on, indicating an

adequate charge. Connect your input signal to the Signal In connector. Set the Polarity

control to the predominant polarity of the waveform. Connect the Output to the stimulation

electrode (or other load you wish to drive) and set the Range switch to the correct scale. If

you wish to tum the output signal on or off by a separate controller (e.g. a timing signal), or be

able to test the batteries via computer control during the course of an extended experiment,

connect the control signal to the Control/ Gate input. Now tum the Power switch to On.

The output may go to an unpredictable state if the battery charge is not maintained. It is the

user's responsibility to ensure an adequate battery charge. Regular use of either front-panel

or control-port battery testing is sufficient to guarantee proper battery charge.

The Error indicator should remain unlit in normal operation. The Error LED will light when the

computer-interface battery test is in operation. Be aware, however, that the Error LED will not

light if the batteries are dead! It is normal for the LED to turn on briefly when the front panel

controls are switched.

To recharge the batteries, connect the battery charger to the rear Charger input, and set the

Power switch to Charge. Note that if the switch is left in the Charge position without any

incoming electrical power, the batteries will very slowly, but certainly, become discharged.

Signal Control

The voltage at the Signal In BNC defines the output waveform. The signal is DC coupled

across the optical isolation barrier, so virtually any waveform can be used. It can be turned

on and off with a digital Gate signal through the Control port

Set the Range control to achieve the type (voltage or current) and amplitude of output

required. The output power is limited to 100V (±50V in bipolar mode) and ±5mA. For

A-M Systems

Operating Instructions

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