Handling; Manual Control; Controlling Via Modulation / Monitor; Modulation - piezosystemjena NV40/3 Bedienungsanleitung

8 handling

8.1 manual control

Each channel can be controlled by turning the encoder knob on the front panel. Turning
clockwise increases the applied voltage signal, turning counter clockwise reduces the applied
voltage signal. Depend on how fast the knob is turned, the change of the applied signal can
be adjusted.
The closed loop mode of the NV40/3CLE, NV120/1CLE amplifier can be switched on and off
by pressing the encoder knob for each channel. If you switch off the amplifier the operational
mode (closed loop, open loop) will be saved, and after switching on, the amplifier starts again
with its last operational mode.

8.2 controlling via modulation / monitor

8.2.1 modulation

The amplifier can be controlled by an external modulation signal from 0 to 10V. In addition,
the digital encoder can be used to shift the offset of the modulation input. Please note, the
signal of the encoder and the signal of the modulation input are added finally. The sum of
both voltages must be in range between 0 and 10 Volts. Voltages outside oft he permissible
field are signaled by UDL or OVL.
An adapter cable with BNC to D-SUB connector is included. The modulation is marked on
the back panel by MOD/MON.
By using an external modulation signal in open loop mode 0V correspond to a value of –20V
and 10V correspond to voltages signal of 130V applied to the piezo actuating system.
In closed loop mode () 0V corresponds to a motion of 0µm, 10V corresponds to the max.
motion based on the specification of the used piezo actuating system.

8.2.2 monitor NV40/3CLE, NV120/1CLE

The monitor output is an analogue feed back of the output parameters. The monitored value
based on a scaled value from 0 to +10 and in addition the reserve value of the overshooting
range.
The monitor output can be switch in different modes via RS232 or USB interface.
(x describes the number of channel)
monwpa,x,0: Output of a voltage proportional to the actuator voltage. This mode will set
the monitor output signal fixed to its characteristics. Shown in diagram 1.
Geschäftsführer: Dr. Bernt Götz • Telefon 03641/66880 • Fax 03641/668866 • www.piezosystem.com
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diagram 1