Thermo Finnigan SpectraSYSTEM UV6000LP, Reference Manual

Page: 82 / 137

5-6 Thermo Electron January 2004
Outputs Group
The Outputs Group allows users to specify the state (high or low) of
the output signal, when activated. There are three remote outputs
available: Run, Ready and Event. Spare is not used.
NOTE: Do not change the sense of any output signal connected to external
equipment without knowing the equipment’s requirements. This can cause
permanent damage to both pieces of equipment.
Two radio buttons are associated with each output signal. When the
High button is activated, the associated signal transitions from a low
level to a high level when it is turned on and from high to low when it
is turned off. The on/off sense is reversed when the Low button is
activated.
To test the outputs, set a voltmeter to its 10 V scale and connect it
b5V and an output terminal. Alternatively you can connect
an LED and 100 Ohm resistor in series. The LED’s cathode should be
connected to the output terminal and the other end of the resistor
connected to the +5V terminal. The meter should read +5V or the
LED should light when the output is ON and its Sense is Low or the
output is OFF and its Sense is High. Remember that you are
changing the sense of the return line, not the +5V.
To toggle the remote outputs, first select Instrument Status from the
Control drop-down menu. Right-click anywhere in the Instrument
Status window and select Output from the pop-up menu. The remote
outputs will then appear in a drop-down menu. Select the desired
output by clicking on that menu item. A check mark will appear
indicating that the output has been activated. Repeat this process to
test the other remote outputs.
Scans Group
To display spectral scans, select the Scans check box and fill in the
scan parameters for the desired range, frequency, etc.
NOTE: The scan start and end values must not be set closer to their
respective limits than the (bandwidth - 1)/2. That is, with a bandwidth of 3
the scan limits are 199 and 799 nm and with a bandwidth of 5 the limits are
192 and 798 nm.
Start
Enter the wavelength or pixel for the start (lower value) of the scans
in this field. The range of acceptable values is from 190 to 800 nm or
from 2 to 511 pixels. The default is 200 nm in the absorbance mode
and pixel 2 for the intensity mode.