Ocean Optics NeoFox, Инструкция по установке и эксплуатации

Страница: 58 / 68

C: Analog Output
50 013-20000-009-02-201510
Mode Meaning
0 Off
This mode does not actually turn the current source off. Instead it sets the current source to 4
mA and the voltage source to 0 V. It does
not reduce the unit’s power draw.
1 Oxygen
This is the standard percent oxygen mode. The data source will be percent oxygen, not a
converted unit such as ppm or torr. See Mode 5 for more information on these alternate units.
2 Temperature
Temperature (in degrees Celsius)
3 Pressure
Not yet supported
4 Tau
In microseconds
5 Alternate O
2
Units
In this mode, the dimensionless value of the alternate O2 value is compared with the lower
and upper bound parameters.
Selecting a Data Range
The data ranges of the analog outputs are fully adjustable through the lower bound and upper bound
settings in NeoFox Viewer. These settings are simply unitless values that are compared to the unitless
value of the data source.
Analog Voltage Boundaries
The analog voltage lower bound represents the value of the data source that corresponds to a 0 volt analog
output. The analog voltage upper bound represents the value of the data source that corresponds to a 5
volt analog output. Intermediate values are linearly scaled across this region to produce the appropriate
output. Values of the data source that fall outside this region result in output voltages that are either 0
volts or 5 volts depending on whether the value of the data source exceeds the upper bound (resulting in 5
V) or falls short of the lower bound (resulting in 0V).
Analog Current Boundaries
The analog current lower bound represents the value of the data source that corresponds to a 4 mA analog
output. The analog current upper bound represents the value of the data source that corresponds to a 20
mA analog current output. Intermediate values are linearly scaled across this region to produce the
appropriate output. Values of the data source that fall outside this region result in output currents that are
either 4mA or 20 mA depending on whether the value of the data source exceeds the upper bound
(resulting in 20 mA) or falls short of the lower bound (resulting in 4 mA).