Thermo Scientific LevelPRO, Руководство пользователя

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Operation
Physical Inputs & Outputs
Physical Inputs
& Outputs
Analog (Current &
Voltage) Inputs
The function of an analog input is to connect external signals, such as, pressure, or
density, to the detector for conversion into a form to be used by the internal
measurement process. Further, the analog input signal in the detector is mapped to an
input type such as pressure or density, and appropriate unit and measurement ranges
are assigned.
The analog inputs offer a way for the user to provide additional process information to
the detector. This information may be used by the detector to provided additional
types of measurements.
For a level application, the analog inputs will be used to provide pressure and density
information. The pressure information may be used for high
- pressured vessels
calculation. The density information may be used for vapor compensated density
calculation.
Two types of analog inputs are available on the detector: current inputs, labeled 4–20
In 1 and 4–20 In 2 on the main board, and voltage inputs, labeled Vdc In 1 and Vdc
In 2 on the main board.
Note:
All four of the Current/Vdc Input tabs are essentially the same, except
the current tabs reference milliamps and the voltage tabs reference volts.
Current Tabs Within the EZ Cal II software, select Current/Vdc Input from the menu tree on the
left to bring up the tabs containing the analog input tabs. The Current Input #1 (mA
#1) tab will display by default.
Thermo Scientific LevelPRO User Manual
4-17