Measurement Computing LogBook Series - Manual (Page 162)

LV-36 LogView 989592 Software Reference
The (physical) Channel column identifies the hardware channel assignment.
The User Label column allows you to enter a more suitable channel name of up to 32 characters.
The Source column designates the input or calculated channel used as the source of data for this output
channel. An entry of None disables the output channels.
The Initial Value column allows you to initialize the output to a specified value.
The Units column indicates units for Initial Value. This column can not be edited. The default is Decimal.
Serial / GPS Channels ( LogBook/360 Only )
LogBook/360 can store latitude, longitude, and altitude coordinates along with the analog and digital data
from the attached transducers, providing it is connected to a Global Positioning System (GPS) receiver.
LogView software provides an easy method for setting up the GPS channels. No programming, character
string parsing, or protocol decoding is necessary.
LogBook/360 can provide direct support for any GPS receiver that conforms to the NMEA 0183 protocol
standard. GPS support is not provided for LogBook/300.
GPS receivers must be purchased separately, and are available from a variety of sources. If purchasing
a GPS make sure it conforms to the NMEA 0183 protocol standard.
LogBook Hardware Configuration
Reference Note: Refer to chapter 6, GPS & Serial Device Data Collection, for detailed information.
Calculated-Channel Configuration
LogBook can derive virtual channels from real and/or virtual channels using math operators and
functions. The resulting virtual channels can be used to:
• Create alarms based on any combination of signal levels from real channels and logical or
mathematical functions of virtual channels
• Reduce data through statistical operations, comparisons, etc.
• Develop sophisticated trigger equations using a series of averaging, comparing of other real and
virtual channels
• Manipulate input channel values for a more useful output (perhaps the quantity of interest cannot
be measured directly but depends on a complex derivation from several measurements)
• Control external devices via digital output signals (like a simple Programmable Logic
Controller)