C
HAPTER
4 A Q
UICK
O
VERVIEW
OF
D
E
L
OGGER
: More Important Concepts and Terminology
29
UM-0071-A0
Channel
A “conduit” or “route” for data. See Figure 23.
DT800 Channels
The DT800 has
•
external physical channels
— the sets of terminals
on the outside to which you connect sensors and
transducers, and
•
internal physical channels
— internal sources of
information, such as time and date from the
DT800’s clock/calendar, temperature, battery
voltage, system variables and system timers.
DeLogger Channels
DeLogger works with
•
physical channels
— data returned from a DT800 (a
“physical data site”) either in real time, or unloaded
at the end of a logging session
•
historical channels
— data supplied from a replay
file (a “replay data site”; see page 30).
Figure 17 (page 24) shows where channels fit within
projects, programs and schedules.
Details of all channels are kept in DeLogger’s
data
hub
Programs and Jobs
When you’re working with DeLogger and a DT800,
the terms
program
and
job
mean the same thing.
Because the DT800 works with program entities called
“jobs”, every program you create in DeLogger is
automatically tagged as a “job” when you send it to a
DT800.
This tagging is almost invisible to the user (you can see
it if you
Load DLP (Program) Text
into a text window
entry screen). It’s necessary for the DT800 to recognise
a DeLogger program, but not for DT50 or DT500/600
Series
dataTakers.
Database
DeLogger stores housekeeping information (such as
Connections, windows, and window sizes and
positions) in a database.
And, by upgrading to DeLogger Pro, you can have
extra database data management capabilities that
add immense power to your data collection, analysis,
presentation and reporting — all without leaving
DeLogger Pro.
SENSORS
Internal channels
PHYSICAL
CHANNELS
HISTORICAL CHANNELS
External channels
DeLogger
Replay file
Physical
channel
data
Form window
Spreadsheet window
Chart window
Text window
Mimic window
Form window
Spreadsheet window
Chart window
Text window
Mimic window
Historical
channel
data
F
IGURE
23
Channel concepts — external and internal,
physical and historical
Summary of Contents for DT800
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