4 - 2
Introduction to the Sigma LT Hand-Held
The Sigma LT hand-held is an optional method of control for networking load banks. Up
to 25 Sigma LT load banks are able to be connected in a single network. Sigma LT also
provides individual control of any load bank in the network.
Why network load banks?
•
Networking allows remote control of the load bank from up to 250m.
•
Smaller load banks can be networked for increased capacity, perfect for testing where
a larger load bank would not be suitable i.e. basements and roofs.
•
Finer load resolution can be achieved by networking a load bank with small load steps
with larger load banks.
•
Redundancy can be achieved by using n+1 load banks. This can be important when
running 24 hour commissioning tests.
The Hand-held
Figure 4 -1
The Sigma LT Hand-held
Chapter Four
4.3” Touch
Screen Display
Cable connection point
USB Port
Aluminium
Enclosure
4 - 3
Key
See below for the list of symbols that will need to be used for operation of the hand-held
control.
Hand-held control operation
Decrease Load
Increase Load
Manual Load Entry
Apply Load
OK
Reject Load
Next Screen
Down Screen
Back Screen
Network Overview
Network Search
Navigation
Other Symbols
Settings
Status - Load Off
Status - Load On
Status - Load Warning
Status - Error
Load Selection
Load Bank ID
USB Found
Single Load Bank
Control
