Chapter One
1 - 6
Introducing Froment Load Banks
1 - 7
Decade switch local control panel. The simplest form of control is via a series of decade
switches mounted on the unit’s switchplate or on a remote control panel. These provide
basic manual control and are only available on units fitted with purely resistive load
elements.
Figure 1-4 Decade switch local control panel
Sigma Hand-held. The Hand-held unit provides load control and instrumentation on
Sigma controlled load banks.
Figure 1-5 Sigma Hand-held
The Hand-held contains a membrane keyboard and built in display unit and is connected
to the load bank by a control cable. The Hand-held’s simple user interface provides a way
for generator tests to be conducted in an intuitive way with minimum of calculation.
Sigma PC Load Control Software. As an alternative to the Hand-held the load bank can
be connected to a PC running Froment Sigma PC Load Control software.
This Windows™ application provides all of the facilities of the Hand-held with an enhanced
user interface, improved instrumentation and facilities for response analysis, data
acquisition, and reporting. Test data can be exported for use by other applications such as
Microsoft™ Excel.
status indicator
Figure 1-6 Sigma PC Load Control Software
Sigma Modbus Interface. Every Sigma controlled load bank has the capability to be
remotely controlled using the industry standard Modbus serial communications protocol.
This will allow the load bank to be integrated with a wide range of test, automation,
supervisory and monitoring systems. Modbus control is beyond the scope of this manual.
If you need more information please contact the Froment technical support department.
Note: Both the Hand-
held and the PC soft-
ware can control up to
14 Sigma controlled load
banks simultaneously.
Tests can be run manu-
ally or automatically us-
ing a pre-programmed
test sequence.
© NJ Froment & Co. Ltd. This document may not be copied
or disclosed in who le or part without prior w ritten authority.
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