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NDSL Cellwatch
Cellwatch Battery
Monitoring: Total Fault Tolerance
Features and Benefits
 | Measures voltage on each cell, either 6 or 24 times per day.
The software records data for graphical presentation during
that day as well as average
data for historical analysis or trending. Also compares this data
continuously with high and low alarm settings for alarm
activation. |
| Measures internal resistance on each cell, either 2 or 4 times
per day. The software records data for graphical presentation
during that day as well as
average data for historical analysis or trending. Also compares
this data continuously with high and low alarm settings for alarm
activation. |
| Measures the temperature of either the battery room ambient or
a 'pilot' cell. Records this figure for graphing as well as
comparison with high and low alarm setting for alarm activation.
|
| Measures discharge current from a battery string and compares
the data with a discharge alarm limit set in software. In the
event of a discharge, rapidly records all cell voltage data as the
battery discharges for later identification of weak cells under
load. |
| Supplied with dedicated computer running the Microsoft Windows
operating system and Cellwatch proprietary application for
reporting, recording and data analysis. |
| The system is modular, so if your needs change, Cellwatch can
be reconfigured or expanded. |
| Cellwatch is a global product, with manufacturing both in the
USA and in Europe. |
| Low voltage DC components. Measurement components never see
greater than 48V nominal DC so battery connections are all low
voltage. Electrical isolation is achieved by plastic fiber optic
cable. |
Cellwatch components
Cellwatch consists of 3 main building blocks, which are:
| Battery Monitoring Unit (BMU).
An IBM commercial grade notebook computer with its own battery
back up, running Windows98/ME as well as Cellwatch proprietary
battery monitoring software. This is mounted behind glass, in a
secure locked steel cabinet to avoid tampering. |
| Control Unit (CU).
Interface from the computer's RS-485 serial data bus to
Cellwatch's own proprietary fiber optic network. Also provides up
to 4 current sensor and 4 temperature sensor inputs as well as 4
volts free alarm outputs. |
| Data Collection Module (DCM).
A small electronic measurement instrument capable of measuring up
to 12 volts DC nominal and 39 milli-ohm internal resistance on
each of 4 cell (jar or mono-bloc) inputs. Hence one DCM is
required for every set of 4, 2 volt to 12 volt (nominal)
measurement point. |
Other components of the Cellwatch system include 1000 amp current
sensing 'clamps', solid state temperature probes and Fiber Optic
Network Cable .
Cellwatch software is included in a system and is written as
Microsoft Windows application to be intuitive and informative. It
has a number of standard graphical reports that provide optimal
battery data. The intuitive entry screen shows instantly if
something is wrong.
The system is CE listed in Europe, Underwriter's Laboratories
(UL) listed in the United States, and CSA listed in Canada.
For
more information on
NDSL Cellwatch battery monitoring, contact your nearest
National Power sales representative.
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Click on Conceptual Overview to Enlarge It
Control Unit
Battery Monitoring Unit |
Specifications and Documentation
