Temperature in grain stores and silos

Measurement & follow-up
Just one click on the measure icon will
start the manual temperature measurement
of all cables. You can directly
see the measurement progress as
the cable currently queried will be
marked blue. DuoLine soft evaluates
immediately the temperatures and
changes the cable colours in case of
alarm. When the measurement process
is finished the user confirms a
possible alarm background indication
and played sound by clicking on the
“switch off alarm” icon. Then he can
follow-up critical cables step by step:
A right-side-click indicates the table of
current sensor temperatures, a left-sideclick
activates a temperature diagram,
showing the temperature development
of the different sensors over the time
(range of both axis can be changed). If
desired you can zoom in marked areas
and put a pointer to the interesting
curve to see the measured value and
time in exact figures. By this DuoLine
soft supplies all necessary information
soon, well arranged and efficient to the
user. Alternatively it is also possible to
measure only one single cell e.g. for
controlling ventilation, cooling or gassing
progress.
Fully automatic operation
DuoLine soft is designed for a fully
automatic operation. The operator can
define measurement intervals or measurement
times. At the preset times the
software starts the measurement and
gives alarm if the preset alarm criteria
are fulfilled.
When the software runs in background,
the DuoLine STAR soft icon in the task
bar starts flashing in case of alarm.
Printing
DuoLine soft allows to print a protocol
with the temperature readings including
their difference against the former
measurement: All values can be reduced
to critical readings or limit readings
only by using the filter function. The
integrated print preview shows you the
resulting report on the PC screen before
printing. The protocol contains also the
defined limit criteria, measuring
time, user address.
Alarm values are printed
in bold characters.
Pfeuffer GmbH
Flugplatzstraße 70
D-97318 Kitzingen
Phone +49-9321-93 69-0
Fax +49-9321-93 69-50
e-mail info@pfeuffer.com
Historical temperature values stored
in the data base are available for print
protocol as well. Printing the ground
plan and temperature diagrams is also
possible.
We reserve the right to make technical modifications !
Temperature in grain stores and silos
Dust-Ex-Approval according to ATEX 100a*
Simple and intuitive operation
Graphical Temperature curves
Easy installation through bus
Fully automatic control
Integrated data base
Quickly get silo temperatures
under control with the reliable,
efficient and comfortable PC
temperature monitoring system.
* approved in Europe under
no. BVS 03 ATEX E 304
for category II 1/2 D
IP6X T 80°C
Pfeuffer GmbH
P.O. Box 248
D-97305 Kitzingen
Phone +49-9321-93 69-0
Fax +49-9321-93 69-50
Internet www.pfeuffer.com

Temperature Monitoring System
Application
The temperature control inside the
grain store is one of the most important
measures to guarantee storage
quality. Increasing temperatures are an
indicator for pest infestation or moisture
problems. The temperature monitoring
system DuoLine STAR is used for
fully automatic temperature control in
grain stores to recognise and prevent
damages in time. DuoLine STAR can
also be used to control the efficiency of
measures taken for the health preservation,
just as cooling, ventilation and
gassing.
DuoLine STAR System
The sensors are digitally connected
to the PC operated DuoLine soft box by
means of control modules via a fourwire-bus
. In addition to this an external
temperature, humidity and dew point
sensor (option) can be connected to
the bus. The installation efforts are
very small for existing in the same way
as for new buildings! The silo plan is
graphically presented on the PC screen
showing directly the locations of temperature
problems.
The user friendly software
DuoLine soft provides the
complete solution on your PC:
Operation of the system,
fully automatic temperature
measurement and comfortable
evaluation.
Sensors
Flat stores and small silo bins up to a
bulk height of max. 12 m:
Glass fibre probes‚ directly inserted
after the storage bin has been filled
Silos and high stores up to 70 m:
High load sensor cables for the safe
silo operation with suspension head
to be mounted to beams, catwalks
and roof braces; approved for dust
explosion zones 20 and 21
High load sensor cables DLS with base
socket to be mounted on the silo roof
or cast in the concrete ceiling. The
control module is supplied with factory
pre-wirings approved for dust explosion
zone 20 and 21.
Easy installation
The DuoLine STAR-bus allows a fast
and economic cabling. The installation
work is reduced to a minimum, as only
four leads are required for the complete
long-distance cabling. DuoLine STAR
is suitable for serial and star-shaped
installation or a combination of both.
The bus cable is connected to the
DuoLine soft box which handles data
transmission with the PC by USB. Duo-
Line soft runs under Windows 2000/XP
and can easily be installed on every
usual Windows PC.
Software philosophy
DuoLine soft is lean and comfortable.
No need to navigate through
convoluted menus, all frequently used
functions can be activated just with
one mouse click on the corresponding
icon. The DuoLine soft philosophy
is to provide the temperatures graphically
processed and clearly arranged.
Further details can be recalled by
clicking on the desired cable. So the
user can immediately see on areas of
problems in the grain storage and react
immediatelly.
Features
The software allows you to measure,
evaluate and print the temperature
values. In addition the integrated data
base stores all measured data automatically.
Silo cell names, limits, measurement
times, printer text and other
parameters can be set effortlessly. With
the built-in CAD tool you can comfortably
configure the system while drawing
the cables and cells by drag and
drop in the floor plan. Different operation
languages are available and can be
changed “on-line” by the user.
Different alarm criteria
The DuoLine soft offers you the following,
freely definable alarm criteria:
Absolute Limit Value: Cables with
temperatures raising the absolute limit
value e.g. 30 °C will be marked red on
the PC screen.
Critical Area: (so called “hysteresis”)
For e.g. 3 °C it is from 27 to 30 °C.
Cables in the citical area with increasing
values will marked pink while cables
with decreasing temperatures will be
yellow coloured.
Delta Alarm: Increases a temperature
e.g. by 5 °C in 7 days alarm is indicated
by a purple cable.
The alarm criteria can be defined generally
or cell specific. You can also select
certain sensors for non-consideration
during alarm evaluation (e.g. top sensor
for partly filled steel silos).
In case of alarm the background of
the ground plan will get red showing
“ALARM” and the DuoLine soft icon
in the task bar stats flashing. A user
defined sound file can be played by the
PC supplementary.