The following article was published
Posted on July 14, 2004
THE Eurotherm 5180V 180mm video graphical
recorder's latest firmware update allows for the direct calculation
of time at sterilization, providing guaranteed sterilization periods
This new function eliminates any guess work in determining if the
appropriate amount of sterilization has been provided to the instruments.
This system is ideal for all hospitals, medical laboratories as
well any application where sterilization is required, including
This new function is part of the advanced mathematics functions
incorporated in the 5180V, enabling calculation of the 'equivalent
time at sterilising temperature' for temperatures above, at, and
below the sterilizing temperature.
Calculations for both dry and steam sterilizing environments can
be carried out, by entering the appropriate constant in the simple
to use embedded calculation.
The value can be held, using a 'Disable' job or set to zero (prior
to the next run) using a 'reset' job. The function value is retained
during power off.
User configuration consists of entering the channel which is measuring
temperature, the relevant sterilizing temperature and temperature
interval and a low cut-off value, below which killing credits are
not to be counted if required.
To ensure that sterilizer loads which contain materials with differing
thermal inertias are thoroughly sterilized, a typical sterilizer
has up to 12 different measuring points within the load.
To ensure accuracy, the temperature sensors should be calibrated,
and the channel adjustment facility used to compensate for any inaccuracies
If each of the inputs is used to compute an F value, each of these
values can then be used as an input to a Group Minimum function,
with a high absolute alarm set at the correct F value.
The alarm output can be used to sound a warning, or an associated
relay can be linked into the autoclave control system to signify
the end of a sterilization cycle.
Equilibration time begins when the drain sensor achieves the sterilizing
temperature. It ends when the load sensor achieves the setpoint.
Holding time begins when all sensors have passed the sterilizing
temperature and ends when the first sensor falls below it.
Up to 96 channels of data can be recorded via direct analogue inputs,
Modbus RS232/RS485 Serial data or Ethernet TCPIP modules. Provided
with Ethernet comms as standard, processes can be directly monitored
on an existing office computer network via the 5000 Series allowing
monitoring and charting in real-time from any desktop PC.
The user has the choice of either automatically downloading the
data via the Ethernet comms on demand or the system can be setup
to automatically download the data, thus eliminating the possibility
of data loss from memory overflow.
Data is stored in an encrypted format, ensuring data security and
reliability, allowing the 5180V to be using in applications where
FDA or EPA regulation needs to be met.
The 5180V has a large 180mm full colour TFT LCD touch screen with
a simple to use user interface. The touch screen user interface
allows the user to easily access bars and trend graphs, alphanumeric
displays as well as customised user displays.
It can also be upgraded via simple keycodes on site to add additional
features such as advanced maths, totalisers and counters, batch
control, full audit trail complete with digital signature security
meeting CFR21 Part 11.
Fully automated data management and archiving software is provided,
ensuring data is never lost and allows users to chart recorded data
and print in either a graphical or spreadsheet format or export
to programs such as Excel.
Real-time viewing and configuration is also available providing
live data to be monitored on any PC connected to the network.