Frequently
asked questions and answers
What is the Thermochron iButton™?
Which are some of the applications for the Thermochron
iButton™?
Can the T-Logger View Software be installed in more
that one computer ?
What is the highest temperature that can be
placed the Thermochron iButton™?
What is the expected life of a Thermochron
iButton™?
How can I know if the lithium battery in the
Thermochron iButton™ is low or used up?
What does “water resistant” mean in the Thermochron
iButton™?
Can the Thermochron iButton™ be used in fluids that
are conductors?
How do I turn off the Thermochron iButton™?
How can I use the Thermochron iButton™ in real time
without programming a mission?
How much information can be saved in a disk file using
the Thermochron iButton™ in real time?
Can the information from real time readings be used to
control processes?
What is the alarms checker ( TL-AC )?
What
is the Thermochron iButton™?
It is a device that measures and records temperature. It has the capacity to do real time readings.
The Thermochron iButton™ DS1921, made by
Which
are some of the applications for The Thermochron iButton™?
Some
of the most typical applications for the Thermochron iButton™ are:
Can
the T-Logger View Software be installed in more that one computer ?
No. Each T-Logger View Software has a unique license for its use in one
computer. The software has a CODE that will appear on your computer
screen the first time you run the program. You need to send our company an E-mail
with this CODE in order to get a PASSWORD. You will only need to
enter this password the first time that you run the program. The T-Logger View Software EDS version has
the ability to work with you existent
I already have the DS1921K
Thermochron iButton™ Kit from
Yes. One of the advantages of the T-Logger View Software
is that it can be used with any 1-Wire serial, parallel, or USB adaptor. Also,
our software can be used with any Thermochron iButton™ DS1921.
What
is the highest temperature that can be placed the Thermochron
iButton™?
Storing temperature: - 40°C to
+70°C; yields maximum lithium life during storage.
Working temperature: - 40°C to +85°C.
What is the expected life of a Thermochron iButton™?
The Thermochron iButton’s expected life is 10 years or one million temperature
conversions at 50 °C or less, whichever comes first.
How
can I know if the lithium battery in the Thermochron iButton™ is low or used
up?
One can use the total record of conversions (Total Samples) in order to know
if the battery is low or has been used up. The conversion circuit accounts for
most of the battery’s consumption; therefore, you can estimate the battery’s
charge level by checking the number of conversions that have been done. The
total samples registry works like an odometer.
What
does “water resistant” mean in the Thermochron iButton™?
The Thermochron iButton™ has a water resistant seal; however, the iButton™ is
not hermetic. It can be submerged in
water for short periods of time and at a maximum depth of one (1) meter without
problems.
Can
the Thermochron iButton™ be used in fluids that are conductors?
Dallas Semiconductor conducted trials a few years ago
in salty atmospheres for applications in coastal regions. 10 iButtons™ were
used in the test. A saline spray was applied to the iButtons™ for 96 hours.
There was no evidence of malfunction of the iButtons during that time. The
trial was done following the Mil-Std-883C norm, method 1009, C no
electricity.
How do I turn off the Thermochron iButton™?
Using the T-Logger View Software, you can select the option “Slepp
T-Logger” from the main menu. A confirmation menu will appear before the
Thermochron iButton™ is inactivated (its internal clock will be stopped). It is
recommended that you sleep the Thermochron iButton™ if you will not be using it
for long periods of time. By doing this, the iButton™ will use little energy
and its battery will have a longer life. To re-activate the iButton™, you
simply need to program a new mission using The T-Logger View Software.
The Thermochron iButton™ will wake up automatically.
How
can I use the Thermochron iButton™ in real time without programming a
mission?
Using the T-Logger View Software chose the option
"Real Trending" from the main menu. Real Trending allows
the user to see a temperature vs. time graph. You will not need to program a
mission. You will only have to determine the sampling intervals and the values
for the activation of the alarms. The use of the real trending graph is a great
feature that allows an instant response to temperature variations.
How
much information can be saved in a disk file using the Thermochron iButton™ in
real time?
Can
the information from real time readings be used to control processes?
Yes, using dynamic data exchange (DDE). DDE is a technology for
the communication between applications. It uses the standard protocol for
communications in the Microsoft Windows Operating System and allows
applications to establish communication and exchange information. The T-Logger
View Software program simplifies the exchange of information by specifying the name
of the application, the topic, and item to be exchanged. The
four items that can be exchanged are:
What is the alarms checker ( TLALC )?
It is a device designed to read the Thermochron’s
alarm registry without the need of a computer. It is cordless, uses batteries,
and includes a bicolor LED to identify if an alarm has occurred during the
mission.