PCE-T395
contact
thermometer
for measurements over an extended period, with memory, RS-232 interface and software
The
PCE-T395 contact thermometer is a digital device with four
input channels powered by batteries and has memory for
storing up to 16,000 readings (4000 per channel). The
software of the contact thermometer is in English and comes included in the order,
making it possible to read values stored in the thermometer's memory. This data can be transferred to
a computer allowing for analysis of temperature readings.
Time intervals can be programmed for using the contact thermometer
as a data logger ensuring that all readings get stored over
an extended period of time. Another model of contact thermometer
available is the
PCE-T390
which has various channels allowing for the connection of
temperature sensors / type-K thermal elements but does not
have an internal memory. The contact thermometer can be
used as a data logger while connected to a computer. This is
to say that measurements can be made in situ or the contact
thermometer can be programmed to take measurements when the
user requires. The display simultaneously shows the
temperature readings of all four channels when they have
four sensors connected. Follow this
interface protocol link for contact thermometer and you
will find a short extract. The PCE-T395 contact thermometer can be
DIN ISO
calibrated,
including a corresponding control certificate.
If you need a contact thermometer with a highly accurate PT-100
sensor, see the
PCE-317
contact
thermometer. If you wish to see another type of contact thermometer,
click
here.
- for type-K thermal elements with small standard
connectors (4 can be connected)
- with internal memory for 16,000
readings
(with 4 sensors connected, 4000 values per channel)
-
different
temperature
sensors are available for use with the
contact thermometer
and can be ordered seperately
±0.2% of reading (-200 to 200°C) ±0.5% (200
to 400°C) ±0.2% (400 to 1,370°C)
Measurement
frequency
1 to 3599 sec. (adjustable)
Inputs
4
(can be adapted to 1, 2, 3 or 4 thermal elements at a
time)
Memory
16,000
readings
Minimum
system requirements
CD drive, Windows 95 or better,
minimum 486-100 MHz, 16 MB RAM, 5MB of hard drive space to
install
Sensor inputs
4
small standard inputs
Display
3.5 digit LCD with date and time
Power
9V battery, rechargeable or main
adaptor
Auto shut-off
The contact thermometer shuts
off after 30 minutes of inactivity. This function can be
disabled.
Operating temperature
0 to 50°C, <90% r.h.
Dimensions
184
x 64 x 30mm
Weight
250g (with batteries)
Temperature units
Temperature is a physical magnitude
that expresses the degree or level
of hot or cold of our bodies or of
the environment. In the
international system of units, the
unit of temperature is the Kelvin.
Below we will speak generally about
other units of measurement for
temperature.
First we must distinguish between
two categories of measurement units
for temperature: absolute and
relative.
-
Absolute are those related to
absolute zero which is the lowest
theoretical temperature possible and
corresponds to the point at which
molecules and atoms have the lowest
level of thermal energy possible.
- Kelvin (international
system): represented by the letter
'K' and does not use the 'º' symbol
repre-senting degrees. It was created
by William Thompson upon the basis
of degrees
Celsius, establishing point zero as
being absolute zero (-273.15 ºC) and
conserving the same dimensions for
degrees. This was established as
part of the international system of
units in 1954.
-
Relative because they compare with a
physical-chemical process
established that always produces the
same temperature.
- Degrees Celsius (international system):
or also referred to as degrees
centigrade is represented by this
symbol: ºC. This unit of measurement
defines the freezing point of water
as being 0º and the boiling point of
water as being 100º,
both measurements at an atmospheric
pressure and divided into a scale of
100 equal parts in which each one
corresponds with 1 degree. This scale
was proposed by Anders Celsius, a
Swiss physicist and astronomer, in 1742.
- Degrees Fahrenheit (international
system): this takes the division of
the points between freezing and
evaporation of an
ammonium chloride solution.
This was proposed by Gabriel
Fahrenheit in 1724, establishing
zero and one hundred in the scale as
being the freezing and evaporation
points of
ammonium chloride in water.
This used a mercury thermometer in
which is introduced crushed ice and
ammonium chloride in equal parts.
This concentrated saline solution
gave the lowest possible temperature
in the laboratory at that time.
Later, another mix of crushed ice
and pure water was used, that
determined the point of 30ºF, which
after was fixed at 32ºF (fusion
point of ice) and later the
contact thermometer showed
water vapour
occurred at 212ºF (boiling point of
water). The difference between these
points is 180ºF, that is divided
into 180 equal parts determining
degrees Fahrenheit. The PCE-T395
contact
thermometer can measure in degrees Celsius
and in
Fahrenheit.
The PCE-T395 contact thermometer
can be used for taking measurements in situ and thanks to
its internal memory it can take readings over an extended
period of time for such applications as: -
Maintenance,
diagnostics, and analyzing machines - Research and
development, product development -
Quality
control, production and process analysis Here you
will find another contact thermometer with one channel,
memory, RS-232 interface and software.
Examples of use for the multiple
channel contact
thermometer.
Measuring two different parts of
a motor at the same time.
Measuring the temperature of a
car's motor using a wire sensor.
View of the backlit display when
there is insufficient lighting.
Measuring the temperature
of a car's heating system.
Software for the PCE-T395
contact
thermometer
Software for the PCE-T395 contact thermometer
The following image shows an
extract from a temperature curve (diagram X - T) saved by
the PCE-T395 contact thermometer. All the readings saved in the
contact thermometer can be exported to programmers such as Excel.
The contact thermometer can be
configured via the keypad or by using the software. The
following video shows the control panel (with the saved
measurement curve). Data can be shows graphically or in
spreadsheet format on the contact thermometer or via the software.
Contents PCE-T395
contact thermometer, 2 type-K hot-wire sensors, battery,
software with data cable and user's manual
ISO
calibration and certification
An ISO calibration
certificate can be purchased for this contact
thermometer. It includes a control document
containing the contact details of the company and
also contains a laboratory calibration and the
certificate to ISO standards and will show that the
contact thermometer meets the minimum requirements of the
national body for measurements. More information
with respect to:
Calibration:
Control of the correction of the magnitudes of
measurement for the contact thermometer, without
intervention in the measurement system, or the
determination of the systematic deviation of the
display with respect to the real value of the
magnitude of the measurement.
Calibration document or certificate:
document of the technical properties of the device
according to the national organization of
measurement.
Calibration interval: to
make correct measurements, devices must be
calibrated at regular intervals. This period of time
is called the calibration interval. It's
difficult to accurately determine this time period
but to help you should consider the following
factors:
Performance of the measuring instruments
Frequency
of use
Operating
conditions
Stability
of previous calibrations
Required
measurement accuracy
Determining factors of the quality control systems
used by companies
This means that the same user should check and
control the interval between calibrations. We
recommend that this internal between calibrations
should be between 1 and 3 years. We can also offer
our expert advice to resolve any doubts relating to
the process of establishing a calibration interval.
Take
into consideration:
When a contact thermometer is calibrated, this
should be done while the temperature sensor being
used with the device is attached or with the sensor
that came with the contact thermometer attached. The
accuracy of the calibration depends on the device
and the sensor combined. In the case of the PCE-T395
contact thermometer this means that the calibration should
be done for up to four temperature sensors.
