Specifications

tecal portable dri-block
®
calibrators
2
Tecal Series of Dri-Block
®
Calibrators
The Tecal Block Calibrator series are used as portable temperature calibrators in a wide variety of
industries for checking the calibration of thermocouples, RTDs and liquid filled sensors.
The checking of temperature is vital in many industrial processes – engines, machines, boilers,
pumps, storage rooms, air conditioners and compressors used in power stations, chemical plants,
refineries, off-shore platforms, ships, steel works and instrument companies which are all typical
applications for uses of this type of equipment.
The Tecal series comes in three different models offering from simple, reliable and portable
temperature calibration and also for applications where greater flexibility is required.
The Tecal ‘F’ units are lightweight portable units in 2 versions with or without RS-232.
The Tecal ‘S’ units are designed for Laboratory use and include RS-232.
The Tecal ‘H’ units have programming facilities with a switch test function and RS-232.
With the Tecal ‘S’ and ‘F’ models calibration is simple, quick and easy.
1. Select the temperature scale required (°C or °F) and calibration temperature on the LED display.
2. Place the insert into the hole in the block.
3. Place the sensor under test into the insert.
4. Connect the sensor to reading device (DVM, Digital Thermometer or sensor controlling
circuit etc.)
5. Allow the block to stabilise for at least 10 minutes once it has reached the desired temperature.
6. Compare the temperature reading of the external thermometer with the reading on the Tecal
LED display.
7. Repeat the above steps for all calibration temperatures until the calibration is complete.
The Tecal ‘H’ range allows greater flexibility where several calibration programs may need to be
carried out in the field.
1. The ‘H’ range is fitted with a 4 line by 20 character LCD and an 8 button keypad for creating
and using calibration programs (setting temperature, ramp rate and holding time) and storing
data at each temperature.
2. The LCD and keypad allow the user to configure the calibrator for:
● A normal calibration of temperature probes (analogous to the ‘S’ range).
● A switch test input for monitoring hydraulic thermostats, including the ability to pause
at the temperature where switching occurs (very useful when the temperature for
switch changeover is not known).
● A calibration using the User Probe Interface (UPI), (see page 12) which allows storage of
both the block temperature and the reading of the test sensor which is connected to
the UPI.
● The Tecal ‘H’, ‘S’ and selected Tecal ‘F’ models have an RS-232 interface for data and
program transfer or real time control using Techne Works (see page 11).
The ‘S’ and ‘F’ models require the computer to be continuously connected to the Tecal calibrator
when using Techne Works.
On the other hand, the ‘H’ range can calibrate probes independently of the computer and at the
end of the day, the user can download the test results from the Tecal calibrator to the computer
to print out the appropriate calibration certificate(s).
A set of software commands is available allowing third party software applications to be devel-
oped. For further details, please contact the Techne Sales Department.
All Tecal calibrators have a large heater block (aluminium for the Tecal 140 & 425 models, and
aluminium/bronze for the Tecal 650) which provides optimum uniformity and stability. This heater
block can accommodate large multi-hole inserts allowing calibration of several probes at one
time.
Special inserts are available upon request.
All Techne units are designed and manufactured to BS EN 1S0 9001: 1994 and carry the CE mark.
All Techne equipment conforms to the EMC and Low Voltage Directives.