PRESYS Instruments T-25N
Page 1
1 - Introduction
T-25N
T-25N dry block calibrator controls temperature of an insert in order to calibrate
thermocouples, thermoresistances, glass thermometers, thermoswitches etc. Besides
providing high accuracy temperature values, it also allows the measurement of signals
generated by thermo-elements like thermocouples, thermoresistances and thermos-
witches, which are being calibrated. This is possible due to an embedded calibrator
specific for these types of signal, including 4-20 mA. Thus, it incorporates the functions
of dry block, standard thermometer and calibrator for RTD, TC and also mA. The
calibrator also includes an external probe input to allow the temperature control from a
standard PRT sensor (optional) placed in the insert together with the sensors to be
calibrated. The sensor calibration curve is configured according to the Callendar-Van Dusen
parametrization.
T-25N calibrator model generates temperatures from -25 ºC to 125 ºC (-13 ºF to
257 ºF).
Presents input for thermocouples, thermoresistances, thermoswitches. Besides
generating temperature, it measures the signal from the sensor being calibrated.
Allows the control of the dry block temperature by using an external probe (optional).
The temperature calculation uses Callendar-Van Dusen coefficients.
Makes no use of external standard thermometer.
Carries out completely automatic calibrations with or without the use of a computer.
Accuracy to 0.1 ºC, stability of 0.02 ºC and resolution of 0.01 ºC.
Documenting capabilities: communication with computer and the ISOPLAN-5
Calibration Software.
Portable, compact, provides interchangeable inserts and carrying case.
It presents a wide variety of programming resources, allowing the performance of
automatic calibrations of thermocouples, thermoresistances, thermoswitches. In this
case, the sensor is placed in the insert and its electrical terminals are connected to the
embedded calibrator. The operator defines the calibration points and the number of
repetitions, then the process is started and all the sequence is automatically
accomplished.
