Presys T-25N, Техническое руководство

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PRESYS

Instruments T-25N
Page 13
2.4 - Programmable Operating Mode
Pre-configured programs can be loaded from the calibrator memory, enabling the
programmable operating mode. The temperature programmed values of the block are
used directly, with no need to enter the setpoint.
The display shows STEPn beside the block temperature setpoint value in the
programmable mode. The number of the program is indicated by n . Using the keys

and

, the programmed values of temperature setpoint are changed. The numeric
keypad continues available for manual selection of the block temperature in the same
way of the manual operating mode.
The automatic scan over the programmed temperatures is implemented by
defining the stabilization time of the thermo-element in the block.
The key

enables the automatic scan over the points. When pressed, the
message STEPn gives place to 0s and the calibrator waits for the stabilization time
configured from 1 to 9 minutes, by the keys 1 to 9 . The automatic scan is disabled by
pressing key

again.
A countdown of the stabilization time is only started when the block temperature
reaches the programmed temperature and stabilizes within a range of approximately
 0.05 ºC. At this time the buzzer beeps, in case it is configured to
YES
.
2.5 - Automatic Operating Mode
The thermo-element calibration is performed in an automatic way by the T-25N
calibrator. The configuration, as well as the calibration verification is carried out by the
calibrator itself. Also it is possible to use the ISOPLAN-5 software and its work orders,
like a CAC - Computer Aided Calibration.
The independent automatic calibration, without the use of ISOPLAN-5, is planned
in the option TAGMAN from menu COM .
TAG EXEC VERIF
ADDRESS

TAGMAN
Before you start programming, configure first the signal that will be read by the
calibrator in the menu IN . To calibrate glass thermometers, for example, there is no
electric signal to be read. In this case, option IN from the menu must be configured to
NO and the calibrator will ask to enter the value indicated by the thermometer, at the end
of the stabilization time of each calibration point.
The data for an automatic calibration concern:
 TAG : the thermo-element tag identification.

SP
: the block temperature reference values for the calibration (calibration points).
 TOL : the maximum tolerance for the thermo-element operation.

STB
: the stabilization time, in seconds, so that the thermo-element temperature
indicates correctly. This timer starts just after the block reaches and stabilizes at the
setpoint temperature.