Presys T-25N, Техническое руководство

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PRESYS

Instruments T-25N
Page 14
 STR : the calibration strategy of the programmed reference values. The available
strategies are:

(UP),

(DOWN),

(UP - DOWN),

(DOWN - UP),

(UP - DOWN - UP) and

(DOWN - UP - DOWN).
 RP : the strategy number of repetitions.
 RGI : the thermo-element indication range.
 RGO : the operating temperature range that corresponds to the indication range
above.
The automatic calibration begins when the option EXEC from menu COM is
selected. All the operations are automatically performed by the T-25N calibrator. The
keypad does not work until the end of the calibration.
At the end of the stabilization time, the calibrator stores the thermo-element
reading in memory and goes to the next point, in case some input signal has been
previously configured in the menu IN and connected to the calibrator terminals.
The CALIBRATION END message appears on the display at the end of the
automatic calibration. Press ENTER to confirm. The results can be verified in option
VERIF from menu COM .
The first message in option VERIF informs the calibration result, with the number
of points that have succeeded. Following, press ENTER to verify each one of the
readings performed by the calibrator. The keys

and

interchange 2 screens: one
that displays the block and thermo-element temperature value and the other displays a
message indicating the calibration point number and its state ( OK or FAIL ), besides the
error value in %.
The option TAG from menu COM can present a list of up to 4 tags that have been
downloaded or uploaded with the ISOPLAN-5 software. The key ENTER selects the tag
to be calibrated from the tag list. The automatic calibration starts by the option EXEC
from menu COM and the calibration data can be verified in option VERIF . To calibrate
automatically not using ISOPLAN-5, there is a reserved place for one manual tag. The
selection of the manual tag is performed by confirming the option TAGMAN with the key
ENTER .
The option ADDRESS selects the communication address of the T-25N calibrator.
The communication protocol used is ModBus - RTU, with no parity and baud rate of
9600. The calibrator communication with the computer can use RS-232 or RS-485, for
network option, according to the communication interface used. In order to communicate
with the ISOPLAN-5 software, configure ADDRESS to 1.