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2. Thermal stabilisation
D30Xy modules have an internal temperature mesurement function. When the module is turned
on the probe LEDS flash until the temperature is stabilised (about 10 minutes from a cold power
up). Although the module is ready for measuring from the time it is powered up it is advisable to
redo a preset after the stabilisation period.
3. Indicators
3.1 Power LED
The LED is green if the module power supply is in the specified range. It is red if the voltage is
not within the range. The LED flashes if there is a temperature measuring error. In this case, the
module is ready for measuring all the same but it is advisable to wait for at least 10 minutes of
thermal stabilisation after each cold power up.
3.2 Probe LEDs
Each LED is green if a probe is connected to the corresponding input. The LED is red if a probe
error occurs. It is switched off if the corresponding channel is not activated The LEDs flash during
the thermal stabilisation period.
E
3.3 Rx/Tx LEDs
The LEDs indicate activity on RS232 and RS485 buses.
They stay on constantly if there is a critical error in the flash memory.
4. Calibration
4.1 Module calibration
Module calibration consists of entering 2 reference points along the path of the probe and speci-
fying the movement between these two points. This must be repeated for the other channels if
necessary.
The module is calibrated at the factory with a standard probe. If the module is not calibrated the
corresponding channel LED turns red. Calibration is performed by the CAL remote command.
4.2 Calibration procedure
For an optimum result it is advisable to perform the calibration procedure when the module is in a
state of perfect thermal stabilisation, i.e. at least 2 hours after being powered up. If the module is
not thermally stabilised calibration is not possible. The module returns TEMP ERR.
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