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UM Temp74 PT100 Vio EN rev.1 19.05.2023
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Offset adjustment
All instruments are factory pre-calibrated and remain stable over time, but in the event of a reading error, the
measuring chain can be recalibrated to eliminate this error.
In the setup menu - Temp Settings - Probe Offset it is possible to adjust the measurement of each individual
channel independently or to align the measurements of all channels to the reference channel.
Example: Single channel calibration at 0.0 °C
To recalibrate the instrument at 0.0°C, proceed as follows:
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prepare ice with double-distilled water;
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put ice cubes in a 500 ml beaker up to half the volume;
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add double-distilled water to ¾ of the volume;
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place the beaker on a magnetic stirrer under gentle agitation;
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immerse the probe in the beaker, ensuring that it is immersed in water and does not touch the beaker wall;
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cover the beaker with polystyrene to isolate the water/ice mixture from the air as much as possible;
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leave to stir for about 10 minutes;
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wait until the temperature reaches 0°C.
If the instrument reads 0.0°C (± measuring chain accuracy), this means that the measuring chain is correctly
calibrated. Otherwise:
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access the Setup menu
Temp Settings
Offset probes;
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select the channel to be adjusted;
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the display will show the current temperature, which is to be corrected, and the adjustment value, with
flashing cursor;
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using the keys
correct the value to 'Current Temperature' to 0.0 °C;
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press
to confirm and record the adjustment.
Note
: The adjustment affects the entire measurement scale, e.g. if you correct by -1.0°C, then the
measurement shifts by -1.0°C over the entire range.
The setting made in this way remains in memory
both after switching off the instrument and in case of
replacement of batteries.
If the sensor is replaced, we recommend resetting the factory calibration from the Temp Settings
menu
Reset and proceed with a new calibration if necessary.
If the sensor is replaced, we recommend resetting
the factory calibration from the Temp Settings menu
Reset and proceed with a new calibration if necessary.
If there is no probe connected to the selected channel, the offset cannot be changed.
D Software
It is possible to connect the Temp 74 to a PC and use the D software to perform data downloads,
recording directly on the PC and exports to Excel and PDF.
The software can be downloaded free of charge from the site:
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https://www.giorgiobormac.com/it/download-software_Download.htm.
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Connect the USB cable inside each package to the USB port on the top panel of the instrument and the other
end to a COM port on your computer.
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Only use the USB cable supplied with each instrument.
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Start the programme and then switch on the instrument.
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Wait for the connection to be established (connection data are shown at the bottom left of the display).
