Greisinger GMH 3750 Digital Thermometer 601866 Benutzerhandbuch
Produktcode
601866
H49.0.02.6C-06
Operating Manual GMH 3750
Page 8 of 16
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9 Special Functions
9.1 Display Resolution
Standard setting: 'Auto', i.e. the device automatically switches over to the optimum resolution
between .01° and 0.01°.
If temperatures to be measured are near the switching threshold, a fixed resolution may be better,
e.g. for easy manual recording. In such a case please set the optimum resolution to the desired
value.
between .01° and 0.01°.
If temperatures to be measured are near the switching threshold, a fixed resolution may be better,
e.g. for easy manual recording. In such a case please set the optimum resolution to the desired
value.
9.2 User Sensor Curve ('Lin USEr')
By means of this function besides the standard conversion of resistance to temperature following
EN60751(Lin E.751) also other curves can be used. The user sensor curve can be read and edited
by the configuration software GMHKonfig. The standard setting ex works is also set to the
EN60751 data. The curve is defined by a table with two columns (input resistance[Ohm]/output
temperature [°C]) with 50 rows.
Info: the sensor curve following EN60751 uses the international temperature scale ITS90 and
following formulas:.
Temperatures < 0°C:
EN60751(Lin E.751) also other curves can be used. The user sensor curve can be read and edited
by the configuration software GMHKonfig. The standard setting ex works is also set to the
EN60751 data. The curve is defined by a table with two columns (input resistance[Ohm]/output
temperature [°C]) with 50 rows.
Info: the sensor curve following EN60751 uses the international temperature scale ITS90 and
following formulas:.
Temperatures < 0°C:
R
neg
(T) := 100 · [1 + 3.9083·10
-3
·T – 5.775·10
-7
·T
2
– 4.183·10
-12
·(T – 100)·T
3
]
Temperatures >= 0°C:
R
pos
(T) := 100 · (1 + 3.9083·10
-3
·T – 5.775·10
-7
·T
2
)
Please notice: Temperature measurements with the user sensor curve are allowed only within
the temperature range which has been used to generate the user sensor curve.
Measuring with activated user sensor curve beyond the checked temperature range may
lead to larger errors. Therefore the sensor curve acc. to EN 60751 (Lin E.751) has to be
used for temperature measurements beyond the checked temperature range.
Measuring with activated user sensor curve beyond the checked temperature range may
lead to larger errors. Therefore the sensor curve acc. to EN 60751 (Lin E.751) has to be
used for temperature measurements beyond the checked temperature range.
9.3 Zero Displacement ('Offset')
The zero displacement is used to adjust the measuring display for probe deviations.
temperature displayed = temperature measured - offset
Standard setting: 'off' = 0.0°, i.e. no zero displacement will be carried out. Together with the scale
correction (see below) this factor is mainly used to compensate for sensor deviations.
Unless the factor is set to 'off', the offset arrow in the display shows an active zero displacement.*)
correction (see below) this factor is mainly used to compensate for sensor deviations.
Unless the factor is set to 'off', the offset arrow in the display shows an active zero displacement.*)
9.4 Scale Correction ('Scale')
The scale correction is used to adjust the measuring display for probe deviations. (factor is in %):
displayed temperature[°C] = measured temperature[°C] * (1+Scal/100)
or: displayed temperature[°F] = (measured temperature [°F]-32°F) * (1+Scal/100) + 32°F
Standard setting: 'off' =0.000, i.e. temperature is not corrected.
Unless the factor is set to 'off', the Corr arrow in the display shows an active scale correction.*)
Unless the factor is set to 'off', the Corr arrow in the display shows an active scale correction.*)
*) The standard curve (Lin E.751) and the user sensor curve (Lin USEr) posses separate
correction settings.