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Surface correction
Surface probes conduct heat from the surface being measured
following the first contact. For this reason the measured result is
lower than the true surface temperature without the probe (the
opposite arises in the case of surfaces which are colder compared
to the ambient temperature). This effect can be corrected with an
addition in percentage of the measured value.
Data is input in the main menu under
PROBE
-
S
URF CORR
and can
be defined differently for probe socket 1 or 2 (maximum 30 %).
All of the temperature probes are corrected with the input values
regardless of the chosen location. In EEPROM probes the corrected
value is stored in the probe.
The globe thermometer 0554.0670 (D = 150 mm) is used to
measure radiation temperature in accordance with ISO 7243, ISO
7726, DIN EN 27726, DIN 33403.
Globe thermometer
Temperature measurement
t
95
, k factor, quick final value extrapolation
This function can only be used to the full when used with
testo Comsoft
software. It is particularly suited to slow
temperture probes with a large thermal mass.
Measuring:
During a test measurement, a jump in temperature is
recorded with an EEPROM probe.
The time constant of probe under given conditions for quick final
value extrapolation is determined and stored in the instrument via
the automatic learning function available in the PC software.
You can set and change this value in the instrument (in main menu
under
PROBE
-
T
95
-
fast)
. With the help of the k factor a small
change in temperature in the starting phase of a temperature jump
is amplified and extrapolated to the expected final value.
k= 0:
Function without effect.
k=50.00
Maximum amplification possible
Depending on the probe, the optimum k value is between 0 and 50.
If the set k value is too small for the probe, the display reacts too
slowly to a temperature jump. If the k value is too big the displayed
value overshoots.
(Please refer to the Comfort software instruction manual for more
detailed information).
For quick measurements on location, assign one of the function
buttons with t-
95
and set the location required. Activate the function
by pressing the function button (the measurement on location must
correspond physically to the previous
practice measurement
). The
function is deactivated by pressing the function button again.
Temperature measurement
