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Quantity - temperature.
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Unit - of thermodynamic temperature
is K (Kelvin) or °C (Celsius), which is by definition
equal in magnitude to the kelvin. The kelvin and the
degree Celsius are also the units of the International
Temperature Scale.
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Tasks
of the laboratory |
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The main task of
theLlaboratory is the realisation of the temperature
scale.
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International
comparisons |
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CIPM CCT K-3, EUROMET
552. |
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Temperature (resistance,
liquid-in-glass thermometers)
Range: -39°C to 962°C |
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Available
metrological services |
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Calibration
of resistance thermometers in temperature range from
-39°C to 962°C and liquid-in-glass thermometers in the
temperature range -39°C to 190°C. Type tests of resistance
thermometers. Consulting. |
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| Calibration
at defining fixed points (Standard platinum
resistance thermometers (SPRT) and High
temperature standard platinum resistance
thermometers (HTSPRT)): |
| calibration
at triple point of Hg |
Expanded
uncertainty is 0.7 to 2.5 mK, for k=2 |
| calibration
at triple point of TPW |
Expanded
uncertainty is 0.2 to 1.8 mK/SPRT;2.2
mK/HTSPRT, for k=2 |
| calibration
at triple point of Ga |
Expanded
uncertainty is 0.2 to 2.0 mK/SPRT; 2.2
mK/HTSPRT, for k=2 |
| calibration
at triple point of In |
Expanded
uncertainty is 1.0 to 3.6 mK, for k=2 |
| calibration
at triple point of Sn |
Expanded
uncertainty is 1.0 to 3.7 mK/SPRT; 3.9
mK/HTSPRT, for k=2 |
| calibration
at triple point of Zn |
Expanded
uncertainty is 1.4 to 4.4 mK/SPRT; 6.0
mK/HTSPRT, for k=2 |
| calibration
at triple point of Al |
Expanded
uncertainty is 2.0 to 7.3 mK/SPRT; 7.9
mK/HTSPRT, for k=2 |
| calibration
at triple point of Ag |
Expanded
uncertainty is 4.0 to 8.5 mK/HTSPRT, for
k=2 |
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| Calibration
by comparison (platinum resistance thermometers
(PRT)): combined standard uncertainty of
calibration is 1 mK to 40 mK. |
| Calibration
by comparison (liquid-in-glass thermometers):
combined standard uncertainty of calibration is
0.005°C to 2°C. |
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Methods
of measurement: |
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-
calibration by comparison method or direct measurement at
defining fixed points. |
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Instruments
in use |
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The National Standard (key
comparison CCT-K3 for range from 0°C to 660°C,
EUROMET project 552 in progress for range from
-39°C to 660°C: |
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defining fixed point, |
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thermometers (SPRT), |
| - set
of liquid thermometers, |
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of furnace, |
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resistance bridge. |
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Temperature
(thermocouples)
Range: 0°C to 1553°C |
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Available
metrological services |
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calibration
of thermocouples within given temperature range
(Calibration at defining fixed poits - thermocouples:
calibration at freezing point of In, Sn, Zn, Al, Ag, Au,
Pd. Expanded uncertainty is 0.4°C to 5°C, for k=2. And
calibration by comparison - thermocouples: combined
standard uncertainty of calibration is 1°C to 8 °C). |
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Methods
of measurement: |
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-
calibration by comparison method, wire bridge method or
direct measurement at defing fixed points. |
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Instruments
in use |
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SMU
furnace for temperature fixed points |
Defining
fixed points. Standard-platinum resistance
thermometers. Standard thermocouples. Set of
liquid thermostats, set of furnace, multimeter. |
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| Contact |
| Mr. Ladislav Oravec |
| phone: + 421 2 60294 447 |
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Heat
Range: All types of
measuring instruments produced in the Slovak
Republic and imported to the Slovak republic.
Temperature range of heat-conducting fluids: -
water: 0°C to 200°C; - steam: 100°C to 600°C. |
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Maximum
premissible relative errors of heat meters for water: |
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2 %
to 4 % of RDG for the accuracy class of 2,
4 % to 6 % of
RDG for the accuracy class of 4,
5 % to 8 % of
RDG for the accuracy class of 5. |
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Traceability
to the standards: traceability is ensured using standards
of temperature, pressure, flowrate, electrical resistance
and frequency. |
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Available
metrological services |
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Pattern
testing of calorimetric counters and resistance
thermometers. Verification of calorimetric counters and
temperature sensors. |
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Methods
of measurement: |
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- an
indirect method of the heat consumption determination
using a simulation of heat-conducting fluid volumes or
flowrates and its temperatures. |
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Instruments
in use |
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Centesimal
resistance decades for the temperature simulation.
Sources of electric signal for simulation of flow rate or
volume. Counter, multimeter, electric stop watch and
auxiliary devices. |
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