SIT Centre No.124
Metrological Laboratory

TEMPERATURE MEASUREMENTS

Our SIT Calibration Centre No.124 is accredited for the following measurements:
- 196°C Nitrogen Point
- 80÷1250°C

PDF certification

DELTA OHM instruments but also any other instrument and probe can be SIT certified

The SIT certificate has to be requested at the time of placing the order , otherwise the instrument has to be sent back to our company for certification

The zero point is always carried out

In SIT calibration of the probe alone, data tabulation is obligatory

At the time of placing the order the calibrating points have to be stated

The quantity of the calibrating points, according to the selected range, is suggested by the Primary Institute

The measuring range is in accordance with the probe dimensions, as follows:
MAXIMUM OPERATIVE TEMPERATURE FOR SIT CALIBRATIONS DEPENDING ON THE LENGTH OF THE PROBE STEM
MINIMUM STEM LENGTH MAXIMUM TEMPERATURE
from 100 mm
 120°C
from 230 mm
 250°C
from 350 mm
 550°C
from 480 mm
 1050°C
MINIMUM OPERATIVE TEMPERATURE FOR SIT CALIBRATIONS DEPENDING ON THE LENGTH OF THE PROBE STEM
MINIMUM STEM LENGTH MINIMUM TEMPERATURE
from 150 mm
 -80°C
from 250 mm
 -196°C

UNCERTAINTIES WITH WHICH THE SIT CENTRE WAS APPROVED FOR TEMPERATURE MEASUREMENTS
SIZE INSTRUMENTS CALIBRATED MEASURING RANGE UNCERTAINTY NOTE
Temperature
THERMOCOUPLES
 -196°C
-80°C ... 250°C
250°C ... 600°C
600°C ... 1100°C
1100°C ... 1250°C

 0,4°C
0,3°C
0,4°C
1,0°C
2°C
Resistance thermometers
 -196°C
-80°C ... 0°C
0°C ... 100°C
100°C ... 250°C
250°C ... 600°C


 0,20°C
0,15°C
0,05°C
0,10°C
0,20°C
Thermometric chains Indicators for thermocouples
and resistance thermometers
 Measuring range of the probe used
U + RS
 1,2
Thermometric chains Transmitters for
thermocouples and resistance
thermometers
Measuring range of the probe used
U + RS
 1,3
Calibrators-Simulators
National and international standards TFL+RS 2,3
Calibrators-Simulators
TFL+RS 2,3
The measuring uncertainties are express as twice the standard deviation, corresponding in the case of normal distribution to a confidence level of about 95%.

1) U is the uncertainty value of the probe depending on the measuring range
2) RS is the resolution of the instrument (1 digit or ½ division)
3)TFL is the type of function (laboratory measurements):
- * Resistance thermometers (Pt100): 0,05°C;
- * Base metal thermocouples: 0,2°C
- * Noble metal thermocouples: 0,4°C

CERTIFICATION OF PROBE/SENSOR ALONE * INDICATORS IN LINE WITH THE PROBE * CALIBRATORS METERS/SIMULATORS
TABULATION 1°C
0.5°C
NITROGEN POINT -196°C
THERMOMETERS WITH A PLATINUM RESISTANCE

Indicator in line with a platinum probe
-76 ÷ -41°C
-40 ÷ 100°C
-20 ÷ 100°C
0 ÷ 200°C
0 ÷ -400°C
0 ÷ 600°C
-40 ÷ 600°C
4 Punti
5 Punti
4 Punti
4 Punti
5 Punti
6 Punti
8 Punti
THERMOCOUPLES

Indicator in line with a TC probe
-76 ÷ -41°C
-40 ÷ 100°C
-20 ÷ 200°C
0 ÷ 250°C
0 ÷ 450°C
0 ÷ 600°C
-20 ÷ 600°C
0 ÷ 1000°C
-20 ÷ 1000°C
600 ÷ 1100°C
660 ÷ 1250°C
4 Punti
5 Punti
4 Punti
4 Punti
5 Punti
6 Punti
6 Punti
8 Punti
8 Punti
8 Punti
CALIBRATORS SIMULATORS
for thermocouples and resistance thermometers		 N° 8 equidistant points in the measuring range
for each probe requested (J,E,T,K,R,S,B,Pt100,etc.)

Delta OHM - Via G.Marconi,5 35030-Caselle di Selvazzano (PD)
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