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TTI-22 Iss.04– 11/15
Appendix A: Technical Data
The following specifications are related to an ambient temperature of +23 °C.
Find these terms explained in Basic Terms in Metrology 1319 Part 1-3.
A.1
TTI-22 as High-precision Resistance Meter
Internal reference resistance:
approx. 380
Ω
Resistance measuring range:
approx. 0-440
Ω
Resolution (0.1 ppm f.s.
a
):
40 µ
Ω
Linearity error (< 1 ppm f.s.):
< 0.4 m
Ω
Measuring uncertainty
b
:
< 0.4 m
Ω
(confidence level: 95 %,
Number of measuring values: 50)
a
f.s. = full scales
b
This value does not include the calibration uncertainty of the used reference resistor.
A.2
TTI-22 as High-precision Thermometer (Specifications without Sensor)
Pt 100, DIN IEC 751
Temperature measuring range:
-200 °C to 850 °C
(depending on sensor)
Resolution:
0.1 mK
Linearity error (< 1 ppm f.s.
a
):
< 1 mK
Measuring uncertainty
b
:
< 1 mK
(confidence level: 95 %,
Number of measuring values: 50)
Sensor:
Platinum sensor up to a resistance of 440
Ω
a
f.s. = full scales
b
This value does not include the calibration uncertainty of the used reference resistor.
