AccuMac AM8060 - Manual (Page 14)

AM8060 Precision Thermometer
User’s Guide
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4.5.2.4 If the sensor type is SPRT, the adjustable
parameters are Rtp, a, b, c, a4 and b4. The details of
these parameter definitions can be found from the ITS-
90.
As an example, calibration agencies provide following
parameters after SPRT is calibrated:
Rtp: probe’s resistance at triple point of water.
a4 and b4：low temperature range parameters.
a, b and c：high temperature range parameters (b and c can
be “0” for some instances. (Please refer to ITS-90 for more
information.)
If the sensor type is IPRT, the adjustable parameters are R0,
A, B and C:
The details of the parameter definitions can be found from
the industrial platinum resistance thermometer calibration
procedure.
As an example, calibration agencies provide following
parameters after IPRT is calibrated:
R0: the probe’s resistance at 0°C.
A and B: the temperature coefficients at temperature range
above 0°C.