Additel 221A Multifunction Temperature Calibrator User Manual - Manual (Page 57)

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interpolation equations.
The calibrator uses the first and last deviation function for the calculation for SPRT.If you use other temperature ranges,
and can be assigned to zero (i = 7, 8, 9, 10, 11).
The table 9‐1 list the sub ranges, required calibrated in the NIST SPRT Laboratory.
Table 9‐1
Temperature range(
℃)
Required Fixed Points Deviation Function
-189.3442 to 0.01 Ar TP, Hg TP, TPW ∆
0 to 29.7646 TPW, Ga TP ∆ 1
0 to 156.5985 TPW, GaTP,In FP ∆ 1
0 to 231.928 TPW, In FP, Sn FP ∆ 1
9
1
2
0 to 419.527 TPW, Sn FP, Zn FP ∆ 1
8
1
2
0 to 660.323 TPW, Sn FP, Zn FP, Al FP ∆
On the RTDs Management page, you can delete an existing RTD by pressing Deleteand re‐edit it by pressing Enter or
Edit.
When the custom RTD is added to the RTDs Library successfully, your calibrator is now ready to make measurements
using your custom RTD.