Compute Beta; Accuracy And Repeatability - Fluke 9133 User Manual

9.2.3

Compute BETA

=
x
=
y
beta
Where T
and alpha, rzero, and delta are the new values of ALPHA, R0, and DELTA
calculated above.
Program the new values for R0 (rzero), ALPHA (alpha), DELTA (delta), and
BETA (beta) into the instrument with the following steps.
1.
2.
3.
9.2.4

Accuracy and Repeatability

Check the accuracy of the instrument at various points over the calibrated
range. If the instrument does not pass specification at all set-points, repeat
the Calibration Procedure.
⎡ ⎤
T
−
1
1
⎣ ⎢ ⎦ ⎥
100
⎡ ⎤
T
1
⎣ ⎢ ⎦ ⎥
100
1
= +
( )
( )( ) ( )
3
alpha x y
and R are the measured temperature and resistance at –25.00°C
1 1
Reference Section 7.13 to display R0.
Press the "SET" button then use the "UP" or "DOWN" buttons until
the correct numerical setting is displayed. Press the "SET" button to
accept the new value.
Repeat step 2 for ALPHA, DELTA, and BETA.
T delta
− −
1
( )
(
3 2
y
x y alpha x y
Calibration Procedure
R
1
r
0
( )
)( )
3
9
37