Amphenol Kaye CTR-40, User Manual, Page: 75 / 84

R
10 Calibration Procedure
R0 = 100.000
ALPHA = 0.0038500
t
L
= 30.00°C
measured t = 29.843°C
t
H
= 80.00°C
measured t = 79.914°C
Compute errors,
err
L
= 29.843 - 30.00°C = -0.157°C
err
H
= 79.914 - 80.00°C = -0.086°C
Compute R0
′
,
ϒ
(
−
0.086)
×
30.0
−
(
−
0.157)
×
80.0
0
′ = ′
⁄
0.00385
+
1
∞
100.000
=
100.077
≤
80.0
−
30.0
ƒ
Compute ALPHA
′
,
ϒ ⁄
(1
+
0.00385
×
80.0 )(
−
0.157)
−
(1
+
0.00385
×
30.0 )(
−
0.086 )
ALPHA
′ = ′ +
1
∞
0.00385
=
0.0038416
≤
80.0
−
30.0
ƒ
Figure 8
Calibration Example
stored in the future. The new values R0
′
and ALPHA
′
are computed by entering
the old values for R0 and ALPHA, the calibration temperature set-points t
L
and
t
H
, and the temperature errors err
L
and err
H
into the following equations,
R
ϒ err
H
t
L
−
err
L
t
H
ALPHA
⁄
R
0
′ = ′
≤
t
H
−
t
L
+
1
∞
0
ƒ
ϒ (1 ) (1 ) ⁄
ALPHA
′ = ′
+
ALPHA t
H
err
L
− +
ALPHA t
L
err
H
+
1
∞
ALPHA
≤
t
H
−
t
L
ƒ
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