7102 Micro-Bath User’s Guide
Calibration Procedure
50
Compute DELTA
12.2.1
A T T
= −
3
2
B T T
= −
2
1
C
T
T
T
T
=
−
−
−
3
3
2
2
100
1
100
100
1
100
D
T
T
T
T
=
−
−
−
2
2
1
1
100
1
100
100
1
100
E R T
=
−
3
2
F R T
=
−
2
1
delta AF BE
DE CF
=
=
−
T
1-3
– Measured temperature using thermometer.
R
1-3
– Value of R from display of 7102 (Press SET and DOWN at the same time.)
where
T
1
and
R
1
are the measured temperature and resistance at 50.0 °C
T
2
and
R
2
are the measured temperature and resistance at 90.0 °C
T
3
and
R
3
are the measured temperature and resistance at 150.0 °C
Compute R0 & ALPHA
12.2.2
a T delta
T
T
1
1
1
1
100
1
100
= +
−
a
T delta
T
T
3
3
3
3
100
1
100
= +
−
rzero
R a
R a
a a
=
=
−
3 1
1 3
1
3
alpha
R R
R a
R a
=
−
=
1
3
3 1
1 3
Where:
delta
is the new value of DELTA computed above
Program the new values for DELTA (delta), R0 (rzero), and ALPHA (alpha) into the
Micro-Bath with the following steps.
Press “SET” and “EXIT” keys at the same time and then press “UP” until
1.
