Chroma 16502 - Operation Example

Milliohm Meter 16502 User’s Manual
8-10
however [] and [] are for fine adjustment. The panel of 16502 shows R
TC
is
a resistance value after converted under this selection.
8.3.3 Operation Example
In the above section example, the ambient temp. is 30°C, meanwhile the resistance value of
measured copper wire is 100Ω. How many the resistance value is when you want to convert
20°C? The user needs to input the value (20°C) which want to convert and temp. coefficient.
When the conduction coefficient closes to 1, thus temp. coefficient of copper is 3930 ppm.
The condition of calculation is 100Ω copper wire under 30°C ambient temp.. The conversion
step of resistance value under 20°C ambient temp., please follows 3930 ppm temp.
coefficient.
Rt0: Unknown resistance value
Rt: 100Ω
t0: 3930 ppm
t(°C): 30°C
t0 (°C): 20°C
Rt0 = Rt/{1+ t0 * (t-t0)} = 100 / {1 + (3930 e-6) *(30 - 20)} =96.21Ω
Its operation steps as follows.
(1) Parameter setting t0 (°C): 20°C
αt0: 3930 ppm
Press [System Setup] on panel then [F3] key (i.e. SYSTEM CONFIG) as well as press
[] and [] to move the cursor to the next selection. Set CORREC. TEMP to
+20.0 °C and THERM. COEFF to 3930 PPM.
< S Y S T E M C O N
F
I G >
5 0
H
z
L I
N E F R E . : 6 0
H
z
G P I B . A D D
R
E S S :
1 7
6 0
H
z
B A U D R A T E :
1 9 2 0 0
C O R R
E
C . T E
M
P
:
+ 2 0 . 0
℃
T
H
E R
M
. C O
E
F F
.
:
3 9 3 0
p p
m
F2
F3
F4
F1
(2) Press [Meas Display] on panel then [F4] key to change to the third page as well as press
[F3] to select TEMP.: AUTO, thus the screen will show the converted resistance value.
(In the above example, ambient temperature is 30.0°C and the resistance value which
measured by 16502 output terminal is 100Ω. Therefore, the converted result RTC:
96.21Ω.)
<
M
E A S . D I S P L A Y >
*
C O
M
P A R E : O F F
T C B I N N I N G : O F F
T E
M
P . : A U T O
T
E M P . : + 3
0
. 0 ° C
N E X T P A G E 3
／
4
2
1
Ω
R
:
9
F4
F1
6
F2
F3
.