Hioki IR3455, Instruction Manual

Page: 176 / 184

Appendix 4 Temperature Compensation Table
170
Table No.3 to 8
Object under test
Power cable (Classified in one of
the tables No.3 to 8 depending on
material and operating voltage.)
Selectable reference
temperature range
Selectable range of each table is
as follows. Set to 20°C by default.
Table No.3: -5 to 40°C
Table No.4: -5 to 36°C
Table No.5: 1 to 40°C
Table No.6: 0 to 40°C
Table No.7: 0 to 40°C
Table No.8: 0 to 40°C
Convertible range of
actual temperature
used for measurement The selectable ranges are as
shown above.
Compensation
formula
• Converted to a resistance value
at the reference temperature
using the formula below and
result displayed.
• Use the coefficients shown in the
"Temperature Conversion Coeffi-
cient for Power Cables" (page
171).
Atref : Coefficient at the reference
temperature of tref°C
At : Coefficient at the actual
measurement temperature
of t°C
Rtref : Resistance after compen-
sation for reference tem-
perature of tref°C
Rt : Resistance measured at
the temperature of t°C
tref : Reference temperature [°C]
t : Actual measurement tem-
perature [°C] (The decimals
are rounded in compensa-
tion mode.)
R
tref
At Atref

Rt

=