4.2 Load Compensation
47
4
Load compensation allows for the calculation of the load compensation rate
by measuring a standard sample with known measurement values and com-
pensating the measurement values.
With this function, when using multiple Model 3504-40, 3504-50, 3504-60
units, the measurement errors of individual Model 3504-40, 3504-50, 3504-60
units can be reduced and a single measurement value produced. Alternately,
the measurement values of the Model 3504-40, 3504-50, 3504-60 can be
matched to those of a reference device.
The load compensation rate
(load compensation value) is determined by
first calculating the impedance Z and phase angle
from the reference val-
ues of the measurement conditions, C, and D and the actual measurement
values and then using the following formula for the calculation.
Z compensation rate = (Z reference value)/ (Z actual value)
compensation rate = (
reference value)
(
actual value)
For the actual values of Z and
, compensation is performed using the above
load compensation rate and then C and D are calculated from Z and
after
compensation.
4.2 Load Compensation
• The conditions that are currently set (level, range, self calibration) are used
as the measurement conditions for load compensation.
However, the load circuit compensation values will be separated according
to the measurement frequencies.
Changing the measurement conditions while load compensation in enabled
results in load compensation being disabled. (When this happens, the OFF
LED of LOAD flashes.)
If, however, the measurement conditions are returned to what they were dur-
ing load compensation, then load compensation is resumed.
(The ON LED of LOAD lights up.)
For example, in the measurement frequencies shown in “Yes” in the table
below, the load compensation function is still enabled even when the
measurement value is changed to 120 Hz
1 kHz after the load
compensation value has been acquired.
When the level, range, or self calibration is changed, the load circuit com-
pensation function becomes disabled.
• The enabling/ disabling of load circuit compensation will not change even if
the self calibration setting is changed between AUTO and MANU. The load
circuit compensation will disable when you change OFF
MANU, AUTO.
• When open circuit compensation and short circuit compensation are
enabled, load compensation performs compensation for Z and
after open
circuit compensation and short circuit compensation are finished.
During the reading of open circuit compensation and short circuit compen-
sation, setting, enabling/disabling of the circuit compensation value, and
setting of all circuit compensation acquisition points, when the level is the
same as the measurement signal level for load circuit compensation acqui-
sition (setting) and the open circuit compensation and short circuit compen-
sation value is changed, the load circuit compensation value will be adjusted
by the most current open/short circuit compensation value and the load cir-
cuit compensation coefficient will be re-calculated.
Measurement frequency
120 Hz
1 kHz
load compensation
Yes
Yes
Summary of Contents for 3504-40 C HiTester
Page 2: ......
Page 22: ...1 4 Names and Functions of Parts 16 ...
Page 28: ...2 5 Turning the Power On and Off 22 ...
Page 40: ...3 3 Setting the Measurement Conditions 34 OF UF Evaluation Flow Chart ...
Page 66: ...4 4 Self Calibration 60 ...
Page 96: ...5 2 BIN Measurement Function Model 3504 50 3504 60 only 90 ...
Page 136: ...7 4 About Measurement Times 130 ...
Page 286: ...Appendix 7 Initial Settings Table A14 ...
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