Model 4200A-SCS Parameter Analyzer Reference Manual
Section 13: LPT library function reference
4200A-901-01 Rev. C / February 2017
13-73
intgX
This command performs voltage or current measurements averaged over a user-defined period (usually, one AC
line cycle).
Usage
int intgi(int
instr_id
, double *
result
);
int intgv(int
instr_id
, double *
result
);
instr_id
The instrument identification code of the measuring instrument, such as SMU1
result
The variable assigned to the result of the measurement
Details
The averaging is done in hardware by integration of the analog measurement signal over a specified
period of time. The integration is automatically corrected for 50 Hz or 60 Hz power mains.
For a measurement conversion, the signal is sampled for a specific period of time. This sampling time
for measurement is called the integration time. For the
intg
X
command, the default integration time
is set to 1 PLC. For 60 Hz line power, 1 PLC = 16.67 ms (1 PLC/60 Hz). For 50 Hz line power, 1 PLC
= 20 ms (1 PLC/50 Hz).
The default integration time is one AC line cycle (1 PLC). This default time can be overridden with the
KI_INTGPLC
option of
setmode
. The integration time can be set from 0.01 PLC to 10.0 PLC. The
devint
command resets the integration time to the one AC line cycle default value.
The only difference between
meas
X
and
intg
X
is the integration time. For
meas
X
, the integration
time is fixed at 0.01 PLC. For
intg
X
, the default integration time is 1 PLC but can set to any PLC
value between 0.01 and 10.0 by using the
setmode
command.
range
X
directly affects the operation of
intg
X
. The use of
range
X
prevents the instrument
addressed from automatically changing ranges. This can result in an overrange condition that would
occur when measuring 10.0 V on a 4.0 V range. An overrange condition returns the value 1.0E+22 as
the measurement result.
If used,
range
X
must be in the test sequence before the associated
intg
X
command.
In general, measurement commands that return multiple results are more efficient than sending
multiple measurement commands.
Compliance limits
– A compliance limit setting goes into effect when the SMU is on a measure
range that can accommodate the limit value. For manual ranging, the
range
X
command is used to
select the range. For autoranging,
intgi
or
intgv
triggers a needed range change before the
(on page 3-3) for details.
