DeltaOHM HD31, Operating Manual

Page: 42 / 154

HD31
- 42 -
V1.6
4.7.1 I
NTEGRATION
Besides the instant measurement, the instrument calculates and displays the time integral of
the acquired measurements (except for the LP 471 LUM2 probe):
where u(t) is the instant value of the input variable at time t. The sampling interval is fixed
and equal to 1 second.
The integral calculation is started manually. The operation can be stopped manually or auto-
matically when the user-settable threshold values are reached. The maximum integration time
is 100 hours.
Integral measurements are featured by the indication
INTEGRAL over the measurement unit.
If INTEGRAL-type measurements are not specifically selected for integral calculation, this is
enabled for all the available integral measurements. Integral calculation can be started only for
some INTEGRAL-type measurements, by specifically selecting them.
Selecting an INTEGRAL-type measurement for integral calculation:
1. Select the integral calculation to be enabled using
S
and
T
. Integral measurements are
featured by the indication INTEGRAL over the measurement unit.
2. Press SELECT to display the ITG
command in the command bar,
then select the command by press-
ing
F1 .
3. Select the SEL command by pressing F3 .
4. The indication INTEGRAL over the measurement unit is replaced
by the integration countdown, to indicate that the measurement
line is selected for calculating the integral.
To deselect the measurement line for calculating the integral, select again the SEL command ( F3
key): the integration countdown is replaced by the indication INTEGRAL.
Similarly select all the INTEGRAL-type measurement of which you want the integral calculation to
be performed.
Integration time