HD2102 - 17 - V2.3
Q/TIME INTEGRATION
In addition to instantaneous measurement, the instrument calculates the following summation:
(1) Q(t) = u(t) t,
Σ
⋅Δ Δ
t = 1sec
0
t
where u(t) is the instantaneous value of the input variable compared to time t. The sampling interval
is fixed at 1 second.
As soon as either the Q(t) value or the integration time t reach the set limit, the integration is
stopped.
Maximum integration time: 100 hours, 00 minutes, 00 seconds
Integration interval: 1 second
How to set the limits
To set the integration limit, enter the "INTG LIMT ###S" menu item. Use the arrows to set the
desired value. Confirm by pressing ENTER.
To set the final integration time, enter the TIME LIMT HOUR, TIME LIMT MIN and TIME
LIMT SEC menu items. Use the arrows to set the desired value in hours, minutes and seconds.
Confirm each item using ENTER.
To cancel the limit, set its value to 0.
Combined probe LP 471 P-A has two integration limits, one for illuminance and one for irradiance.
The integral calculation of irradiance/illuminance ratio is not provided.
LP 471 A-UVeff probe has three integration limits, one for each band.
How to perform an integration measurement
After setting the limits, as illustrated above, exit the menu and return to normal measurement.
Simultaneously press FUNC/ENTER and UNIT-Q/T.
To start and stop the integral calculation press Start/Stop Q/T.
To cancel the previous integration values and reset it, simultaneously press FUNC/ENTER and
MENU - CLR Q/T: if an integration is started without pressing the CLR Q/T key, the
calculation will continue from the previous values.
The integral calculation can be suspended at any moment pressing Start/Stop Q/T: in this status, to
resume the integration, press the key again.
If one or more limits have been enabled in the menu, on reaching of the first, the calculation stops.
Pressing FUNC/ENTER alternates the display of Q(t) and integration time.
Because the integration process proceeds according to discrete steps, the Q(t) value according to
which the integration is stopped could be slightly different than the set limit, but will be equal to the
first integration value that exceeds the limit.
Note: for the LP471 LUM 2 luminance probe, the integral calculation is not provided.
To Next Page
Loading...
Need help?
General
