West Control Solutions DataVU 5 - Manual (Page 20)

2 Device description
20
2.5.4 Response at end of summer time
2.6 Math/logic module
The math and logic module is available as an extra code. Like the counter/
integrator/operating time counters, the math and logic module is implemented
as channels that are not available as hardware but are calculated by the
instrument software.
The math and logic module consists of 2 parts:
- the math module for calculating analog values and
- the logic module for calculating Boolean values (0 or 1).
Math module With the help of the math module, measurement inputs can be used for the
calculation of “virtual” math channels.
A total of 6 channels can be recorded (stored) in the instrument. In the
configuration, you will find an option under Configuration
 Recording 
Analog channels  Analog channel 1 — 6  Input signal for selecting which
of the analog inputs or math channels should be stored.
If more than 6 channels are to be active in the instrument (e.g. 4 analog inputs
and 3 active math channels), then you can also use the visualization in the
presentation mode “Large digital display (large measurements)” to see the
measurements that are not stored.
v Chapter 3.2.4 “Large digital display (large measurements)”
A
If a period of less than one hour has been set for counters/
integrators, and the change from summer time to winter time falls
precisely within this period, then the PC evaluation software
(PCA3000) will forcibly set the end time to be the same as the start
time. This prevents a negative period arising, and ensures that
further processing is error-free.