DeltaOHM HD31, Руководство по эксплуатации

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HD31
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V1.6
5.5 RECORD
FUNCTION BEHAVIOR AT LOGGING STARTUP
Minimum, average and maximum values calculated with the RECORD function, which appear
on the display, can be recorded onto the SD card thanks to the LOGGING function (see chapter
7 at page 53) exactly like the current values of the quantities. The data logger allows various
behaviors of the RECORD function to be set at logging startup:
• Automatic reinizialization and activation, if in stop condition, of the function when log-
ging is started.
• Automatic activation, if in stop condition, without reinitialization (the function contin-
ues from the reached value) of the function when logging is started.
• The function is neither automatically reinitialized nor automatically enabled, if in stop
condition, when logging is started (the row will turn orange to highlight the stop status).
See paragraph 7.12 at page 66 to set the RECORD function behavior at logging startup.
The minimum, average or maximum values are stored (if selected for logging) only if the in-
strument is set to not turn off between two subsequent samplings, because calculating the
minimum, average or maximum values each second requires the instrument to stay always on.
If the instrument is set to turn off between two subsequent acquisitions, only the instant value
of the signal supplied by the probe will be stored.
5.6 RECORD
FUNCTION AND RELATIVE MEASUREMENT
If the RECORD function is used with relative measurements, pay attention that the meaning of
the RECORD function is different depending on whether the function is enabled before or after
the REL function.
If the REL function is enabled first and secondly the RECORD function, the values acquired by
the RECORD function are the relative values of the quantity, and minimum, average or maxi-
mum values viewed on the display refer to the relative measurement. If the REL function is
disabled, the RECORD function is automatically disabled too, because new relative quantity
values are no more available.
If the RECORD function is enabled first (starting therefore to acquire the quantity actual val-
ues) and secondly the REL function, the RECORD function is not reinitialized, but continues to
acquire the quantity actual values (and not the relative measurement displayed). The value
appearing on the display is the difference between current value (if the “rdc” indication ap-
pears next to the number of acquisitions of the RECORD function) or the value calculated by
the RECORD function (if the MIN, AVG or MAX indication appears next to the number of acqui-
sitions of the RECORD function) and the reference value (actual value of the quantity at the
moment in which the REL function was enabled). If the REL function is successively disabled,
the RECORD function remains active and continues to acquire the quantity actual values.
The activation order of the functions appears on the display: the firstly enabled function is in-
dicated in the upper part at the center of the measurement line, the secondly enabled function
is indicated in the upper part at the right of the measurement line.
Fig. 5.6.1: activation order of RECORD and REL functions
RECORD function
enabled before
REL function
RECORD function
enabled after
REL function