Hydro Logger H40
User manual
26
electronics for ecology
FIEDLER
SETTING THE NUMBER OF MEASUREMENTS
The number of samples from which the final value for archiving will be calculated using
the weighted average method can be set by combining the
Basic Archiving Interval
and
the
Archiving Interval
for each recording channel.
The H40 station performs one measurement on all set channels at the interval specified
by the
Basic Archiving Interval
parameter
.
If this parameter is the same as the Archiving
Interval of the measuring channel, this one measured value is stored in memory at the
end of the archiving interval. However, if the
Basic Archiving Interval
is set to e.g. 10 min
and the
Archiving Interval of
the measuring channel to 30 min, the average value calcu-
lated from 3 measured samples is stored in the memory of the instrument every 30th
minute
.
The parameter settings can be seen from the following examples of settings:
Example A: Storing the current value measured at the end of every 30th minute
Basic archiving interval = 30 min
Archiving interval = 30 min
Example B: Store the average value of 6 measurements every 60th minute.
Basic archiving interval = 10 min
Archiving interval = 60 min
Note: Reducing the "Basic Archiving Interval" parameter below 10 minutes results in a
faster discharge of the power supply battery, so set this parameter value judiciously. This
note becomes less important when using an external power supply.
OVERLIMIT ARCHIVING INTERVAL
The figure shows the triggering condi-
tions for the over-limit archiving interval.
Setting it allows you to record in detail the
progress of the incident on the measure-
ment channel.
An overlimit interval (2 minutes in the ex-
ample in the figure) can be triggered not
only by activating an alarm on the chan-
nel itself (in the figure), but also by an
alarm on another set channel.
Appropriate setting of the archiving pa-
rameters allows, for example, to suppress the recording of uninteresting low values of
the measured variable and to store only values that exceed the set limit.
Example 1: When measuring temperature, only store values greater than 30 ºC.
Basic archiving interval = 10 minutes (in the basic parameters window)
Archiving interval = 0 (in the channel window)
Limit alarm set (Lower limit = 0, Upper limit = 28, Hysteresis = 2)
Over limit trigger condition: limit alarm
Archiving interval overlimit value = 2 minutes
Example 2: When measuring the level, record detailed values greater than 160 mm
.
Basic archiving interval = 1 min (in the basic parameters window)
Archiving interval = 5 min (in the channel window)
Limit alarm set (Lower limit = 0, Upper limit = 155, Hysteresis = 5)
Over limit trigger condition: limit alarm
Archiving interval overlimit value = 1 min
A v e r a g e d v a l u e
s t o r a g e
S u p p r e s s i n g t h e
r e c o r d i n g o f
u n i m p o r t a n t d a t a
