Halytech
hydroSpider2 User’s Manual v1.23
Page 37
5.5.5.5
Sampling Period
Applies to
: All Analogue input types, Intelligent Inputs, Switch State, System Monitors
The Sampling Period is the period at which readings are taken on the channel (called sampling). If
this is set to less than the logging period, the logged value will be calculated from the readings
sampled during the logging period, depending on the Filter Type:
5.5.5.6
Filter Type
Applies to
: All Analogue input types, Intelligent Inputs, Switch State, System Monitors
When a channel is configured to sample more often than it logs, the Filter Type selects the type of
calculation which will be performed on the samples:
Average
: the average of all the samples taken within the logging period will be logged. This
is useful to increase the reading’s accuracy or monitor fast-changing data without logging all
of these fast changes.
Integrate
: the samples are totalled and multiplied by the duration of the sampling period in
seconds. This can be used, for example, to convert a flow rate (kl/s) into a volume (kl), or
power readings (kW) into accumulated energy (kJ).
Note
that filtering will only occur when the sampling period is less than the logging period. If both
periods are the same, then the hydroSpider2 will simply log every sampled value.
5.5.5.7
Divide Samples by 1000
Applies to
: Channels with Integrate filter type
This option divides each sample reading by 1000 before it is integrated. This may be necessary to
ensure that the total (integrated) value does not exceed the maximum value of 999,999.99 that can
be logged by the hydroSpider2.
For example, if a flow rate measured in kl/s is being integrated to calculate volume, selecting this
option means that the resulting volume will be measured in Ml instead of kl.
5.5.5.8
Log Min/Max
Applies to
: Analogue 4-20mA, Analogue Voltage, Intelligent Inputs, System Monitors
If a channel is configured to sample more often than it logs, the Min / Max logging feature becomes
available. The Min / Max logging option will, in addition to logging the average value, log the
minimum and maximum sampled values during each logging period. This is useful if, for example,
you wish to monitor the minimum, average, and maximum water level in a pipe over the course of
the logging period without having to increase the logging rate.
For example
: consider a hydroSpider2 which has its logging period is set to 3 minutes, and also has
an analogue channel configured with a 1 minute sampling period with filter type set to average and
min/max logging. If the following data is sampled:
Time
Sampled Value
12:30:00
114.15
12:31:00
115.15
12:32:00
112.15
Then at the logging period the average of 113.816 will be logged. Additionally, the minimum 112.15
and the maximum 115.15 will also be logged.
