48
8. Electricity Squirrels (1010, 1020)
Electricity Squirrels have inputs for AC transducers, like Rogowski coils,
current and voltage transducers. An extra function in the Squirrel allows
easy reviewing of the maximum logged values stored on each channel.
Additionally, the last two channels out of every eight can be used for
temperature probes.
8.1 Logger functions
8.1.1 Intervals
Due to the long settling times when measuring AC, the Squirrel
’s
minimum log or scan interval is increased to 5 seconds when more than
one analogue channel is selected. Selecting digital channels does not
affect this minimum interval.
8.1.2 Maximum
While logging, the Squirrel monitors each selected channel for peak
values. This function allows the user to review the maximum logged value
on each channel.
M A X I M U M c h 1
2 4 8 . 8 V
Along with the maximum value of the channel, the time at which it
occurred is also stored. If the same peak value occurs more than once,
then the time stored is that of the most recent peak. To view the time at
which the maximum occurred, press the
set
button:
M A X I M U M c h 1
2 5 / 0 3 / 9 6 1 1 : 5 4
The maximum on the next channel can be viewed by pressing the
select
button.
8.2 Selecting ranges
Ensure that the range selected is correct for the type of transducer
connected to the input - i.e. the 0 to 1000A CT range must not be used for
a Rogowski coil and vice-versa. Note that AC ranges that start at 0 only
achieve 0.1% accuracy at above 1.2% of scale.