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3 Operation and visualisation
3.3 Different chart speeds (paper feed)
Normal chart
speed
Limit operation
(limit feed)
H
External
speed
Timed
operation
(feed time)
26
The printing recorder is equipped with several different chart speeds, so that
the measurements can always be optimally interpreted on the chart.
The chart paper is transported with the speed which is programmed in the pa-
rameter Operating level
If
the
value
goes
(Configuration level 1
over to the speed programmed in Configuration level 2
To avoid excessively frequent chart speed changes, a switching
differential (hysteresis) of 0.5% is applied to the switching level.
The switching differential is referred to the scaling and zoom.
Differential
Se = scaling end
Sa = scaling start
Ze = zoom end
Za = zoom start
A signal at a logic input (extra code) can be used to switch to a chart paper
speed which is programmed in Configuration level 3
This chart paper speed is valid for a programmable period of time, and is de-
fined by the parameter Configuration level 2
If it is set so that start time = end time, then the timed operation is inactive.
Different priorities apply for the various speeds.
v Section 3.5.6 "Switching the chart speed"
Chart speed.
above
or
below
Limit feed) then the paper transport will be switched
(Se - Sa) x (Ze - Za) x 0.01
=
----------------------------------------------------------- -
100
the
programmable
Feed limit.
External speed.
Feed time.
limits
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