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5.1 Instrument description
Block structure
5 Identifying the instrument version
The printing recorder is equipped with 3 or (optionally) 6 signal inputs, which
are electrically isolated from one another. The evaluation of the measurement
traces of the printing recorder can be assisted by printed texts.
The programming of the instrument is possible either by using the 8 keys on
the front of the instrument or through a PC setup program. The configuration
data are permanently stored in an EEPROM.
A 24-character LED dot-matrix display is available for checking and configur-
ing the parameters and displaying the latest measurements on the instrument.
Thermocouples, resistance thermometers, resistance transmitters, potentio-
meters, voltages or currents (standard signals) are all possible as input signals.
The appropriate linearisations are carried out automatically, and can also be
adjusted to customer-specific linearisation with the aid of the setup program.
Further outstanding features of this instrument, which are already included in
the basic model, are four open-collector outputs for signalling infringements of
limits and errors, as well as 8 event traces.
Eight logic inputs are available for control functions. The ER8 external relay
module, for mounting on standard C-rails, expands the printer with 8 switch-
able outputs. A 2-wire transmitter can be fed from an electrically isolated sup-
ply voltage.
The maths/logic module can be used in most cases to achieve an individual
adaptation, even for quite complex tasks.
In the event of a mains supply failure, the real-time clock is buffered by a lithi-
um battery or a storage capacitor.
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