8.
Options
8.1 Analog-outputs
8.1.1 Options V218 - analog recorder output 4-20mA
When option V218 is installed,
2240 PROcheck
is equipped with a
galvanic separated current output.
Resolution of the output current is dependent on sensor type installed
and on the preset spread. During warm-up period and zero adjustment
the recorder output is set to 4mA. This corresponds to a concentration
of 0 g/m
3
or 0 ppm. During actual measuring the recorder output is set
- prior to every pumping cycle - to the current which corresponds to
the actually measured concentration. If an underflow of the measuring
range occurs, the output is set to that current value which corresponds
to the lower limit of the measuring range.
The nominal resistance on the output should be 100 Ohm.
Pin 1: GND
Pin 3: Signal
Fig. 11
4-pin Binder-Connector, pin assignment analog out
Depending on the total measuring range the following values arise as
a result of spreading:
Spreading 1:
The entire range is scaled on 4mA to 20mA.
Spreading 10:
A tenth of the entire range is scaled on 4mA to 20mA.
Spreading 100:
A hundredth of the entire range is scaled on 4mA to 20mA.
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