9 Adjustment options
38
9.5 Detailed explanations
Peak-reading
pointer
Minimum and maximum pressures are saved. Both values can be individually
displayed and deleted.
Dimensional
unit
The pressure can be indicated directly in bar or in another pressure unit.
Output current,
measurement
start and end
The output current (in mA) that is available at the start (or end) of the measure-
ment can be set within the range +3.85 to +21.5mA. At the same time, the
pressure applied is saved as measurement start or end.
Damping To dampen an unsteady display caused by rapidly changing pressures, the
time constant for the display, T
63
, can be adjusted from 0.0 to 100.0sec.
Measurement
start,
blind setting
The measurement start can be set in % of the nominal pressure range. The
nominal measurement range is given on the nameplate.
➩
"Nameplate", page 8 .
Example:
The pressure transmitter has a nominal range of 0 to 25bar, but the output sig-
nal needs to be proportional in the range 5 to 20bar.
The necessary setting for the measurement start is derived as follows:
Nominal range: 0—25bar
Meas. start required: 5bar, corresponding to 20% of the nominal range
Setting: 20%
Measurement
span,
blind setting
The measurement span can be set in % of the nominal measurement range.
Example 1:
The pressure transmitter has a nominal measurement range from 0 to 25bar,
but the output signal needs to be proportional in the range 5 to 20bar.
The necessary setting for the measurement span is derived as follows:
Nominal range: 0—25bar
Range required: 5—20bar => required span: 15bar
Span required: 15bar, corresponding to 60% of the nominal range
Setting: 60%
If the damping is set to 0 .0sec, minimum and maximum pressures
will not be saved.
➩
"Detailed explanations", page 38.
If the damping is 0.0sec, or after a reset of the display,
“- - - - -” will be shown.
At a damping of 0.0sec, the pressure transmitter will not save the
minimum and maximum pressures, i.e. the peak-reading pointer
function is switched off.
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