3 | Commissioning
FISCHER Mess- und Regltechnik GmbH
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BA_EN_MS13
NOTICE
Response time
At maximum damping it can take over 2 minutes until the pressure jump from
the nominal pressure 100% to 0% is also shown as zero in the display.
In many cases, unsteady readings are not a problem during normal operating
mode, but this is not true for the idle state, i.e. if a measured value of zero is ex-
pected. The parameter
Zero-pt. wind.
is designed to solve this. Its value
defines a range around zero at which the measured value is set to zero (see
fig.).
The display only stops showing zero when the pressure leaves the set window.
When twice the window value is reached, the measuring pressure and the dis-
play correspond again. This avoids jumps in the display.
Differential pressure
Display value
-x
-2x
x
2x
Zero-point window
Illustration 16:
Zero-point window
It makes sense to set the Offset (zero-point displacement) if, without differential
pressure (remove measuring line), the display shows a value that is not zero.
Before the offset correction, the zero-point window must be set to zero.
Select the
Offset corr.
parameter and correct the reading using the buttons
þ
or
ÿ
until zero is shown in the display.
When setting the offset, the current measured value is displayed. The zero-
point window is not active during the offset setting.
3.3.3 Menu Level Measuring
Parameter name
Description
Value range
MB start
Measuring range start
Basic measuring
range
MB end
Measuring range end
Basic measuring
range
Unit
Measuring range unit
bar, mbar, Pa, kPa,
MPa, psi, InWc,
mmWs, mmHg
Limit
Measuring range limit
yes, no
The transmitter output signal primarily depends on the sensed pressure. How-
ever, you have the option of adjusting the output signal to a large extent to suit
your requirements.
