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2) C
(CAl)
AlibrAtion
Application mode
Start CAL:
The Calibration function is
activated by short-circuiting the
pin E – F for a minimum time of
1 second.
Stop CAL:
Release the E - F short-circuit.
NOTE:
The Calibration function is not allowed for "external Autozero" version.
3) t
otAl reset of the CAlibrAtion vAlues
Application mode
The Autozero fuction can be activated
in the following ways:
1) Magnet has to be maintained on
the Autozero position for a time of
20 to 25 seconds.
2) Short-circuiting the correct pins
(e.g. pins E-F for the 6 pin connec-
tor) for a time of 20 to 25 seconds,
for the external Autozero version.
NOTE:
During the total reset phase, the current output for the IE/IX transmitter series, can increase up to 7 mA.
4b - NE21 and NE43 compatibility specifications (for series IX - IE - I7 )
The IX - IE and I7 series are fully compatible with the NE21 Namur recommendation.
The same compatibility is valid for the NE43 Namur recommendation with the following sensor behaviour in case of
breakdown:
• Cut cable: breakdown information as the signal is ≤ 3,6 mA
• Device not connected: breakdown information as the signal is ≤ 3,6 mA
• Broken power-supply: breakdown information as the signal is ≤ 3,6 mA or in case of performance problems
•
Most common failures on primary sensors: the signal goes to 23 mA (e.g. due to overpressure)
NOTE: in all the remaining situations, the output signal is always included between 3,6 and 21 mA.
Recommendation: the error level set by the customer (e.g. maximum pressure value) has to be inside the
sensor nominal range.
5. AUTOCOMPENSATION EFFECT ON IMPACT SERIES
Impact series sensors work on a piezoresistive principle by a silicon chip. All the components need about an accurate
thermal compensation either of the zero signal or of the span signal.
This compensation eliminates the sensor drift effects and is realized by the temperature signal digital reading through
the silicon chip.
The components thermal inertia can generate signal over/under elongations (<15% FSO) during fast thermal gradients.
In steady state the signal is correctly compensated.
80175G_MAN_I3-IE-IN-IX_I7_11-2018_ENG
Limits
The whole Zero unbalancement in
comparison to the zero done by the
manufacturer, has to be ± 20%FS.
Limits
Result
During the Calibration phase the
signal will be unbalanced to the
80% FS.
The calibration effect is visible 2
seconds after short-circuiting E - F.
The Calibration function doesn't work
outside the defined limits.
Result
The Zero and Span of the transmitter
will be recalibrated to the factory
settings.
15
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