gefran ILI Series Original Operating Instructions page 26

7.11. Enable CAL parameter
The Enable CAL parameter (see par 7.4 – Extended index – index 0x0101) allows the user to bring the output value, both analog
(where available) and IO-Link, to the 80% of Full Scale; this option is used during calibration procedure as described at par. 5.2.
Action on this parameter must be done by skilled and trained personnel, can be acted only by Specialist and Maintenance users and
should be executed only during installation procedure or maintenance, according to following procedure:
• Bring the system to work temperature with the transducer installed and connected to the measurement instrument without any
pressure applied
• Execute Autozero command if needed
• Set to "TRUE" the Enable CAL parameter
• The transducer output will go to 80% FS, the led will turn to fixed yellow
• Verify the reading on instrument / controller of transducer output, calibrate it if needed
• Set to "FALSE" the Enable CAL parameter
• The transducer output will go back to 0% FS, the led will turn to blinking green
• Verify the reading on instrument / controller of transducer output
Application of command has immediate effect on output.
7.12. Analog Out Type parameter
As already described in 7.7 the IL transducer has an optional analog output (only for SIL 2 / PL d analog output version).
The analog outputs available are:
• 0,5...10,5 Vdc (voltage output)
• 4...20 mA (current output)
The user has to select one of this option in ordering code; this will be the default configuration.
The Analog Out Type parameter (see par 7.4 – Extended index – 0x011F), allows the user to switch from Voltage to Current output
and viceversa, under following constraints and procedure:
• It can be acted only by Specialist and Maintenance users
• It is limited to only the two values allowed: 0x01 (Current), 0x02 (Voltage); other values will be rejected
• A power cycle is needed in order to make the new configuration active
Note: reading a current output transducer with a voltage meter or reading a voltage output transducer with a current meter will bring
the output to an out of range and for this reason it must be considered as a fault condition by the controller.
7.13. 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.
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