VEGA MINITRAC 31 4 … 20 mA_HART - four-wire With SIL qualification - Manual (Page 36)

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7 Set up with the display and adjustment module
MINITRAC 31 • 4 … 20 mA/HART - four-wire
43389-EN-131119
You can choose "no" reference value. In this case, the relay output
operates as fail safe relay.
•
None - Relay operates as fail safe relay
•
Electronics temperature
•
Process value
"No" reference value means that the relay output operates as fail safe
relay.
Push the [->] button, to reach the relay settings.
Example for the adjustment of the process value
First of all select the requested mode (overfill or dry run protection).
Caution:
Independent of the selected reference value, the relay will deenergize
in case of failure.
With this menu item you safeguard the sensor parameters against
unauthorized or unintentional modifications.
To avoid possible errors during parameterization in a non-safe user
environment, a verification procedure is used that makes it possible
to detect parameterization errors reliably. For this, safety-relevant
parameters must be verified before they are stored in the device. In
normal operating condition, the instrument is also locked against
parameter changes through unauthorized access.
For this reason, the instrument is shipped in locked conditon. The PIN
in the delivery status is "0000".
After a change, all safety-relevant parameters must be verified. For
this purpose, a character string comparison must be carried out. This
is used to check the character respresentation and the communica-
tion channels.
Confirm if the two character strings are identical. The verification texts
are provided in German and with all other menu languages in English.
Lock setup - adjustment