902B Abs Piezo
Operation manual
21
Transducer lock function
To ensure that no unauthorized personnel are able to change transducer setup and parameters, the
transducer lock function can prevent direct access to parameter changes. Transducers delivered with pre-
configured custom specified parameters (special part number) are per default locked and will reply with
“NAK180”, if the user tries to change locked parameters. The unlock procedure must be executed to change
these parameters.
Disable lock function command:
Command:
@253FD!UNLOCK;FF
Command reply:
@253ACK;FF
Enable lock function command:
Command:
@253FD!LOCK;FF
Command reply:
@253ACK;FF
Standard transducer (7 digits part number: 902B-xxxx)
Factory default:
Transducer unlocked
Special configuration transducer (11 digits part number: 902B-xxxx-xxxx)
Factory default:
Transducer locked
If the transducer is delivered with special configuration, the lock function will only be
temporarily disabled and will be enabled again after cycling power cycle or executing
the enable lock command.
The 902B transducer can be delivered with factory locked tamperproof settings for
safety interlock applications. This option is defined in the special settings. If
delivered with factory lock the transducer settings can only by changed by return of
gauge to MKS.
User Switch Command
The User Switch function can be disabled to prevent accidental execution of zero and atmospheric
adjustments.
Command:
@253SW!OFF;FF
Command values:
ON,OFF
Command reply:
@253ACK;FF
Query:
@253SW?;FF
Query reply:
@253ACKON;FF
Factory default:
ON
Transducer test
The transducer test command can be used to visually identify a transducer. If the test mode is enabled the
LED will flash with a 1 sec. cycle time.
Command:
@253TST!ON;FF
Command values:
ON,OFF
Command reply:
@253ACK;FF
Query:
@253TST?;FF
Query reply:
@253ACKON;FF
Factory default:
OFF
