4900002277 J22 TDLAS Gas Analyzer
106 SpectraSensors, Inc.
Protecting Settings
from Unauthorized
Access
The following write protection options exist in order to protect the J22 TDLAS Gas
Analyzer software configuration from unintentional modification:
• Protect access to parameters via access code
• Protect access to local operation via key locking → 39
• Protect access to measuring device via write protection switch → 108
Write protection via access code
The effects of the user-specific access code are as follows:
• Via local operation, the parameters for the measuring device configuration
are writeprotected and their values can no longer be changed.
Defining the access code via local display
1. Navigate to the Define access code parameter .
2. Define a max. 16-digit character string comprising numbers, letters and spe-
cial characters as the access code.
3. Enter the access code again in the Confirm access code parameter (→ 104)
to confirm the code.
The -symbol appears in front of all write-protected parameters.
The device automatically locks the write-protected parameters again if a
key is not pressed for 10 minutes in the navigation and editing view. The
device locks the write-protected parameters automatically after 60 s if the
user skips back to the operational display mode from the navigation and
editing view.
• If parameter write protection is activated via an access code, it can also only
be deactivated via this access code → 39.
• The user role with which the user is currently logged on via the local display
is indicated by the → 39 Access status parameter. Navigation path: Opera-
tion → Access status.
Parameters that can always be modified via the local display
Certain parameters that do not affect the measurement are excepted from
parameter write protection via the local display. Despite the user-specific access
code, they can always be modified, even if the other parameters are locked.
Diagnostic even
category
— Select a diagnostic
event category.
•Sensor
• Electronics
• Configuration
•Process
Process
Diagnostic event
simulation
— Select a diagnostic
event to simulate this
event.
•Off
• Diagnostic
event picklist
(depends on
the category
selected)
Off
Parameter Prerequisite Description User Entry Factory Setting
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