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INM MTL 130-0202 Rev 4
4.3.2 Edit mode
To edit a value, start by pressing the
View
button to enter the screen choice level. Use the
arrow buttons to step through each screen and its options. At the chosen parameter, press
the Edit button at which point the following screen is displayed.
This is to warn that all outputs will be stopped at their current value if the user goes further.
Before continuing, the operator must be sure that no plant malfunction or safety problems
will occur due to the ‘freezing’ of the analyser outputs.
When Edit mode is entered, a flashing cursor will appear on the first digit that may be altered.
The keys increment or decrement the digit. Once a digit is correct the next digit is selected
by pressing the Edit key, and so on, until the final digit. To skip a digit, press the Edit key
twice. When the Edit key is pressed on the final digit the display will show “Storing Data”
momentarily and then return to view mode, displaying the new parameters and un-freezing
the outputs.
If no keys are pressed for any 30 second period while in Edit mode an automatic time-out
takes the instrument back into measurement mode and displays a screen to this effect. Any
changes made during Edit mode prior to this are ignored and lost.
NOTE
When setting alarms the maximum hysteresis that can be set is 20% of the span of the
particular channel. It is important not to set the hysteresis to a level greater than the alarm
point otherwise the alarm will never reset.
The following is a summary of the function of the keys when in View and Edit modes.
View mode (block cursor not displayed):-
return to the previous parameter or screen
advance to the next parameter or screen
View
exit View mode and return to Measurement mode
Edit
displays warning screen - press again for edit cursor. See below
Edit mode (block cursor displayed):-
increment the digit under the cursor
decrement the digit under the cursor
View
exit Edit mode - return to View mode
Edit
advance to the next digit - or store entry (if the last digit has been changed)
and return to View mode
