Elcometer 355 Operating Instructions Manual page 25

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Press [SETUP], [ENTER] or [Esc] to return to the 'LAn'
display.
7.9 REASONABLE LIMITS FUNCTION
Reasonable limits can be set between 0% and 99% of the range between the high and low limits, and apply
above the high limit and below the low limit.
For example, if the low limit is 100 µm and the high limit is 150 µm, the range is (150 - 100) = 50 µm.
Therefore if the reasonable limits are 20%, then the value applied is (50 x 0.2) = 10 µm.
Therefore, readings outside the range (100 µm - 10 µm) or (150 µm + 10 µm) will cause the reading to flash
and the unit to hold until the reading is either accepted by pressing [ENTER], or rejected by pressing [DEL].
If reasonable limits are set to 0%, every reading outside the high and low limits will require user action. If
reasonable limits are set to 99%, the reasonable limit function is switched off. A different value can be
applied to each limit.
To set reasonable limits, press [SETUP] and use [<] or [>] to select:
The display will show 'Hi'
Press [ENTER] and use [<] or [>] to adjust the value up or down.
Press [ENTER] to se the correct value (or [Esc] to cancel the operation).
The display will show 'Lo'
Press [ENTER] and use [<] or [>] to adjust the value up or down.
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