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4.
Set the solid-state output to act as a High-High alarm.
a. Select digital signalling mode at Menu 17:
Press the BLUE button for about a second: the display should read S:co. This
indicates that the solid-state switch will open when the range value is at or
above the Upper Threshold setting (menu 15).
b. Set the High-High alarm activation: set the reading at menu 15 to 90.
c. Set the High-High alarm deactivation: set the reading at menu 16 to 86.
This setup act as a FailSafe mode because when the range value exceeds the threshold
settings, the solid-state output will open, producing the same result as a loss of power to
the transmitter or faulty wiring to the solid-state output.
Delta Range Setting application
1.
Setting overfill protection
Delta Range Setting can be used to set an Upper Range Value (URV) in applications
where it is difficult or impossible to raise the product to that level. In this case you take
the actual value for the highest normal process level as Lower Range Value (LRV), and
apply Delta Range setting. This adds the minimum span to LRV, and updates URV.
Example: Normal process conditions are for the level to be at or below the level set for
LRV (0%).
•
It is impossible to raise the level high enough to take the actual value for URV.
•
Switching must be guaranteed.
Set 2-state signalling and Upper Range Value to ensure the level never rises above the
product exit opening:.
updated URV
after Delta Range setting applied
1
7ML19985GG03
menu 0E LRV 0%
product exit
product entry
Pointek CLS500 – INSTRUCTION MANUAL
75.8 pF
72.5 pF (Highest level under
normal conditions)
Page 97
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