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Pointek CLS500 – INSTRUCTION MANUAL
Page 35
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Grounding Examples: Pointek CLS500
Grounding is important for two reasons:
1.
To prevent interference to the signal: system grounding
2.
For safety purposes: safety grounding
Several common applications are illustrated. They are separated into two groups: the first
group illustrates System Grounding and the second illustrates Safety Grounding.
System Grounding (referencing)
For the measuring system to function correctly, the reference electrode must be properly
grounded. Make sure that there is a reliable connection from the instrument housing to
the reference electrode (usually the wall of a metal tank
1
). Some common applications
involving system grounding include:
• metal tanks
• metal tanks, cathodically protected
• non-conductive tanks
1.
If the grounding reference is not the tank wall, connect the ground lug to another
object that has conductive characteristics and that is reliably grounded.
Metal Tanks
If the metal tank is reliably
grounded, connect the ground lug
on the Pointek CLS500 to the earth
ground on the tank as shown.
(See page 33 for connection
diagram.)
ground lug
metal