Check Cell - Fuji Electric ZSS-8 Series Instruction Manual

6.11 Check cell

6.11.1 Usage
The check cell is intended to be used to check a deviation of the span point without removing the device
from the stack. However, if the gas concentration inside the stack is not stable, the check is unavailable.
You cannot check the zero point as far as the measured gas exists in the stack.
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INZ-TN8ZSS-E