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It is important to complete the zeroing in an environment where there is no flow or pressure
and ensure that the end of the flow tube is not exposed to any external flows or pressures.
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Connect the open end of the gas flow tube to the gas tap or sample point on the pipework to be
checked.
Open the gas tap and press the Right Soft Key to begin sampling.
The Right Soft Key will toggle the sampling process on and off.
When the sample is active the screen will display live readings being taken from the gas.
When the sample is stopped the values are “frozen” at the last measured values.
Pressing the Left Soft Key, labelled “Store”, or the OK Key will bring up the Store Menu Window. For
details of the "Store" function please see page 47.
Pressing the Middle Soft Key, labelled “Zero”, will zero DP and SP readings on the screen.
Pressing the Left Key will navigate to Gas Display 2 and pressing the Right Key will navigate to the
Velocity Display.
When finished turn off the gas tap and remove the gas pipe.
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