Philips EverFlo Q Service And Technical Reference Manual page 102

Feature
Gauge and Chart Pressure measurement of the product tank in PSI Used to measure the balance and
peak pressure. To be used to check the sieve canister balance. 15-27 PSI range
Estimated Flow Estimation of flow rate in liters per minute from EverFlo product tank, derived from the
pressure slope.
Serial ID, Birthdate, Factory supplied identifier and date/time from the flash memory. Internal timer which
Time, Model resets to zero when the device is reset or powered off. Model number and Serial
Number are enabled for edits to the PCA based on the device label.
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Definition
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1039055, VER. 06