Within this menu, use the Fwd and Back arrows to change between different options and to move about within each option, use Up and Down arrows to alter settings. Date and time formats are specified using Setup Menu 5, Date and Time Formats. This guide is written using the factory default settings.
Option 1, Date
This option allows you to set the date.
Option 2, Time
This option allows you to set the time.
Battery Voltage cannot be adjusted, but is displayed for reference.
8.10Setup Menu 5, Date & Time Formats
Option 1, “Date”
Toggles between “MT/DT/YR” or ”DT/MT/YR” date format.
Option 2, “Time”
Toggles between “AM/PM” or ”24 Hr” time format.
Option 3, “Auto Off”
Toggles between “Enable” or “Disable”
8.11Setup Menu 6, PTV and PTVM (formerly Leakage & Leakage Correction Factor)
There is a very small gap between the piston and the interior of the glass flow cylinder, allowing a known volume of gas to leak past during calibrations. This is the underlying operating principal of the Sierra Cal=Trak, and what allows the elimination of fluid seals used in earlier piston prover designs like the Sierra Cal=Bench. At low flows, the fixed leakage past the piston becomes a greater percentage of the overall measurement uncertainty. The leakage of each individual flow cylinder is quantified at our factory using nitrogen, and entered into the Cal=Trak as the Piston Tare Value (PTV), to be factored into subsequent readings. This is part of the factory calibration.
The Leakage rate is based upon the viscosity of nitrogen. For proper calibration with gases other than nitrogen (or air), the PTV multiplier
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