This document is about the instruction of 922 Pitot Tube.
The document provides instructions for using the Fluke 922 Pitot Tube in conjunction with the 922 Airflow Meter. It details how to measure total pressure (TP) and static pressure (SP) to calculate velocity pressure (VP) according to the equation VP = TP - SP.
Safety guidelines are provided, noting that the device contains no user-serviceable parts and should be returned to Fluke for service if needed. The text also references ASHRAE standard 111-1988 regarding the number of measurement points required for accurate duct traverses in both rectangular and circular ducts.
It is used with the 922 Airflow Meter to ensure accurate pressure, velocity, and flow measurement.
A minimum of 25 points should be measured in a rectangular duct traverse.
Readings must be taken from areas that are no more than 6 in. apart.