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Chapter 4. How To
This chapter explains how to perform a variety of operations:
Select a Tool/Probe
Set the Time and Date
Change the Currently Selected Test ID
Recall Sample Data
Delete Sample Data
Delete All Sample Data
Select/Set a K-factor
View/Set Standard Pressure and Temperature
Set Units of Measure for Temperature, Pressure, Flow and Humidity
Select the RS232C Output Device (Computer or Printer)
Set the Baud Rate
Set the Date and Decimal Format
Set Display Mode for Running Average or Single
Select Discrete or Continuous Logging
Turn Back Pressure Compensation On and Off
Take Back Pressure Compensated Hood Readings
Set Deadband On and Off
Calibrate the Micromanometer
Select User Calibration or Factory Calibration
Connect and Download to a Printer
Connect and Download to a Computer
Data Acquisition (Polling)
Note: The operations described below assume you are starting from the READY display. As you use the
instrument, you will find it unnecessary to return to the READY display each time. Press the ESC
key (one or more times) to return to the READY display.
Select a Tool
The instrument accepts a number of different measurement devices, referred to as Tools. The Tools are:
Capture hoods for measuring flow from grilles and diffusers.
A velocity matrix for area-averaged multi-point velocity measurements.
Pitot tubes for flow and velocity measurements.
Air Flow probes for flow and velocity measurements.
A Diffuser Flow tool which can calculate flow for diffusers equipped with differential pressure taps.
(The Diffuser Flow tool is a flow calculation method, not a physical device.) For the Diffuser Flow
tool, flow is calculated from the square root of pressure times a user entered K-factor.
Table 3 identifies each Tool and the units of measure available for that tool.
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