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H. CONVERSION FROM VELOCITY TO VOLUME

The velocity readings taken from the UFX can be readily converted to

volumetric flow rate measurements such as GPM (gallons per minute)

or LPM (liters per minute). A chart is located on page 13 of this manual

that contains conversions for many popular schedule 40 pipe sizes. If

the pipe size is not located in this chart, use the following equations:

♦

For conversion to GPM (pipe I.D. in inches):

♦

For conversion to LPM (pipe I.D. in millimeters):

I. LOW BATTERY INDICATION

When the power supply batteries become drained to a level of 4 volts,

the LOW BAT icon will illuminate on the right-hand side of the display.

Typical alkaline batteries will provide about 2 hours of operation after

the LOW BAT icon turns on. The flow meter will no longer operate

when battery voltage is less than 3.5 volts. At 3.5 volts and lower, an

Err1 will be displayed and then unit will shut off.

Replace the batteries by removing the two screws located on the upper

portion of the enclosure back. Install four fresh AA alkaline batteries

following the polarity indicated within the battery compartment and re-

place the battery cover. A fresh set of alkaline batteries will provide

approximately 30 hours of service. Use of carbon-based batteries is

not recommended.

Do not allow discharged batteries to remain in the UFX during storage.

Discharged batteries can leak and may cause severe damage to the

internal circuits of the UFX. Damage caused by leaking batteries will

not be covered under the manufacturer's warranty.

J. DISPLAY TEST

The UFX contains software to verify operation of the individual LCD

segments. To run the display test, turn the UFX off. Press and hold the

FT/SEC - M/SEC key, then press the ON/OFF key. Release both keys

and verify that all segments illustrated in Figure 4 illuminate. The UFX

firmware version number (FX.XX) is displayed at the end of the test.

GPM = FT/SEC x 2.448 x I.D.

LPM = M/SEC x 0.047 x I.D.