Pressure (Zero) Key (Models 8385/8385A/8386/8386A Only) - TSI Instruments VelociCalc Plus 8384 Operation And Service Manual

Air velocity meters

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size of the duct, then press ENTER to accept the choice and return to

measuring.

•

If horn is chosen:

Use

to scroll through horn numbers shown on the display (100,

300, 600, 1200) and K

NOTE: The horn numbers are the models of the horns. For example,

100 refers to a horn model number AM 100. Only horns with Model

numbers as follows can be used with this function: AM 100, AM 300,

AM 600 and AM 1200. If a horn model number is chosen, the

instrument will return to measuring mode and use a preprogrammed

curve to calculate flow rate from velocity. If K

choices will be shown in the following order: last 5 values used, then a

new value which can be adjusted from 0.01 to 999.9. Use the

scroll through the K

NOTE: This measurement can only be made with the thermal

anemometer sensor, not the Pitot tube.

•

If pressure units (in H

chosen:

keys to select the K factor, then press ENTER to accept the

Use

choice. The K factor choices will be shown in the following order: last

5 values used, then a new value which can be adjusted from 0.01 to

999.9. You can zero the pressure while in flow rate from pressure

mode by pressing and holding the pressure key for three seconds. The

unit will double beep to confirm that the pressure has been zeroed.

NOTE: This measurement method is intended for use with diffusers

with pressure taps and a manufacturer-supplied K factor.

When measuring velocity or flow rate, and the measurement type is

changed, the next time the VELOCITY/FLOWRATE key is pressed, the last

measurement used will be displayed. For example, if you were measuring

flow rate, switched to measuring humidity, and then back to VELOCITY/

FLOWRATE, the V

you were measuring velocity, then humidity, and returned to VELOCITY/

FLOWRATE, the instrument will return to velocity.