RS Pro RS-8920 Manual De Instrucciones página 7

Pressure and Flow Meter / English
5-12.Measuring Velocity
The Meter uses standard ambient conditions (temperature=21.1 °C/70 °F, barometric
pressure= 14.7 PSI / 1013 mbar), to approximate actual velocity and flow.
The primary display number is air velocity, the device measures air velocity, and it
features 5 selectable units of velocity measure: m/s, ft/min, km/h, MPH, knots.
• Press "P/V/F" to enter Velocity mode and press "Unit " to select unit.
• Connect the hoses to the pitot tube and to the Meter. The "Input (+)" pressure port on
the Meter connects to the white hose from the total pressure connection of the pitot
tube. The "Ref (-)" pressure port on the Meter connects to the black hose from the
static pressure connection of the pitot tube. the tubing open to ambient conditions
press and hold "Hold/Zero" for 2 seconds to zero out the display.
• When make the measurement, the pitot tube tip should against the measured wind as
shown in upper figure, and ensure that the axis of the duct is aligned with the fluid
flow for ±10°. If Measure Velocity measures negative and show "Error"on the display,
check to make sure that the hoses are attached to the correct ports on the Meter and
the pitot.
input (-)
C
TEMP
PRESS
Pa
MEM
Avg
Rec
Unit
Unit
Save
Clear
MAX Hold
MIN
Zero
P/V/F
10
Pitot Tube Connection
5-13.Measuring Flow
• Press "P/V/F" to enter air flow mode and press "Unit " to select unit.
•The Meter shows the duct shape and size. The Meter stores the last duct shape and
size that is entered. If the duct is different than the stored version, press "Setup
button to find the proper duct type for the measurement (rectangular or round). Refer to
Step duct shape and parameters setting.("Changing Setup Options.")
Notes:
HOLD, Save, MIN/MAX/AVG, Zero, and Setup can be used when measuring pressure,
velocity and flow.
5-14.Displaying Temperature
Ambient temperature is displayed on the secondly show as a reference. The temperature
can be displayed in either °C or °F. Press "Unit " to select unit °C or °F.
5-15.Holding the Displayed Readings
• Press "Hold/Zero" to freeze the readings on the display .The display shows HOLD.
• Press "Hold/Zero" again to turn off the HOLD function
5-16.Viewing the MIN, MAX, and AVG Readings
• Press "MAN/MIX" to step through the maximum (MAX), minimum (MIN), or the average
(AVG) readings. The elapsed time since entering MAX/ MIN/AVG mode, or the time at
which the minimum or maximum occurred appears on the display.
• Press "P/V/F" to show the maximum, minimum, and average of pressure, velocity or
flow, and temperature value.
• Press "MAN/MIX" button for 2 seconds to to exit MAX/MIN/AVG mode.
5-17.Saving Samples
The Meter saves various samples in its three major modes. To save a sample, do the
following:
•When taking a sample, press "Save/Clear" to store the sample. The Meter can save up
to 99 samples in each of its three modes.
•If the memory is full (99 samples have been stored), more samples cannot be stored. If
the user attempts to store another sample, the Meter shows "FU" and does not save new
readings.
Pressure and Flow Meter / English
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