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16
Installation and Operation
Manual
Series A3 & A4
Dampening (Damp)
– The control takes a pressure sample every 100
milliseconds. The dampening coefficient tells the control how many
readings to average for the displayed value. Displaying readings with too
few samples averaged may cause unstable readings as a result of vibration or
pressure fluctuations.
value
– Number of samples averaged for the displayed value
Screen Saver (Saver)
– When the control is in normal operation the screen
saver displays only the units of measure on the LCD or OLED display.
When the screen saver is in use, touching any button on the face of the
control will display the main menu. If turned off, the programming screen
will display the parameters in the main menu.
Off (Off)
– Turns the screen saver function off
On (On)
– Turns the screen saver function on
WARNING: NOT USING THE SCREEN SAVER WITH THE SERIES A4
MAY CAUSE THE OLED DISPLAY TO BURN IN.
Contrast (Contr)
– This allows the image and contrast of the programming
display to be adjusted.
Normal low (N-lo)
– Normal image, low contrast
Normal medium (N
-med) – Normal image, medium contrast
Normal high (N
-hi) – Normal image, high contrast
Inverted low (I
-lo) – Inverted image, low contrast
Inverted medium (I
-med) – Inverted image, medium contrast
Inverted high (I
-hi) – Inverted image, high contrast
K Factor (Kfact) –
For flow and velocity, it is necessary to enter the flow
coefficient of the flow sensing device you are using (pitot tube, orifice plate,
etc.). This value should be specified by the manufacturer of the device.
value
– coefficient (0.01 to 99.99)
Duct Shape (Xsect)
– For flow measurement, it is necessary to calculate the
area of the duct where the measurement is being taken. The first step is to
determine the shape of the duct.
Rectangle (rect)
– For a rectangular or square duct
Circle (circ)
– For a circular duct
Duct Diameter (diam)
– For circular ducts, enter the diameter for the area
calculation.
value
– Diameter in inches (or meters)
Duct Width & Height (X dim, Y dim)
– For rectangular ducts, enter the
width and height for the area calculation.
value
– Height and width in inches (or meters)
