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Calibration (Sub-Menu): Dial-A-Pipe ID, Insertion Depth, Dial-A-Pipe Type
This instrument can be moved to different pipe sizes and types as needed and perform precision
flow measurement. This capability is called Dial-A-Pipe and is a powerful and unique feature of
the InnovaMass 241i immersible thermal mass flow meter.
The internal pipe diameter (ID), insertion depth, and pipe type are very important factors when
considering flow profile. The 241i uses internal pipe diameter (ID), insertion depth, and the pipe
type to mathematically model the flow profile and enable Dial-A-Pipe.
Adjustment can also be done using the SIP (Smart Interface Portal) Software. It is recommended
to use the SIP to perform Dial-A-Pipe since the process is more automated.
The Dial-A-Pipe Process Requires 3 Steps:
Step 1: Setting Pipe Inner Diameter (ID)
Step 2: Setting Insertion Depth
Step 3: Setting Pipe Type
Dial-A-Pipe Step 1:
Navigate to the “Dial-A-Pipe ID” screen. Use Table 3: Calibration Sub-
Menu for guidance.
The display will show pipe inner diameter in the units selected. In the example below the inside
diameter of the pipe is 6.065000 inches.
Press enter
to cause the first digit (the 6 in 6.065000 in our example) to begin flashing. Use
the up
and down
arrows to select the value 0 to 9. Once done, use the right key to move on
to the selected significant digit. Once the I.D. value is selected, use the up
and down
keys s
to select the desired units.
I.D. Units:
in: inches
M: meters
mm: millimeters
ft: feet
It is vital to use the correct I.D. and units of the pipe where the instrument is located. If the
schedule of the pipe is known, the I.D. can be looked up from pipe tables. If the pipe outer
diameter and wall thickness is known, the I.D. can be calculated. If you do not have a round pipe,
you must enter the equivalent round I.D. There are various methods of calculating this.
Here’s an easy calculation to give you the hydraulic diameter (H
D
):
Hydraulic Diameter = H
D
H
D
= 4A
A= Cross sectional area of duct
P
P = Wetted perimeter of duct
Dial-A-Pipe ID
6.065000 / In
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