GE TransPort PT900, User Manual

Page: 81 / 190

Chapter 4. Programming
TransPort
®
PT900 User’s Manual 65
4.4 Programming the FLUID Menu (cont.)
To program the FLUID menu, complete the following steps:
1. The TRACKING WINDOW is used to detect the receive signal when the user
is unsure of the fluid sound speed. Set the TRACKING WINDOW to either
On or Off (the default setting is Off ).
2. Based on your TRACKING WINDOW setting, proceed as follows:
a. If the TRACKING WINDOW is Off , go directly to step 3.
b. If the TRACKING WINDOW is On , enter the values for the MAX
SOUND SPEED and the MIN SOUND SPEED for the application.
3. Select your FLUID from the drop-down list (see Table 5 below) and enter
the expected TEMPERATURE of the fluid during flow rate measurements.
4. If the selected FLUID is water or water-based, the SOUND SPEED is a
constant which is automatically entered in the SOUND SPEED box.
5. If you selected OTHER as the FLUID , the automatic entry in the SOUND
SPEED box must be changed to the correct value by user.
6. The fluid KINEMATIC VISCOSITY (see GE document 916-119 ) is used to
calculate the Reynolds Number , which is then used calculate the Reynolds
Correction .
7. The AVERAGE FACTOR is a factor applied to all measurements of the
current channel when calculating the average measurement for CH1 and
CH2. For example, if the pipe ID for both channels is the same and the
AVERAGE FACTOR for both channels is set to 0.5, then the flow velocity for
the Average Channel = 0.5 x CH1 + 0.5 x CH2.
The available FLUID types depends on the current setting for the TRACKING
WINDOW (see Table 5 below).
Table 5: Available Fluid Types
Tracking Window Off Tracking Window On
Other Lube Oil (X200) Other
Water Oil Water
Water/Glycol Methanol Water/Glycol
Sea Water Ethanol Oil
Oil (22°C) LN2 (-199°C)
Crude Oil Freon (R-12)