March 2008
1-34 Programming Site Data
Activating Mass Flow Use this option to calculate mass flow from a static fluid density.
Complete the following steps to enter the fluid density:
1. At the
ADVAN window, press [F3] (MASS) to select Mass from Static
Density.
2. Press
[F1] to disable the Mass from Static Density option, or [F2] to
enable mass flow. If you select NO, the DF868 returns to the
Advanced Features option.
3. If you enable mass flow, the meter requires the fluid density
(0.062 to 624.220 lb/ft
3
). Use the numeric keys to enter the
density, and press
[ENT]. The meter returns to the Advanced
Features
prompt.
Entering Code Length Use this option to select the size of the transducer transmission signal.
The option is helpful when measuring flow on small pipes. Five
selections are available:
• AUTO - The meter will determine the code length (short or long)
automatically, based on pipe size and transducer type.
• 1-bit - special use only (consult the factory before using)
• 2-bit - special use only (consult the factory before using)
• 4-bit - The 4-bit option consists of only a few pulses with no built-
in code pattern. This option aids in cases where a small pipe
diameter does not give each transducer the time necessary to send
a series of signals before receiving a series of signals. It is also a
good selection for pipes made of materials which tend to blur the
signal pattern, such as PTFE.
• 11-bit - The 11-bit option consists of a series of approximately one
dozen pulses with a distinctive binary pattern that the meter can
easily recognize during auto correlation.
Complete the following steps to select the code length:
1. At the
ADVAN window, press [F4] (CODEL) to select Code Length.
2. Use the [→] and
[F1]-[F4] keys to select the desired option.
The meter returns to the
Advanced Features prompt.
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