GE DigitalFlow DF868 Programming Manual page 41

Calculating Kinematic
Viscosity
Entering a K-factor Table
Programming Site Data
Use the KVTab option to calculate the kinematic viscosity (KV)
based on signal strength (SS) or temperature. To use this option, you
must select either a static KV value (entered at the Kinematic
Viscosity prompt in the PIPE submenu), a table of KV/SS values
(entered in the KV/SS submenu, discussed on page 1-60), or a table
of temperature vs. viscosity values (entered in the TmpKV submenu,
discussed on page 1-61).
ADVAN
1. At the window, press
Selection.
[F1]
2. Press to use a static KV value,
[F3]
SS values, or to activate a temperature vs. viscosity table.
a. If you select Tmp/KV, the program asks for the specific Fluid
[F1]-[F3]
Table. Press
The DF868 returns to the
Use this option to enter a table of K-factors. K-factors are used to
create a curve for the flow range (based on velocity or Reynolds
number) that compensates for non-linear flow rates. The DF868
accepts from 2 to 20 pairs. Complete the following steps to enter
multiple K-factors:
ADVAN
1. At the window, press
[F1]
2. Press to disable this option, or
Factors. If you select
Features
prompt.
3. At the Custom Type prompt, press
[F2]
values, or to customize Reynolds values.
[F1]
4. Press to retain the current K-factor table, or
Factor Table. If you select NO, the DF868 returns to the
Features
prompt.
Note: If the necessary velocity/Reynolds vs. K-factor data was not
provided with the DF868 documentation, the K-factor table
cannot be edited.
5. Enter the Number of K-factors to be entered into the table (from 2
[ENT].
to 20) and press
IMPORTANT:
When editing the K-factor table, the velocities must
be entered in increasing order.
6. Enter the Velocity (or Reynolds) Value for K-factor number 1 and
[ENT].
press
7. Enter the K-factor corresponding to the velocity or Reynolds
[ENT].
number 1 and press
VELOCITY# REYNOLDS #
The (or
pair. After you have entered all the pairs, the meter returns to the
Advanced Features
prompt.
[F1] =KVTab
to select KV Input
[F2]
to activate the table of KV/
to select the desired table.
Advanced Features
prompt.
[F2]=MultK
to select Multi K Factors.
[F2]
to Activate Multiple K
NO
, the DF868 returns to the
[F1]
to customize velocity
K FACTOR
) and prompts repeat for each
March 2008
Advanced
[F2]
to Edit the K
Advanced
1-33