Programming Site Data 1-61
March 2008
Entering Temperature vs.
Viscosity Tables
The TmpKV submenu enables you to enter temperature vs. viscosity
tables for up to three petrochemical products. Users can program the
names of each product, along with temperature vs. viscosity data
points for each table. To apply the tables, you must program the
DF868 to use the table for the desired fluid (discussed in Calculating
Kinematic Viscosity on page 1-33), and program the temperature
input source (as shown in Setting Up Temperature Inputs on
page 1-22).
Once the tables are applied, the DF868 automatically performs the
following steps:
1. It accepts the input from the programmed temperature source.
2. It calculates the fluid viscosity using linear interpolation from the
tabulated fluid data.
3. It performs a dynamic calculation of the Reynolds number.
4. It calculates the appropriate K-factor using the standard Colebrook
relationship.
Entering the Fluid Label
and Name
1. To enter the GLOBAL menu, press [F3]=GLOBL.
2. To enter the TmpKV submenu, press [→] and [F2].
3. At the Temp/KV Fluid Table prompt, press
[F1]-[F3] to select the
table for data entry.
Note: Key [F1] for Fluid #01 is used as an example in the following
steps.
4. Edit the current Label (FL#01) to any desired label with a
maximum length of five characters (as shown in Table 1-1 on page
1-3). Press
[ENT].
5. Edit the current Name (Fluid #1) to any desired name with a
maximum length of 11 characters.
Entering the Table Data 6. Enter the desired # of Table pairs (2 to 20), and press [ENT].
IMPORTANT: At the next prompt, the temperature values entered
must be in the range of -148 to 662°F or °C. The
values will appear as °F if the meter is set for
English units or °C if the meter is set for metric units.
Temperature values must be entered in ascending
order.
7. Press
[ENT] to accept the current Temperature value or enter a new
value (with up to four decimal places) and press
[ENT].
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