DigitalFlow™ DF868 Multipurpose Ultrasonic Liquid Flowmeter Programming Manual (2-Channel)
17
Chapter 1. Programming Site Data
1.6.3.7
Tracking Windows
Note:
This step only appears if you have selected Transit-Time.
10.
Press
[F1]
if you do not want
Tracking Windows
, or
[F2]
if you want to enable the windows. (Tracking windows are
used to detect the receive signal when you are unsure of the fluid soundspeed.)
1.6.3.8
Fluid Type
11.
Use the
[F1]-[F4]
and [
keys to select the
Fluid Type
. The selections for the fluid type vary, depending on
whether:
• the
ENERGY OPTION
is
ON
or
OFF
; and
• the
TRACKING WINDOW
is enabled or disabled.
Refer to Table 9 if
ENERGY OPTION
is
OFF
, or to Table 10 if
ENERGY OPTION
is
ON
.
Note:
Some of the fluid types may require additional selections as shown in the following tables.
1.6.3.9
Reynolds Correction
12.
Press
[F1]
to turn
Reynolds Correction
off, or
[F2]
to turn it on.
Note:
Reynolds Correction is a number based on the Kinematic Viscosity and flow rate of the fluid. It should be
enabled for most applications. Also, if you have enabled a temperature compensation table (see page 48),
a message indicates that the table is active.
13.
When you enable the Reynolds Correction Factor, you must also enter the
Kinematic Viscosity
of your fluid, as
listed in
Sound Speeds and Pipe Size Data.
Use the numeric keys to enter a value, and press
[ENT].
1.6.3.10 Calibration Factor
14.
Enter a value for the flow
Calibration Factor
and press
[ENT]
. The default value is 1.00, but values between 0.50
and 2.00 may be entered.
Table 9: Fluid Types for ENERGY OFF
Tracking Windows =
NO
Additional Selections
YES
Additional Selections
WATER
Select
NORML
or
SEA
and press
[ENT]
. If
NORML
is
selected, enter the Water Temperature and press
[ENT]
.
W100
No additional selections required.
OIL
Select
LUBE
or
CRUDE
and press
[ENT]
.
W260
No additional selections required.
METH
No additional selections required.
OIL
No additional selections required.
ETH
Enter the Fluid Soundspeed and press
[ENT]
.
OTHER
Enter the Minimum Soundspeed and press
[ENT]
. Then enter the Maximum
Soundspeed and press
[ENT]
.
LN2
No additional selections required.
FREON
No additional selections required.
OTHER
Enter the Fluid Soundspeed and press
[ENT]
.
Table 10: Fluid Types for ENERGY ON
Tracking Windows =
NO
Additional Selections
YES
Additional Selections
WATER
Enter the Water Temperature and press [ENT].
W260
No additional selections required.
MIXED
Enter the Fluid Soundspeed and press
[ENT]
. Enter
the Percentage of Water and press
[ENT]
.
MIXED
Enter the Percentage of Water and press
[ENT]
.
OTHER
Enter the Fluid Soundspeed and press
[ENT]
.
OTHER
Enter the Minimum Soundspeed and press
[ENT]
. Then enter the Maximum
Soundspeed and press
[ENT]
.