DCT7088
PORTABLE DIGITAL CORRELATION
TRANSIT TIME ULTRASONIC FLOWMETER
USER MANUAL
P/N 1-0561-007
Rev C (04/04)
DCT7088 PORTABLE TRANSIT TIME
ULTRASONIC FLOWMETER
FIRMWARE
VERSIONS 6.00 ONWARD
USER MANUAL
APRIL 2004
REV. C
NOTICE
Read this manual thoroughly before working with the product. For personal and system safety
and for optimum performance, make sure you thoroughly understand the contents before
installing, using, or maintaining this instrument.
For equipment service needs outside the United States contact your nearest Thermo Electron
representative. Within the United States, Thermo’s service department is your single-point
contact for all Thermo equipment service needs. If at any time you are not sure what to do, you
have a question about using the product, or you have a service or support request, call Thermo
at 713.272.0404.
Thermo Electron Corporation
Process Instruments division
9303 W. Sam Houston Parkway S.
Houston, TX 77099 USA
Phone: 713.272.0404
Fax: 713.272.4573
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TABLE OF CONTENTS
1. Product Overview ................................................................................................................................. 1
1.1 Introduction....................................................................................................................................... 1
1.2 Theory of Operation .......................................................................................................................... 1
1.3 Transit Time Accuracy....................................................................................................................... 2
1.4 Ordering............................................................................................................................................ 3
1.5 Technical Specifications.................................................................................................................... 3
1.5.1 Performance ............................................................................................................................... 3
1.5.2 Functional............................................................................................................... ..................... 4
1.5.3 Physical ...................................................................................................................................... 4
1.6 External Features .............................................................................................................................. 5
1.7 Breakout Box Components ................................................................................................................ 6
2. Wiring the Current Loop...................................................................................................................... 7
3. Configuring & Operating the Flowmeter ............................................................................................. 8
3.1 The Keypad & Display ...................................................................................................................... 8
3.1.1 Components ................................................................................................................................8
3.1.2 Display Contrast & Backlight ....................................................................................................... 8
3.2 Direct Menu Access.......................................................................................................................... 8
3.3 Using the Arrow Keys to Access Menus ............................................................................................ 9
3.4 Flowmeter Configuration Using Setup Menus .................................................................................. 10
3.5 Quick Setup Configuration ...............................................................................................................11
3.6 Primary Displays ............................................................................................................................ 14
3.6.1 Flow/Net T ot alizer (00) ............................................................................................................... 14
3.6.2 Flow/Velocity (01)....................................................................................................... ............... 14
3.6.3 Flow/Positive Totalizer (02) ........................................................................................................ 14
3.6.4 Flow/Negative T o talizer (03) ....................................................................................................... 14
3.6.5 Signal Strength/Low Signal Cutoff (04) ...................................................................................... 14
3.7 Additional Setup Menus Within the PIPE Submenu......................................................................... 15
3.8 Additional Setup Menus Within the LINER Submenu....................................................................... 15
3.9 Additional Setup Menus Within the FLUID Submenu....................................................................... 16
3.10 Additional Setup Menus Within the FLOW Submenu..................................................................... 16
3.1 1 Additional Setup Menus Within the TOT AL Submenu ..................................................................... 18
3.12 Additional Setup Menus Within the OPTIONS Submenu................................................................ 19
3.13 Additional Setup Menus Within the CALIBR Submenu .................................................................. 22
3.13.1 Zero Set Calibration................................................................................................................. 22
A. Zero Flow Set Method.................................................................................................................. 23
B. Manual Zero Set .......................................................................................................................... 23
3.13.2 Scale Factor Calibration .......................................................................................................... 24
3.13.3 Other CALIBR Submenu Options.............................................................................................24
3.14 Additional Setup Menus Within the 4-20 mA Submenu.................................................................. 25
3.15 Additional Setup Menus Within the ALARMS Submenu ................................................................. 27
3.15.1 Programming the Alarm .......................................................................................................... 27
3.15.2 Viewing Alarms ........................................................................................................................ 28
3.16 Additional Setup Menus Within the DA TA LOG Submenu .............................................................. 28
3.17 Additional Setup Menus Within DIAGNOSTICS Submenu ............................................................. 30
3.18 Additional Setup Menus Within PRINT Submenu........................................................................... 31
.....Table of Contents
4. Wiring & Installing the Transducers .................................................................................................. 33
4.1 Wiring ............................................................................................................................................. 33
4.2 Site Selection & Preparation ........................................................................................................... 33
4.3 Sp acing & Mounting the T ransducers.............................................................................................. 35
4.4 Transducer Mounting Methods ........................................................................................................ 37
4.4.1 V Method ................................................................................................................................... 37
4.4.2 W Method.................................................................................................................................. 38
4.4.3 Z Method ................................................................................................................................... 39
4.4.4 WV and WW Methods .............................................................................................................. 42
4.5 Small Pipe Applications................................................................................................................... 42
5. Emergency Overrides & Master Erase .............................................................................................. 45
5.1 Emergency Overrides ..................................................................................................................... 45
5.2 Performing a Master Erase ............................................................................................................. 45
6. Maintenance & Troubleshooting........................................................................................................ 46
6.1 Replacing the Fuse ......................................................................................................................... 46
6.1.1 Flowmeter Fuse ......................................................................................................................... 46
6.1.2 Breakout Box Fuse .................................................................................................................... 46
6.2 Charging the Printer Battery ........................................................................................................... 46
6.3 Charging the Flowmeter .................................................................................................................. 47
6.4 Replacing Sonic Coupling Compound ............................................................................................. 47
6.5 Troubleshooting & Support .............................................................................................................. 48
6.5.1 General ..................................................................................................................................... 48
6.5.2 Local Representative Support .................................................................................................... 48
6.5.3 Service & Returns ..................................................................................................................... 48
6.5.4 Upgrades................................................................................................................................... 49
6.6 Warranty S tatement ........................................................................................................................ 49
Appendix A: Pipe Schedules .................................................................................................................. 50
Appendix B: Fluid Properties................................................................................................................. 54
B.1 Fluid Sound Velocities & Kinematic V iscosities............................................................................... 54
B.2 Clean Water Sound S peed V ersus Temperature ............................................................................. 67
B.3 Relationship Between Specific Gravity, Viscosity, & Sound Velocity for Petroleum Products.... 68
Appendix C: Monitoring & Downloading Data Logs Using D-Link ...................................................... 69
C.1 Installing D-Link.............................................................................................................................. 69
C.2 Establishing Communications with a Flowmeter .............................................................................. 69
C.3 Monitoring Data Logs ..................................................................................................................... 70
C.4 Saving & Loading Data Logs .......................................................................................................... 71
1. PRODUCT OVERVIEW
1.1 Introduction
The DCT7088 Digital Correlation T ransit Time Flowmeter is a microprocessor-based instrument which
measures the flow of clean, homogeneous liquids (liquids without large concentrations of suspended
particles or gasses such as air bubbles). The flowmeter is noninvasive, which means that it measures flow
from outside the pipe. Its transducers can be mounted to a pipe within a matter of minutes, and flow
measurements may be made without interrupting the flow or modifying pipe work.
The DCT7088 can be configured using an integral keypad for entering variables such as pipe size, pipe
material, wall thickness, and fluid type (refer to Section 3, page 8). The flowmeter can also be remotely
configured and monitored via the RS232 interface mode using the D-Link data link utility (refer to Appendix
C, page 69). Another alternative to flowmeter configuration is to use the UltraScan utility which also
graphically analyzes the signal in a Microsoft® Windows® environment (UltraScan manual provided on
PolyCD).
1.2 Theory of Operation
Sound waves travel in fluids at a specific velocity depending on the type of fluid. If the fluid is moving, the
sound wave travels at a velocity equal to the sum of the speed of sound in the fluid and the velocity of the
fluid itself relative to the transducer . A sound wave traveling in the same direction as the fluid flow (downstream) will arrive sooner than a sound wave traveling against the flow (upstream). A transit time flowmeter
operates by measuring both the absolute travel time of each sound wave and the difference in time
required for the waves to travel between an externally mounted downstream and upstream transducer
(Figure 1.2-A, below). Based on the transit time of the 2 sound waves, the flowmeter calculates the
average fluid velocity .
Once the differential transit time is calculated, several additional variables must be taken into consideration. The overall velocity of the fluid is actually made up of many individual local velocities that vary
according to their distance from the pipe wall. The velocities in the center of the pipe are higher than the
velocities near the pipe wall. The combination of these individual velocities for a specific type of fluid within
a specific pipe yield a velocity distribution known as the flow profile (Figure 1.2-B, page 2), which is a
function of the Reynolds number. By properly configuring the flowmeter, the effects of the flow profile are
taken into consideration when calculating the mean fluid velocity . The flowmeter then multiplies this
velocity by the pipe’s cross-sectional area to obtain volumetric flow .
FIGURE 1.2-A: TYPICAL TRANSIT TIME SYSTEM
1
.....Theory of operation
FIGURE 1.2-B: FLOW PROFILES
1.3 Transit Time Accuracy
Noninvasive ultrasonic measurements are subject to a variety of effects that can influence measurement
accuracy . All ultrasonic instruments are velocity measuring devices and only infer volumetric flow from the
operator-entered parameter of pipe inside diameter (ID). When this value is squared to get cross-sectional
area, a 1% error yields a 2% error in volumetric flow. In practice, commercially fabricated pipe seldom has
ID consistency much tighter than 1%, and unless the pipe to be measured has been accurately measured,
this uncertainty is not reducible through instrument calibration.
The more sophisticated transit time flowmeters incorporate flow profile corrections to compensate for the
pipe’s cross-sectional velocity profile with a changing Reynolds number. However, this requires that the
operator knows the inside roughness of the pipe to be measured. The instrument may infer a roughness if
none is entered by the operator, but that is only an estimate based on the characteristics of new pipe.
Pipes can, of course, accumulate deposits which may not only reduce the ID, but affect the roughness as
well. Errors on the order of 2% as a result of this phenomenon are not uncommon.
While other factors may influence instrument accuracy to a lesser extent, the issues described above are
the major elements of pipe dependency upon absolute instrument accuracy . While calibration on a reference flow loop under known conditions is a useful exercise to determine the accuracy potential of an
instrument, it is not a guarantee of absolute accuracy on different pipes under field conditions.
2
1.4 Ordering
The table below describes ordering information for a standard DCT7088 flowmeter as well as available
options.
MODEL NUMBER
Series: Digital Correlation Transit Time Flowmeters
DCT7088 = DCT7088, RS232 digital interface with UltraScan signal analysis and configuration program
Battery Duration
1 = 8 hours
Transducer Cable Length
16A = 16 ft (5 m)
Additional Options
0704/0188 = Ultrasonic Thickness Gauge (UTG), English units
0704/0187 = UTG, metric units
22334-0001 = Thermal printer kit
Typical Model Number: DCT7088-1-B-16A
1
standard
1
1
2 = 16 hours
XXXXA = increments of 10 ft (3 m) up to 1000 ft (305 m)
TABLE 1: ORDERING INFORMATION
1.5 Technical Specifications
1.5.1 Performance
Flow Range 0 to 40 ft/s (0 to 12 m/s)
Accuracy ±0.5% of velocity or ±0.05 ft/s (±0.0152 m/s), typical, digital output
Sensitivity 0.001 ft/s (0.3 mm/s) at any flow rate, including zero
Linearity ±0.1% of scale, digital output
Pipe Size 1 to 200 in (25 mm to 5 m)
Fluid Homogeneous liquids without gas bubbles
3
.....Specifications
1.5.2 Functional
Outputs 4-20 mA (into 1000 ohms), 12-bit, isolated, loop- or self- powered;
RS232 serial interface
Power Supply Built-in lead acid gel battery providing 8 hours continuous operation
Optional: 16 hours continuous operation
Keypad 19-key with tactile action
Display 40-character, 2-line, alphanumeric, backlit LCD
Data Logger 40,0000 points, time stamped; programmable in 1-second intervals
Programming Via UltraScan utility (supplied with flowmeter) OR integral keypad
T emperature Range Transducers: -40º to +212º F (-40º to +100º C)
Optional – High temperature transducers available
T ransmitter:-5º to +140º F (-20º to +60º C)
1.5.3 Physical
Transmitter NEMA 6 (IP67), waterproof against accidental immersion; splashproof with lid open
Transducers Encapsulated design with standard 16 ft (5 m) cable length
Weight Approximately 1 1 lbs (4.9 kg) with 8-hour battery
Approximately 15 lbs (6.8 kg) with 16-hour battery
4
1.6 External Features
Components
# Description
1 Printer port: Provides
output for optional external
thermal printer. Connects to
special cable which has 3-pin
round connector on flowmeter
end and DB9 connector on
printer end.
2 ON/OFF keys
3 Battery Low light: Activates
after approximately 7 or 14
hours of operation (depending
on battery type). Automatic
shutdown after approximately 1
additional hour.
4 Charging light
5 Instrument on light
6 Fuse: 3-A, 250 V. Protects
flowmeter from battery
overcurrent or short circuits
7 Liquid crystal display (LCD):
Displays configuration
selections, flow rate, totalized
flow, etc.
8 Keypad: Use to enter
configuration parameters and
control flowmeter functions.
9 Downstream transducer
connector
10 Upstream transducer
connector
11 Breakout box interface
connector: Connects flowmeter
to breakout box.
FIGURE 1.6
5
1.7 Breakout Box Components
Components
# Description
1 AC power cable
2 DC power output cable
3 DC power input connector:
Connects DC power output
cable to flowmeter.
4 4-20 mA output terminals
5 Printer charger cable
6 RS232 serial port
7 Breakout box interface
connector: Provides
connections for DC power
input from battery charger/AC
adapter, for DC output cable
for charging battery, for RS232
serial port, and for 4-20 mA
current loop output terminals.
8 7-pin circular connector:
Connects breakout box to
flowmeter.
FIGURE 1.7
6
2. WIRING THE CURRENT LOOP
The 4-20 mA current loop module has an input terminal and an output terminal. Both are indicated on a
label on the inside of the flowmeter door. The current loop output is rated for a loop resist ance of up to 1 k
ohms and is isolated for up to 5 kV when loop-powered.
The 4-20 mA module is shipped with the current loop self-powered. Switch the module to loop power by
moving a jumper on the module. Current loop modules which are loop-powered must be driven from an
external power supply . In this case the flowmeter acts as a passive 2-wire transmitter.
Prevent possible electrical shock and/or damage to the meter – disconnect power
PRIOR to removing back cover of the breakout box and disconnect the breakout
box from the flowmeter and battery charger/AC adapter.
To connect the current loop:
1. Ensure the loop powering option is correct.
2. Locate the jumpers on the upper right corner of the module. Refer to Figure 2.1-A (below) to change
the jumper settings.
3. Refer to Figure 2.1-B (below) for the self-powered option or Figure 2.1-C (below) for the loop-powered
option.
FIGURES 2.1-A (LEFT), 2.1-B (RIGHT, TOP), 2.1-C (RIGHT, BOTTOM)
7
3. CONFIGURING & OPERATING THE FLOWMETER
3.1 The Keypad & Display
The keypad provides access to the microprocessor for flowmeter configuration. During operation, the
instrument’s 40-character LCD indicates flow rate and totalizer values.
3.1.1 Components
Components
# Description
1 LCD
2 Numeric keys: 0 through 9 and decimal (.).
3 Arrow keys: For scrolling up, down, left, right.
4 ENTER key: Operates like the Return (Enter)
key on a computer.
5 ERASE key: Deletes last value entered. In most
setup and diagnostic menus, accesses main
menu. Accesses Menu 00 (flow rate and net
totalizer display) if pressed twice.
6 MENU key: Provides access to setup and
diagnostic menus.
IGURE 3: KEYPAD & DISPLAY FEATURES
F
3.1.2 Display Contrast & Backlight
The display is backlit for ease of viewing in low-light conditions. In order to save battery life, the backlight
shuts off automatically after several minutes have passed without a keypad entry. The display has a
variable contrast setting, and you may need to adjust the contrast on the display as ambient temperature
changes:
1. Press MENU followed by the ± (plus/minus) key.
2. LCD CONTRAST appears on the display with a bar indicating current contrast setting.
3. Press LEFT or RIGHT ARROW keys to adjust the contrast.
4. Press ENTER when complete.
3.2 Direct Menu Access
The unique 2-digit address (reference Table 2, page 9) for each setup and diagnostic menu allows the
user to directly access the desired menu:
1. Press MENU, and the letter M appears in the lower right corner of the display.
2. Enter the desired menu’s 2-digit address.
8
.....Direct menu access
The address must be entered while the M is displayed (within approximately 4 seconds). If the M is no
longer displayed, press MENU again followed by the 2-digit address.
Menu Type Display Menu Menu Type Display Menu
Primary Flow/Net T otalizer 00 Options Measurement Units 42
Flow/Velocity 01 Site Parameters 43
Flow/Positive Totalizer 02 RS232 Configuration 46
Flow/Negative Totalizer 03 Change System Password 47
Signal Strength/Low Signal 04 Change Scale Factor 48
Cutoff Password
Unit ID 49
Pipe Pipe OD 10
Pipe Wall Thickness 11 Calibration 50
Pipe ID 12 Zero Set 51
Pipe Material 13 Scale Factor 52
Pipe Sound Speed 14 Sound Speed 53
Pipe Inside Roughness 15 Compensation
Date and Time 54
Liner Liner Material 16
Liner Thickness 17 Current Loop 56
Liner Sound Speed 18 Current Loop Span 57
Liner Inside Roughness 19 Current Loop Calibration 58
Current Loop Test 59
Fluid Fluid Type 20
Fluid Sound Speed 21 Alarms 70
Fluid Viscosity 22 Program Alarms 71
View Alarms 72
Transducer Transducer Type 23
Transducer Mounting 24 Datalog Datalog Setup 80
Transducer Spacing 25 Datalog Interval 81
Flow Flow Units 30 Diagnostics Signal Strength/Margin 90
Max Flow Range 31 Delta Time/Fluid Sound 91
Min Flow Range 32 Speed
Damping 33 Reynolds #/Profile Factor 92
Low Flow Cutoff 34 Current Loop Output 93
Low Signal Cutoff 35 Software/Firmware Rev. 94
Level
Totalizer T otalizer Units 36
T otalizer Multiplier 37 Print Print Log Setup 96
Net T otalizer 38 Print Settings 97
Positive T otalizer 39 Print Diagnostic 98
Negative Totalizer 40 Print Current Screen 9 9
T ot alizer Reset 41
TABLE 2: MENU ADDRESSES
9
3.3 Using the Arrow Keys to Access Menus
Another method of accessing the flowmeter’s menus is to use the LEFT or RIGHT ARROW keys to scroll
through the menu structure. Menus are organized into 3 basic levels: 1) Main menu, 2) submenus, and 3)
primary displays, setup menus, diagnostic menus. The Main menu displays various submenus, which
contain individual setup and diagnostic menus.
FIGURES 3.3-A THROUGH 3.3-C (TOP TO BOTTOM)
To access the Main menu from any screen:
1. Press MENU twice. The Main menu is displayed
with the Pipe and Liner submenu options as shown
in Figure 3.3-A.
2. To view the remaining submenus (Figure 3.3-B),
press the DOWN ARROW key .
3. When the desired submenu is highlighted, press
ENTER to display the first menu of the selected
submenu. Figure 3.3-C is an example of when the
Flow submenu is selected.
Use the UP or DOWN ARROW keys to view a primary
display , setup menu, or diagnostic menu within the
current submenu.
3.4 Flowmeter Configuration Using Setup Menus
Flowmeter configuration is accomplished using the setup menus. Some setup menus allow a numeric
value to be entered, and others offer non-numeric selections. In non-numeric setup menus, an asterisk is
displayed to the left of the selected currently entered in the flowmeter .
FIGURE 3.4
10
.....Flowmeter configuration using setup menus
To configure the flowmeter:
1. Access the setup menus individually by pressing MENU and entering the 2-digit address OR by
scrolling through the submenus and selecting the desired setup menu.
2. a. If the setup menu requires a numeric entry , use the numeric keys to enter the value and press
ENTER to accept the value. If the numeric value is entered incorrectly, press ERASE to delete the
entry .
OR
b. If the setup menu offers a non-numeric selection, press ENTER, and the asterisk changes to a
flashing cursor. Use the arrow keys to scroll through the available selections. When the cursor is
to the left of the desired selection, press ENTER.
3. Complete the configuration process by accessing a primary display (menus 00 through 04).
The flowmeter does not use the new parameters until you access a primary
display.
3.5 Quick Setup Configuration
The Quick Setup procedure contains the minimal steps required for flowmeter configuration. These steps
enable the flowmeter to calculate transducer spacing, acquire ultrasonic signal, and measure flow . The
number in parentheses after the required menu is the 2-digit address to directly access that menu.
1. Select a proper transducer site according to Section 4 (page 33).
2. Access the Pipe submenu. This submenu contains setup menus related to the pipe parameters such
as pipe inside diameter (ID) and pipe outside diameter (OD).
Pipe Wall Thickness is an additional setup menu within the Pipe submenu. If
parameters for any 2 of the following 3 setup menus are entered, the flowmeter
calculates the remaining parameter automatically: Pipe OD (10), Pipe Wall
Thickness (11), Pipe ID (12).
Accuracy is directly affected by the square of an error in pipe dimensions; actual
measurements (not nominal) must be entered.
a. Select the PIPE OD menu (10). Figure 3.5-A (page 12) is displayed. Enter the value for the pipe
OD and press ENTER. Press the DOWN ARROW, and select Actual.
If you know the pipe circumference but not the OD, enter the circumference value
instead and press ENTER. Press the DOWN ARROW, and Figure 3.5-B (page 12)
is displayed. Select Circum. The flowmeter calculates the pipe OD automatically.
11
.....Quick setup configuration
2. PIPE setup menu continued:
FIGURES 3.5-A (LEFT) & 3.5-B (RIGHT)
b. Select the Pipe ID setup menu (12). Enter the pipe ID value, and press ENTER (Figure 3.5-C,
below).
c. Select the Pipe Material setup menu (13). Press the UP and DOWN ARROWS to scroll through
the available options (Figure 3.5-D, below).
Select OTHER if the material is not listed. You must then enter then pipe sound
speed (14) and pipe inside roughness (15).
3. If there is a liner:
a. Access the Liner Material setup menu (16), and Figure 3.5-E (below) is displayed. Press the UP
and DOWN ARROWS to scroll through the available options.
Select OTHER if the material is not listed. You must then enter the liner sound
speed (18) and liner inside roughness (19).
b. Access the Liner Thickness setup menu (17), and enter the thickness (Figure 3.5-F, below).
4. Access the Fluid T ype setup menu (20), and scroll through the available options using the UP and
DOWN ARROWS (Figure 3.5-G, below).
Select OTHER if the fluid type is not listed. You must then enter the fluid sound
speed (21) and fluid viscosity (22).
FIGURES 3.5-C THROUGH 3.5-G (LEFT TO RIGHT, TOP TO BOTTOM)
12
.....Quick setup configuration
5. Within the Transducer submenu:
a. Access the T ransducer Type setup menu (23). Currently, the only selection available is
ST ANDARD, which MUST be selected for all applications using clamp-on transducers, including
high temperature transducers (Figure 3.5-H, below).
b. Access the T ransducer Mounting setup menu (24), and select the desired mounting method
(Figure 3.5-I, below).
6. Access the T ransducer Spacing view-only menu (25). Note the required sp acing between transducers
(Figure 3.5-J, below).
7. Access the Flow Units setup menu (30) within the FLOW submenu. Use this setup menu to select the
flow rate units. V olumetric units are displayed first, followed by the associated time per unit s.
a. Select one of the available volumetric units (Figure 3.5-K, below).
b. Press the DOWN ARROW and the time per unit options are displayed. Select the desired option
(Figure 3.5-L, below).
FIGURES 3.5-H THROUGH 3.5-L (LEFT TO RIGHT, TOP TO BOTTOM)
8. Install the transducers on the pipe using the spacing provided by the flowmeter , and connect the
transducer cables to the flowmeter.
9. Access a primary display (00 through 04) to complete the configuration process.
If the flowmeter and transducers are properly installed and a steady flow is present, the flow and signal
strength readings should be relatively stable.
If any of the above setup parameters are changed, the flowmeter stop s measuring
flow until the new value is entered and a primary display is accessed to accept
the new value.
13
3.6 Primary Displays
The primary displays are for viewing only and cannot be configured. Primary displays include displayed
values for flow rate, totalizers, velocity , signal strength, or low signal cutof f (menus 00 through 04).
3.6.1 Flow/Net Totalizer (00)
The Flow/Net Totalizer (Figure 3.6-A, below) is the standard display used under normal operating condi-
tions. It displays the flow rate and net totalizer value. If the net totalizer is not currently enabled, the last net
totalized value is displayed.
3.6.2 Flow/Velocity (01)
The Flow/Velocity display (Figure 3.6-B, below) indicates the flow rate and fluid velocity. Velocity is
displayed in feet per second (FPS) if ENGLISH is selected as the measurement unit in Menu 42 and in
meters per second (MPS) if METRIC is selected.
3.6.3 Flow/Positive Totalizer (02)
This display indicates the flow rate and the totalized flow in the positive flow direction. If the positive
totalizer is not currently enabled, the last net totalized value is displayed (Figure 3.6-C, below).
3.6.4 Flow/Negative Totalizer (03)
This display indicates the flow rate and the totalized flow in the negative flow direction. If the negative
totalizer is not currently enabled, the last net totalized value is displayed (Figure 3.6-D, below).
3.6.5 Signal Strength/Low Signal Cutoff (04)
This display indicates the values for signal strength and low signal cutoff (Figure 3.6-E, below).
FIGURES 3.6-A THROUGH 3.6-E (LEFT TO RIGHT, TOP TO BOTTOM)
14
3.7 Additional Setup Menus Within the PIPE Submenu
*Not included in the Quick Setup configuration
Following are setup menus not included in the Quick Setup configuration detailed in Section 3.5 (page 11).
Setup menus are used primarily to enter configuration data or to view the flowmeter’s current
configuration settings.
1. Pipe Wall Thickness setup menu (1 1) (Figure 3.7-A, below)
2. Pipe Sound Speed setup menu (14): This menu can only be configured if you selected OTHER as the
pipe material in Menu 13. Enter the pipe sound speed. If you did not select OTHER as the pipe
material, this menu is available by the direct access method only and functions as a view-only display
to indicate the pipe sound speed as programmed in the flowmeter’s database (Figure 3.7-B, below).
3. Pipe Inside Roughness setup menu (15): This menu can only be configured if you selected OTHER
as the pipe material in Menu 13. Data on this parameter are available from the Cameron Hydraulic
Data Book published by Ingersoll-Rand. Enter the inside roughness of the pipe. If you did not select
OTHER as the pipe material, this menu is available by the direct access method only and functions as
a view-only display to indicate the pipe inside roughness as programmed in the flowmeter’s database
(Figure 3.7-C, below).
FIGURES 3.7-A THROUGH 3.7-C (LEFT TO RIGHT, TOP TO BOTTOM)
3.8 Additional Setup Menus Within the LINER Submenu
*Not included in the Quick Setup configuration
1. Liner Sound Speed setup menu (18): This menu can only be configured if you selected OTHER as the
liner material in Menu 16. Enter the liner sound speed. If you did not select OTHER as the liner
material, this menu is available by the direct access method only and functions as a view-only display
to indicate the liner’s sound speed as programmed in the flowmeter’s database (Figure 3.8-A,
page 16).
2. Liner Inside Roughness setup menu (19): This menu can only be configured if you selected OTHER
as the liner material in Menu 16. Enter the liner inside roughness. If you did not select OTHER as the
liner material, this menu is available by the direct access method only and functions as a view-only
display to indicate the inside roughness of the liner as programmed in the flowmeter’s database.
(Figure 3.8-B, page 16).
15
.....Additional setup menus within the LINER submenu
FIGURES 3.8-A (LEFT) & 3.8-B (RIGHT)
3.9 Additional Setup Menus Within the FLUID Submenu
*Not included in the Quick Setup configuration
1. Fluid Sound Speed setup menu (21): This menu can only be configured if you selected OTHER as the
fluid type in Menu 20. Enter the fluid sound speed. If you did not select OTHER as the fluid type, this
menu is available by the direct access method only and functions as a view-only display to indicate the
fluid sound speed as programmed in the flowmeter’s database (Figure 3.9-A, below).
2. Fluid Viscosity setup menu (22): This menu can only be configured if you selected OTHER as the fluid
type in Menu 20. Enter the fluid viscosity . If you did not select OTHER as the fluid type, this menu is
available by the direct access method only and functions as a view-only display to indicate the fluid
viscosity as programmed in the flowmeter’s database (Figure 3.9-B, below).
FIGURES 3.9-A (LEFT) & 3.9-B (RIGHT)
3.10 Additional Setup Menus Within the FLOW Submenu
*Not included in the Quick Setup configuration
1. Max Flow Range setup menu (31) and Min Flow Range setup menus (32): Use these menus to enter
the minimum and maximum flow values for setting the volumetric flow range. Setting the optimum flow
range generally improves the flowmeter’s response time (Figures 3.10-A and 3.10-B, page 17).
Whenever the pipe ID is changed, the flowmeter returns the volumetric flow range
to its default settings. The default settings are the minimum and maximum flows
for the new pipe ID that occur at +32 and -32 ft/s (+9.76 and -9.76 m/s).
2. Damping setup menu (33): Use this menu to enter the value for the damping coefficient, which
suppresses short-term fluctuations in the indicated flow rate. The displayed flow rate and the 4-20 mA
current loop output is a moving average of the last n seconds where n is the damping value.
Increasing the coefficient increases the response time to changes. The coefficient is adjustable from 1
to 99 seconds in 1-second increments. Keep damping at a minimum unless the flow rate fluctuates
wildly . If this is the case, increase the damping coefficient justenough to reduce the fluctuation to an
acceptable degree (Figure 3.10-C, page 17).
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.....Additional setup menus within the FLOW submenu
FIGURES 3.10-A THROUGH 3.10-C (LEFT TO RIGHT, TOP TO BOTTOM)
3. Low Flow Cutoff setup menu (34): When a zero flow condition occurs (for example, as the result of a
pump being shut off), internal sloshing, check valve leakage, and other fluid movement can prevent
the flowmeter from reading total zero. This phenomenon can result in totalizer errors. Minimize these
errors by entering a low flow cutoff, which drives the flowmeter to zero for flow rates at or below the
specified value. If the flow rate falls below the low flow cutoff value, the indicated flow rate is driven to
zero and the totalizers stop incrementing; this is the case regardless of flow direction (Figure 3.10-D,
below).
For example, if you enter a low flow cutoff of 0.1 ft/s (.03 m/s), the flowmeter is driven to zero for flow
rates less than 0.1 ft/s in the positive direction and greater than -0.1 ft/s in the negative direction
(Figure 3.10-E, below).
FIGURES 3.10-D (LEFT) & 3.10-E (RIGHT)
4. Low Signal Cutoff setup menu (35): Empty pipes or solids, bubbles, or voids in the flow stream may
cause temporary drops in signal strength and erroneous readings. Minimize the effect of these
dropouts bysetting a low signal cutoff, which drives the flowmeter to the loss-of-signal (LOS)
condition. The low signal cutoff should be set at the minimum acceptable signal amplitude.
a. Access the Low Signal Cutoff setup menu (Figure 3.10-F, page 18).
b. Enter the low signal cutoff and press ENTER.
The value for the low signal cutoff should usually be set at approximately onehalf of the value of the signal strength present under flow conditions. Typically,
signal strength is not significantly affected by flow rate.
c. Select one of the following (Figure 3.10-G, p age 18):
• ZERO: Drop the reading to zero during LOS condition
• HOLD: Hold the last valid reading during LOS condition for about 3 seconds
17
.....Additional setup menus within the FLOW submenu
FIGURES 3.10-F (LEFT) & 3.10-G (RIGHT)
3.11 Additional Setup Menus Within the TOTAL Submenu
*Not included in the Quick Setup configuration
1. T otalizer Unit s setup menu (36): The flow unit selected for the totalizer display may be different from
the flow unit selected for the flow rate display (Figure 3.1 1-A, below).
2. T otalizer Multiplier setup menu (37): The tot alizer value can be displayed with one of several multiplier
values. For example, 700 liters can be displayed as 700 if the selected multiplier value is X1, or it can
be displayed as 7 if selected multiplier value is X100 (Figure 3.1 1-B, below).
3. Net T ot alizer setup menu (38): Use this menu to enable or disable the net tot alizer. The net totalizer
provides the difference between the positive and negative flow values. For example, if there are 1000
gallons of flow in the negative direction and 3000 gallons of flow in the positive direction, the net
totalizer indicates 2000 gallons of net flow (Figure 3.1 1-C, below).
4. Positive T ot alizer setup menu (39): Use this menu to enable or disable the positive tot alizer. The
positive totalizer tracks the flow that moves in the positive direction, from upstream transducer to
downstream transducer. It is NOT af fected by flow in the opposite direction (Figure 3.11-D, below).
FIGURES 3.11-A THROUGH 3.11-D (LEFT TO RIGHT, TOP TO BOTTOM)
5. Negative T otalizer setup menu (40): Use this menu to enable or disable the negative tot alizer. The
negative totalizer tracks the flow that moves in the negative direction, from downstream transducer to
upstream transducer . It is NOT af fected by flow in the opposite direction (Figure 3.11-E, page 19).
6. T ot alizer Reset setup menu (41): Use this menu to reset one or all of the tot alizers (Figure 3.11-F ,
page 19).
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.....Additional setup menus within the TOTAL submenu
FIGURES 3.11-E (LEFT) & 3.11-F (RIGHT)
3.12 Additional Setup Menus Within the OPTIONS Submenu
*Not included in the Quick Setup configuration
The OPTIONS submenu contains setup menus for several miscellaneous functions.
1. Measurement Units setup menu (42): Use this menu to select ENGLISH (feet per second, FPS) or
METRIC (meters per second, MPS) measurement units (Figure 3.12-A, below).
2. Site Parameters setup menu (43): This menu saves the parameters for the pipe, liner , fluid,
transducer, and flow setup menus, allowing them to be recalled later for a specific measurement site.
Several sites are available and are numbered. The site number isdisplayed in Menu 43 in the lower
left corner of the screen and is followed by a colon. See Figure 3.12-B (below) for an example of a site
numbered 1.
As you enter the setup parameters in their respective menus during normal configuration, the same
parameters are saved simultaneously in the Site Parameters setup menu, in whichever site has the
asterisk displayed.
Access a different site to automatically enter that site’s stored parameters into the flowmeter for
measuring flow. To access a different site, press ENTER, scroll to the desired site, and press ENTER
again. To avoid overwriting stored parameters and losing old data, ensure that the desired site
is active prior to entering the new set of parameters.
FIGURES 3.12-A (LEFT) & 3.12-B (RIGHT)
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