Greyline Instruments TTFM 1.0 User manual

www.greyline.com
USER'S GUIDE
Installation & Operation
Instructions
Transit Time Flow Meter
Model TTFM 1.0
Manual Series A.3.4

Note: This page has been left blank intentionally.

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TTFM 1.0 Transit Time Flow Meter
INDEX
SENSOR INSTALLATION....................................................................................4
CONNECTIONS.....................................................................................................5
KEYPAD SYSTEM ................................................................................................8
CALIBRATION MENU .........................................................................................9
ICONS ...................................................................................................................10
MESSAGE.............................................................................................................11
STATUS................................................................................................................11
PASSWORD..........................................................................................................12
UNITS/MODE.......................................................................................................13
SET UP..................................................................................................................14
CALIBRATION ....................................................................................................16
RELAY PARAMETERS.......................................................................................17
SPECIAL FUNCTIONS........................................................................................18
SENSOR MOUNTING .........................................................................................20
ENCLOSURE INSTALLATION..........................................................................25
FIELD TROUBLESHOOTING............................................................................26
COMMON QUESTIONS AND ANSWERS........................................................29
APPLICATIONS HOTLINE.................................................................................31
PRODUCT RETURN PROCEDURE...................................................................32
APPENDIX A – OPTIONS...................................................................................35
DATA LOGGING.................................................................................................39
SPECIFICATIONS................................................................................................41
APPENDIX B - CONVERSION TABLE.............................................................42
PIPE CHARTS ......................................................................................................43
APPENDIX C – LIQUID SPEED OF SOUND....................................................47
IMPORTANT NOTE: This instrument is manufactured and calibrated to meet product specifications.
Please read this manual carefully before installation and operation. Any unauthorized repairs or
modifications may result in a suspension of the warranty.
If this product is not used as specified by the manufacturer, protection may be impaired.
Available in Adobe Acrobat pdf format

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TTFM 1.0 Transit Time Flow Meter
SENSOR INSTALLATION

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TTFM 1.0 Transit Time Flow Meter
CONNECTIONS:
POWER INPUT: The standard model requires AC power input between 100 to 240 VAC 50/60Hz. No
adjustments are necessary for voltages within this range. Connect L (Live) N (Neutral) and AC Ground.
Optional DC input model requires 9-32 VDC/9 Watts. Connect to + and - terminals.
Optional Thermostat and Heater modules are available rated for 115 VAC or 230 VAC.
IMPORTANT NOTE: To comply with CSA/UL electrical safety standards, AC power input and relay
connection wires must have conduit entry to the instrument enclosure. Installation requires a switch,
overcurrent fuse or circuit breaker in the building (in close proximity to the equipment) that is marked as
the disconnect switch.
Risk of electric shock. Loosen cover screw to access connections. Only qualified personnel
should access connections.
Note: Use of instrumentation over 40°C ambient requires special field wiring.
Note: User replaceable fuse is 2 Amp 250V (T2AL250V), located on the power supply.

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TTFM 1.0 Transit Time Flow Meter
CONNECTIONS

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TTFM 1.0 Transit Time Flow Meter
QUICK BENCH TEST:
In the TTFM Setup menu set parameters to perform a bench test:
- Set Fluid =Water
- Set Temperature = 20°C
- Set Pipe OD =0.15 inch
- Set Pipe Wall =0.06 inch
- Set Pipe material = ABS
- Set Lining = None
- Set Crossings = 4
- Press to view Signal Strength at bottom of menu.
Apply coupling compound to the face of sensors and press together as indicated in the illustration below.
The menu should indicate large Signal Strength display.
COUPLING
COMPOUND
~0.8”
20 mm

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TTFM 1.0 Transit Time Flow Meter
KEYPAD SYSTEM
The diagram on page 9 shows the TTFM 1.0 menu system. Arrows show the four directions to leave a
menu box. Pressing a corresponding keypad arrow will move to the next item in the direction shown.
Move the cursor (highlighted) under numerals and increase or decrease numerals with the and 
keys.
To store calibration values permanently (even through power interruptions), press the .

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TTFM 1.0 Transit Time Flow Meter
CALIBRATION MENU

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TTFM 1.0 Transit Time Flow Meter
ICONS

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TTFM 1.0 Transit Time Flow Meter
MAIN DISPLAY
The MAIN display shows the units selected from the Units/Mode menu, Flow or
Velocity rate being measured, TOTALIZER and RELAY states. The TTFM 1.0
will start-up with this display.
MESSAGE
ICON
Press from the MAIN display to view status of the data logger and
error/warning messages provided by the instrument. The Message Icon will
appear on the MAIN display if error messages are being generated by the
instrument. Press to return to the main display.
STATUS
Press from the MAIN display to view instrument status.
Velocity Displayed in ft/sec or m/sec.
Signal Strength Displays magnitude of signal being received by the ultrasonic
sensor.
Relays Energized relays will display as a white character on a
black background.

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TTFM 1.0 Transit Time Flow Meter
24 HR LOG (Data Logging option only)
Press from the MAIN display to view a formatted flow report from instruments
with a built-in data logger. Press to scroll down one day or repeatedly to scroll
to a specific date. Up to 365 days can be stored. Newest date will overwrite the
oldest. Press to return to the main display.
PASSWORD
The password (a number from 0000 to 9999) prevents unauthorized access to the
Calibration menu.
From the Main display press the key to get to Password. Factory default
password is 0000 and if it has not been changed press the to proceed to the
Menu Selections screen.
If a password is required, press to place the cursor under the first digit and or
to set the number, then to the second digit, etc. Press or to proceed to
the Menu Selections screen.
A new password can be stored by going to Special Functions/New Password.

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TTFM 1.0 Transit Time Flow Meter
UNITS/MODE
From Mode press the and then the or to select Flow or Velocity.
Flow mode displays the flow rate in engineering units (e.g. gpm, litres/sec, etc.)
Press the to store your selection then the to the next menu item and to
enter.
From Linear press the key and then the or to select your units of
measurement. Press the to store your selection.
Press the key to move the symbol to each subsequent menu item and the 
to save your selections.
Note: the volume selection "bbl" denotes U.S. oil barrel.
Press or to return to the Menu Selections screen.

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TTFM 1.0 Transit Time Flow Meter
SET UP
Sensor Select
Choose
SE16B
.
Fluid Vel
When Fluid =
Other
–
Enter the fluid velocity at 25C
from table or other reference in units of m/s
V/C(@25C)
When Fluid =
Other
–
Enter fluid velocity adjustment
factor over change in temperature in units of m/s per °C.
Fluid
Select fluid type.
Other will require additional information.
Fluid Temp
Enter average fluid temperature.
Pipe OD
Highlight the
digits and then

or

to change the
numbers and decimal point. Pipe OD should be entered
as the exact outside diameter of the pipe where the sensor
is mounted. Refer to the Pipe Charts Appendix in this
manual for outside diameter of common pipe types and
sizes.
Pipe Wall
Enter wall thickness.
Refer to the Pipe Charts Appendix in this manual for
thickness of common pipe materials and sizes.
Pipe Vel
When pipe =
Other
–
Enter pipe material speed of sound
(consult factory).
Pipe
Select pipe material.
Lining Thick
When Lining
–
Enter lining thickness
Lining Vel
When Lining =
Other
–
Enter speed of sound of lining
material.
Lining
Select Lining material
.
None represents no liner. Other will require additional
information.

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TTFM 1.0 Transit Time Flow Meter
Crossings 1 = Z mounting
2 = V mounting
4 = W mounting
Zero Tare
To suppress readings or fluctuations at zero flow. Set
Calibration/Damping to 5% and under no flow conditions
and full pipe select Yes to force readings to zero.
Sens Space
Displays the calculated sensor spacing
Velocity
Displays the measured velocity.
Signal Strength
Displays magnitude of signal being received by the
ultrasonic sensor.
Press

to return to Menu Selections.
NOTE:
Sensor
separation distance is automatically calculated by
the instrument and will be displayed in the Setup menu

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TTFM 1.0 Transit Time Flow Meter
CALIBRATION
Press to Calibration and to enter. Use or to position before each
menu item and to enter. When settings are completed press to store and
return to the Calibration menu.
20mA at
Press

then

or

to change the numbers and decimal
point. Use this menu to set the corresponding flow rate
that will be represented by 20mA analog output. If
maximum flow is unknown, enter an estimated flow rate
and observe actual flow to determine the correct
maximum value. Any velocity or flow rate up to +40
ft/sec (12.2 m/sec) may be selected.
4mA at
Press

or

to set the flow rate corresponding to 4mA
analog output. This setting may be left at zero flow (or
velocity or can be raised to any value less than the 20mA
setting, or lowered to any velocity or corresponding flow
rate down to -40 ft/sec (-12.2 m/sec).
Min Flow
Flow rates below this setting will be displayed as zero
flow.
Damping
Increase damping to stabilize readings under turbulent
flow conditions. Decrease for fast response to small
changes in flow. Damping is shown in percentage
(maximum is 99%). Factory default is 20%.
Press

to return to Menu Selections.

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TTFM 1.0 Transit Time Flow Meter
RELAY PARAMETERS
Relay
Press

and

or

to select a corresponding relay number (2
relays are standard, 4 additional are optional).
Function
Press

or

to select
Off
,
Pulse
or
Flow
.
Flow
Mode Select
Pump
,
Low Alarm
or
Hi Alarm
.
Pump mode provides separate On/Off settings where the relay
will energize at one flow rate and de-energize at another.
On Highlight the numerals and press or to set digits to
the required relay On set point.
Off set digits to the required Off set point.
Low Alarm mode relay will energize at a programmable flow
rate and remain energized with flow below the set point. When
flow rises above the set point, the relay will de-energize.
Hi Alarm mode relay will energize at a programmable flow
rate and remain energized with flow above the set point. When
flow falls below the set point, the relay will de-energize.
Pulse
P
ress

and set digits to the flow volume increment required
between relay pulses. Use this feature for remote samplers,
chlorinators or totalizers. Minimum time between pulses is
2.25 seconds and pulse duration is 350 milliseconds.
Return to Relay and change settings for each relay number.
Press to return to Menu Selections.

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TTFM 1.0 Transit Time Flow Meter
DATA LOGGING (OPTIONAL)
Refer to Options section of this manual.
SPECIAL FUNCTIONS
Language
Select
English
,
French
or
Spanish
Analog Out
Select 4
-
20mA or 0
-
5V mode for the analogue
output.
Backlight
Select
High
,
Medium
or
Low
for continuous
backlight.
Select
Key Hi/Lo
for high backlight for 1 minute
after a keypress and then Lo backlight until a key
is pressed again.
Select
Key High
,
Med
or
Low
for backlight for
1 minute after a keypress and then backlight off until
a key is pressed again.
Reset Totalizer
Press

and select
Yes
to erase and restart the
totalizer at zero.
Negative Totals
Select
Yes
to have reverse flow readings deducted
from the totalizer. Select No to totalize forward
flow only and ignore reverse flow.
Cal Constant
Factory set during calibration. (Refer to the
calibration certificate supplied with your instrument.)
Restore Defaults
Select
Yes
and press

to erase all user settings
and return the instrument to factory default settings.
New Password
Select any number from 0000 to 9999 and press

.
Default setting of 0000 will allow direct access to the
calibration menus. Setting of any password greater
than 0000 will require the password to be entered to
access the calibration menus.
Press

to return to
Menu Selections
.

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TTFM 1.0 Transit Time Flow Meter
SIMULATION
Exercises the 4-20mA output, digital display and control relays.
Simulate a Flow /Velocity reading. Press and then or to change the
simulated output. Press to begin simulation. The 4-20mA output and relay
states will be displayed on the screen below.
Press the to terminate simulation and return to the Menu Selections screen.

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TTFM 1.0 Transit Time Flow Meter
SENSOR MOUNTING LOCATION
The position of the sensor is one of the most important considerations for accurate Transit Time flow
measurement. The same location guidelines apply to Transit Time as most other types of flow meters.
Before permanently mounting a Transit Time sensor onsite testing is recommended to determine
optimum mounting position. Use the sensor coupling compound (supplied with each Greyline flow
meter, or petroleum gel, acoustic compound or electrocardiograph gel). Take several readings around the
axis of the pipe and then at several points upstream and downstream from the selected position,
checking for consistent readings. Avoid high or low reading areas. Mount the sensors where consistent
(average) readings were obtained or continue testing on another pipe section.
VERTICAL OR HORIZONTAL PIPE - Vertical pipe
runs generally provide evenly distributed flow. On
Horizontal pipes and liquids with high concentrations
of gas or solids, the sensors should be mounted on the
side (1 to 5 o’clock positions) to avoid concentrations
of gas at the top of the pipe, or solids at the bottom.
VELOCITY INCREASING DEVICES: Generally the sensors must be mounted away from flow
disturbances such as valves, pumps, orifice plates, venturis or pipe inlets and discharges which tend to
increase flow velocity. Velocity increasing devices often cause cavitation, or rapid release of gas
bubbles, and readings both up and downstream may be intermittent or inaccurate. As a guideline, mount
the sensor at least 20 diameters upstream or 30 diameters downstream from velocity increasing devices.
Required distance from a velocity increasing device will vary in applications depending on the flow
velocity and the characteristics of the liquid itself.
TURBULENCE INCREASING DEVICES: Elbows,
flanged connections and tees tend to introduce
desirable conditions of an evenly distributed flow
profile. Sensor mounting 6 pipe diameters upstream
and 10 diameters downstream from these disturbances
is generally optimum.
The sensors are designed to mount longitudinally on a straight section of pipe. Do not attempt to mount
it on bends, elbows or fittings.
VERTICAL PIPE USUALLY
HAS EVENLY DISTRIBUTED FLOW
1 TO 5 O'CLOCK POSITION
ON HORIZONTAL PIPES