lanry TF1100-CH Manual

TF1100-CH
Transit Time Ultrasonic Flow Meter
Handheld
Operation & Maintenance
Manual
REV 5/2017

TF1100-CH transit-time handheld flowmeter manual
CONTENTS
PART-1 INTRODUCTION ................................................................................................................................1
1.1 GENERAL.................................................................................................................................................. 1
1.2APPLICATIONVERSATILITY............................................................................................................... 1
1.3 USER SAFETY........................................................................................................................................... 1
1.4 DATAINTEGRITY.................................................................................................................................... 1
1.5 USER FRIENDLY...................................................................................................................................... 2
1.6 PRINCIPLE OFMEASUREMENT......................................................................................................... 2
1.7 PRODUCTIDENTIFICATION................................................................................................................ 3
1.8 SPECIFICATIONS .................................................................................................................................... 3
PART-2 START OPERATING INSTRUCTIONS............................................................................................4
2.1 POWER ON................................................................................................................................................ 4
2.2 KEYPAD ..................................................................................................................................................... 4
2.3 MENUWINDOWS .................................................................................................................................... 5
2.4 MENUWINDOWSARRANGEMENT.................................................................................................... 6
2.5 STEPSTO CONFIGURETHE PARAMETERS..................................................................................... 6
2.6TRANSDUCERS MOUNTINGLOCATING........................................................................................... 8
2.7TRANSDUCERS MOUNTING................................................................................................................. 8
2.7.2TRANSDUCER MOUNTINGMODE................................................................................................... 9
2.8 INSTALLATION CHECKUP ................................................................................................................. 10
2.8.1 SIGNALSTRENGTH........................................................................................................................... 10
2.8.2 SIGNALQUALITY(M90) ................................................................................................................... 10
2.8.3TOTALTRANSITTIMEAND DELTATIME.................................................................................... 11
2.8.4TIME RATIO BETWEENTHE MEASURED TOTALTRANSITTIMEANDTHE
CALCULATED TIME (M91)........................................................................................................................ 11
PART-3 HOW TO USE MENU OPERATION...............................................................................................12
3.1 HOWTO JUDGEWHETHERTHE INSTRUMENTWORKS PROPERLY .................................... 12
3.2 HOWTO JUDGETHELIQUID FLOWINGDIRECTION................................................................. 12
3.3 HOWTO CHANGETHE UNITS SYSTEMS........................................................................................ 12
3.4 HOWTO SELECTAREQUIRED FLOW RATE UNIT ...................................................................... 12
3.5 HOWTO USETHETOTALIZER MULTIPLIER................................................................................ 12
3.6 HOWTO OPEN OR SHUTTHE TOTALIZERS.................................................................................. 12
3.7 HOWTO RESETTHETOTALIZERS .................................................................................................. 13
3.8 HOWTO RESETTHE DEFAULTSETUPS.......................................................................................... 13
3.9 HOWTO USETHE DAMPING ............................................................................................................. 13
3.10 HOWTO USETHE ZERO-CUTOFFFUNCTION............................................................................ 13
3.11 HOWTO SETUPAZERO POINT........................................................................................................ 13
3.12 HOWTO GETASCALE FACTOR FOR CALIBRATION................................................................ 14
3.13 HOWTO USETHE OPERATION LOCKER..................................................................................... 14
3.14 HOWTO USETHE BUILT-IN DATAMEMORY............................................................................... 14
3.15 HOWTO USETHE FREQUENCYOUTPUT..................................................................................... 14

TF1100-CH transit-time handheld flowmeter manual
3.16 HOWTO PRODUCEANALARM SIGNAL....................................................................................... 16
3.17 HOWTO USETHE BUILT-IN BUZZER ............................................................................................ 16
3.18 HOWTO MODIFYTHE BUILT-IN CALENDAR.............................................................................. 16
3.19 HOWTOADJUSTTHE LCD CONTRAST........................................................................................ 16
3.20 HOWTO USETHE RS232 SERIALINTERFACE............................................................................. 16
3.21 HOWTO VIEWTHE DATETOTALIZERS....................................................................................... 16
3.22 HOWTO USETHE WORKINGTIMER ............................................................................................ 17
3.23 HOWTO USETHE MANUALTOTALIZER ..................................................................................... 17
3.24 HOWTO CHECKTHE ESNAND OTHERS...................................................................................... 17
3.25 HOWTO KNOWHOW LONGTHE BATTERYWILLLASTAND HOWTO CHARGETHE
BUILT-IN BATTERY..................................................................................................................................... 17
PART-4 MENU WINDOW DETAILS.............................................................................................................18
PART-5 TROUBLESHOOTING .....................................................................................................................24
5.1 POWER-ON ERROR DISPLAYSAND COUNTER-MEASURES..................................................... 24
5.2 ERROR CODEAND COUNTER-MEASURES.................................................................................... 24
5.3 OTHER PROBLEMSAND SOLUTIONS............................................................................................. 26
5.4 USEMENUWINDOWS FORTRANSDUCER MOUNTINGINSPECTION.................................... 26
PART-6 COMMUNICATION PROTOCOL..................................................................................................28
6. 1GENERAL ............................................................................................................................................... 28
6.2 INTERFACE PIN-OUTDEFINITION .................................................................................................. 28
6.3THE PROTOCOL.................................................................................................................................... 28
6.4 PROTOCOLPREFIX USAGE ............................................................................................................... 30
6.5 CODES FOR THE KEYPAD................................................................................................................... 31
PART-7 WARRANTYAND SERVICE...........................................................................................................32
7.1WARRANTY ............................................................................................................................................ 32
7.2 SERVICE.................................................................................................................................................. 32
APPENDIX 1 TRANSDUCER GUIDE RAIL INSTALLATION.............................................................33
APPENDIX 2 DATA LOGGER USEGE......................................................................................................36
APPENDIX 3 FUILD CHARACTERISTIC (SOUND SPEED)...............................................................38
1. FLUID PROPERTIES .................................................................................................................................. 38
2. WATE R SOUND SPEED ............................................................................................................................. 40
3. PIPE MATERIAL SOUND SPEED TABLE ................................................................................................ 40

TF1100-CH transit-time handheld flowmeter manual
1
PART-1 INTRODUCTION
1.1 GENERAL
Series TF1100-CH ultrasonic flow meters feature advanced Transit-Time measuring
technology, providing accurate and reliable flow rate and total flow display, The TF1100-CH
utilizes a non-invasive transducer which is hand-held or strapped to the outside of a pipe,
which will provide benefits of non-fouling operation and ease of installation.
TF1100-CH transit time flow meters utilize two transducers that function as both ultrasonic
transmitters and receivers.
The transducers are clamped on the outside of a closed pipe at a specific distance from each
other. The transducers can be mounted in V-mode where the sound transverses the pipe two
times, W-mode where the sound transverses the pipe four times, or in Z mode where the
transducers are mounted on opposite sides of the pipe and the sound crosses the pipe once. This
selection is based on pipe and liquid characteristics. The flow meter operates by alternately
transmitting and receiving a frequency modulated burst of sound energy between the two
transducers and measuring the time interval that it takes for sound to travel between the two
transducers. The difference in the time interval measured is directly related to the velocity of the
liquid in the pipe.
1.2 APPLICATION VERSATILITY
The TF1100-CH flow meter can be successfully applied on a wide range of metering
applications. The simple to program transmitter allows the standard product to be used on pipe
sizes ranging from 20mm -6000mm internal diameters. A variety of liquid applications can be
accommodated: ultra-pure liquids, potable water, chemicals, raw sewage, reclaimed water,
cooling water, river water, plant effluent, etc. Because the transducers are non-contacting and
have no moving parts, the flow meter is not affected by system pressure, fouling or wear. Standard
transducers are rated to 85°C.
1.3 USER SAFETY
The TF1100-CH employs modular construction and provides electrical safety for the operator.
The display face contains voltages no greater than 5Vdc. All user connections are made
through sealed bulk-head plugs located on the side of the TF1100-CH enclosure.
1.4 DATAINTEGRITY
Non-volatile flash memory retains all user-entered configuration values in memory for several
years, even if power is lost or the unit is turned off. Data Logger values are stored in flash memory in
the logger. Password protection is provided as part of the Security menu and prevents
inadvertent configuration changes or totalizer resets. A time-keeper is integrated in the flow
meter for the index of date totalizing and works as the time base of flow accumulation. It
keeps operating as long as the battery’s terminal voltage is over 1.5V. In case of battery
failure, the time-keeper will not keep running and it will lose proper time values. The user
must re-enter proper time values in case the battery becomes totally exhausted. An improper
time value affects no other functions but the date totalizer.

TF1100-CH transit-time handheld flowmeter manual
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1.5 USER FRIENDLY
The TF1100-CH features the ease of operation, high accuracy and outstanding reliability,
while the software provides a very user friendly interface and much more functions. It
employs a patent balanced lower voltage multi-pulse igniting circuit which increases the
anti-interference ability magnificently so that the flow meter will work properly even in
demanding industrial environments such as those with power frequency transmitter working
nearby. The signal receiving circuits feature self-adapting performance so as to ensure that
the user can easily operate the instrument without any adjustment. The built-in rechargeable
Ni-H battery can work continuously for more than 12 hours without recharge.
1.6 PRINCIPLE OF MEASUREMENT
The TF1100-CH ultrasonic flow meter is designed to measure the fluid velocity of liquid
within a closed conduit. The transducers are a non-contacting, clamp-on type, which will
provide benefits of non-fouling operation and easy installation.
The TF1100-CH transit time flow meter utilizes two transducers that function as both
ultrasonic transmitters and receivers. The transducers are clamped on the outside of a closed
pipe at a specific distance from each other. The transducers can be mounted in V-method
where the sound transverses the pipe twice, or W-method where the sound transverses the
pipe four times, or in Z-method where the transducers are mounted on opposite sides of the
pipe and the sound crosses the pipe once. This selection of the mounting method depends on
pipe and liquid characteristics. The flow meter operates by alternately transmitting and
receiving a frequency modulated burst of sound energy between the two transducers and
measuring the transit time that it takes for sound to travel between the two transducers. The
difference between the transit-time is directly and exactly related to the velocity of the liquid
in the pipe, as shown in Figure 1.
Where:
f
VLiquidvelocity
KConstant
dt Difference in time of flight
TL Average Transit Time
/fVKdtTL=
Figure 1

TF1100-CH transit-time handheld flowmeter manual
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1.7 PRODUCT IDENTIFICATION
Each set of the TF1100-CH Series flow meter has a unique product identification or ESN
written into the software that can only be modified with a special tool by the manufacturer. In
case of any hardware failure, please provide this number which is located on menu window
number M61 when contacting the manufacture.
1.8 SPECIFICATIONS
Transmitter:
Measurement principle Ultrasonic transit-time difference correlation principle
Flow velocity range 0.01 to 12 m/s, bi-directional
Resolution 0.25mm/s
Repeatability 0.2% of reading
Accuracy ±1.0% of reading at rates >0.3 m/s);±0.003 m/s of reading at
rates<0.3 m/s
Response time 0.5s
Sensitivity 0.003m/s
Damping of displayed value 0-99s(selectable by user)
Liquid Types Supported both clean and somewhat dirty liquids with turbidity <10000 ppm
Power Supply AC: 85-265V Up to 14 h with fully charged internal batteries
Enclosure type Handheld
Degree of protection IP65 according to EN60529
Operating temperature -20℃to +60℃
Housing material ABS
Display 4 line×16 English letters LCD graphic display, backlit
Units User Configured (English and Metric)
Rate Rate and Velocity Display
Totalized gallons, ft³, barrels, lbs, liters, m³,kg
Communication OCT, RS232,Data logger
Security Keypad lockout, system lockout
Size Transmitter:212*100*36mm Case:140*320*80mm
Weight 0.5kg
Transducer:
Degree of protection IP65 according to EN60529.(IP67 or IP68 Upon request)
Suited Liquid Temperature Std. Temp.: -35℃~85℃for short periods up to 120℃
High Temp.: -35℃~200℃for short periods up to 250℃
Pipe diameter range 20-50mm for type S, 40-1000mm for type M, 1000-6000mm for
type L
Transducer Size Type S 52(h)*28(w)*28(d)mm Type M 60(h)*34(w)*32(d)mm
Type L 80(h)*40(w)*42(d)mm
Material of transducer Aluminum for standard temp. sensor, and peek for high temp.
sensor
Cable Length Std: 5m

TF1100-CH transit-time handheld flowmeter manual
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PART-2 START OPERATING INSTRUCTIONS
2.1 POWER ON
Press the ON key to switch on the instrument and press the OFF to turn off the
power.
Once the flow meter is switched on, it will run a self diagnostic program, checking first the
hardware and then the software integrity. If there is any abnormality, corresponding error
messages will display.
Generally, there should be no display of error messages, and the flow meter will go to the
most commonly used Menu Window Number 01 (short for M01) to display the Velocity,
Flow Rate, Positive Totalizer, Signal Strength and Signal Quality, based on the pipe
parameters configured last time by the user or by the initial program.
The flow measurement program always operates in the background of the user interface. This
means the flow measurement will keep on running regardless of any user menu window
browsing or viewing. Only when the user enters new pipe parameters will the flow meter
change measurement to the new parameter changes.
When new pipe parameters have been entered or when the power has been just switched on,
the flow meter will enter an adjusting mode to make the signals magnified with proper
amplification. By this step, the flow meter is going to find the best threshold of receiving
signal. The user will see the progress by the number 1, 2, or 3, which are indicated on the
right lower corner of the LCD display.
When the transducers have been adjusted on the pipe by the user, the flow meter will
re-adjust the signal automatically.
Any user-entered configuration value will be retained into the NVRAM of the flow meter,
until it is modified by the user.
2.2 KEYPAD
The keypad for the operation of the flow meter has 16+2 keys, as shown by the right via
Keys 0 ~ 9 and .are keys to enter numbers, Key ∧/+ is the going UP key, when
the user wants to go to the upper menu window. It also works as + key when
entering numbers
Key ∨/- is the going DOWN key, when the user wants
to go down-sided menu window. It also works as the
‘–‘ key when entering numbers.
Key ◄is backspace key, when the user wants
go left or wants backspace the left character that

TF1100-CH transit-time handheld flowmeter manual
5
is located to the left of the cursor.
Key ENT is the ENTER key for any inputting or selections.
Key MENU is the key for the direct menu window jump over. Whenever the user wants
to proceed to a certain menu window, the user can press this key followed by 2-digit
numbers.
The MENU key is shortened as the ‘M’ key afterward when referring to the menu windows.
The ON key is for the power on.
The OFF key is for the power off.
2.3 MENU WINDOWS
The user interface of this flow meter comprises about 100 different menu windows that are
numbered by M00, M01, M02 … M94 etc.
There are 2 methods to enter certain menu window:
(1) Direct going/entering. The user can press the MENU key followed by two-digit number
keys. For example, the menu window M20 is for the entering of Fluid Type. The display will
go to the M20 menu window after the user presses MENU 2 0 .
(2) Pressing ∧/+ and ∨/- keys. Each time of the ∧/+ key pressing will proceed to the
lower-numbered menu window. For example, if the current window is on M12, the display
will go to the number M11 window after pressing the ∧/+ key or M13 after pressing the ∨
/- key.
There are three different types of menu windows:
(1) Menu windows for number entering, like M11 for the entering of pipe outer diameter.
(2) Menu windows for option selection/selecting options, like M14 for the selection of pipe
materials.
(3) Displaying windows only, like M00 to display Velocity, Flow Rate etc.
For number entering windows, the user can directly press the starting digit key when the user
is going to modify the value. For example, when the current window is on M11, and the user
is going to enter 154.6 as the pipe outer diameter, the user can get the numbers entered by
pressing the following serial keys: 1 5 4 . 6 ENT.
For the option selection windows, the user should first press the ENT key to a selection
modification mode and then select the relevant options by pressing the ∧/+ and ∨/- keys
or the digit keys to select the option with a number antecedent to the option. In the end, the
ENT key must be pressed to make the selection. For example, with menu window M14 for
the selection of pipe material selection, (the MENU 1 4 should be pressed first to

TF1100-CH transit-time handheld flowmeter manual
6
enter this menu window if the current menu window is on a different window. The pipe
material is stainless steel which has a number “1” antecedent to “stainless steel” on the
display, the user should first press the ENT key to enter into a selection modification mode,
then either make the selection by pressing the ∧/+ and ∨/- keys to make the cursor on the
line that displays “1. Stainless Steel”, or make the selection by pressing the 1 key directly.
Generally, the ENT key must be pressed to enter a modification mode. If the “Locked M47
Open’ message is indicated on the lowest line of the LCD display, it means the
modification operations is locked out. In such cases, the user should go to M47 to have the
instrument unlocked first before any further modification can be made.
2.4 MENU WINDOWSARRANGEMENT
M00~M09 windows for the display of the flow rate, velocity, date time, totalizers, battery
voltage and estimated working hours for the battery.
M10~M29 windows for entering the pipe parameter.
M30~M38 windows for flow rate unit selections and totalizer unit selections.
M40~M49 windows for response time, zeroing, calibration and modification password
setup.
M50~M53 windows for the built-in logger
M60-M78 windows for time-keeper initialization, version and ESN information viewing
and alarms.
M82 window for viewing date totalizer.
M90~M94 are diagnostic windows for a more accurate measurement.
M+0~M+8 are windows for some additional functions, including a scientific calculator,
viewer on records such as total working hours, turn-on and turn-off times, dates
and times when the flow meter has been turned on or turned off.
Other menu windows such as M88 have no functions, or functions were cancelled because
they are not applied to this version of the software.
The major reason why the menu windows are arranged in this way is that the software
programmer hopes that the menu window arrangement for this version has the most
compatibility with the previous versions of the TF1100-CH dedicated model software. This
will make it easier for the former version users with this flow meter series.
2.5 STEPS TO CONFIGURE THE PARAMETERS
The following parameters need to be configured for a proper measurement:

TF1100-CH transit-time handheld flowmeter manual
7
(1) Pipe outer diameter (O.D.)
(2) Pipe wall thickness
(3) Pipe materials (for non-standard pipe materials*, the sound speed for the material must be
configured too)
*Standard pipe materials and standard liquids refer to those with the sound parameters
that have already been programmed into software of the flow meter; therefore there is no
need to configure them.
(4) Liner material and its sound speed and thickness, if there is any liner.
(5) Liquid type (for non-standard liquids, the sound speed of the liquid is also needed)
(6) Transducer type adapted to the flow meter. Generally the Standard M1 or the Frame
M-sized transducers will be the selected option.
(7) Transducer mounting methods (the V-method or Z-method is the common option)
(8) Check up the Space displayed on M25 and install the transducers accordingly.
For standard pipe materials and standard liquids, the following detailed step-by-step setup is
recommended.
(1) Press keys MENU 1 1 to enter M11 window to input the digits for the pipe outer
diameter, and then press ENT key.
(2) Press key ∨/- to enter M12 window to input the digits for the wall thickness and then
press ENT key.
(3) Press key ∨/- to enter M14 window, and press ENT key to enter the pipe material.
Use keys ∧/+ and ∨/- to scroll up and down to the intended pipe material, and then
press ENT key. If you select “Other”, you must enter Menu15, pipe sound speed.
(4) Press key ∨/- to enter M16 window, press ENT key to enter the option selection
mode, use keys ∧/+ and ∨/- to scroll up and down to the liner material, and then
press ENT key. Select “No Liner”, if there is no liner, If you select “Other”, you must
enter Menu17, liner sound speed.
(5) Enter “Liner Thickness” in Menu18.
(5) Press key ∨/- to enter M20 window, press ENT key to enter Fluid Type, use keys
∧/+ and ∨/- to scroll up and down to the proper liquid, and then press ENT key.
If you select “Other”, you must enter Menu21, Fluid sound speed and Menu 22, Fluid
Viscosity
(6) Press key ∨/- to enter M23 window, press ENT key to enter the Transducer Type,
use keys ∧/+ and ∨/- to scroll up and down to the proper Transducer Type (Standard
S, M, L) you selected, and then press ENT key. Plug Type C and B are for Insertion
transducer, no matter with Clamp-on transducers.
(7) Press key ∨/- to enter M24 window to select Transducer Mounting mode, and then
press ENT key. Refer to 2.7.2 Transducer Mounting Mode for detail.
(8) When above steps finished, Menu 25 will display transducer install spacing. Refer to
2.7.1 for detail.

TF1100-CH transit-time handheld flowmeter manual
8
(9) Enter Menu 90 and 91, to adjust the transducer spacing for good run status. Try to
move one transducer, let this value closer to 100.0%. Meter display will be more
accurate.
Please read Part 4, Menu Windows details, it will help you have a good operation.
The first-time users may need some time to get familiar with the operation. However, the
user friendly interface of the instrument makes the operation quite easy and simple. Before
long, the user will configure the instrument with very little key pressing, since the interface
allows the user to go to the desired operation directly without any extra steps.
The following tip will facilitate the operation of this instrument.
(1) When the window display is between M00 to M09, press MENU key, then press a
number key x , the user will go directly to the M0x window. For example, if the current
window displays M01, press 7 and the user will go to M07.
(2) When the window display is under M00 to M09, press the ENTER key and the user will
go to Menu90; Menu 90 display the meter run status, press ENTER key to return. Press
the dot key to go to M11
2.6 TRANSDUCERS MOUNTING LOCATING
The first step in the installation process is the selection of an optimum location in order to
obtain a more accurate measurement. For this to be completed effectively, a basic knowledge
about the pipe straight running would be advisable. An optimum location would be defined
as a straight pipe length full of liquid that is to be measured. The piping can be in vertical or
horizontal position. The following table shows examples of optimum locations.
Principles to selection of an optimum location
(1) Install the transducers on a longer length of the straight pipe. The longer the better, and
make sure that the pipe is completely full of liquid.
(2) Make sure that the temperature on the location does not exceed the range for the
transducers. Generally speaking, the closer to the room temperature, the better.
(3) Take the pipe fouling into consideration. Select a straight length of a relatively newer
pipe. If the condition is not satisfying, consider the fouling thickness as part of the liner
for a better result.
(4) Some pipes have a kind of plastic liner, and between the outer pipe and the liner there may
be a certain thickness difference that will prevent the ultrasonic waves from direct
traveling. Such conditions will make the measurement very difficult. Whenever possible,
try to avoid this kind of pipes. If impossible, try our plug-in transducers that are installed
permanently on the pipe by drilling holes on the pipe while liquid is running inside.
2.7 TRANSDUCERS MOUNTING
The transducers used by the TF1100-CH series ultrasonic flow meter are made of
piezoelectric crystals both for transmitting and receiving ultrasonic signals through the wall
of liquid piping system. The measurement is realized by measuring the traveling time
difference of the ultrasonic signals. Since the difference is very small, the spacing and the

TF1100-CH transit-time handheld flowmeter manual
9
alignment of the transducers are critical factors to the accuracy of the measurement and the
performance of the system. Meticulous care should be taken for the installation of the
transducers.
Steps to the installation of the transducers
(1) Locate an optimum position where the straight pipe length is sufficient, and where pipes
are in a favorable condition, e.g., newer pipes with no rust and ease of operation.
(2) Clean any dust and rust. For a better result, polishing the pipe with a sander is strongly
recommended.
(3) Apply adequate coupler to the spot where the transducers are to be installed and leave no
gap between the pipe surface and the transducers.
Take care to avoid any sand or dust particles left between the pipe outer surface and the
transducers.
To avoid gas bubbles inside the upper part of the pipe, the transducers should be installed
horizontally by the side of the pipe.
2.7.2 TRANSDUCER MOUNTING MODE
Transducer Mounting Modes
V method
V-Mount is the most widely used mode for daily measurement with pipe inner diameters
ranging from 20 millimeter to 300 millimeter. It is also called standard mode or method. But
if the meter displays error code or low signal strength and bad signal quality, for instance,
some old pipe etc., user should select Z-Mount.
Z method

TF1100-CH transit-time handheld flowmeter manual
10
Z-Mount is commonly used when the pipe diameter is between 300 millimeters and 4500
mm.
W method
W-Mount is usually used on plastic pipes with a diameter from 10 mm to 50 mm.
2.8 INSTALLATION CHECKUP
Through the checkup of the installation, one can: check the receiving signal strength, the
signal quality Q value, the traveling time difference of the signals, the estimated liquid speed,
the measured traveling time of the signals and the calculated traveling time ratio. Therefore,
optimum measurement result and longer running time of the instrument can be achieved.
2.8.1 SIGNALSTRENGTH
Signal strength indicates the amplitude of receiving ultrasonic signals by a 3-digit number.
[00.0] means there is no signal detected and [99.9] refers to the maximum signal strength that
can be received.
Although the instrument works well if the signal strength ranges from 50.0 to 99.9, stronger
signal strength should be pursued, because a stronger signal means a better result. The
following methods are recommended to obtain stronger signals:
(1) Relocate a more favorable location, if the current location is not good enough for a stable
and reliable flow reading, or if the signal strength is lower than 700.
(2) Try to polish the outer surface of the pipe, and apply more coupler to increase the signal
strength.
(3) Adjust the transducers both vertically and horizontally while checking the varying signal
strength, stop at the highest position, and then check the transducers spacing to make
sure the transducers spacing is the same as what the M25 shows.
2.8.2 SIGNAL QUALITY (M90)
Signal quality is indicated as the Q value in the instrument. A higher Q value would mean a
higher Signal and Noise Ratio (short for SNR), and accordingly a higher degree of accuracy
would be achieved. Under normal pipe condition, the Q value is in the range 60-99, the
higher the better.
Causes for a lower Q value could be:

TF1100-CH transit-time handheld flowmeter manual
11
(1) Interference of other instruments and devices such as a powerful converter working
nearby. Try to relocate the flow meter to a new place where the interference can be
reduced.
(2) Bad sonic coupling for the transducers with the pipe. Try to apply more coupler or clean
the surface, etc.
(3) Pipes are difficult to be measured. Relocation is recommended.
2.8.3 TOTALTRANSIT TIME AND DELTATIME
The numbers displayed on menu window M93 are called total transit time and delta time
respectively. They are the primitive data for the instrument to calculate the flow rate inside
the pipe. So the flow rate indication will vary accordingly with the total time and delta time.
The total transit time should remain stable or vary little.
If the delta time fluctuates higher than 20%, it means there are certain kinds of problems with
the transducer installation.
2.8.4 TIME RATIO BETWEEN THE MEASURED TOTAL TRANSIT
TIME AND THE CALCULATED TIME (M91)
This ratio would be used to check the transducer installation. If the pipe parameters are
entered correctly and the transducers are installed properly, the value for this ratio (M91)
should be in the range of 100±3. If this range is exceeded, the user should check:
(1) If the pipe parameters are correctly entered.
(2) If the actual spacing of the transducers is right and the same as what the window M25
shows.
(3) If the transducers are installed properly in the right directions.
(4) If the mounting location is good and if the pipe has changed shape or if there is too much
fouling inside the pipes
(5) Other poor conditions

TF1100-CH transit-time handheld flowmeter manual
12
PART-3 HOW TO USE MENU OPERATION
3.1 HOW TO JUDGE WHETHER THE INSTRUMENT WORKS
PROPERLY
Generally speaking, when ‘R’ is displayed in the lowest right corner of LCD display, the
instrument is working properly.
If an ‘H’ flashes on that place, there could be poor signal received. Please refer to the
chapters on diagnosis.
If an ‘I’ is displayed, it means that there is no signal detected.
If a ‘J’ is displayed, it means that the hardware of this instrument could be out of order. Refer
to the chapter on diagnosis.
3.2 HOW TO JUDGE THE LIQUID FLOWING DIRECTION
(1) Make sure that the instrument works properly
(2) Check the flow rate for the indication. If the displayed value is POSITIVE, the direction
of the flow will be from the RED transducers to the BLACK transducers; if the displayed
value is NEGATIVE, the direction will be from the BLACK transducers to the RED
transducers.
3.3 HOW TO CHANGE THE UNITS SYSTEMS
Use menu window M30 for the selection of unit system in English or Metric system.
3.4 HOW TO SELECTA REQUIRED FLOW RATE UNIT
Use menu window M31 to select the flow unit first and then the timing unit.
3.5 HOW TO USE THE TOTALIZER MULTIPLIER
Use window M33 to select a proper totalizer. Make sure that the totalizer pulse is
appropriately speeded. It should not be too fast and neither too slow. A speed of producing a
pulse in several seconds or minutes is preferable.
If the totalizer multiplier is too small, there can be a loss of accumulation pulse because the
output device can output only one pulse in a measurement period (500milliseconds)
If the totalizer multiplier is too large, the output pulse will be too fewer for the devices that
are connected with the instrument for a quicker response.
3.6 HOW TO OPEN OR SHUT THE TOTALIZERS
Use M34, M35 and M36 to turn on or turn off the NET, POS, or NEG totalizer respectively.

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3.7 HOW TO RESET THE TOTALIZERS
Use M37 to reset the proper totalizer.
3.8 HOW TO RESET THE DEFAULT SETUPS
Use M37, when the ‘selection’ message is displayed. Press the dot key first and the message
‘Master Erase’ will display, then press the backspace key ◄
The master erase step will erase all the parameters entered by the user and setup the
instrument with default values.
3.9 HOW TO USE THE DAMPING
The damping acts as a filter for a stable reading. If ‘0’ is entered in window M40, that means
there is no damping. A bigger number brings a more stable effect. But bigger damping
numbers will prevent the instrument from acting quickly.
Numbers 0 to 10 are commonly used for the damping value.
3.10 HOW TO USE THE ZERO-CUTOFF FUNCTION
The number displayed in window M41 is called the low-cutoff value. The flow meter will
replace these flow rate values that are absolutely less than the low-cutoff value with ‘0’. This
means the flow meter will avoid any invalid accumulation when the actual flow is below the
zero-cutoff value.
The low-cutoff value does not affect the flow measurement when the actual flow is
absolutely greater than the low-cutoff value.
3.11 HOW TO SETUPA ZERO POINT
It is necessary to establish the true zero flow condition and program that set point into the
instrument. If the zero set point is not at true zero flow, a measurement difference may occur.
Because every flow meter installation is slightly different and sound waves can travel in
slightly different ways through these various installations, a provision is made in this entry to
establish “ True Zero” flow – SETUP ZERO.
There exists a ‘Zero Point’ with certain installation which means the flow meter will
display a non-zero value when the flow is absolutely stopped. In this case, setting a
zero point with the function in window M42 will bring a more accurate measurement
result. When do a calibration test, it is also very important.
Make sure that the pipe is full of liquid and the flow is absolutely stopped - securely close
any valves and allow time for any settling to occur. Then run the function in window M42
by press the MENU 4 2 keys, then press ENT key and wait until the counter readings
displayed in the lower right corner of the screen goes to “00”; thus, the zero set is

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completed and the instrument indicates the results automatically through Window No.01.
Repeat zero set calibration if it still needs to be minimized, i.e. the velocity reading is still
high.
3.12 HOW TO GETASCALE FACTOR FOR CALIBRATION
The scale factor is the ratio between the ‘actual flow rate’ and the indicated value by the flow
meter.
The scale factor can be determined by calibration with flow calibration equipment.
3.13 HOW TO USE THE OPERATION LOCKER
The system locker provides a means of preventing inadvertent configuration changes or
totalizer resets.
When the system is locked, menu window browsing can be done without affecting any change,
but any modifications are prohibited.
The system can be locked without a password or with a one 1 to 4 digit password. With a
no-password locking, directly press the ENT key when the password input prompt displays.
If the password is forgotten, please contact the factory.
3.14 HOW TO USE THE BUILT-IN DATAMEMORY
The data memory has a space of 24K bytes of memory, which will hold about 2000 lines of
data.
Use M50 to turn on the data memory and for the selection for the items that is going to be
logged.
Use M51 for the times when the logging begins and at how long an interval sustains and how
long the data logging will last.
Use M52 for the direction of logging data. The default setting will permit the logging data to
be stored in the data memory buffer.
Logging data can be redirected to the RS-232C interface without being stored into the data
memory buffer. Dumping the logging data through the RS-232C interface and the clearing of
the buffer can be operated with a function in window M52.
Use M53 to view the data in the data memory buffer.
3.15 HOW TO USE THE FREQUENCY OUTPUT
Only For Flow Rate Output.
There is a Frequency Output in all series TF1100 flow meters. This frequency output signal,

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15
which represents the flow rate, is intended to connect with other instruments.
The Frequency Output is totally user-configurable. Generally, four parameters should be
configured for the setups.
Enter the lower flow rate value in window M68 and the higher flow rate value in window
M69.Enter the frequency range in window M67.
For example, assume that the flow rate varies in a range 0m3/h to 2000m3/h, and an output
signal is at a maximum frequency of 1000Hz, the minimum of 200Hz is going to be required
for other instrumentation. The user should enter 0 in M68 and 2000 in M69, and enter 200
and 1000 in window M67.
Please note that the user has to make the selection with OCT (Open Collect Transistor)
output setups in window M78 by selecting the 13th option reading like ‘FO output’ to direct
the frequency output to the OCT OUTPUT hardware device.
The OCT output shares pins with the RS-232C interface, and the terminal is at Pin 1 for OCT
+ and the ground is at Pin 5.
A, B is DC power supply based on pulse receiver voltage, 5-24V is allowable. C,D is pulse
input for receiver. Select a resistor that is a maximum of 10% of the input impedance of the
receiving device, but do not exceed 10k ohms.
OCT: Black+ ; Yellow-

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3.16 HOW TO PRODUCE AN ALARM SIGNAL
There are 2 types of hardware alarm signals that are available with this instrument. One is the
Buzzer, and the other is the OCT output.
Both for the Buzzer and OCT output the triggering sources of the event include the
following:
(1) Alarms on when there is no receiving signal
(2) Alarms on when there is poor signal received.
(3) Alarms on when the flow meter is not in normal measurement modes.
(4) Alarms on reverse flow.
(5) Alarms on the overflow of the Frequency Output
(6) Alarms on when the flow is out of a designated range set by the user.
There are two out-of-normal-range alarms in this instrument. They are called #1 Alarm and
#2 Alarm. The flow range can be user-configurable through M73, M74, M75, M76.
For example, assume that the Buzzer should start beeping when the flow rate is less than
300m3/h and greater than 2000m3/h, the following steps for setups would be recommended.
(1) Enter 300 under M73 for #1 alarm low flow rate
(2) Enter 2000 under M74 for #1 alarm high flow rate
(3) Select the item reading like ‘6. Alarm #1’ under M77.
3.17 HOW TO USE THE BUILT-IN BUZZER
The built-in buzzer is user-configurable. It can be used as an alarm. Use M77 for setups.
3.18 HOW TO MODIFY THE BUILT-IN CALENDAR
No modification on the built-in calendar will be needed in most cases. The calendar runs on
insignificant amount of power supply. Modification will be required only in such cases as
when the battery is totally consumed, or when the changing of the battery takes a long time.
Press the ENT key under M61 for Modification. Use the dot key to skip over these digits that
need no modification.
3.19 HOW TO ADJUST THE LCD CONTRAST
Use M70 to the LCD contrast. The adjusted result will be stored in the EEPROM so that the
MASTER ERASE will make no effect on the contrast.
3.20 HOW TO USE THE RS232 SERIALINTERFACE
Use M62 for the setup of the RS-232C serial interface.
3.21 HOW TO VIEW THE DATE TOTALIZERS
Use M82 to view the date totalizers that are comprised of a daily totalizer, a monthly totalizer
and a yearly totalizer.

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3.22 HOW TO USE THE WORKING TIMER
Use the working timer to check the time that has passed with a certain kind of operation. For
example, use it as a timer to show how long a fully-charged battery will last.
Under M72, press ENT key and then select YES to reset the timer.
3.23 HOW TO USE THE MANUALTOTALIZER
Use M28 for the manual totalizer. Press ENT key to start and stop the totalizer.
3.24 HOW TO CHECK THE ESNAND OTHERS
Every set of the TF1100-CH series flow meter utilizes a unique ESN to identify the meter.
The ESN is an 8-digit number that provides the information of version and manufacturing
date. The user can also employ the ESN for instrumentation management. The ESN is
displayed in window M61.
Other details about the instrument are the total working hours displayed in window M+1, and
the total power-on times displayed in window M+4.
3.25 HOW TO KNOW HOW LONG THE BATTERY WILLLAST AND
HOW TO CHARGE THE BUILT-IN BATTERY
Use M07 to check how long the battery will last. The instrument can operate either from the
built-in Ni-H rechargeable battery, which will last over 10 hours of continuous operation
when fully recharged, or from an external AC/power supply from the battery charger.
The battery charging circuits employ a scheme of constant-current and constant-voltage. It
has a characteristic of fast charging at the beginning and very slow charging when the battery
approaches to full recharge. Generally, when the green LED starts coming on, the battery
would be nearly 95% recharged and when the red LED is off, the battery would be 98%
recharged.
Since the charging current becomes tapered when the battery recharge is nearly completed,
i.e. the charging current becomes smaller and smaller, therefore, there should be no
over-recharging problem. That means the charging progress can last very long.
When fully recharged, the terminal voltage reaches around 4.25V. The terminal voltage is
displayed on window M07. When the battery is nearly consumed, the battery voltage drops to
below 3V. The user can obtain an approximate battery working time from the battery voltage.
A software battery working time estimator is integrated in this instrument based on the
terminal voltage. Please note that the estimator may have relatively bigger errors in the
estimated working time, especially when the voltage is in the range of around 3.70 to -3.90
volt.