Tek-Trol TEK-CLAMP 1200A-100H User manual

Technology Solutions
TLAMP 1200A-100H
EK-C
Instruction Manual
Handheld Ultrasonic Flow Meter
Document Number: IM-1200A-100H
www.tek-trol.com

© COPYRIGHT Tek-Trol LLC 2020
NOTICE
Read this manual before working with the product. For personal and system safety, and for optimum
product performance, make sure you thoroughly understand the contents before installing, using, or
maintaining this product.
For technical assistance, contact
Customer Support
796 Tek-Drive
Crystal Lake, IL 60014
USA
Tel: [phone]
www.tek-trol.com
No part of this publication may be copied or distributed, transmitted, transcribed, stored in a
retrieval system, or translated into any human or computer language, in any form or by any means,
electronic, mechanical, manual, or otherwise, or disclosed to third parties without the express
written permission. The information contained in this manual is subject to change without notice.

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Table of Contents
1Safety Instructions ........................................................................................................... 2
1.1 Intended Use ....................................................................................................................... 2
1.2 Safety Instructions from the Manufacturer .......................................................................... 2
1.2.1 Disclaimer................................................................................................................................ 2
1.2.2 Product Liability and Warranty ............................................................................................... 2
1.2.3 Information Concerning the Documentation.......................................................................... 2
1.2.4 Safety Precautions................................................................................................................... 2
1.2.5 Packaging, Transportation and Storage .................................................................................. 3
1.2.5.1 Packaging The original package consists of..................................................................................3
1.2.6 Transportation......................................................................................................................... 4
2Product Description ......................................................................................................... 5
2.1 Introduction ........................................................................................................................ 5
2.2 Measuring Principle............................................................................................................. 5
2.3 Specifications ...................................................................................................................... 6
2.4 Dimensional Drawings ......................................................................................................... 7
3Installation....................................................................................................................... 8
3.1 Correct Mounting Point ....................................................................................................... 8
3.1.1 Clamp on Transducer: ............................................................................................................. 8
3.1.2 Clamp on mounting bracket transducer ................................................................................. 9
3.2 Requirements for Measuring Flow meter Accuracy.............................................................. 9
3.3 Installation Condition ........................................................................................................ 10
3.3.1 V-method Installation: .......................................................................................................... 10
3.3.2 Z-method Installation............................................................................................................ 10
3.3.3 W-method Installation .......................................................................................................... 10
4Electrical Installations .................................................................................................... 11
4.1 Signal Strength .................................................................................................................. 12
4.1.1 Signal Quality......................................................................................................................... 12
4.2 Transmitter Connections ................................................................................................... 13
4.2.1 Basic Circuit of the Transmitter............................................................................................. 13
4.3 Digital Output.................................................................................................................... 13
4.3.1 The Connection of Digital Output ......................................................................................... 13
4.4 Operation .......................................................................................................................... 13
4.4.1 Keys’ Function ....................................................................................................................... 13
4.4.2 Menu ..................................................................................................................................... 14
4.4.3 Menu Window Details........................................................................................................... 16
5Troubleshooting............................................................................................................. 21
5.1 No Display ......................................................................................................................... 21
5.2 Exciting Alarm ................................................................................................................... 21
5.3 Empty Pipe Alarm .............................................................................................................. 21
5.4 Measure Flow Disallow...................................................................................................... 21

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1Safety Instructions
1.1 Intended Use
Tek-Clamp 1200A-100H is a Handheld Ultrasonic Flow Meter are used only for measure
the flow of liquids in closed pipes, e.g.: Clean water, wastewater etc.
The manufacturer is not liable for damage caused by improper or non-designated use.
1.2 Safety Instructions from the Manufacturer
This meter was calibrated at the factory before shipment. To ensure correct use of the
meter, please read this manual thoroughly.
1.2.1 Disclaimer
The manufacturer will not be held accountable for any damage that happens by using its
product, including, but not limited to direct, indirect, or incidental and consequential
damages. Any product purchased from the manufacturer is warranted in accordance with
the relevant product documentation and our Terms and Conditions of Sale.
The manufacturer has the right to modify the content of this document, including the
disclaimer, at any time for any reason without prior notice, and will not be answerable in
any way for the possible consequence of such changes.
1.2.2 Product Liability and Warranty
The operator shall bear authority for the suitability of the device for the specific
application. The manufacturer accepts no liability for the consequences of misuse by the
operator. Wrong installation or operation of the devices (systems) will cause the warranty
to be void. The respective Terms and Conditions of Sale, which forms the basis for the
sales contract shall also apply.
1.2.3 Information Concerning the Documentation
To prevent any injury to the operator or damage to the device it is essential to read the
information in this document and the applicable national standard safety instructions. This
operating manual contain all the information that is required in various stages, such as
product identification, incoming acceptance and storage, mounting, connection,
operation and commissioning, troubleshooting, maintenance, and disposal.
1.2.4 Safety Precautions
You must read these instructions carefully prior to installing and commissioning the
device. These instructions are an important part of the product and must be kept for future
reference. Only by observing these instructions, optimum protection of both personnel
and the environment, as well as safe and fault-free operation of the device can be ensured.

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Warnings and Symbols Used
The following safety symbol marks are used in this operation manual and on the
instrument.
WARNING
Indicates a potentially hazardous situation which, if not avoided, could result in
death or serious injury.
CAUTION
Indicates a potentially hazardous situation which, if not avoided, may result in
minor or moderate injury. It may also be used to alert against unsafe practices.
NOTE
Indicates that operating the hardware or software in this manner may damage it or
lead to system failure.
1.2.5 Packaging, Transportation and Storage
1.2.5.1 Packaging The original package consists of
1. Tek-Clamp 1200A-100H Handheld Ultrasonic Flow Meter
2. Documentation
NOTE
Unpack and check the contents
for damages or signs of rough handling. Report
damage to the manufacturer immediately. Check the contents against the packing
list provided.

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1.2.6 Transportation
•Avoid impact shocks to the device and prevent it from getting wet during
transportation.
•Verify local safety regulations, directives, and company procedures with respect to
hoisting, rigging, and transportation of heavy equipment.
•Transport the product to the installation site using the original manufacturer’s
packing whenever possible. 1.4.3 Storage the Tek-Clamp 1200A-100H is designed
for installation and usage purpose in typical commercial/industrial environments.
The following considerations must be observed in selecting a location for the
meter:
•The ambient operating temperature range is -22°F (-30°C) to 176°F (80°C).
•Do not expose the meter to corrosive liquids or fumes.
•Avoid installation locations that are close to strong sources of electrical
interference.
•Avoid installing the electronics enclosure in direct sunlight.
•Avoid installation locations where the transducers will be exposed to vibrations in
the piping system.
•Always run transducer cables in a dedicated conduit separate from signal and power
cables.
•Allow sufficient space for daily inspection, wiring, etc.
•Avoid installing the meter at a place subjected to, or at risk of, flooding.

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2Product Description
This section covers the reference and specification data, as well as ordering information.
2.1 Introduction
Tek-Clamp 1200A-100H Handheld Ultrasonic Flow Meter is a completely non-invasive
Ultrasonic Flow Meter. The flow meter uses the ultrasonic signal to measure the flow rates
with the transit time method. It consists of the built-in data logger for over 2000 lines of
data and is optional as an external data logger. Tek-Clamp 1200A-100H has a pair of
transducers capable of measuring flow rates in pipes from 1/2" (12.5 mm) to 28" (700 mm)
at temperatures of between 32 °F (0 °C) to 320 °F (160 °C). This flow meter can be virtually
applied to a wide range of measurements. A variety of liquid applications contain potable
water, cooling water, river water, raw sewage, reclaimed water, plant effluent, ultra-pure
liquids, chemicals.
2.2 Measuring Principle
When the ultrasonic wave is transmitted through the flowing liquid, the difference
between the upstream and downstream transit time (travel time or time of flight) can be
calculated, which is proportional to flow velocity.
The formula for calculating velocity is:
Where,
0: Includes angle to the flow direction
M: Travel times of the ultrasonic beam
D: Pipe diameter
Tup : Time for the beam from upstream transducer to the downstream one
Tdown : Time for the beam from downstream transducer to the upstream one
∆T=Tup-Tdown
Fig 1: Tek-Clamp 1200A-100H Handheld Ultrasonic Flow Meter

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2.3 Specifications
Accuracy
±1% of reading at rates >0.2 mps
Velocity
0.03 to 100ft/sec
Repeatability
0.2%
Measurement Period
0-999 seconds, user-configurable
Measurement Principle
Transit Time Ultrasonic Flow Meter
Weight
Portable transmitter weight 514g
Package with accessories weight 6kg
Volume weight for whole package 12kg
Power 100H
3 AAA built-in Ni-MH batteries 1.2V (for over 12 hours of
operation) 90V-260V AC adapter
Power Consumption
1.5W
Environment Temperature
Convertor: -4°F to 140 °F (-20 to 60°C)
Flow Transducer: -22°F to 320°F ( -30 to 160°C)
Environment Humidity
Convertor: 85% RH
Protection Class
Flow Transducer: IP67
Clamp-On
HS-type: for pipe size ½"- 4" (12.5mm -100 mm)
HM-type: for pipe size 2"- 28" (50mm- 700 mm)
Other pipe size available on request
Types
Following Liquids transmit sound wave:
•Single liquid such as, Water (Hot water, Chilled water,
City Water, Sea Water, Wastewater, etc.)
•Sewage with small particle content
•Oil (crude oil, lubricating oil, diesel oil, fuel oil, etc.)
•Chemicals (alcohol, etc.)
•Plant Effluent
•Beverage
•Ultra-pure liquids
Process Temperature
-22°F to 320°F ( -30°C to 160°C)
Pipe Material
Steel, Stainless Steel, Cast Iron, Copper, Cement Pipe, PVC,
Aluminum, Glass Steel Product, Liner is allowed
Pipe Size
1/2" to 28"
Pipe Straight Run
Transducer installation should be satisfied: upstream10D,
downstream 5D, 30D from the pump
Dimensions
8”X 3¾” X 1¼” (200 X 93 X 32mm) (Convertor)

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2.4 Dimensional Drawings
Fig 2: Top View of 1200A-100H Handheld Ultrasonic Flow Meter
Fig 3: Front View of 1200A-100H Handheld Ultrasonic Flow Meter
Fig 4: Bottom View of 1200A-100H Handheld Ultrasonic Flow Meter
Bottom View

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3Installation
This section covers instructions on installation and commissioning. Installation of the device
must be carried out by trained; qualified specialists authorized to perform such works.
CAUTION
•When removing the instrument from hazardous processes, avoid direct
contact with the fluid and the meter
•All installation must comply with local installation requirements and local
electrical code
3.1 Correct Mounting Point
The correct mounting point is a major factor for the installation of a flow Meter. Installation
at wrong point may influence measuring accuracy or flow meter service life, or even
damage the flow meter.
The axis for measuring electrode shall be approximate to horizontal direction.
Tek-Clamp 1200A-100H Handheld Ultrasonic Flow Meter can simplify the ultrasonic flow
meter installation process, by shortening installation time and improving installation
accuracy. Tek-Clamp 1200A-100H Handheld Ultrasonic Flow Meter installed by two
methods:
3.1.1 Clamp on Transducer:
Install the Tek-Clamp 1200A - 100H Handheld Ultrasonic Flow Meter (with magnet) on
the pipe. It can help finish the flow measurement without any pressure drop. The need
for cutting the pipe is eliminated.
Fig 5: Tek-Clamp 1200A-100H Handheld Ultrasonic Flow Meter

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3.1.2 Clamp on mounting bracket transducer
•Install Tek-Clamp 1200A - 100H on the pipe, to finish the flow measurement. The
need for cutting pipe gets eliminated.
•Several types of bracket Tek-Clamp 1200A - 100H are used to measure pipe size
from 1/2’’ to 28’’.
•Several types of bracket Tek-Clamp 1200A - 100H are used to measure
temperature range from -22°F to 320°F (-30°C to 160°C)
3.2 Requirements for Measuring Flow meter Accuracy
•Medium must be conductive.
•The pipe should be completely filled with the medium.
•Medium conductivity should be homogeneous to avoid severe disruption. If chemical
substances need be injected into the pipe, the injection should be operated at upstream
side of flow meter.
•Magnetic flow meter system should be connected to the ground.
•There must be a straight pipe run no less than 5DN at flow meter upstream and 2DN at
flow meter downstream. (DN is the internal diameter of the pipeline).
•Do not install the flow meter near large electrical machine or transformer in order to
avoid the electromagnetic interference.
NOTE
Do not expose the electronic unit box to direct sunlight; in case of outdoor
installation, use a suitable protection shield.
Fig 6: Tek-Clamp 1200A-100H Handheld Ultrasonic Clamp-on mounting bracket transducer

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3.3 Installation Condition
3.3.1 V-method Installation:
V-method installation is the most widely mode for daily measurement with pipe inner
diameters ranging from 15 mm to 400 mm (½" to 16”). It is also called reflective mode.
3.3.2 Z-method Installation
Z-method is commonly used when the pipe diameter is above 8” (200mm).
3.3.3 W-method Installation
W-method is usually used on plastic pipes with a diameter from 2” (15mm to 50mm).
Downs tr eam tr a nsducer
Tub e wal l
Li nin g
Upstr eam tr an sdu c er
Transducer spacing
±45°
±45°
Tup
Tdow n
Ups tr eam tr ans d u ce r
Rust- pr oo f c o verla yer
Tub e wal l
Li nin g
Down str eam tr an sdu c e r
Installation
distan ce
±45°
±45°
Downs tr eam tr a ns ducer
Tub e wal l
Li nin g
Upstr eam tr an sdu c e r
Transducer spacing
±45°
±45°
Fig 7: V-method Installation
Fig 8: Z-method Installation
Fig 9: W-method Installation

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4Electrical Installations
•Please cut off power supply before connecting the device
•Check the cable model before connecting the cable.
•Follow the procedure for cable into lead collar: -
•At first, loosen the gland nut on lead collar and take off blind, secondly, put gland nut and
rubber ring on cable, make the cable through lead collar; finally, straighten out cable,
screw gland nut tight to make rubber ring press cable.
•When wire stripping, do not damage insulating layer which should be reserved.
Fig 11: Tek-Clamp 1200A-100H Converted Terminal and AC/DC Adaptor
Fig 10: TEK-Clamp 1200A-100H Electrical Connections Cables.
Fig 12: TEK-Clamp 1200A-100H Electrical Connections Cables interface.

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4.1 Signal Strength
•Signal strength indicates the amplitude of receiving ultrasonic signals by a 3-digit
number. [000] means there is no signal detected and [999] refers to the maximum
signal strength that can be received.
The following methods are recommended to obtain stronger signals:
•Relocate a more favourable 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.
Try to polish the outer surface of the pipe and apply more coupler to increase the
signal strength.
•Adjust the transducers both vertically and horizontally while checking the varying
signal strength, stop at the highest position, and then check the spacing of the
transducers to make sure the spacing of the transducers.
4.1.1 Signal Quality
Signal quality is indicated by the Q value in the instrument. A higher Q value means high
signal to noise ratio (SNR), which provide higher degree of accuracy in measurement.
Under normal pipe condition, the Q value is in the range between 600-900, the higher the
better.
Disadvantage of lower Q value is as follows:
1) Interference of other instruments and devices such as a powerful transmitter
working nearby. Try to relocate the flow meter to a new place where the
interference can be minimum. Bad sonic coupling for the transducers with the
pipe.
2) Apply more coupler or clean the surface, etc. Pipes are difficult to be measured.
Relocation is recommended.

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4.2 Transmitter Connections
4.2.1 Basic Circuit of the Transmitter
The converter can supply the uncontrollable current to the coil in the sensor of
electromagnetic flow meter. The head amplifier amplifies the electromotive force from
the sensor and converts it into standard signals of current or frequency so that the
signals can be used for displaying, controlling, and processing.
4.3 Digital Output
The transmitter has two output signals i.e., frequency and pulse output. The user can
choose only one type of output.
4.3.1 The Connection of Digital Output
Digital output has two connected points i.e., digital output connected point and digital
ground point,
CAUTION
•Make sure the sensor connected to the earth.
•Make sure the liquid is still when regulating instruments.
•The electrode and the liquid should be in contact for about
48 hours.
4.4 Operation
4.4.1 Keys’ Function
•Keys’ function in self- testing way
“Down” key
Down button cycles through data displayed on
lower lines
“Up” key
Up button cycles through data displayed on lower
lines
“Enter” key
Press it to come into the interface measuring
“Compound” & “Enter”
To enter parameter setting
Under measurement status,
adjustment of the LCD
contract
Push “Down” & “Compound” or “Up” &
“Compound”

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•Push “Down” & “Compound” or “Up” & “Compound”
“Down” key
Subtract 1 from the number above cursor
“Up” key
Plus 1 to the number above cursor
“Compound” & “Down”
To shift cursor to left
“Compound” & “Up”
To shift cursor to right
“Enter” key To enter or exit the submenu, pressure for more
than 2s to exit to measuring status
NOTE
When using the “Compound” key, you should press “Compound” key and “Up” key
both or “Compound” key and “Down” key both.
To select the zero correction about the flow directly use “Down” or “Up” to
Switch.
To set or correct working parameters, the converter should be running in Parameters Setting
Way instead of Measuring Status.
•In Measuring Status, press “Compound” + “Enter” keys getting to the select of
parameter and transfer password (0000).
•Correct the password with one of the new passwords that are provided by
manufacturer. Finally, press the “Compound” +” Enter” keys to work in Parameters
Setting Way.
•There are 6 Passwords in design and among them 4 for deferent operators in secret
and 2 are fixed passwords for system operation.
4.4.2 Menu
•Parameters of converters can decide the running status, process and output ways
as well as state of output. Correct option and setting of parameters can keep the
converters running optimally and get higher accuracies of output bother in display
and in measurement.
•There are 6 grades of passwords for setting parameters function. Grades 1 to
grade 5 of passwords are for users and grade 6 of password is for manufacturer.
Users can reset their passwords of grades 1 to 4 in grade 5.
•Users can check converters parameters in any grade of password. However, if
users want to change parameters of converters, deferent grade of parameters
have to be used by the users.
Steps to Configure the Parameters
1. Pipe outer diameter.
2. Pipe wall thickness.
3. Pipe materials.

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4. Linear material and its sound speed and thickness shows half sentence what any
linear.
5. For non-standard liquids, the sound speed of the liquid is also needed.
6. Generally, the Standard M1 clamp-on transducers is selected.
7. Generally, Transducer mounting methods are the V-method or Z-method is the
common option.
8. Check the space displayed on M25 and install transducer accordingly.
For standard pipe materials and standard liquids, the following detailed step-by-step
setup is recommended.
1. Press keys MENU diameter, and then press 11
ENT to enter M11 window to input the digits for
the pipe outer key.
2. Press key ▼/- to enter M12 window to input the
digits for the pipe outer diameter and then press
ENT key.
3. Press key▼/- (down) to enter M14 window,
and press mode. Use keys ▲/+ (Up) and ▼/-
(down) to scroll up and down to the intended
pipe material, and then press ENT .
4. Press key ▼/- (down) to enter M16 window,
press ENT key to enter the option selection ENT key to enter the option selection
mode, use keys ▲/+ (Up) and ▼/- (down) to scroll up and down to the liner
material, and then press key. Select “ No Liner”, if there is no liner.
5. Press key ▼/- (down) to enter M20 window, press ENT key to enter the option
selection mode, use keys ▲/+ (Up) and ▼/- (down) to scroll up and down to
the proper liquid, and then press ENT key
6. Press key ▼/- (down) to enter M23 window, press key to enter the option
selection mode, ENT use keys ▲/+ (Up) and ▼/- (down) to scroll up and down
to the proper transducer type, and then press ENT key.
7. Press key ▼/- (down) to enter M24 window, press use keys ▲/+ (Up) and ▼/-
(down) to scroll up and down to the proper transducer mounting method, and
then press ENT key
8. Press key ▼/- (down) to enter M24 window to install the transducers on the pipe,
and then press key to go to M01 for the results.
Fig 13: Keypad 1200A-100H

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4.4.3 Menu Window Details
Menu Window
No. Function
Flow
rate/flow
totalizer
display
M00
Display instant flow rate/net totalizer. Adjust the units in M30-
M32
M01
Display instant flow rate/instant flow velocity. Adjust the units
in M30-M32
M02
Display instant flow rate/positive totalizer. Adjust the units in
M30-M32
M03
Display instant flow rate/negative totalizer. Adjust the units in
M30-M32
M04
Display instant flow rate/date time
M05
Display heat flow rate/total heat quantity. Adjust the units in
M84, M88
M06
Display temperature input T1, T2
M07
Display present battery voltage
M07
Display analogue input AI3, AI4
M08
Display system error code
M09
Display today net totalizer
Initial setup
M10
Input outside perimeter of pipe
M11
Input pipe outer diameter, data range:0-18000mm
M12
Input pipe wall thickness
M13
Input pipe inner diameter
M14
Choose the kinds of pipe materials
M15
Input sound velocity of pipe material
M16
Choose kinds of liner
M17
Input the sound velocity of liner
M18
Input the thickness of liner
M19
Input inner pipe wall absolute degree of roughness
M20
Choose kinds of fluids
M21
Input fluid velocity
M22
Input fluid viscosity
M23
Choose the types of transducers, including more than 20 types
to use
M24
Choose transducer installation method
M25
Display transducer installation space
M26
Parameter solidifying and setup
M27
Store and read installation parameters on installation point
M28
When signal set is turning poor, the transmitter keeps the last
data. Choosing ‘yes’ means when the signal is turning poor, the
flow meter will display last correct measured data

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M29
Input signal strength when the pipe flow is set to be empty.
For example: inputting 65 means when the signal strength is
lower than 65, the flow meter will think that there is no liquid in
the pipe and display the flow value as zero
Flow unit
setup
M30
Choose metric or imperial unit
M31
Choose instant flow rate unit
M32
Choose totalizer unit
M33
Choosing the totalizer multiplying factor which function is to
multiply totalizer data rang, normally set it as x1
M34
Net totalizer switch
M35
Positive totalizer switch
M36
Negative totalizer switch
M37
Restore parameters setup before leaving factory and reset
totalizer
M38
Manual totalizer (the key to control on/off)
M39 Choose operating language, including 8 kinds of different
languages for international users to use
M3•
Setup the LCD display method, inputting 0 or 1 means regular
displaying content inputting, 2-39 means automatically cycle
displaying method, displaying the previous menu of 2-39, time
interval is 8 seconds. When there is no input operation, it will
automatically enter cycle displaying status.
Choosing
Setup
M40
Damper coefficient
M41
Input low flow velocity cut-off value
M42
Setup static zero point
M43
Clear the zero-point value and restore the solidified zero-point
value.
M44
Set up zero-point deviant by hand
M45
Flow meter coefficient, rectification coefficient
M46
Input Network address identification number (IDN)
M47
Password protecting operation, after the flow meter is setup
with password, only browse menus without any modification.
M48
Input degree of linearity broken line rectification data.at most
there is 12 segments broken line, used for users to rectify
meter nonlinear.
M49
Network communication tester, on this window to visit the
data transferred from upper computer to judge the problems
arise during communication.
Scheduled
time output
M50
Optional setup of data output at scheduled time, choose
output content at scheduled time to print, more than 20 to
select
M51
Setup output time at scheduled time
M52
Printing data flow direction control.by default printing data will

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flow directly to the thermal printer hanged inside bus. Setup
printing data output to outside serial port (RS485 port)
AI5 setup M53
Display analogue input AI5(reserved for the Tek-Clamp 1200A
mainboard)
Input and
output
setup
M54
Setup of OCT totalizer pulse output, pulse width, range:6 Ms-
1000Ms.
M55
Choose current loop mode
M56
Corresponding data to output of current loop 4mA or 0mA
M57
Corresponding data to output of current loop 20mA
M58
Verification of current loop output applied to check whether
current loop is normal or not.
M59
Present output of current loop
M60
Date time and setup of the date time of the new is realized by
CPU, when upgrading software, time will be slow. So after
upgrading, recommended to adjust the date and time to
display correctly
M61
Software version information and Electronic Serial Number
(ESN)
M62
Setup serial port parameter
M63
Communication protocol choosing (including compatible
protocol choosing), two options, choosing MODBUS-RTU
means using binary system MODUS-RTU protocol. Choosing
MODBUS-ASCII+previous protocol means using ASCII protocol,
at this time can support several protocols simultaneously,
including MOSBUS-ASCII, previous 7 version protocol, FUJI
protocol, Meter-BUSx protocol etc.
M64 Analogue input AI3
By inputting the measuring range, the
flow meter will turn current signal into
data range users need
M65 Analogue input AI4
M66 Analogue input AI5
M67
Setup frequency range of frequency output signal. Frequency
signal output represents instant flow rate value by signal
frequency value. Default: 0-1000Hz, Max-range:0-999Hz.
Output frequency signal by special frequency output unit.
Input and
output
setup
M68
Setup lower limit flow of frequency signal output
M69
Setup upper limit flow of frequency signal output
M70
LCD backlit control
M71
LCD contrast ratio control
M72
Work timer, logging work time of the flow meter by unit of
second.it can reset.
M73
Setup lower limit flow of
By adjusting the lower and