INSTRUCTION MANUAL
Ultrasonic Flowmeter Range
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1 General 4
2 Installation 5
3 Electrical 6
4 Setup 7
5 Technical Specification 21
CONTENTS Page No
The Atrato range represents a new generation of through bore time of flight ultrasonic
flowmeters that uses breakthrough technology to offer a wide ranging yet accurate
meter. It is ideal for many process control, instrumentation and laboratory applications.
The user must make sure that the flowmeter selected is suitable for the application and
that the chemical compatibility, temperature and pressure requirements are within the
Atrato’s operating range. Please check the model number before proceeding. All meters
can be programmed and monitored via the USB connection.
1 General
4
First 3 digits Flow range
710 = 2 - 500 mL/min
720 = 0.01 - 1.7 L/min
740 = 0.02 - 5 L/min
760 = 0.1 - 20 L/min
Fourth digit seal material
V = Viton
®
N = Nitrile
E = EPDM
S = Silicon
Fifth digit end fittings
0 = 3/8” John Guest 10 bar
1 = 1/2” BSP PEEK 10 bar
2 = 1/2” NPT 316 St St 30 bar
3 = 1/2” BSP 316 St St 30 bar
Sixth digit Wetted materials
0 = PEEK/316 St St
1 = PEEK / Borosilicate glass
Seventh/eighth digit Electronics package
A = Analogue output
D = Display & analogue output
RA = 110°C Sensor remote electronics analogue output
RD = 110°C Sensor remote electronics display & analogue output
For example
760 – V10 – D
This is a 20 L/Min flowmeter with Viton seals, half inch BSP fittings and a 316 stainless
steel flow tube with PEEK end fittings, fitted with a local digital display and an analogue
output.
• Locate the flowmeter in a sheltered position away from falling water.
• Care must be taken to ensure that the end fittings on the meter are not stressed during
use. Ideally, flexible tubes should be used.
• Ideally the meter should be installed with straight lengths of tube either side for a
distance of 10 pipe diameters upstream and 5 downstream.
• Install the device well away from valves, regulators bends and other components that
could cause excessive turbulence on the fluid entering or leaving the meter.
• If necessary use spacer blocks and mounting clips to raise the pipe work centre line
58mm above the surface.
• It is good practice to use upstream and downstream isolating full bore ball valves to
facilitate easy meter installation or removal.
• If push-in 3/8” John Guest fittings are used, clip the pipes to the mounting surface
300mm upstream and 150 downstream.
• The Atrato must be installed in a positive pressure system. Ensure that there is
sufficient back pressure on the flowmeter to keep any gas in solution. We recommend
500mbar plus two times the fluid vapour pressure.
• If there is any chance of air passing through the system mount the Atrato in a vertical
pipe with the flow in an upward direction otherwise air can remain trapped in the meter
and affect it’s performance.
2 Installation
5
Using suitable fixings, mount the connection box onto a rigid surface with the cable entry
preferably at the bottom. The mounting screw centres are shown in the diagram on the
right. The flowmeter should be clipped into place with the terminal screws positioned at
the lower edge. Note that the rubber strip covering the terminals on the meter will not
seal if water is persistently present in this area. Ensure the meter is not pressure washed.
The Atrato can easily be dismounted by inserting a screwdriver under the mounting
clip and gently unclipping it to release the main body. The PG9 thread can be either
connected to suitable flexible conduit or may be fitted with the supplied cable gland.
End fitting ‘B’ Order code Dimension ‘A’ mm
3/8” John Guest 0 145
1/2” BSP PEEK 1 142
1/2” NPT 2 180
1/2” BSP stainless 3 180
75
‘A’
PG9
‘B’
58
82
14
60
22
The Atrato can be operated entirely from a computer using the USB connection but this
may not be acceptable in many situations where remote operation or further functions
are required. The unit will work with systems from Windows XP onwards. The maximum
connector cable size is 2.5mm (22-14AWG), for ease of assembly we recommend 1mm
maximum. Care should be taken when terminating the wires as the conductors should
be stripped to 4 to 5mm maximum and the wire ends must be pushed fully into the
connector before tightening. These cables pass through a slot cut in the aluminium
housing please ensure that no bare conductors are clear of the surface of the connector
strip prior to closing the housing.
3 Electrical
Atrato Connector Assignments
Pin No Label Function
1 Relay NO Isolated relay contact; normally closed contact 24V 100mA
2 Relay Common Isolated relay contact; change over contact 24V 100mA
3 Relay NC Isolated relay contact; normally open contact 24V 100mA
4 4-20mA Analogue current (4-20mA) output (reference to 0V)
5 0-5/10V Analogue voltage (0-5/10V) output (reference to 0V)
6 PNP Output 1 open collector PNP OR Input 1 (5-24V dc) e.g. switch to pin 9
7 NPN Output 2 open collector NPN OR Input 2 (5-24V dc) e.g. switch to pin 8
8 0V External ground; common for PNP, NPN and Analogue outputs
9 +9 -24V dc External power; 9V ~24V (> 12V for Analogue output)
6
= Operates on External Power or USB = Operates on External Power only
Before use, download and install Atrato software from memory stick or website.
The Atrato low-flow ultrasonic flowmeter should be setup using the USB interface and a
suitable computer. Below is a screen shot of the Configuration screen.
The panel below shows the functions of the panel on the top left of the screen.
Control buttons to apply the settings and recover previously set parameters.
4 Setup
7
Send settings to system
Retrieve Settings from meter
Open settings file on the computer
Save settings to a file on the computer
Test outputs
Unlock/Lock User Settings
Diagnostic Tools
Software Information
To modify the configuration click “User Settings” tab at the bottom of the screen and
ensure the system is unlocked for editing.
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