Aquametro AOM-CMT45 Installation manual

Version: VD 7-827e 03.2022
Installation & Startup Guide
AOM-CMT45
Coriolis Transmitter

2 AOM-CMT45 – Coriolis Transmitter
Content
1General Information..................................................................................................................... 3
1.1 Important Safety Instructions for operating Coriolis Flowmeters....................................................................................3
1.2 Manufacturer’s Liability.....................................................................................................................................................................3
1.3 Additional Resources .........................................................................................................................................................................3
2Quick Start .................................................................................................................................... 3
3Installation .................................................................................................................................... 4
3.1 Mechanical Installation......................................................................................................................................................................4
3.2 Electrical Installation...........................................................................................................................................................................4
Connectors.......................................................................................................................................................................................4
Power Supply and Grounding..................................................................................................................................................6
Control Inputs and Outputs......................................................................................................................................................7
4Operation and Configuration...................................................................................................... 8
4.1 Operating elements............................................................................................................................................................................8
External..............................................................................................................................................................................................8
Internal operating elements .....................................................................................................................................................9
Zero offset calibration w/o interface.....................................................................................................................................9
4.2 Operation and configuration via display................................................................................................................................. 10
Function of the push buttons................................................................................................................................................ 10
Passcodes and menu selection............................................................................................................................................. 11
Zero offset calibration..............................................................................................................................................................11
Change of positive flow direction........................................................................................................................................ 12
Input/Output configuration ................................................................................................................................................... 13
Internal system time.................................................................................................................................................................. 16
5Remote Operation...................................................................................................................... 17
6Service and Maintenance........................................................................................................... 18
6.1 Maintenance and Calibration....................................................................................................................................................... 18
6.2 Supervision and Troubleshooting..............................................................................................................................................18
6.3 Service...................................................................................................................................................................................................24
6.4 WEEE and RoHS.................................................................................................................................................................................24
Appendix A Technical Information ................................................................................................ 25
A.1 Technical Data....................................................................................................................................................................................25
A.2 Mechanical Drawing........................................................................................................................................................................ 26

AOM-CMT45 – Coriolis Transmitter 3
1 General Information
1.1 Important Safety Instructions for operating Coriolis Flowmeters
The AOM-CMT45 transmitter model is integrated in all AOM-CM flow sensors. Maximum
temperature limits for each AOM-CM flow sensor are stated on the permanently attached
serial number plate and must not be exceeded.
The closed transmitter box provides a protection class of at least IP66.
The use of a properly grounded supply is highly recommended.
The use of shielded cables for all I/O signals is recommended to prevent interference from
high level EMI.
For safety instructions regarding AOM-CM Coriolis Flow Sensors, please refer to the AOM-
CM installation and start-up guide manual.
These measuring instruments are not designed for, and should not be installed in, life-
preserving systems used in the medical, motor vehicle, aircraft, water craft or mining
industries.
All national regulations and standards regarding electrical installation must be observed!
1.2 Manufacturer’s Liability
Aquametro Oil & Marine assumes no liability for loss and/or consequential damages
stemming from the use of this product utilized in life-preserving systems in the medical,
motor vehicle, aircraft, water craft or mining industries.
Aquametro Oil & Marine accepts no liability for loss or damage resulting from the improper
use of any of its products.
Aquametro Oil & Marine assumes no liability for the loss of production and/or consequential
damage from the use of this product unless such liability has been expressly and
contractually agreed.
Aquametro Oil & Marine provides a standard one year from shipment warranty on all
products for workmanship and materials.Performance of this warranty will be at the
Aquametro Oil & Marine manufacturing facility.
Aquametro Oil & Marine assumes no liability for determining the suitability of its products in
any specific application. This is the sole responsibility of the end user.
1.3 Additional Resources
Since this document mainly describes the installation and commissioning of the AOM-CMT45 transmitter it does
not contain all information related to the configuration of the transmitter and its features. These items are
described extensively in the AOM-CMT45 Operation & Configuration Manual (VD 7-828e 02.2022). Manuals and
further resources are available for download from the Aquametro Oil & Marine website:
www.aquametro-oil-marine.com
2 Quick Start
Carry out the following steps to prepare the flow meter for operation:
1) If not already done, install the AOM-CM sensor in line (refer to the AOM-CM Coriolis Sensor Installation
Guide for additional information on mechanical installation).

4 AOM-CMT45 – Coriolis Transmitter
2) Connect all signal input, output and communications interface wiring as required (section 3.2.3).
3) Connect power supply (section 3.2.2).
NOTE!
For safety, always connect the protective ground.
4) Switch on the power supply. The “READY” LED will light up (only visible when transmitter enclosure is
opened).
5) Flush the AOM-CM flow sensor with process fluid and ensure that it is free of air bubbles (in case of a
liquid process fluid) or liquid droplets (in case of a gaseous process fluid).
6) Wait until the AOM-CM temperature has stabilized and then carry out a zero-point calibration (section
4.3):
Ensure a zero-flow condition is present in the flow sensor by closing isolation valves
Initiate zeroing of the sensor and wait for the zeroing procedure to complete
Open isolation valves to allow flow through the sensor
The device is ready for operation.
3 Installation
3.1 Mechanical Installation
The AOM-CMT45 is connected to the AOM-CM ex works and cannot be removed.
For mounting the AOM-CM refer to the corresponding manual delivered with the AOM-CM.
When hot fluids are to be measured the housing of the AOM-CMT45 transmitter must not be
thermally isolated from the ambient for avoiding overheating the electronics.
When planning the mechanical installation please leave at least 12.5 cm/5 inch space for the M12 plugs and the
attached cables at the side where the M12 sockets are located.
Technical data and mechanical drawings can be found in Appendix A.
3.2 Electrical Installation
CAUTION
The surface of the AOM-CMT45 may be hot if a hot fluid is running through the AOM-CM
sensor.
Any cable used for connecting to the AOM-CMT45 transmitter must be specified for 80°C or higher.
The use of shielded cable is strongly recommended.
Connectors
The AOM-CMT45 has one 12-pin M12 connector, “A” coded, for power supply and standard interfaces and one
8-pin M12 connector, “A” coded for high-speed interfaces of Ethernet 100base TX type.
With the I/O configurations B1, S1, S2, P1, and P2 the 8-pin socket is internally not connected.
The 8-pin M12 connector is not included in the standard scope of supply.
As accessories Aquametro Oil & Marine offers readily configured cables.

AOM-CMT45 – Coriolis Transmitter 5
3.2.1.1 12-pin M12 Connector
The 12-pin M12 connector of the AOM-CMT45 provides power supply, RS485 interface, digital outputs, digital
input, and the analog 4-20mA interfaces.
CAUTION
Before connecting the 12-pin M12 socket please check that the power supply is correctly
connected to the pins 1 and 3 of the 12-pin M12 plug to prevent damage.
The following figures show the pin numbering of the 12-pin M12 socket in the AOM-CMT45 transmitter and a
respective plug.
Fig. 1: Pin numbering of the AOM-CMT45 12-pin M12 socket
Fig. 2: Pin numbering of an 12-pin M12 plug
Table 2: Pin configuration of the 12-pin M12 socket
Pin #
Signal
I/O Option
Remark
Circuit diagram
1
+24V
all
Positive supply terminal
2 AO1-
S1, S2, P1,
or P2
Negative terminal for analog output 1
3
0V/GND
all
Ground for power supply
4 RS485- all
Negative signal of the two-wire
RS485 interface
5 DO1 all
Digital output 1 (called channel 0/A in
the Modbus documentation)
6 RS485+ all
Positive signal of the two-wire RS485
interface
7
DI1
all
Digital input 1
8 DO2 all
Digital output 2 (called channel 1/B in
the Modbus documentation)
9 AO1+
S1, S2, P1,
or P2
Positive terminal for analog output 1
10
I/O GND
all
Ground for digital in- and outputs
11
AO2+
S2, or P2
Positive terminal for analog output 2
12
AO2-
S2 or P2
Negative terminal for analog output 2
Shield
Ground / PE
all
3.2.1.2 8-pin M12 Connector (not included in standard scope of supply)
The 8-pin M12 connector is only connected internally, if one of the following options is installed:
EA, EB
Modbus TCP
EN EtherNet/IP
EP
ProfiNet
DP
Profibus DP
EC
EtherCAT
Top view
plug
Top view
socket

6 AOM-CMT45 – Coriolis Transmitter
The drawing shows the pin numbering of an 8-pin M12 connector. The function of the pins for the different
options is described in chapter 5.
Fig. 3: Pin numbering of the AOM-CMT45 8-pin M12 socket
Fig. 4: Pin numbering of an 8-pin M12 plug
Power Supply and Grounding
For connections longer than 0.5m shielded cables should be used. For connections longer than 3m, additional
ferrite filter beads close to the AOM-CMT45 are recommended for avoiding RF EMI.
The power supply input is protected by a fuse. As a protection against fire in case of a short in the cable, the
supply side of the cable should be protected by a fuse (see figure 5, SI1) with a rating not higher than the
current carrying capacity of the cable.
The ground signal of the AOM-CMT45 (Terminal 3 and 10 of the 12 pin M12 connector) is connected to PE and
housing via a 10kΩ resistor.
The cables used for power supply and grounding must comply with the national requirements. If
required, certified cables must be used. The minimum cross section is 0.35mm² (AWG 22).
The AOM-CMT45 does not contain a mains switch. A switch or circuit breaker close to the AOM-
CMT45 must be included in the supply line. The switch must be marked correspondingly.
3.2.2.1 Grounding and shielding
An AOM-CM sensor with an AOM-CMT45 transmitter must be grounded. Refer to the manual of the AOM-CM
sensor for the position of the ground terminal.
The cross-sectional area of the grounding wire must be equal to or larger than the conductors used for any
supply or I/O connection.
NOTE!
National and local electrical code requirements may contain additional grounding requirements.
Please ensure that all grounding is carried out according to these [legal] requirements.
For connections longer than 0.5m shielded cables should be used. For best EMC performance the shield should
be connected on both ends of the cable. If the shield cannot be connected on both ends due to potential
differences between PE on both ends, one end might be connected to PE via a 1nF capacitor on one end.
3.2.2.2 Power Supply
The AOM-CMT45 requires a regulated DC supply voltage of
12V or 24V. It will operate with a power supply in the range
10V to 28V.
Connect the positive supply to terminal 1 and 0V to terminal
3 of the 12-pin M12 connector.
Terminal 3 (0V) and housing (PE) are connected via a 10kΩ
resistor. The resistor can withstand a potential difference of
up to 30V between 0V and PE, but voltage differences above
5V should be avoided. For best EMC performance connect
the supply ground to PE close to the AOM-CMT45.
Top view
socket
Top view
plug
Figure
5: DC power supply

AOM-CMT45 – Coriolis Transmitter 7
Control Inputs and Outputs
In general, shielded cables should be used for cable connections longer than 0.5m. For cable connections longer
than 3m, it is recommended that ferrite filter beads are installed close to the AOM-CMT45 terminations to help
avoid RF EMI.
3.2.3.1 Digital Outputs
The AOM-CMT45 has two universal digital outputs which can be used as frequency, pulse or control/status
outputs.
Digital outputs are push-pull outputs compliant to IEC 60946 (potential-free). They can drive loads connected to
ground and loads connected to +24V.
Figure 6: Digital Outputs
Connect the output of the AOM-CMT45 to the load. Connect the other side of the load to either GND or to the
positive supply rail. With a grounded load, the output current should be limited to 20mA (480mW at 24V). With
a load connected to the positive supply rail the output can drive up to 50mA (1.2W at 24V).
The output can drive relays directly as well. Relays should be connected between the output and the positive
supply rail.
Figure 7: Digital output with relays

8 AOM-CMT45 – Coriolis Transmitter
The maximum output current is internally limited to 50 mA. If the output current exceeds this limit due to a too
low load resistance, the output will be disabled automatically.
3.2.3.2 Digital Inputs
AOM-CMT45 transmitters have one or two IEC60946 compliant digital inputs (potential-free).
Digital inputs have an input resistance of 24 kΩ and when operated, will draw approx. 1 mA when connected to a
24 VDC supply.
Figure 8: Digital inputs
Digital inputs can be operated with an active DC signal instead of a switch. The maximum input voltage must not
exceed 30 VDC. The required input voltage for a low-high transit is typically 11 V, maximum 12.5 V, corresponding
to an input current of about 0.5mA.
The digital input 2 is not available in standard scope of supply.
4 Operation and Configuration
4.1 Operating elements
External
Figure 9: AOM-CMT45 enclosure in standard orientation
If the 8-pin M12 connector is not used, it must be closed with the protection cap delivered with the AOM-CMT45
for maintaining the ingress protection.
M12 8-pin socket
M12 12-pin socket
Display with control keys

AOM-CMT45 – Coriolis Transmitter 9
Internal operating elements
When the cover of the AOM-CMT45 enclosure is removed a part of the electronics becomes accessible which
contains some user configurable elements, e.g.:
1. Mini USB socket
2. Status LEDs, green (ON), yellow (Hard Lock switch active), red (ERROR)
3. Hard Lock switch (option)
4. RS485 termination switch
5. Push button “ZERO”
6. Power supply fuse
7. Display with control keys (optionally)
Figure 10 depicts the AOM-CMT45 transmitter without display when the cover is open.
When opening the cover of the AOM-CMT45 enclose make sure that no fluids enter the
enclosure and observe basic EMC measures such as connecting yourself to the earth potential
of the enclosure.
Figure 10 also shows the switch positions for the activation or deactivation of the RS485 termination and the
Hard Lock switches. The activation of the Hard Lock switch also will be shown by the yellow LED being lit. In this
case no modification of setup parameters is possible.
Figure 10: AOM-CMT45 with open enclosure
Zero offset calibration w/o interface
After installation of the AOM-CM sensor with AOM-CMT45 transmitter a zero calibration is strongly
recommended.
Flush the AOM-CM with the fluid to be measured and make sure that the sensor is 100% filled.
Operate the AOM-CMT45 for at least 15 minutes for warming up.
Open the top cover of the AOM-CMT45 by removing the 4 screws in the corners of the top cover.
Stop the flow and make sure that there is no more flow. For best results a valve in front and behind the
AOM-CM would be recommended.
Press the push button “ZERO” with a tool (screwdriver, pencil) for about 2 seconds. The red and the green
LED star flashing.
When the flashing stops and the green LED lights constantly reclose the top cover.
Reopen the valves.
Make sure that the top cover gets properly closed for achieving the IP protection.
The AOM-CMT45 must not be opened in wet or dirty (dusty) ambient or when the housing of the
AOM-CMT45 is wet.
ON
INACTIVE
1
2
3
5
6
OFF
4
ACTIVE

10 AOM-CMT45 – Coriolis Transmitter
4.2 Operation and configuration via display
Optionally, the AOM-CMT45 transmitter has a user operation interface consisting of a color LCD screen and
three push buttons. The screen and push buttons are used to navigate through a hierarchical menu structure
that logically and intuitively organizes the various features and functions available within the programming set
supplied with the instrument. This chapter gives a short introduction into operation of the AOM-CMT45 through
the front panel user interface. For more detailed information, please refer to the AOM-CMT45 Operation &
Configuration Manual.
Function of the push buttons
AOM-CMT45 transmitters can be operated through three front panel push buttons. These are labeled “ESC” [X],
“NEXT” [>], and “ENTER” []. The function of these push buttons depends upon the currently displayed screen.
The following table details button function in specific situations.
Table 3: Functions of the push buttons
Button
Situation
Function
ESC
Menu Navigation
Navigates to the menu one level up
Number Input
Exits number input field and returns to the associated menu window
without saving any changes
NEXT
Menu Navigation
Selects the next menu item
During Number
Input
Increments the number at the cursor position by one. Number increment
is circular: a ‘9’ increments to ‘0’ for decimal numbers, ‘F’ increments to
‘0’ for hexadecimal numbers (used for service password)
Number Sign
Change
Changes ‘+’ to ‘-’ and vice versa. When entering a number with a sign
character, the cursor will start at the first number character to the right
of the sign character in the field. In order to reach the sign character, it
is necessary to traverse all the way to the rightmost character and then
start at the beginning of the input field again
Decimal Point
Position Change
Shifts the decimal point and cursor position one place to the right
End of input line The entire number will flash upon pressing ENTER at the rightmost
character in an input field. Pressing NEXT when the field is flashing will
return the cursor to the start of the input line
ENTER
Menu Navigation
Navigates to the menu one level down or enters an input screen
During Number,
Sign or Decimal
Point entry/
change
Moves the cursor one character to the right in an input field. Note that
when a number is entered that is not in the parameters’ acceptable
range, the field will change to inverse colors (light on dark instead of
dark on light). When a number is not within an acceptable range,
pressing ENTER at the rightmost character in the field will return the
cursor to the leftmost position in the field for re-editing.
Number Input at
the End
Pressing ENTER at the rightmost character in the field will cause the
entire field to flash. Pressing ENTER again will commit the modified
number and return display to the associated menu window
Status Info’s - Bit
Status Displays
Increment the index of individual bits in the status words. Successively
pressing ENTER in the Error Status, Soft Error Status, or Warnings items
will allow display/read of each individual bit value and its status
description