Airmar SMARTFLEX DFM-1000-SA-L User manual

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Diesel Flow Meter
Installation and User Manual
D-21349-rev.1 102945-rev.1 02/24/23

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Airmar Diesel Flow Meter (DFM)
Installation Instructions
Covering models:
DFM‐1000‐SA‐L, DFM‐1000‐SB‐L, DFM‐2000‐SA‐L, DFM‐2000‐SB‐L, DFM‐4000‐SA‐L,
DFM‐4000‐SB‐L, DFM‐1000F‐SA‐L, DFM‐1000F‐SB‐L, DFM‐2000F‐SA‐L, DFM‐2000F‐
SB‐L, DFM‐4000F‐SA‐L, DFM‐4000F‐SB‐L, DFM‐50‐SA, DFM‐100‐SA, DFM‐250‐SA,
DFM‐500‐SA, DFM‐50‐SA‐L, DFM‐100‐SA‐L, DFM‐250‐SA‐L, DFM‐500‐SA‐L,
DFM‐100‐DA, DFM‐120‐DA, DFM‐250‐DA, DFM‐300‐DA, DFM‐500‐DA, DFM‐600‐DA
Attention:
1. The DFM Sensor REQUIRES an Airmar SmartBoat or SmartFlex
Module (ASM) to operate
2. All models are congured for Diesel Fuel only
3. It is recommended that after installation all ttings be tested for
leaks
4. ONLY Liquid Pipe sealant should be used – NO Teon Tape
5. Use of engine rated particulate lters is recommended
1.1 Theory of Operation
The Airmar DFM operation is based on the measurement of fuel
volume passing through the ow chamber. The fuel pressure passing
through the chamber causes the ring slides along the inner wall to
rotate, which generates a pulse used to measure volume.
1.2 Physical Mounting
The DFM should be installed in an accessible location for service.
The DFM should be installed forward of the fuel pump if possible.

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The ow meter can be installed up to 30 degrees of incline (fuel
output up)
1.3 Electrical Connection
The DFM comes equipped with a M12 Device Net connector to aid in
a quick and easy connection.
Sensor Connections should be made to the secondary bus of the
ASM as dictated by the ASM Installation guide for Digital Sensors.
Up to 10 Fuel Flow sensors can be connected to a single ASM
secondary bus input.

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1.4 Fuel Line Connection
Refer to the sensor specications to determine inlet and outlet
thread type and diameter.
Sensor Connections should be made to the secondary bus of the
ASM as dictated by the ASM Installation guide for Digital Sensors.
Up to 10 Fuel Flow sensors can be connected to a single ASM
secondary bus input.
A fuel line bypass with gate valve is recommended to complement
servicing of the fuel sensor, as this allow the sensors to be removed
from the vessel without disrupting engine operation. An example is
provided below:
Fuel line size should be maintained by the engine rating and
installation specications.
To ensure proper operation all air must be bled from the fuel system
prior to operation. Follow the engine manufacturer’s instructions for
doing so.

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1.5 LCD Operation (if applicable)
Informational screens are switched/advanced when the surface
below the display is tapped with a magnetic key (included with LCD
sensor variant).
In order to save the charge of the built-in battery, the display goes
to sleep mode one minute after the last touch of the cover by the
magnetic key. At the same time dots are shown on the display.
Multiple data points are available by continuous tapping of the touch
area of the fuel sensor.

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Screen 1 displays “Total Fuel Consumption” Counter value accumulated since DFM
has been powered.
Screen 2 displays “Total Fuel Consumption value with higher digit capacity”
Counter, accumulated since DFM has been powered. Reading accuracy is increased
byone decimal.
Screen
No Displayed data Digit capacity
Units
Metric System
of Measures
US System of
Measures
1 “Total Fuel Consumption”
Counter
0.00001 m³ gal
0.01 l
2 “Total Fuel Consumption”
Counter with higher digit
capacity
0.000001 m³
gal
0.001 l
3“Engine Operation Time”
Counter
0.1 h h
4 “Engine Operation Time”in
“Idle”Mode Counter
0.1 h h
5 “Engine Operation Time”in
“Optimal”Mode Counter
0.1 h h
6 “Engine Operation Time”in
“Overload”Mode Counter
0.1 h h
7 “Engine Operation Time”in
“Tampering”Mode Counter
0.1 h h
8“Engine Operation Time”
Counter. Clearable
0.1 h h
9 “Total Fuel Consumption”
Counter. Clearable
0.00001 m³ gal
0.01 l
10 “Total Fuel Consumption”
Counter. Tampering Mode
0.00001 m³ gal
0.01 l
11 “Interference Time” Counter 0.1 h h
12 “Instant Fuel Consumption” 0.00001 m³/h gal/h
0.01 l/h
13* “Total Dierential Fuel
Consumption” Counter
0.00001 m³ gal
0.01 l
14* “Instant Dierential Fuel
Consumption”
0.00001 m³/h gal/h
0.01 l/h
15 “Battery Charge in Percent-
age of the Maximum”
1 % %
16 “Temperature in the
Measuring Chamber”
1 °C °F
17 “Firmware Version” -X.X

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Screen 3 displays the Counter readings “Engine Operation Time” accumulated as the
total time of engine operation in all modes including idle run.
Screens 4…6 display the Counters readings of “Engine Operation Time in“Idle”,
“Optimal” and in “Overload” Modes” accumulated by DFM as a total engine operation
time in corresponding modes.
Screen 7 displays the Counters readings of “Engine Operation Time in “Tampering”
Mode” accumulated by DFM as a total time of engine operation when consumption
was higher than maximum possible. Value increase of this counter indicates the
incorrect installation of the fuel ow meter or possible fuel theft.
Screen 8 displays the Counter readings of “Engine Operation Time. Clearable”, which
was accumulated as a total time of engine operation in all modes, including idling.
Counter data could be reset using service software or by applying a magnetic key
(3…5) s to a switching zone of DFM’s cap when Screen 8 is active.
Screen 9 displays the Counter readings of “Total Fuel Consumption. Clearable”, which
was accumulated by DFM since its production. Counter data could be reset using ser-
vice software or by applying a magnetic key (3…5) s to a switching zone of the DFM’s
cap when Screen 9 is active.
Screen 10 displays the Counter readings of “Total Fuel Consumption. “Tampering”
Mode” accumulated by the DFM, measured as the amount of fuel higher than maxi-
mum consumption. Value increase of this counter indicates the incorrect installation of
the fuel ow meter or possible fuel theft.
Screen 11 displays the Counter’s “Interference Time” accumulated by the DFM as the
total time of exposure to external factors (strong magnetic eld). Increase of the values
of this counter may indicate an installation of the fuel ow meter near a source of
strong electromagnetic radiation or deliberate attempts to lock the fuel meter.
Screen 12 “ Instant Fuel Consumption” displays current value of fuel consumption. It
can serve for a visual check of device operability and its correct installation.
Screen 13 displays “Total Dierential Fuel Consumption” counter value, accumulated
in dierential mode.
Screen 14 “Instant Dierential Fuel Consumption” displays current dierential fuel
consumption (a dierence between fuel consumption in chamber of each ow meter)
on display of DFM installed in fuel feed line and operating in pair with DFM installed in
fuel reverse line.
Note — If Slave Flow meter is disconnected, current dierential fuel consumption
will not be displayed. Master Flow meter’s display will show screen similar to
“Tampering”mode screen.
Screen 15 “Battery Charge in Percentage of the Maximum”displays the value of
remaining charge of integrated battery.
Note — When the environment temperature is below 10 °C, displayed value of
remaining charge can decrease by (10…30) %.
Screen 16 “Temperature in the Measuring Chamber” displays current temperature
value in the measuring chamber of the fuel ow meter.
Screen 17 “Firmware Version” displays the rmware version (X.X) installed on the fuel
meter.

1.6 Anti-Tamper Modes
1) “Tampering” Mode is to protect from tampering which has a purpose
to increase fuel consumption counters readings (e.g., blowing with
air). Tampering usually causes a rapid increase of readings exceeding
the maximum ow rate limit. Once this increase is observed the sensor
suspends fuel consumption counters. At the same time the“Tampering”
Counter is activated, and it records the volume value that passes through
the meter at the increased ow rate.
Fuel sensor displays dashes being in“Tampering”Mode
Display view in “Tampering” Mode
The meter will automatically exit “Tampering”Mode a few seconds after
operation and revert to normal operating conditions.
2) “Interference” Mode is designed to protect the fuel sensor from
magnetic eld impact with the purpose to stop fuel counting or to
tamper readings of fuel consumption. When exposed to an external
magnetic eld, it registers an attempt of interference. This results in
a stop of fuel measurement and the time of exposure is recorded in a
special“Interference Time”Counter.
The unit displays vertical strokes in“Interference” Mode
Display view in “Interference” Mode
The meter will automatically exit Interference mode a few seconds after
operation and revert to normal operation conditions.
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For full instructions for setting your DFM up in the
SmartFlex Software, visit:
https://www.airmar.com/uploads/InstallGuide/D-20189.pdf#page=87