Maretron FPM100 User Manual

®
FPM100  
Fluid Pressure Monitor  
User’s Manual  
Revision 1.3  
Copyright © 2012 Maretron, LLP All Rights Reserved  
Maretron, LLP  
9014 N. 23rd Ave #10  
Phoenix, AZ 85021  
Maretron Manual Part #: M002801  
Revision 1.3  
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Table of Contents  
2.5.1 NMEA 2000® Connection....................................................................................7  
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FPM100 User’s Manual  
Table of Figures  
Figure 4 – Fluid Level Measurement with Pressure Transducer................................................ 6  
Figure 5 - Tank Mounting of the Pressure Transducer with Recommended Ball Value............. 7  
Figure 6 – NMEA 2000® Connector Face Views ....................................................................... 8  
Figure 8 – Empty Tank Depth and Full Tank Depth Parameters ............................................. 12  
Table of Appendices  
Appendix A – NMEA 2000® Interfacing.................................................................................... A1  
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1 General  
1.1 Introduction  
Congratulations on your purchase of the Maretron Fluid Pressure Monitor (FPM100). Maretron  
has designed and built your monitor to the highest standards for years of reliable, dependable,  
and accurate service.  
Maretron’s Fluid Pressure Monitor (FPM100) is used to adapt up to six pressure transducers to  
the NMEA 2000® network (pressure transducers sold separately). This allows you to observe  
fluid pressures and tank levels anywhere on the vessel where there are NMEA 2000®  
compatible displays. With the appropriate transducer, the FPM100 reports either pressure or  
vacuum for a variety of applications including water pressures, oil pressures, hydraulic  
pressures, or system vacuum for detecting clogged filters.  
The FPM100 also has a tank level mode, so that fluid levels in a tank can be monitored via a  
pressure transducer mounted at the bottom of the tank and transmitted over the NMEA 2000®  
network. This allows you to monitor the fluid levels in tanks that are extremely deep, have  
internal structures, or are otherwise not suited for other tank level sensing technologies. In this  
mode, the FPM100 can be calibrated for irregular tank shapes so that you know the true level  
of the tanks.  
The Maretron FPM100 is designed to operate within the harsh demands of the marine  
environment. However, no piece of marine electronic equipment can function properly unless  
installed, calibrated, and maintained in the correct manner. Please read carefully and follow  
these instructions for installation, calibration, and usage of the Maretron FPM100 in order to  
ensure optimal performance.  
1.2 Firmware Revision  
This manual corresponds to FPM100 firmware revision 1.0.1.  
1.3 Features  
The Maretron FPM100 has the following features:  
NMEA 2000® interface  
Adapts up to six pressure transducers to the NMEA 2000 network  
Each channel independently programmable to match pressure transducer  
characteristics  
Each channel independently programmable to pressure/vacuum mode or tank level  
mode  
In Pressure Mode:  
o Can report programmable pressure sources including Water Pressure,  
Atmospheric Pressure, Compressed Air Pressure, Hydraulic Pressure, Steam  
Pressure, or User Defined pressure sources.  
In Tank Level Mode:  
o Pressure transducer allows use in extremely deep or irregularly shaped tanks  
that can’t be sensed using other technologies  
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o 16 programmable tank types including Fuel, Fresh Water, Waste Water  
o Programmable tank number(s) up to 16 per tank type  
o Programmable tank capacity  
1.4 FPM100 Accessories  
Maretron offers the following accessories for the FPM100:  
PT-V-0-1BAR-01 Pressure Transducer Vacuum to 1 Bar (14.5 PSI)  
PT-0-3PSI-01  
PT-0-5PSI-01  
PT-0-10PSI-01  
PT-0-50PSI-01  
PT-0-100PSI-01  
PT-0-300PSI-01  
PT-0-500PSI-01  
Pressure Transducer 0 to 3 PSI (0.21 bar)  
Pressure Transducer 0 to 5 PSI (0.34 bar)  
Pressure Transducer 0 to 10 PSI (0.69 bar)  
Pressure Transducer 0 to 50 PSI (3.45 bar)  
Pressure Transducer 0 to 100 PSI (6.89 bar)  
Pressure Transducer 0 to 300 PSI (20.68 bar)  
Pressure Transducer 0 to 500 PSI (34.47 bar)  
PT-0-1000PSI-01 Pressure Transducer 0 to 1000 PSI (68.95 bar)  
PT-0-3000PSI-01 Pressure Transducer 0 to 3000 PSI (206.84 bar)  
PT-0-5000PSI-01 Pressure Transducer 0 to 5000 PSI (344.74 bar)  
PT-SNUB-01  
Pressure Snubber  
WARNING  
Maretron pressure transducers are not approved for use with gasoline. If you  
wish to use the FPM100 to monitor pressures or levels of gasoline, you must  
obtain a pressure transducer that is approved for use with gasoline.  
1.5 Quick Install  
Installing the Maretron FPM100 involves the following steps. Please refer to the individual  
sections for additional details.  
1. Unpack the Box (Section 2.1)  
2. Choose a Mounting Location (Section 2.2)  
3. Mount the FPM100 (Section 2.3)  
4. Connect the FPM100 (Section 2.4)  
5. Configure or Program the Mode for each Channel (Section 3.1)  
6. For each channel in Pressure/Vacuum mode:  
o Set the channel’s instance (Section 3.2.1)  
o Set the channel’s source (Section 3.2.5)  
o Configure the Pressure at 4mA (Section 3.2.3)  
o Configure the Pressure at 20mA (Section 3.2.4)  
7. For each channel in Tank mode:  
o Configure or Program the Tank Type (Section 3.1)  
o Configure or Program the Tank Number (Section 3.3.6)  
o Configure or Program Tank Capacity (Section 3.3.4)  
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o Configure for Tank Depth and Shape  
ƒ Configure or Program the Tank Depth (Section 3.3.5.1)  
ƒ Custom Calibration (Section 3.3.5.2)  
1.6 Theory of Operation  
The FPM100 operates by measuring the current transmitted by pressure transducers.  
When you are using the FPM100 in conjunction with a pressure transducer to perform tank  
level measurement, it is important to understand the relationship of tank depth, the range of  
the pressure transducer, and the accuracy of the resulting tank level reading.  
1.6.1 Choosing a Pressure Transducer Mounting Location for Tank Level  
Measurement  
Choosing a proper mounting location for pressure transducers is critical to obtaining accurate  
tank level measurements. The pressure transducer should be mounted as close to the bottom  
of the tank as possible, as the pressure transducer will not be able to measure fluid levels  
below the pressure port on the transducer.  
1.6.2 Accuracy of Tank Level Measurement  
Maretron offers two pressure transducers that are suitable for indicating tank levels: a 0-3 PSI  
transducer and a 0-5 PSI transducer. For maximum accuracy, you should always use the  
transducer with the smallest range that is sufficient for your application.  
The accuracy of these transducers is specified to be ±2% full scale. However, if you are using  
a transducer to measure the level of a tank where you are using only a portion of that  
transducer’s range, the accuracy will be less than this. For example, if you are using a 0-3 PSI  
(0-0.21 bar) pressure transducer to measure a tank level of water in a 41.5” (1.05m) deep tank,  
the pressure measurements will vary over a range of 0 to 1.5PSI (0 to 0.10 bar) – only half the  
designed range of the pressure transducer. Therefore, the ±2% full scale accuracy  
specification of the transducer means that the accuracy of the transducer in this example will  
actually be ±4%. You can use the table in Figure 1 below to look up the depth of your tank and  
see the actual accuracy for either a 0-3 PSI (0-0.21 bar) transducer or a 0-5 PSI (0-0.34 bar)  
transducer.  
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Figure 1 - Graph of Transducer Accuracy vs. Tank Depth  
The pressure transducer you select must have sufficient range to measure the full height of the  
liquid column of a full tank. The table in Figure 2 below shows the maximum depth that can be  
sensed by each pressure transducer type. This table assumes that water level is being  
measured. The maximum depth of diesel fuel can that can be measured varies from these  
figures slightly depending on the density of the diesel fuel.  
Transducer  
Maximum tank depth  
PT-0-3PSI-01 (0-3 PSI)  
PT-0-5PSI-01 (0-5 PSI)  
83.04” (2.11m)  
138.4” (3.52m)  
Figure 2 - Pressure Transducer Selection Chart for Tank Level Applications  
2 Installation  
2.1 Unpacking the Box  
When unpacking the box containing the Maretron FPM100, you should find the following items:  
1 – FPM100 Fluid Pressure Monitor  
1 – Parts Bag containing 4 Stainless Steel Mounting Screws  
1 – FPM100 User’s Manual  
1 – Warranty Registration Card  
If any of these items are missing or damaged, please contact Maretron.  
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2.2 Choosing a Mounting Location  
Please consider the following when choosing a mounting location.  
1. The FPM100 is waterproof, so it can be mounted in a damp or dry location.  
2. The orientation is not important, so the FPM100 can be mounted on a horizontal deck,  
vertical bulkhead, or upside down if desired.  
3. The FPM100 is temperature-rated to 55°C (130°F), so it should be mounted away from  
engines or engine rooms where the operating temperature exceeds the specified limit.  
2.3 Mounting the FPM100  
Attach the FPM100 securely to the vessel using the included stainless steel mounting screws  
or other fasteners as shown in Figure 3 below. Do not use threadlocking compounds  
containing methacrylate ester, such as Loctite Red (271), as they will cause stress cracking of  
the plastic enclosure.  
Figure 3 – Mounting the FPM100  
2.4 Mounting the Pressure Transducer  
All pressure transducer accessories for the FPM100 are fitted with 1/4” NPT male threads.  
Some pressure transducers measure gage pressure (pressure above atmospheric). These  
transducers have a small plastic vent tube enclosed in the connecting cable. Special care must  
be taken not to block or kink the vent tube, and not to expose the vent tube to moisture.  
2.4.1 Pressure Measurement Applications  
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Keep in mind that the rated burst pressure of the pressure transducer is 2.4 to 3 times the  
maximum measurement pressure of the transducer. If the pressure transducer will experience  
pressure spikes in excess of the transducer’s maximum measurement pressure, use of a  
Pressure Snubber (PT-SNUB-01) accessory is highly recommended. The snubber will dampen  
pressure spikes that will be seen by the pressure transducer.  
Please refer to the installation instructions packaged with the pressure transducer accessory  
for detailed installation instructions for the transducer itself.  
2.4.2 Tank Level Measurement Applications  
The pressure transducer should be mounted to a properly sized fitting on the side of the tank  
as close as possible to the tank bottom. The pressure transducer cannot provide an accurate  
measurement when the fluid level is below the level of the pressure port of the pressure  
transducer. Please refer to Figure 4 below for an example of pressure transducer mounting on  
the side of the tank.  
Full Tank Depth  
Below Sensor Port, so  
Cannot be Measured  
Pressure Transducer  
Figure 4 – Fluid Level Measurement with Pressure Transducer  
It is highly recommended that a ball valve be mounted between the pressure transducer and  
the tank. This allows the pressure transducer to be serviced without draining the tank. Please  
refer to Figure 5 below for an example of the installed ball valve.  
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Tank Fitting  
Ball Valve  
Pressure Transducer  
Figure 5 - Tank Mounting of the Pressure Transducer with Recommended Ball Value  
The FPM100 requires two types of electrical connections: 1) the NMEA 2000® connection  
(refer to Section 2.5.1), and 2) the pressure transducer connections, which are described in  
Section 2.5.2.  
2.5.1 NMEA 2000® Connection  
The NMEA 2000® connector can be found on the side of the enclosure. The NMEA 2000®  
connector is a round five pin male connector (see Figure 6). You connect the FPM100 to an  
NMEA 2000® network using a Maretron NMEA 2000® cable (or an NMEA 2000® compatible  
cable) by connecting the female end of the cable to the FPM100 (note the key on the male  
connector and keyway on the female connector). Be sure the cable is connected securely and  
that the collar on the cable connector is tightened firmly. Connect the other end of the cable  
(male) to the NMEA 2000® network in the same manner. The FPM100 is designed such that  
you can plug or unplug it from an NMEA 2000® network while the power to the network is  
connected or disconnected. Please follow recommended practices for installing NMEA 2000®  
network products.  
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Figure 6 – NMEA 2000® Connector Face Views  
2.5.2 Pressure Transducer Connections  
The FPM100 pressure transducer connections are made by connecting to the 12-pin terminal  
strip on the top of the unit. First, remove the four screws at the corners of the unit detaching  
the splash guard from the unit. On the bottom of the splash guard, you will find a label  
detailing the wire connection to pin number assignments, which are repeated in the table  
below.  
Pin #  
1
Signal Name  
P0+  
Connection  
Pressure Transducer 0 (positive terminal)  
Pressure Transducer 0 (negative terminal)  
Pressure Transducer 1 (positive terminal)  
Pressure Transducer 1 (negative terminal)  
Pressure Transducer 2 (positive terminal)  
Pressure Transducer 2 (negative terminal)  
Pressure Transducer 3 (positive terminal)  
Pressure Transducer 3 (negative terminal)  
Pressure Transducer 4 (positive terminal)  
Pressure Transducer 4 (negative terminal)  
Pressure Transducer 5 (positive terminal)  
Pressure Transducer 5 (negative terminal)  
2
3
4
5
6
7
8
9
P0-  
P1+  
P1-  
P2+  
P2-  
P3+  
P3-  
P4+  
10  
11  
12  
P4-  
P5+  
P5-  
Please refer to Figure 7 for connecting the FPM100 to a pressure transducer. This figure  
shows the connection of the pressure transducer to channel 0 via the terminals named P0+  
and P0-. Connections to other channels are similar.  
Pressure Transducer  
FPM100 Screw Terminals  
1
2
3
4
5
6
7
8
9 10 11 12  
Figure 7 – Pressure Transducer Connection Diagram  
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3 Configuring the FPM100  
The FPM100 has several configurable parameters, which are shown below including the  
default values. If you are not using the default values, then you will need to refer to the  
corresponding section for configuring the FPM100 appropriately.  
1. Channel Mode (Section 3.1)  
2. Pressure/Vacuum Mode Configuration  
a. Instance (Section 3.2.1)  
b. Label (Section 3.2.2)  
c. Pressure at 4mA (Section 3.2.3)  
d. Pressure at 20mA (Section 3.2.4)  
e. Source (Section 3.2.5)  
f. Data Damping Period (Section 3.2.6)  
3. Tank Mode Configuration (Section 3.3)  
a. Label (Section 3.3.1)  
b. Pressure at 4mA (Section 3.3.2)  
c. Pressure at 20mA (Section 3.3.3)  
d. Tank Capacity (Section 3.3.4) – Default is No Tank Capacity Transmitted  
e. Tank Depth or Custom Calibration (Section 3.3.5)  
f. Data Damping Period (Section 3.3.8) – Default is 15 seconds  
g. Tank Type (Section 3.1) – Default is Fuel  
h. Tank Number (Section 3.3.6) – Default is Tank 0  
3.1 Configuring Channel Mode  
The FPM100 has 6 individually configurable channels. Each channel can be programmed to  
operate in one of three modes:  
1. Pressure/Vacuum Mode – In this mode, the FPM100 measures and transmits  
pressure and/or vacuum directly over the NMEA 2000 network  
2. Tank Mode – In this mode, the FPM100 measures pressure and uses information  
about the tank dimensions and the type of fluid in the tank to calculate a tank level,  
which is transmitted over the NMEA 2000 network  
3. Disable – The channel is disabled and transmits no data over the NMEA 2000 network  
The Disable mode requires no configuration. The following sections describe in detail the  
configuration of an FPM100 channel for Pressure/Vacuum Mode and in Tank Mode.  
3.2 Configuring a Channel in Pressure/Vacuum Mode  
The following sections describe the parameters that are available for configuration for a  
channel which has been set to Pressure/Vacuum mode.  
3.2.1 Configuring Instance  
Program this parameter to match the desired instance number of the pressure reading for this  
channel. You can program this parameter to any value between 0 and 252.  
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3.2.2 Configuring Label  
Program this parameter with a text string which identifies the particular parameter being  
monitored by this channel. Maretron display products will display this label text when you are  
selecting data to display.  
3.2.3 Configuring Pressure at 4mA  
Program this parameter to match the pressure reading of the pressure transducer when it is  
sourcing a current of 4mA. You can determine this value by examining the specification of the  
pressure transducer being used.  
3.2.4 Configuring Pressure at 20mA  
Program this parameter to match the pressure reading of the pressure transducer when it is  
sourcing a current of 20mA. You can determine this value by examining the specification of the  
pressure transducer being used.  
3.2.5 Configuring Source  
You can configure a “Source” descriptor to be transmitted with the pressure reading which is  
used to provide an indication of the source of the pressure data for this channel. Choices are  
as follows:  
1. Water Pressure  
2. Atmospheric Pressure  
3. Compressed Air Pressure  
4. Hydraulic Pressure  
5. Steam Pressure  
6. 16 User Defined pressure sources (User Defined 129 – User  
Defined 144)  
3.2.6 Configuring Data Damping Period  
You can configure a damping parameter to smooth the pressure readings or make them more  
responsive. The data damping is configurable between 0.2-25.0 seconds. The default data  
damping for a channel in Pressure/Vacuum mode is 3.0 seconds.  
3.3 Configuring a Channel in Tank Mode  
The following sections describe the parameters that are available for configuration for a  
channel which has been set to Tank mode.  
3.3.1 Configuring Label  
Program this parameter with a text string which identifies the particular parameter being  
monitored by this channel. Maretron display products will display this label text when you are  
selecting data to display.  
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3.3.2 Configuring Pressure at 4mA  
Program this parameter to match the pressure reading of the pressure transducer when it is  
sourcing a current of 4mA. You can determine this value by examining the specification of the  
pressure transducer being used.  
3.3.3 Configuring Pressure at 20mA  
Program this parameter to match the pressure reading of the pressure transducer when it is  
sourcing a current of 20mA. You can determine this value by examining the specification of the  
pressure transducer being used.  
3.3.4 Configuring Tank Capacity  
In addition to indicating the fluid level within a tank, the FPM100 also has the ability to be  
configured or programmed with the attached tank’s capacity. This way, you will be able to view  
the tank’s capacity as well as the amount of liquid remaining anywhere on the vessel where  
there is an NMEA 2000® compatible display. It is not required, but you can enter the FPM100  
tank capacity using a display product such as the Maretron DSM250. Refer to the user’s  
manual of the particular product that will be used for configuring the FPM100 as these manuals  
provide detailed instruction on configuration procedures.  
3.3.5 Tank Levels Calibration  
The FPM100 can be easily programmed for use with tanks of rectangular cross-section (see  
Section 3.3.5.1). For non-rectangular tank shapes, you can perform custom calibration so that  
the FPM100 accurately reflects fluid levels (see Section 3.3.5.2).  
3.3.5.1 Rectangular Tank  
3.3.5.1.1 Empty Tank Depth  
This field should be programmed with the depth of the liquid column above the pressure  
transducer when the tank is empty. If the transducer is installed directly in the tank, then this  
value will normally be programmed to 0”. If the transducer is actually installed below the level  
of the tank bottom, then this value should be programmed to the vertical distance between the  
tank bottom and the pressure port on the pressure transducer.  
3.3.5.1.2 Full Tank Depth  
This field should be programmed with the depth of the liquid column above the pressure  
transducer when the tank is full.  
Please refer to Figure 8 below for an illustration of Full Tank Depth and Empty Tank Depth  
parameters.  
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Full Tank Depth  
Empty Tank Depth  
Figure 8 – Empty Tank Depth and Full Tank Depth Parameters  
3.3.5.1.3 Fluid Density  
In order for the FPM100 to properly convert pressure readings to tank levels using a  
rectangular tank calibration, it must be configured with the density of the fluid being monitored.  
The default value for this parameter is the density of fresh water (1000 kg/m3). If you are  
monitoring the level of fluids other than water, you must program this parameter with the  
density of the fluid being monitored.  
The density of Marine Diesel Fuel is approximately 991 kg/m3. This value may vary depending  
on the exact fuel formulation.  
3.3.5.2 Custom Calibration  
For accurate tank level readings, the FPM100 must be custom calibrated if the tank shape is  
irregular or non-rectangular.  
You can calibrate the FPM100 using a display product such as the Maretron DSM250. Refer to  
the user’s manual of the particular product that will be used for configuring the FPM100 as  
these manuals provide detailed instruction on configuration procedures.  
3.3.6 Configuring Tank Number  
As shipped from the factory, the FPM100 transmits the Tank Number as “0”. The FPM100  
supports up to sixteen tanks (0 through 15) for a given type of tank, which means you can  
monitor up to 16 separate fuel tanks or 16 separate fresh water tanks. The FPM100 is  
configured or programmed by choosing a FPM100 tank number using a display product such  
as the Maretron DSM250. Refer to the user’s manual of the particular product that will be used  
for configuring the FPM100 as these manuals provide detailed instruction on configuration  
procedures.  
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3.3.7 Configuring Tank Type  
As shipped from the factory, the FPM100 transmits the tank type as “Fuel”. You can  
reconfigure the FPM100 for any of these tank types:  
1. Fuel  
2. Fresh Water  
3. Waste Water  
4. Live Well  
5. Oil  
6. Black Water  
7. Reserved-1 through Reserved-7 (if none of the above types apply)  
You configure or program a FPM100 tank type using a display product such as the Maretron  
DSM250. Refer to the user’s manual of the particular product that will be used for configuring  
the FPM100 as these manuals provide detailed instruction on configuration procedures.  
3.3.8 Configuring Data Damping Period  
You can configure a damping parameter to smooth the tank level readings or make them more  
responsive. The data damping is configurable between 0.2-25.0 seconds. The default data  
damping for a channel in Tank mode is 15.0 seconds.  
4 Maintenance  
Regular maintenance is not required; however, an occasional inspection will ensure continued  
proper operation of the Maretron FPM100. Perform the following tasks periodically:  
Clean the unit with a soft cloth. Do not use chemical cleaners as they may remove  
paint or markings or may corrode the FPM100 enclosure or seals. Do not use any  
cleaners containing acetone, as they will deteriorate the plastic enclosure.  
Ensure that the unit is mounted securely and cannot be moved relative to the mounting  
surface. If the unit is loose, tighten the screws holding the cable ties.  
Check the security of the cable connected to the NMEA 2000® interface and tighten if  
necessary.  
Check the security of all of the pressure transducer connections on the top of the unit  
and tighten if necessary.  
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5 Troubleshooting  
If you notice unexpected operation of the Maretron FPM100, follow the troubleshooting  
procedures in this section to remedy simple problems.  
Symptom  
No Pressure  
data visible on  
NMEA 2000®  
network.  
Troubleshooting Procedure  
1. Ensure that the FPM100 is properly connected to the NMEA 2000®  
network.  
2. Ensure that pressure transducers are properly connected to the  
FPM100.  
3. Ensure that each channel that you wish to monitor is configured as  
“Pressure/Vacuum”and that instance numbers are configured  
correctly.  
4. Ensure that the FPM100 has the appropriate NMEA 2000 PGNs  
enabled.  
Inaccurate  
pressure output  
1. Ensure that the “Pressure at 4mA” and “Pressure at 20mA”  
configuration items are set to appropriate values for the pressure  
transducer.  
2. Check that the vent tube from the pressure transducer (only present  
on some transducers) is not kinked or blocked.  
3. Remove the pressure transducer from the tank opening and ensure  
that the pressure port on the transducer is not clogged.  
1. If operating in the NMEA 2000® Mode, check the connection to the  
NMEA 2000® interface (see Section 2.5.1) and tighten if necessary.  
2. Ensure that power is supplied to the NMEA 2000® network. Proper  
network power can be checked by measuring the voltage at an open  
tee between NET-S and NET-C. The voltage should be between 9 and  
16 volts.  
No Tank Level  
data visible on  
NMEA 2000®  
network.  
3. Ensure that both trunk line terminators are in place. Proper network  
termination can be checked by removing network power and  
measuring the resistance at an open tee between NET-L and NET-H  
signals. The resistance should read approximately 60 ohms (two 120  
ohm terminators in parallel equals 60 ohms).  
Inaccurate tank 1. If operating with a rectangular tank, ensure that the tank depth is  
level output  
programmed properly (see Section Error! Reference source not  
found.).  
2. If using custom calibration, re-calibrate the FPM100 (see Section  
3.3.5.2).  
3. Check that the vent tube from the pressure transducer is not kinked or  
blocked.  
4. Remove the pressure transducer from the tank opening and ensure  
that the pressure port on the transducer is not clogged.  
1. Ensure that the “Pressure at 4mA” and “Pressure at 20mA”  
configuration items are set to appropriate values for the pressure  
transducer.  
Zero pressure  
readings when  
pressurized  
2. Check the cable connection to the pressure transducer to see whether  
a wire has become loose, or the cable has been cut.  
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Figure 9 – Troubleshooting Guide  
If these steps do not solve your problem, please contact Maretron Technical Support (refer to  
Section 7 for contact information).  
6 Technical Specifications  
Specifications (Tank Level Mode)  
Parameter  
Value  
Comment  
Accuracy  
+/-1% FS  
Exclusive of Pressure Transducer  
Resolution  
+/-0.33% FS Over Full Pressure Transducer Range  
Number of Tank Types  
Number of Tanks per Tank Type  
Support for Irregularly Shaped  
Tanks  
16  
16  
Yes  
Fuel, Fresh Water, Waste water, Live well, Oil, etc.  
16 Tanks per Tank Type Numbered 0-15  
Can be Calibrated for any Shape Tank  
Programmable Tank Capacity  
Yes  
Allows Displays to Calculate Amount Remaining  
Specifications (Pressure/Vacuum Mode)  
Parameter  
Value  
Comment  
Accuracy  
+/-1% FS  
Exclusive of Pressure Transducer  
Resolution  
+/-0.33% FS Over Full Pressure Transducer Range  
Number of Pressure Source Types  
21 Water Pressure, Atmospheric Pressure, Compressed Air  
Pressure, Hydraulic Pressure, Steam Pressure, 16 User  
Defined Sources  
Certifications  
Parameter  
Comment  
NMEA 2000  
Level A  
Maritime Navigation and Radiocommunication Equipment & Systems  
Maritime Navigation and Radiocommunication Equipment & Systems  
FCC and CE Mark  
IEC 61162-3  
Tested to IEC 60945  
Electromagnetic Compatibility  
NMEA 2000® Parameter Group Numbers (PGNs) - See Appendix A for Details  
Description  
PGN #  
PGN Name  
Default Rate  
Periodic Data PGNs  
127505 Fluid Level  
130314 Actual Pressure  
0.4 Times/Second  
0.5 Times/Second  
Response to Requested PGNs  
Protocol PGNs  
126464 PGN List (Transmit and Receive)  
126996 Product Information  
126998 Configuration Information  
059392 ISO Acknowledge  
059904 ISO Request  
060928 ISO Address Claim  
065240 ISO Address Command  
126208 NMEA  
N/A  
N/A  
N/A  
N/A  
N/A  
N/A  
N/A  
N/A  
N/A  
Maretron Proprietary PGNs  
128720 Configuration  
Revision 1.3  
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FPM100 User’s Manual  
Electrical  
Parameter  
Value  
9 to 32 Volts  
400mA  
8
Comment  
Operating Voltage  
DC Voltage  
Power Consumption  
Load Equivalence Number (LEN)  
Reverse Battery Protection  
Load Dump Protection  
Maximum Current Drain  
NMEA 2000® Spec. (1LEN = 50mA)  
Indefinitely  
Yes  
Yes  
Energy Rated per SAE J1113  
Mechanical  
Parameter  
Size  
Value  
3.50” x 4.20” x 2.03”  
Comment  
Including Flanges for Mounting  
(88.9mm x 106.7mm x 51.6mm)  
Weight  
13 oz. (368.5 g)  
Environmental  
Parameter  
Value  
Exposed  
IP64  
IEC 60945 Classification  
Degree of Protection  
Operating Temperature  
Storage Temperature  
Relative Humidity  
-25°C to 55°C  
-40°C to 70°C  
93%RH @40° per IEC60945-8.2  
Vibration  
Solar Radiation  
2-13.2Hz @ ±1mm, 13.2-100Hz @ 7m/s2 per IEC 60945-8.7  
Ultraviolet B, A, Visible, and Infrared per IEC 60945-8.10  
Corrosion (Salt Mist)  
Electromagnetic Emission  
Electromagnetic Immunity  
Safety Precautions  
4 times 7days @ 40°C, 95%RH after 2 hour Salt Spray Per IEC 60945-8.12  
Conducted and Radiated Emission per IEC 60945-9  
Conducted, Radiated, Supply, and ESD per IEC 60945-10  
Dangerous Voltage, Electromagnetic Radio Frequency per IEC 60945-12  
7 Technical Support  
If you require technical support for Maretron products, you can reach us in any of the following  
ways:  
Telephone: 1-866-550-9100  
Fax: 1-602-861-1777  
Mail: Maretron, LLP  
Attn: Technical Support  
9014 N. 23rd Ave Suite 10  
Phoenix, AZ 85021 USA  
Page 16  
Revision 1.3  
   
®
8 Installation Template  
Please check the dimensions before using the following diagram as a template for drilling the  
mounting holes because the printing process may have distorted the dimensions.  
Figure 10 – Mounting Surface Template  
Revision 1.3  
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FPM100 User’s Manual  
9 Maretron (2 Year) Limited Warranty  
Maretron warrants the FPM100 to be free from defects in materials and workmanship for two (2) years from the  
date of original purchase. If within the applicable period any such products shall be proved to Maretron’s  
satisfaction to fail to meet the above limited warranty, such products shall be repaired or replaced at Maretron’s  
option. Purchaser's exclusive remedy and Maretron’s sole obligation hereunder, provided product is returned  
pursuant to the return requirements below, shall be limited to the repair or replacement, at Maretron’s option, of  
any product not meeting the above limited warranty and which is returned to Maretron; or if Maretron is unable to  
deliver a replacement that is free from defects in materials or workmanship, Purchaser’s payment for such  
product will be refunded. Maretron assumes no liability whatsoever for expenses of removing any defective  
product or part or for installing the repaired product or part or a replacement therefore or for any loss or damage  
to equipment in connection with which Maretron’s products or parts shall be used. With respect to products not  
manufactured by Maretron, Maretron’s warranty obligation shall in all respects conform to and be limited to the  
warranty actually extended to Maretron by its supplier. The foregoing warranties shall not apply with respect to  
products subjected to negligence, misuse, misapplication, accident, damages by circumstances beyond  
Maretron’s control, to improper installation, operation, maintenance, or storage, or to other than normal use or  
service.  
THE FOREGOING WARRANTIES ARE EXPRESSLY IN LIEU OF AND EXCLUDES ALL OTHER EXPRESS OR  
IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF  
MERCHANTABILITY AND OF FITNESS FOR A PARTICULAR PURPOSE.  
Statements made by any person, including representatives of Maretron, which are inconsistent or in conflict with  
the terms of this Limited Warranty, shall not be binding upon Maretron unless reduced to writing and approved by  
an officer of Maretron.  
IN NO CASE WILL MARETRON BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, DAMAGES  
FOR LOSS OF USE, LOSS OF ANTICIPATED PROFITS OR SAVINGS, OR ANY OTHER LOSS INCURRED  
BECAUSE OF INTERRUPTION OF SERVICE. IN NO EVENT SHALL MARETRON’S AGGREGATE LIABILITY  
EXCEED THE PURCHASE PRICE OF THE PRODUCT(S) INVOLVED. MARETRON SHALL NOT BE SUBJECT  
TO ANY OTHER OBLIGATIONS OR LIABILITIES, WHETHER ARISING OUT OF BREACH OF CONTRACT OR  
WARRANTY, TORT (INCLUDING NEGLIGENCE), OR OTHER THEORIES OF LAW WITH RESPECT TO  
PRODUCTS SOLD OR SERVICES RENDERED BY MARETRON, OR ANY UNDERTAKINGS, ACTS OR  
OMISSIONS RELATING THERETO.  
Maretron does not warrant that the functions contained in any software programs or products will meet  
purchaser’s requirements or that the operation of the software programs or products will be uninterrupted or error  
free. Purchaser assumes responsibility for the selection of the software programs or products to achieve the  
intended results, and for the installation, use and results obtained from said programs or products. No  
specifications, samples, descriptions, or illustrations provided Maretron to Purchaser, whether directly, in trade  
literature, brochures or other documentation shall be construed as warranties of any kind, and any failure to conform  
with such specifications, samples, descriptions, or illustrations shall not constitute any breach of Maretron’s limited  
warranty.  
Warranty Return Procedure:  
To apply for warranty claims, contact Maretron or one of its dealers to describe the problem and determine the  
appropriate course of action. If a return is necessary, place the product in its original packaging together with  
proof of purchase and send to an Authorized Maretron Service Location. You are responsible for all shipping and  
insurance charges. Maretron will return the replaced or repaired product with all shipping and handling prepaid  
except for requests requiring expedited shipping (i.e. overnight shipments). Failure to follow this warranty return  
procedure could result in the product’s warranty becoming null and void.  
Maretron reserves the right to modify or replace, at its sole discretion, without prior notification, the warranty listed  
above. To obtain a copy of the then current warranty policy, please go to the following web page:  
Page 18  
Revision 1.3  
 
®
Appendix A – NMEA 2000® Interfacing  
FPM100 NMEA 2000® Periodic Data Transmitted PGNs  
PGN 130314 – Actual Pressure  
The FPM100 uses this PGN to provide a regular transmission of various pressures. The  
factory default for periodic transmission rate is once every two seconds. The transmission of  
this PGN can be disabled (see PGN 126208 – NMEA Request Group Function – Transmission  
Periodic Rate).  
Field 1:SID – The sequence identifier field is used to tie related PGNs together. For example,  
the FPM100 will transmit identical SIDs for 130312 (Temperature) and 130311  
(Environmental Parameters) to indicate that the readings are linked together (i.e.,  
the data from each PGN was taken at the same time although they are reported at  
slightly different times).  
2: Pressure Instance – The FPM100 sets this field to identify a particular pressure  
measurement from the source specified in Field 3. Every pressure measurement  
from a given source type on the network should have a distinct instance value, so  
that monitoring devices and displays can identify which measurement is which.  
3: Pressure Source – This field is used to indicate the type of pressure measurement  
being taken. Possible values for this field include Atmospheric Pressure, Water  
Pressure, Steam Pressure, Compressed Air Pressure, Hydraulic Pressure, and 16  
User Defined pressure sources.  
4: Pressure – This field is used to indicate the pressure, whose source is specified in  
field 2, in units of 0.1 Pa.  
6: Reserved bits – The FPM100 sets all bits in this field to a value of “1”.  
PGN 127505 – Fluid Level  
The FPM100 uses this PGN to indicate the attached tank’s fluid instance, fluid type, fluid level,  
and tank capacity.  
Field 1: Fluid Instance – This field is used to identify the tank number and ranges between 0  
and 15. There can be up to 16 tanks of a given type as defined by the Fluid Type  
field. This field is programmable through the NMEA command PGN. The FPM100  
ships from the factory with a default value of zero.  
2: Fluid Type – This field identifies the type of fluid contained within the tank. Currently  
the defined fluid types are fuel, fresh water, wastewater, live well, oil, and black  
water. This field is programmable through the NMEA command PGN. The FPM100  
ships from the factory with a default value of 0x0 indicating “Fuel”.  
3: Fluid Level – This field is used to indicate the current fluid level in percentage. The  
value transmitted in this field depends on the distance from the sender to the top of  
the fluid or tank bottom.  
4: Tank Capacity – This field is used to indicate the tank capacity. This field is  
programmable through the NMEA command PGN. The FPM100 ships from the  
factory with a default value of 0xFFFFFFFF indicating “Data Not Available”.  
5: Reserved – This field is reserved by NMEA; therefore, the FPM100 sets all bits to a  
logic 1.  
Revision 1.3  
Appendix A – NMEA 2000® Interfacing  
Page A1  

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