Maretron Computer Monitor TLM100 User Manual

®
TLM100  
Tank Level Monitor  
Users Manual  
Revision 1.3  
Copyright © 2010 Maretron, LLP All Rights Reserved  
Maretron, LLP  
9014 N. 23rd Ave #10  
Phoenix, AZ 85021  
Maretron Manual Part #: M002201  
Revision 1.3  
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Table of Contents  
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TLM100 User’s Manual  
Table of Figures  
Figure 2 – TLM100 Mounting – SAE 5-Hole Bolt Pattern .......................................................... 6  
Figure 3 – Mounting TLM100 to SAE 5-Hole Tank with Focus Tube......................................... 7  
Figure 4 – TLM100 Mounting With Threaded Adapter............................................................... 8  
Figure 5 – Mounting TLM100 with Focus Tube on Threaded Tank Fitting................................. 9  
Figure 7 – NMEA 2000® Connector Face Views ..................................................................... 10  
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 Tank Level Monitor (TLM100). Maretron has  
designed and built your monitor to the highest standards for years of reliable, dependable, and  
accurate service.  
The TLM100 is used to sense levels of liquid tanks using ultrasonic technology and transmit  
the liquid levels over the NMEA 2000® network. This allows you to observe tank levels  
anywhere on the vessel where there is an NMEA 2000® compatible display such as the  
Maretron DSM250. The TLM100 is capable of sensing tanks up to 40” (1.02m) in depth. It can  
be used for diesel, fresh water, grey water, black water, and oil tanks. Unlike most tank  
senders that only work with rectangular tanks, the TLM100 can be calibrated for irregular tank  
shapes so you know the true level of your tanks. The TLM100 can be mounted on tanks with a  
SAE J1810 5-hole mounting pattern, or to tanks using 1.5” NPT or 1.25” BSP threaded  
openings via available adapters. The TLM100 has an optional airlock for black water  
applications to keep the face of the ultrasonic transmitter from fouling, and an optional focus  
tube to allow use on boats with planing hulls when the vessel spends a significant amount of  
time with the bow pitched up.  
The Maretron TLM100 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 TLM100 in order to  
ensure optimal performance.  
1.2 Gasoline Tanks  
The TLM100 is NOT intended for use in tanks containing gasoline. Use in tanks containing  
gasoline will void the product warranty. For gasoline tank applications, please use the  
Maretron TLM100 Gasoline Tank Level Monitor.  
1.3 Firmware Revision  
This manual corresponds to TLM100 firmware revision 1.1.5.  
1.4 Features  
The Maretron TLM100 has the following features:  
Transmits liquid levels over an NMEA 2000® Interface  
Integrated ultrasonic level sensor  
Can be used in tanks up to 40” (1.02m) deep  
SAE J1810 5-hole, 1.5” NPT, or 1.25” BSP Mounting  
Accommodates Irregularly Shaped Tanks with 16 Point Calibration  
16 Programmable Tank Types Including Fuel, Fresh Water, Waste Water, Live Well  
Programmable Tank Number(s) Up to 16 per Tank Type  
Programmable Tank Capacity  
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1.5 TLM100 Accessories  
Maretron offers the following accessories for the TLM100:  
TA-5H-1.5NPT  
TA-5H-1.25BSP  
TFT-5H  
TFT-1.5NPT  
TFT-1.25BSP  
TAL-5H  
1.5” NPT Displacement Hull Tank Adapter  
1.25” BSP Displacement Hull Tank Adapter  
SAE 5-Bolt Pattern Non-Displacement Hull Focus Tube  
1.5” NPT Non-Displacement Hull Focus Tube  
1.25” BSP Non-Displacement Hull Focus Tube  
SAE 5-Bolt Pattern Black Water Airlock  
1.5” NPT Black Water Airlock  
TAL-1.5NPT  
TAL-1.25BSP  
1.25” BSP Black Water Airlock  
1.6 Quick Install  
Installing the Maretron TLM100 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 2.3)  
3. Mount the TLM100 (Section 2.4)  
4. Connect the TLM100 (Section 2.5)  
5. Configure or Program the Tank Type (Section 3.1)  
6. Configure or Program the Tank Number (Section 3.2)  
7. Configure or Program Tank Capacity (Section 3.3)  
8. Configure for Tank Depth and Shape  
o Configure or Program the Tank Depth (Section 3.4.1)  
o Custom Calibration (Section 3.4.2)  
2 Installation  
2.1 Unpacking the Box  
When unpacking the box containing the Maretron TLM100, you should find the following items:  
1 – TLM100 Tank Level Monitor  
1 – TLM100 Gasket  
1 – TLM100 User’s Manual  
1 – Warranty Registration Card  
If any of these items are missing or damaged, please contact Maretron.  
2.2 Theory of Operation  
The TLM100 operates by directing a pulse of ultrasonic sound from the sensor component at  
the top of the tank down to the surface of the liquid in the tank. The TLM100 then measures  
the time it takes this pulse to travel down to the surface of the liquid, be reflected back up, and  
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then be received back at the sensor component. Using the speed of sound, it uses this time to  
calculate the distance between the face of the sensor component and the surface of the liquid  
(or the tank bottom if the tank is empty). The cone width of the beam transmitted by the  
TLM100 sensor component is 6°. Please refer to Figure 1 below for a diagram of the waves  
emitted and received by the TLM100.  
Please note that due to limitations of ultrasonic technology, the minimum depth that can be  
measured by the TLM100 is 2” (5.08cm).  
Figure 1 - TLM100 Operation  
2.3 Choosing a Mounting Location  
The primary function of the TLM100 is to sense levels of liquid in tanks using ultrasonic  
technology and transmit this information over NMEA 2000® network so that tank level  
information can be viewed anywhere on the vessel where there is an NMEA 2000® compatible  
display.  
The TLM100 tank level monitor consists of two parts: 1) the sensor, which mounts onto the top  
of the tank and contains the ultrasonic level measurement components, and 2) the interface,  
which converts the measured data into NMEA 2000® format and transmits the data over the  
NMEA 2000® network.  
The interface component of the TLM100 may be mounted anywhere, subject to the length of  
the cable connecting it to the sensor component.  
The sensor component of the TLM100 must be mounted on the tank whose level is to be  
monitored. Choosing a proper mounting location for the sensor component of the TLM100 is  
critical to obtaining accurate tank level readings. For best results, please follow these  
recommendations:  
The sensor component of the TLM100 must be mounted flat, so that the round  
transceiver portion of the TLM100 faces straight downward.  
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The sensor component of the TLM100 must be mounted over the deepest part of  
the tank, in order to obtain accurate depth readings when the tank is empty or  
near empty.  
In order to obtain accurate readings when the tank is empty, the tank bottom  
directly under the TLM100 must be both smooth and flat, so that the ultrasonic  
sound waves transmitted by the sender are reflected back to the sender for  
measurement. If the tank bottom under the TLM100 is sloped, grooved, or rough,  
then the TLM100 may not report an accurate level reading (or any level reading  
at all) when the tank is empty.  
The area below the sensor component of the TLM100 must be free of obstruction  
from tank baffles or return lines that might reflect ultrasonic waves back towards  
the sensor component, causing inaccurate depth readings.  
The sensor component of the TLM100 must be mounted away from the tank  
walls, so that reflections from the tank walls do not cause inaccurate depth  
readings.  
For a flat bottom tank, the mounting hole in the top of the tank through which the  
TLM100 measures fluid level should be located as close to the center of the tank,  
both front-to-back and side-to-side, as possible. This will ensure maximum  
accuracy of reading in the event that the vessel experiences pitch and roll.  
2.3.1 Effect of Pitch and Roll on the TLM100  
Assuming that the TLM100 sensor component is mounted on a flat tank top, the TLM100 will  
operate correctly as long as the vessel does not experience pitch and/or roll in excess of 6° for  
an extended period of time. This can occur on a sailboat when the boat is heeled over, or on a  
powerboat with a non-displacement (planing) hull. Temporary pitch and roll due to wave  
motion and will not adversely affect tank level readings.  
If you are in a sailing vessel or a powerboat with a non-displacement hull and will experience  
pitch and/or roll in excess of 6° for an extended period of time, you can install a Non-  
Displacement Hull Focus Tube below the sensor (please refer to Section 1.5 on page 2 for  
ordering information). This is a tube which mounts into the tank before the sensor and directs  
the ultrasonic waves down to the surface of the liquid and back. With a focus tube, the  
TLM100 will operate correctly as long as the vessel does not exceed 15° of pitch and/or roll for  
extended periods of time.  
2.3.2 Use of an Airlock on Black Water Tanks  
Maretron highly recommends the use of an airlock (please refer to Section 1.5 for information  
on available airlocks) in black water tank applications. Use of an airlock will prevent the face of  
the ultrasonic transducer from becoming fouled with tank contents, but will limit the minimum  
depth that the TLM100 can sense to the depth of the airlock component, as the liquid will not  
rise above the bottom of the airlock.  
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2.4 Mounting the TLM100  
2.4.1 Mounting the TLM100 Sensor Component  
The TLM100 comes from the factory ready to mount on a tank with the standard SAE J1810 5-  
Hole mounting pattern. Maretron offers adapters to allow mounting the TLM100 on a tank with  
a 1.5” NPT connection or a 1.25” BSP connection.  
WARNING  
Gasket installs only one way and must be properly aligned to the  
tank and sensor for proper operation  
Use only supplied gasket – other gaskets may obstruct and  
render device inoperative – do not use silicone sealant around  
the gasket  
Use only Maretron adapters – others may have wrong diameter,  
rendering device inoperative  
Tank must have no obstructions within 6° beam angle (for  
example baffles, clean outs, fill or vent pipes  
Tighten the bolts mounting the TLM100 to a torque of 10-15 in-lbs  
(1.1-1.7 N·m). Over torquing the mounting bolts can result in  
erratic or inaccurate depth readings  
2.4.1.1 Installation on a Tank with a SAE J1810 5-Bolt Fitting  
To install the TLM100 on a tank with a SAE J1850 5-bolt fitting, place the gasket over the tank  
fitting so that the bolt holes line up (WARNING – the gasket must be properly aligned; it only  
fits one way). Place the TLM100 sensor component over the gasket so that the bolt holes line  
up. Insert the mounting bolts through the TLM100 sensor component and gasket into the tank  
fitting (the tank fitting may instead have studs installed, so in this case, install the nuts over the  
studs), and tighten them to a torque of 10-15 in-lbs (1.1-1.7 N·m). Do not use threadlocking  
compounds containing methacrylate ester, such as Loctite Red (271), as they will cause stress  
cracking of the plastic enclosure.  
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Mounting Screws (x5)  
TLM100 Sensor Component  
TLM100 Gasket  
SAE 5-Bolt Tank Fitting  
TLM100 Interface Component  
Figure 2 – TLM100 Mounting – SAE 5-Hole Bolt Pattern  
2.4.1.2 Installation on a Tank with a SAE J1810 5-Bolt Fitting and Focus Tube  
If a focus tube is used for a tank with a SAE J1810 5-bolt fitting, determine the depth of the  
tank at the location of the tank sensor mounting hole and use a saw with a metal-cutting blade  
to trim the focus tube so that it reaches 1” above the tank bottom when mounted. Remove any  
burrs from the end of the focus tube after trimming.  
Next, place the gasket included with the focus tube over the focus tube (between the focus  
tube flange and the tank mounting flange), and then drop the focus tube into the hole so that  
the bolt holes on the focus tube, focus tube gasket, and tank fitting all line up (WARNING – the  
gasket must be properly aligned; it only fits one way).  
Place the gasket included with the TLM100 over the focus tube so that the bolt holes line up  
(WARNING – the gasket must be properly aligned; it only fits one way), then place the TLM100  
sensor component on top of the TLM100 gasket so that the bolt holes line up.  
Insert mounting screws into the bolt holes on the TLM100 sensor component, and thread them  
into the tank fitting (the tank fitting may instead have studs installed, so in this case, install the  
nuts over the studs), tightening them to a torque of 10-15 in-lbs (1.1-1.7 N·m). Do not use  
threadlocking compounds containing methacrylate ester, such as Loctite Red (271), as they  
will cause stress cracking of the plastic enclosure.  
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Mounting Screws (x5)  
TLM100 Sensor Component  
TLM100 Gasket  
Focus Tube  
Focus Tube Gasket  
SAE 5-Bolt Tank Fitting  
TLM100 Interface Component  
1” (2.54cm) clearance  
between focus tube and  
tank bottom  
Figure 3 – Mounting TLM100 to SAE 5-Hole Tank with Focus Tube  
2.4.1.3 Installation on a Tank with a SAE J1810 5-Bolt Fitting and Airlock  
Installation of the TLM100 on a tank with a SAE J1810 5-bolt fitting with an airlock is identical  
to installation with a focus tube, except that the trimming step is eliminated. Please refer to  
Section 0 for details of the mounting procedure.  
2.4.1.4 Installation on a Tank with a 1.25”BSP or 1.5”NPT Threaded Tank Fitting  
For a threaded tank sender mounting hole, first thread the adapter into the tank opening and  
tighten to a torque of 3-5 ft-lbs (4.1-6.8 N·m).  
Next, place the TLM100 gasket over the adapter so that the bolt holes on the gasket line up  
with the bolt holes on the adapter (WARNING – the gasket must be properly aligned; it only fits  
one way). Place the TLM100 sensor component on top of the adapter so that the bolt holes on  
the TLM100 sensor component line up with the bolt holes on the adapter.  
Place the included mounting screws through the bolt holes on the TLM100 sensor component,  
and thread them into the adapter, tightening them to a torque of 10-15 in-lbs (1.1-1.7 N·m). Do  
not use threadlocking compounds containing methacrylate ester, such as Loctite Red (271), as  
they will cause stress cracking of the plastic enclosure.  
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Mounting Screws (x5)  
TLM100 Sensor Component  
TLM100 Gasket  
Threaded Adapter  
Threaded Tank Fitting  
TLM100 Interface Component  
Figure 4 – TLM100 Mounting With Threaded Adapter  
2.4.1.5 Installation on a Tank with a 1.25”BSP or 1.5”NPT Threaded Tank Fitting and  
Focus Tube  
If a focus tube is used for a tank with a SAE J1810 5-bolt fitting, determine the depth of the  
tank at the location of the tank sensor mounting hole and use a saw with a metal-cutting blade  
to trim the focus tube so that it reaches 1” above the tank bottom when mounted. Remove any  
burrs from the end of the focus tube after trimming.  
For a threaded tank sender mounting hole, first thread the adapter into the tank opening and  
tighten to a torque of 3-5 ft-lbs (4.1-6.8 N·m).  
Next, place the TLM100 gasket over the adapter so that the bolt holes on the gasket line up  
with the bolt holes on the adapter (WARNING – the gasket must be properly aligned; it only fits  
one way). Place the TLM100 sensor component on top of the adapter so that the bolt holes on  
the TLM100 sensor component line up with the bolt holes on the adapter.  
Place the included mounting screws through the bolt holes on the TLM100 sensor component,  
and thread them into the adapter, tightening them to a torque of 10-15 in-lbs (1.1-1.7 N·m). Do  
not use threadlocking compounds containing methacrylate ester, such as Loctite Red (271), as  
they will cause stress cracking of the plastic enclosure.  
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Mounting Screws  
TLM100 Sensor Component  
TLM100 Gasket  
Threaded Focus Tube  
Threaded Tank Fitting  
TLM100 Interface Component  
1” (2.54cm) clearance  
between focus tube and  
tank bottom  
Figure 5 – Mounting TLM100 with Focus Tube on Threaded Tank Fitting  
2.4.1.6 Installation on a Tank with a 1.25”BSP or 1.5”NPT Threaded Tank Fitting and  
Airlock  
Installation of the TLM100 on a tank with a 1.25” BSP or 1.5” NPT threaded tank fitting with an  
airlock is identical to installation with a focus tube, except that the trimming step is eliminated.  
Please refer to Section 2.4.1.5 for details of the mounting procedure.  
2.4.2 Mounting the TLM100 Interface Component  
The actual mounting of the TLM100 interface component is not critical and the unit can be  
mounted in any orientation. The TLM100, NMEA 2000® connector, and cable are all  
waterproof (rated IP67 – protected against temporary immersion in water) so you can mount  
the unit virtually anywhere. Once you have located a suitable mounting location, you can  
secure the TLM100 interface component by placing wire ties with screw eyes on the attached  
cables next to the TLM100 interface component. Do not use threadlocking compounds  
containing methacrylate ester, such as Loctite Red (271), as they will cause stress cracking of  
the plastic enclosure.  
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2.5 Connecting the TLM100  
There is one connection point (see Figure 6) for the TLM100: the NMEA 2000® connection.  
Please refer to Section 2.5.1 for making NMEA 2000® connection.  
Cable to  
Sensor  
NMEA 2000  
Connector  
Component  
Figure 6 – TLM100 Connections  
2.5.1 Connecting to NMEA 2000® Interface  
The Maretron TLM100 provides a connection to an NMEA 2000® interface through a five pin  
male connector (see Figure 7). You connect the TLM100 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 TLM100 (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 TLM100 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.  
Figure 7 – NMEA 2000® Connector Face Views  
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3 Configuring the TLM100  
The TLM100 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 TLM100 appropriately.  
1. Tank Type (Section 3.1) – Default is Fuel  
2. Tank Number (Section 3.2) – Default is Tank 0  
3. Tank Capacity (Section 3.3) – Default is No Tank Capacity Transmitted  
4. Tank Depth or Custom Calibration (Section 3.4) – Default is a 40” (1.02m) deep tank with  
rectangular cross-section with full at 2” (5.08cm) distance from the sender and empty at  
40” (1.02m) distance from the sender  
3.1 Configuring Tank Type  
As shipped from the factory, the TLM100 transmits the tank type as “Fuel”. You can  
reconfigure the TLM100 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 TLM100 tank type using a display product such as the Maretron  
DSM250 or Maretron N2KAnalyzer software. Refer to the user’s manual of the particular  
product that will be used for configuring the TLM100 as these manuals provide detailed  
instruction on configuration procedures.  
3.2 Configuring Tank Number  
As shipped from the factory, the TLM100 transmits the Tank Number as “0”. The TLM100  
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 TLM100 is  
configured or programmed by choosing a TLM100 tank number using a display product such  
as the Maretron DSM250 or Maretron N2KAnalyzer software. Refer to the user’s manual of the  
particular product that will be used for configuring the TLM100 as these manuals provide  
detailed instruction on configuration procedures.  
3.3 Configuring Tank Capacity  
In addition to indicating the fluid level within a tank, the TLM100 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 TLM100  
tank capacity using a display product such as the Maretron DSM250 or Maretron N2KAnalyzer  
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software. Refer to the user’s manual of the particular product that will be used for configuring  
the TLM100 as these manuals provide detailed instruction on configuration procedures.  
3.4 Tank Depth or Custom Calibration  
The TLM100 can be easily programmed for use with tanks of rectangular cross-section (see  
Section 3.4.1). For non-rectangular tank shapes, you can perform custom calibration so that  
the TLM100 accurately reflects fluid levels (see Section 3.4.2).  
3.4.1 Tank Depth Programming  
The TLM100 can be used with tanks that have rectangular cross sections. The TLM100 comes  
from the factory programmed for a 40” (1.02m) deep tank. In order to obtain correct level  
readings on a tank having a rectangular cross section but shallower than 40” (1.02m), you  
must program the TLM100 with the actual depth of the tank using a display product such as  
the Maretron DSM250 or Maretron N2KAnalyzer software. Refer to the user’s manual of the  
particular product that will be used for configuring the TLM100 as these manuals provide  
detailed instruction on configuration procedures.  
3.4.2 Custom Calibration  
For accurate tank level readings, the TLM100 must be custom calibrated if the tank shape is  
irregular or non-rectangular.  
You can calibrate the TLM100 using a display product such as the Maretron DSM250 or  
Maretron N2KAnalyzer software. Refer to the user’s manual of the particular product that will  
be used for configuring the TLM100 as these manuals provide detailed instruction on  
configuration procedures.  
4 Maintenance  
Regular maintenance is not required; however, an occasional inspection will ensure continued  
proper operation of the Maretron TLM100. 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 TLM100 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.  
5 Troubleshooting  
If you notice unexpected operation of the Maretron TLM100, follow the troubleshooting  
procedures in this section to remedy simple problems.  
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Symptom  
No tank level  
output  
Troubleshooting Procedure  
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.  
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).  
4. Remove the TLM100 sensor component from the tank opening and  
ensure that the surface of the ultrasonic sensor is not fouled.  
Inaccurate tank 1. If operating with a rectangular tank, ensure that the tank depth is  
level output  
programmed properly (see Section 3.4.1).  
2. If using custom calibration, re-calibrate the TLM100 (see Section  
3.4.2).  
Erratic  
Readings  
1. Remove the sender and place it on top of a standard paper towel roll  
core. Be sure the towel core is on a hard surface. Reset the unit to  
factory defaults using either a DSM250 display or N2KAnalyzer.  
Power the unit up and wait for two minutes. The tank level value  
should read 70-80% (this number can vary depending on the paper  
towel roll dimensions). If you see a depth reading in this range, the  
sensor is operational, so please follow the next steps in this  
sequence.  
2. Determine if the sensor’s gasket is installed properly. Only a Maretron  
TLM100 gasket should be used. The TLM100 is not compatible with  
cork gaskets, silicone sealant, or metal fittings. The gasket only lines  
up a single way. A clear line of sight should be observed through all of  
the mounting holes with the gasket installed.  
3. The TLM100 transmits sensor signals at a 6° angle. Think of the  
signal path as a cone getting progressively wider the deeper the tank  
is. There must not be any obstructions within this cone like baffles,  
return lines or clean out pipes.  
4. Sloped or grooved tank bottoms will cause an issue with a signal  
return when the tank is empty, causing the TLM100 to transmit an  
inaccurate or erratic reading or no reading at all. As long as there is  
some fluid providing a flat surface to reflect the signal, you should  
receive a valid reading.  
Figure 8 – Troubleshooting Guide  
If these steps do not solve your problem, please contact Maretron Technical Support (refer to  
Section 7 for contact information).  
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6 Technical Specifications  
Specifications  
Parameter  
Value  
±2%  
Comment  
Accuracy  
Resolution  
±1%  
Number of Tank Types  
Number of Tanks per Tank Type  
Maximum Tank Depth  
Minimum Depth Reading  
Support for Irregularly Shaped  
Tanks  
16  
16  
Fuel, Fresh Water, Waste Water, Live Well, Oil, etc.  
16 Tanks per Tank Type Numbered 0-15  
40” (1.02m)  
2” (5.08cm) Sensor Deadband  
Yes  
Can be Calibrated for any Shape Tank  
Programmable Tank Capacity  
Maximum Tank Angle  
Yes  
6°  
Allows Displays to Calculate Amount Remaining  
Without focus tube  
15°  
With focus tube  
Certifications  
Parameter  
Comment  
NMEA 2000  
Level B+  
Maritime Navigation and Radiocommunication Equipment & Systems  
FCC and CE Mark  
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  
0.4 Times/Second  
Response to Requested 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  
Protocol PGNs  
Electrical  
Parameter  
Value  
Comment  
Operating Voltage  
9 to 16 Volts  
DC Voltage  
Power Consumption  
Load Equivalence Number (LEN)  
Reverse Battery Protection  
Load Dump Protection  
<100mA  
2
Average Current Drain  
NMEA 2000® Spec. (1LEN = 50mA)  
Indefinitely  
Yes  
Yes  
Energy Rated per SAE J1113  
Page 14  
Revision 1.3  
 
 
®
Mechanical  
Parameter  
Value  
3.9”” x 1.2” x 1.0”  
(99mm x 30.5mm x  
25.4mm)  
Comment  
Interface Component  
Size  
2.7” dia. X 0.9”  
(68.6mm dia. x 22.9mm)  
8.5” (215.9mm)  
12 oz. (340g)  
Sensor Component  
Interconnecting Cable  
Weight  
Mounting  
SAE J1810 5-hole bolt Can mount to 1.25” BSP or 1.5” NPT using  
pattern  
available adapters  
Environmental  
Parameter  
Value  
Exposed  
IP67  
IEC 60945 Classification  
Degree of Protection  
Operating Temperature  
Storage Temperature  
Relative Humidity  
Vibration  
Rain and Spray  
Solar Radiation  
-25°C to 55°C  
-40°C to 70°C  
93%RH @40° per IEC60945-8.2  
2-13.2Hz @ ±1mm, 13.2-100Hz @ 7m/s2 per IEC 60945-8.7  
12.5mm Nozzle @ 100liters/min from 3m for 30min per IEC 60945-8.8  
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  
Revision 1.3  
Page 15  
 
   
TLM100 User’s Manual  
8 Maretron (2 Year) Limited Warranty  
Maretron warrants the TLM100 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 16  
Revision 1.3  
 
 
®
Appendix A – NMEA 2000® Interfacing  
TLM100 NMEA 2000® Periodic Data Transmitted PGNs  
PGN 127505 – Fluid Level  
The TLM100 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 TLM100  
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 TLM100  
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 TLM100 ships from the  
factory with a default value of 0xFFFFFFFF indicating “Data Not Available”.  
5: Reserved – This field is reserved by NMEA; therefore, the TLM100 sets all bits to a  
logic 1.  
Revision 1.3  
Appendix A – NMEA 2000® Interfacing  
Page A1  
 

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