Maretron user manual Tank Level Measurement Applications, FPM100 User’s Manual, Page, Revision

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2.4.2 Tank Level Measurement Applications

FPM100 User’s Manual

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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Revision 1.3

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Contents Revision Copyright 2012 Maretron, LLP All Rights Reserved RevisionPage Maretron, LLP 9014 N. 23rd Ave #10 Phoenix, AZPage Revision HistoryFPM100 User’s Manual RevisionTable of Contents Table of Figures Table of Appendices1.1 Introduction 1.3 Features1 General 1.2 Firmware Revision1.4 FPM100 Accessories 1.5 Quick Install1.6 Theory of Operation 1.6.2 Accuracy of Tank Level Measurement2.1 Unpacking the Box 2 InstallationFigure 1 - Graph of Transducer Accuracy vs. Tank Depth 2.4 Mounting the Pressure Transducer 2.2 Choosing a Mounting Location2.3 Mounting the FPM100 2.4.1 Pressure Measurement Applications2.4.2 Tank Level Measurement Applications Figure 4 - Fluid Level Measurement with Pressure Transducer2.5.1 NMEA 2000 Connection Tank Fitting Ball Valve Pressure TransducerFigure 7 - Pressure Transducer Connection Diagram Figure 6 - NMEA 2000 Connector Face ViewsPin # Signal Name 2.5.2 Pressure Transducer Connections3.2 Configuring a Channel in Pressure/Vacuum Mode 3 Configuring the FPM1003.1 Configuring Channel Mode 3.2.1 Configuring Instance3.2.3 Configuring Pressure at 4mA 3.3 Configuring a Channel in Tank Mode3.2.2 Configuring Label 3.2.4 Configuring Pressure at 20mA3.3.4 Configuring Tank Capacity 3.3.2 Configuring Pressure at 4mA3.3.3 Configuring Pressure at 20mA 3.3.5 Tank Levels Calibration3.3.5.1.3 Fluid Density 3.3.6 Configuring Tank NumberFigure 8 - Empty Tank Depth and Full Tank Depth Parameters 3.3.5.2 Custom Calibration3.3.7 Configuring Tank Type 4 Maintenance3.3.8 Configuring Data Damping Period Symptom 5 TroubleshootingTroubleshooting Procedure Specifications Tank Level Mode 6 Technical SpecificationsFigure 9 - Troubleshooting Guide Specifications Pressure/Vacuum ModeMechanical 7 Technical SupportElectrical Environmental8 Installation Template Figure 10 - Mounting Surface Template9 Maretron 2 Year Limited Warranty Warranty Return ProcedureAppendix A - NMEA 2000 Interfacing Appendix A - NMEA 2000 InterfacingFPM100 NMEA 2000 Periodic Data Transmitted PGNs Page A1