ELD Rules
& Readiness

ELD Compliance Requires a
Combination of Software & Hardware

This page outlines the key ELD rules and provides an example of compliant
hardware & software meeting the current requirements of the ELD mandate as set out by the FMSCA

ELD Rule: Interface With Engine
ELDs automatically capture whether engine is on, determines whether the vehicle is in motion, records miles driven and engine hours.

ELD Rule: Location Information

Automatic for each change of duty status; at 60-minute intervals while vehicle is moving; at engine-on and engine-off; and at beginning and end of personal use and yard moves.


FM ELD Bluetooth


Plugs into the J1939 or J1708 Jbus connector and sends via Bluetooth BLE4.1 to any device the engine diagnostics data required by FMCSA for Electronic HOS compliance including: Odometer, Engine Hours, Engine ON / OFF.

Electronic Logging (elogs)
The quickest, easiest way to begin the process of becoming ELD compliant is to switch from 
paper logs to an electronic logging solution like Fluid eLog

Fluid eLog

Mobile app provides a full set of graphical features for HOS and RODS for display to authorities.

ELD Rule: Graphical Display of Duty Status
Presents a graph grid of driver daily duty status changes
on a display or a printout.

ELD Rule: RODS Printout at Roadside

Choice of printout or graphic display.

AVL Hardware & Sensors
Fluid supports a wide range of AVL Telematics hardware
as well as temperature, contact and flow sensors. 

Popular Hardware

ELD Rule: HOS Driver Advisory Messages 

Warning of unassigned time/miles upon login.

ELD Rule: Default Duty Status

Default status is “on-duty not driving” when vehicle
has not been in motion for 5 consecutive minutes
and driver has not responded to ELD prompt
within 1 minute.

ELD Rule: Clock Time Drift

UTC (coordinated universal time) synchronization
– deviation cannot exceed 10 minutes at any time.


ELD Rule: Resistance to Tampering
Prohibits alteration or erasure of original data collected
by ELD, or alteration of the source data streams used
to provide that information.


ELD Rule: Identification of Sensor Failures and Edited Data

Monitors, records, and displays edits with annotations,
as well as detectable ELD malfunctions and data


Fluid eLog

Fluid eLog supports warnings and malfunction alerts via email or text. ELD data is secure and records are kept on premise or in secure cloud hosted environments. Elogs are tamper resistant and alerts can be sent upon disturbance. Engineered for precision Fluid eLog also meets the Clock Time Drift rule.

Benefits of Immediate ELD Deployment

• Immediate fuel savings and maintenance costs

• Immediate increase in productivity through electronic logging

• Immediately save time and increase efficiency by getting rid of paper logs

• Automatically track mileage

• Reduce fines

• Electronic audit trail

• Increase driver safety

Fluid eLog + Hardware = ELD Compliance


The ELD Rule Explained

Free guide to the ELD Rule. In plain language.