Advanced Meters

NMI Approvals

To maintain NMI (National Measurement Institute) approvals, Fuellox must not act as the billing provider. Make sure compliance by using the meter’s native fuel resale and printing capabilities for all billing-related functions.

1. LCR IQ Meter Register

LCR meters offer strong functionality for bulk fuel management and complex resale scenarios.

Fuellox combines to provide a simple digital foot print from the LC Meter, combining advanced fleet identificaiton, location tracking, and reporitng options for the operator.

Wiring

Wire	LCRIQ	Fuellox	Notes
24V +	Pin 3 : J1-3 12–24	J9-2 +VBAT
24V -	Pin 2 : J1-2 GND	J9-1 GND
Pulse signal	Pin 52 : Aux Output	J18-3 Pulse Signal
Pulse 0V	Pin 47 : Common 0V	J18-4 Pulse 0V

Fuellox Bypass

In cases where a bypass is required, configure a captured key bypass circuit that closes the logic gate managed by Fuellox.

Important

Never close the relay under power. Doing so may result in a continuously energized relay, leading to failure and an inability to bypass the system.

LC Meter Setup

1. Configure the fluid as per the OEM manual.

2. Configure the register to suit the meter as per the OEM manual.

3. Make the following settings on the meter in the Calibration Menu.

LC Menu: Calibration (2/4)

Item	Value	Note
Pulse Output Frequency	20	1
Auxillary Output	Calibrated Scale Output	-

Set the Scaled Pulse Output to the highest possible value. For example, a setting of 20 will generate 20 pulses per litre. Increasing this value improves the accuracy of volume readings between the Fuellox system and the LC Meter.

Important

The available options for Pulse Output Frequency depend on the system configuration and the meter’s defined pulses-per-litre (PPL) parameters. If this value is modified, the Fuellox calibration must also be updated to reflect the change. Recalibrate the Fuellox using the standard menu options or contact the Fuellox Helpdesk for support.

Pump Start and Control

In standard operation, the LC Meter initiates the pump by sending a signal to ground. To enable Fuellox to control the pump’s start/stop functionality, an additional external relay is required.

When Fuellox authorises a transaction, it activates Relay 1 and Relay 2, powering the external relay. This creates an additional logic gate that integrates with the LC Meter’s existing pump start signal—enabling secure and controlled dispensing.

Typical Automotive Relay

Relay	Desc	Fuellox	LCR iQ
85	Coil In	J12-4 Relay 1 +VBAT	None
86	Coil Out	J12-3 Relay 1 0V	None
30	Supply Power	None	Pump Active Line
87	NC Switching	None	Pump Active Line
87a Optional	NO Switching	None	None

A widely available and recommended component is the Automotive Fused Relay SPST 30A, suitable for reliable integration in Fuellox installations.

Calibration

Once the Fuellox unit is fully operational, make sure that the meter is calibrated by a certified calibration provider.

Note

Record the value set for Pulse Output Frequency during calibration, and apply the same value within the Fuellox Device Calibration settings to ensure consistency.

Operation

To operate the system with an LCR iQ Meter and Fuellox:

1. Press Start on the LCR iQ Meter.

2. In the Fuellox app, select the appropriate fleet equipment.

3. The Fuellox app will automatically connect to the controller.

4. Press Start in the Fuellox app.

5. Fuel flow will commence.

6. Press Stop in the Fuellox app once filling is complete.

7. If additional fuel is required for other fleet assets, continue dispensing through the Fuellox app.

8. When the transaction is complete, press Stop on the LC Register.

9. The register will display the total amount dispensed.

10. Fuellox will log multiple dispense records per transaction for accurate fleet tracking.

Limitations

• The Fuellox system does not detect reverse flow. If the meter reading decreases (e.g., from 50.1L to 50.0L), Fuellox will interpret this as positive flow and incorrectly record 50.2L.

• Fuellox is not intended for use with hazardous liquids or in classified hazardous environments.

Recommendations

To ensure optimal performance and accurate readings:

• Set an appropriate timeout value on the LC Meter for automatic transaction shut-off.

• Use the highest whole number possible for the Pulse Output Frequency to maximize resolution.

• Configure the Fuellox device’s display precision to match that of the register (e.g., whole units, tenths, hundredths).

• Use properly shielded wiring to minimize signal noise in the pulse line.

2. Liquip DFV

Coming Soon

3. TSC 3000 Electronic Register

Coming Soon

4. Veeder Root Pulser

Coming Soon