NPN output
Specifications
Please refer to the Main Unit page for detailed specifications. monitoring screen.
Wiring
Refer to the Electrical Installation page for wiring instructions.mechanical and electrical installation.
Configuration Procedure:
Ensure all basic parameters are properly configured.
Connect the wiring according to the instructions on this page .
Set Parameter E01 to define the output logic refer page:
Normally Closed (NC): Conducts when inactive
Normally Open (NO): Open circuit when inactive
Set Parameter E02 to define the NPN output signal type.
If selecting "Pulse Output":
Use E03 to define the pulse width (duration of each pulse).
Use F03 to activate the pulse simulation function and verify that the receiving device correctly detects the pulse count.
If selecting "Pulse v2":
Use E03 to define the pulse width.
Use E14 to define the volume represented by each pulse.
Use F03 for pulse simulation, and confirm the signal is correctly received by the downstream system.
If selecting "Flow Out-of-Range Notification":
Use D04 to enable the alarm.
Use D05 and D06 to set the acceptable flow range.
Use D07 to set hysteresis control — a positive value will reduce the likelihood of repeated alerts by adding a delay buffer.
Use simulation parameters F01 and F02, then return to the main screen to confirm the alarm functions as expected.
Turn off simulation once confirmed.
If selecting "Cumulative Flow Exceeded Notification":
Use D08 to enable the alert.
Use D09 to define the trigger condition:
“Greater than” for positive flow
“Less than” for negative flow
Use D10 to define the target cumulative volume:
Positive values for positive flow direction
Negative values for reverse flow direction
Use F01 and F02 to simulate, and return to the main screen to verify alarm operation.
Turn off simulation after verification.
Return to the main screen. Setup complete.
Pulse Output
The pulse output function provides a direct count of paddlewheel rotations. One pulse is generated for every 180 degrees of paddlewheel rotation.
At a flow velocity of 10 m/s, the maximum output frequency will not exceed 300 Hz.
As this output does not utilise LORRIC’s internal data processing algorithms, it is recommended for use in applications where high precision is not required.
To calculate totalised flow over a given period, simply divide the number of received pulses by the scale factor corresponding to the pipe size. Please refer to the following reference data for scale values.
Plastic (PVC, PP, PVDF) T-connector
Pipe diameter
Model
Metric ratio (pulses per litre)
US Gallon (pulses per US gal)
UK Gallon (pulses per UK gal)
1/2"
FP-P016
106.55
403.33
484.38
3/4"
FP-P020
67.23
254.48
305.62
1"
FP-P025
53.33
201.89
242.46
1-1/4"
FP-P032
24.44
92.51
111.11
1-1/2"
FP-P040
17.02
64.43
77.38
2"
FP-P050
9.86
37.31
44.81
2-1/2"
FP-P065
5.42
20.52
24.64
Pulse V2 Output
Pulse V2 is a proprietary feature developed by LORRIC, based on its patented AxleSense technology.
This advanced algorithm allows users to define a fixed volume per pulse, and the system will generate one pulse each time the specified volume passes through the meter.
In addition, the system intelligently compensates for low-flow discrepancies, further reducing pulse output error.
Compared to traditional pulse output — which simply emits a pulse each time the paddlewheel blade passes the sensor — Pulse V2 offers two key advantages:
Easier configuration for users, as volume-based pulses are more intuitive when setting up controllers.
Improved accuracy at low flow rates, due to built-in compensation logic.
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