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Building Technologies Basic Documentation LMV27... CC1P7541en
13 Fuel meter input X75 pin 1 / X75 pin 2 17.12.2018
13.2 Fuel throughput
With the fuel meter connected, the LMV27 calculates continuously the current fuel
throughput. The time required for calculating the fuel throughput varies and lies between
1 and 10 seconds. If the fuel meter delivers no pulses for more than 10 seconds, the
display shows 0 fuel throughput. This means that when fuel throughput is at its
minimum, the sensor should have a pulse frequency of at least 0.1 Hz. The display is
smoothed to improve the settling process. With fuel throughput at its maximum, the
maximum frequency is 300 Hz.
13.2.1 Configuration
Calculation of fuel throughput is configured based on the pulse valency of the connected
fuel meter.
No. Parameter
128 Fuel meter: Pulse valency (pulses/volume unit)
When the pulse valency is set to 0.00, the display shows 0 throughput.
13.2.2 Reading out the fuel throughput
The current fuel throughput can be read out via the following parameter on the service
menu:
No. Parameter
960 Fuel throughput in volume unit /h (m³/h, l/h, ft³/h, gal/h)
Display of fuel throughput is possible up to 6553 volume units/h.
Note
Display of fuel throughput up to a value of 99.9 on the service menu is made with one
decimal place, from 100 with no decimal place.
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