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4.4.3 Fuel Consumption Wiring with F127 Flow Computer
* Regulated DC supply should be in the range of 8-30 Volts DC. When powering
the flow computer from a vehicle charging system a DC-DC converter is
recommended to protect the system from voltage spikes.
4.5 Meter Calibration Factor (K-Factor, Scale Factor)
Each flow-meter is individually calibrated and is marked with the number of pulses per
unit volume (e.g. pulses/Litre) which is characteristic to the particular meter. Nominal
values are shown in the specification section of this manual. For meters ordered un-
calibrated the nominal values shown in the specification section should be used; additional
error should be expected for meters when using nominal K-factors on un-calibrated meters,
this information can be found in the Specification Table (section 1.2). Field calibration of an
un-calibrated meter removes this error; if you are measuring a high viscosity liquid, field
calibration may actually achieve better levels of accuracy than can be obtained from the
factory diesel calibration.
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