HSWIM Calibration Instruction TEL Equipment_Mikros

TELCOM provides results for:
1. Weigh sensor calibration factor in terms of:
• Mean error (μ), an indication of bias 0 means that the result is not skew.
• Error percentage as the standard deviation (σ) value, this is an indication
of the variance between the static and the dynamic weight.
• The 95 % confidence value (percentage) of the mean error.
3. Front axle factor compensation as a percentage.
4. Temperature correction factor (percentage per degree).
5. Axle spacing correction (speed correction) done as a correction on the loop
(sensor) spacing.
Static scales normally are either:
1. Wheel or axle scales. Then in the case of wheel scales it is possible to
individually calibrate left and right sensors (if this configuration is used).
Should axle scales be used half the value is used to calibrate individual
wheel sensors.
2. Platform scales. In the case of a full fixed platform scale only gross vehicle
mass (GVM) can be used for calibration. If segmented platform scales (or
small axle group platform scales) are used axles must be allocated to
segments that can be weighed.
There are therefore four units that can be distinguished:
i. Wheels
ii. Axles
iii. Segments
iv. GVM
In the calibration procedure of TELCOM three types of vehicle are defined:
1. “CAL” vehicles: these are vehicles accepted or chosen as a valid calibration
vehicle.
2. “ALL” vehicles: these all the vehicles that where logged during the calibration
procedure. (The rejected plus accepted vehicles for calibration).
3. “OTHER” vehicles: are the vehicles that are normally rejected for calibration
procedure.
Where two sensors are used per lane for improved accuracy the calibration results
are presented per sensor and for the “Physical Lane” (PLn).
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MS001-00006-56 HSWIM_Calibration_Instruction_Issue_3 17-10-00