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5.0
Maintenance
The CMTD does not require any lubrication as all the moving parts have sealed or dry running
bearings. However the following routine checks must be carried out on the trolley:
5.1
Every 3 Months
Visually inspect the CTMD for signs of damage. If necessary, contact your distributor for
help.
Check that when the trolley is assembled, there is no play in the central joint.
5.2
Annual
The CTMD must be returned to Abtus Ltd annually for re-calibration to ensure measurements are
within specification. The condition of all components will be checked at this time and replaced as
required. Each trolley should have at least one trained operator who is responsible for returning the
trolley.
The trolley is marked with a calibration sticker inside of the battery compartment showing the next
annual due date and must be returned to Abtus for annual calibration and maintenance. If the trolley
is used beyond the calibration due date the performance may be degraded.
If the equipment becomes defective, or if it has an out of date calibration sticker, a warning notice
should be placed on the device to prevent further use and should be returned to Abtus for repair,
maintenance and re-calibration.
6.0
Measurement Characteristics
6.1
Cyclic Top Faults
Cyclic Top Distance Range
2 - 200m
Cycle Lengths Detected
4.5m, 6m, 9m, 13m, 18m
Depth Range
0-30mm
Depth Accuracy
±2mm
Depth Resolution
0.1mm
The ABT7000 measures top faults which, when present on the track at a regular interval form Cyclic
top.
Top faults are measured by calculating the vertical versine along the length of the track and
identifying the peak values. The identified peaks are reported to the user as cycles and are shown
on the screen as vertical bars of a height equal with the versine measured in millimetres. The chord
length of the versine is selectable by the user between 4.5 m, 6 m, 9 m, 13 m and 18 m and the
measurement is carried out every 0.1 m. The measurements are done without loading the track and
