WPT FAQs

Here, you will find a list of frequently asked questions. The questions are structured according to priority areas:

  • Report: Here, you will find all questions concerning the content of the report, e.g. how to change formatting or what the undefined areas mean.
  • Support: Here you will find information on how to get help in case of problems.
  • System: Here, general questions about the function of the system are answered, e.g. about the requirements for achieving the measuring accuracy.
  • Machine: Here you will find questions, especially concerning the operation and maintenance of the system on the machine.

If you do not find an answer to your question, please contact us.

WPT Questions and Answers about the Report:
When an area is more than 50 feet (15 meters) away from the nearest one.
The construction time specifies the hours needed from when the job starts to when it ends. If the job extends over several days, then the breaks and nights are also included in the time.
The diesel consumption listed in the WPT report is determined precisely for the period from the start of construction to the end of construction. The exact same time period must be set up in WITOS for the evaluation. Differences can still occur because WITOS uses a time resolution of 5 minutes.
The machine operator must complete the truck loading process by pressing the favorite button and this will document the truck loads.
The milling pattern quality is only supported by machines with MILL ASSIST.
The filling level sensor would have to be queried to determine the water consumption. Not all series or machines have a filling level sensor fitted in them.
The WPT report supports all of the languages that are also supported by WITOS. The following languages are supported:
- German
- English
- English (US)
- French
- Spanish
- Dutch
- Italian
- Polish
- Hungarian
- Czech
- Russian
- Swedish
- Danish
The language can be changed from the WITOS user settings.
It supports both the 24h and 12h AM/PM time formats.
A specific format can be set for each user from the WITOS user settings.
The date format is linked to the language selected by the WITOS user. If the language is set to US_EN then the date format is YYYY-MM-DD. If another language is selected, then the date format used will be the standard DD-MM-YYYY format.
The time format can be changed from the WITOS user settings.
Huge differences between automatic machine measurements and manual measurements made by the driver or a surveyor can have several causes:
it was milled in two layers in places or even throughout: the machine estimate calculates all of the partially milled areas as the total area
a very low milling depth was used for the milling: the machine estimate can be considerably less accurate at low milling depths
material was not loaded or the milling edge was covered
there were other machines on site, which were not included in the automatic machine estimate
surfaces were measured manually and they were not included in the automatic machine estimate
areas were marked for reworking by the driver: even though they were included in the report as rework areas, they are not included in the overall estimate
faults existed on the machine, e.g. dirty scanners, defective scanners, so the full milling width was used in these cases.
The undefined area value shows the proportion of areas for which no milling width could be determined and which were then evaluated as full milling widths. This value should normally lie in the range going up to 5%. Higher values might increase the inaccuracy of the determined areas. Causes of higher values could be dirty scanners or milling parameters outside the WPT specification (e.g. milling with very low milling depths of less than 20 mm).
WPT Questions and Answers about the Support:
Contact your local office if you have any questions or problems concerning the WPT system.
The reports will be kept for at least 6 weeks.
All relevant warnings and messages generated in connection with the WPT system are displayed on both the machines and the Wirtgen Group's WITOS telematics system.
WPT Questions and Answers about the System:
A job will be automatically completed and the report will be sent out when the machine is at least 5 kilometers (3.1 miles) from the last milling position and it has already started milling again.
A job will be automatically completed and the report will be sent out when the machine is at least 5 kilometers (3.1 miles) from the last milling position and it has already started milling again.
Typical accuracies of ±2.5% can be realized when measuring the milled surface if the following conditions are met:
- you are receiving suitable GPS correction services
- mostly uninterrupted GPS reception without reflections or shadows
- effective milling depths: >2.0 cm
- milling depth controlling using the LevelPro automatic leveling system
- correct zeroing using the LevelPro automatic leveling system
- edge protection or scanning in front of the compactor for leveling are being used
- construction site size >1,000 m2
- no large quantities of milled material or other interfering objects on the surface to be milled or, in the event of partial cuts, on the surface that has already been milled
- a clearly visible milling edge exists (no water present, it is not covered by milled material, nothing touching it)
- the scanner is not dirty.
By evaluating the filling level change in the water tank.
Yes, by evaluating the filling level change in the water tank.
The machine’s displayed times are synchronized with the GPS time and therefore they are accurate to the second.
Absolute: ~1 meter; Relative: less than a centimeter
The LevelPro zero position has a direct effect on the determined milling depths because, with a full cut, the depth values are taken directly from LevelPro. A deviation from the zero position that is too big will have a negative effect on the determined milling width.
The WPT job report will be sent out when the machine’s job has either been completed manually by the operator or when the job automation system completes the job.
No longer receiving WPT reports might be due to one of the following reasons:
- your e-mail provider has changed the spam filter settings
- your e-mail postbox is full
- your WITOS user account has been deactivated or your WPT report authorization has been changed
- the job has still not been completed on another machine
The customer administrator in your company can set the "Milling PM" role to "read role for MILL PM" in the WITOS user controller for the user who is to receive WPT reports in the future
You don't hold the necessary authorization to open and activate the document.
Your Excel version is too old, you need at least Excel version 2016 or later to open the document.
WPT Questions and Answers about the Machine:
Determining the milling width is essentially based on the evaluations of the LevelPro settings and the profile surface measured by the laser. In some cases, the evaluation is not clear, for example:
- milling a full cut with an inclined milling profile (milling edge ends at zero on one side)
- milling with incorrectly zeroed LevelPro sensors
- excessive dirt / milled material in the scanned area, which might have been interpreted as a milled edge
- fine milling with very small milling edges
Evaluating the milling edge height takes place analogously or simultaneously with the milling width evaluation. Any error causes present then will also affect the accuracy of the milling edge height.
- the LevelPro zero position is incorrect
- there is muck on the milling edge
Is reworking ON?
The accuracy of the WPT calculated weights depends on a lot of factors with one of the most important being the density, which is not measured but input by the operator. Another important factor is proper reset of LevelPro-System and neglectable / no dumpings in front of the drum.
The milling volume is determined by averaging of the effective left and right milling depths. The effective milling depths are based on the LevelPro settings. If the LevelPro values do not reflect the real milling depths (e.g. LevelPro incorrectly zeroed), this will be considered to be an error. The system measures the leveling offsets and takes them into consideration. Any deviations from the real milling geometry used for the straight line approximation caused by averaging the effective milling depths will be included as errors in the volume calculation. D-GPS availability and a given minimum milling length (>5 m) is needed to precisely calculate the milling track and this is also included in the milling volume.
No. The dust suppression water accounts for only 1% inaccuracy in relation to overall weight accuracy and is therefore neglected.
The volume is calculated based on effective cutting area and cutting distance. When the effective cutting area calculated by the scanner profiles exceeds the one calculated by averaging effective left and right depths by more than 30% the profile based approach is used and thus dumped material will then be taken into account. In general it will we negelected.
When doing cut-to-ground jobs or when leaving material in place the real cutting edge is usually covered by dirt.
No
The document has still not been fully loaded. The content has to be released and the macros have to be activated first (an info bar will appear at the top of the document).
The macros have not been activated. The macros can only be activated after the document has been opened.
The filter evaluates which milling depths are available for the job and only those depths are displayed in the selection.
The milling width can no longer be determined precisely if the scanner is dirty. The undetermined surface becomes larger and the result will be less precise.
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