BM25 Air Pressure Measurement
Practical On-Road Measurement and Matching
The BM25 SmartTest can measure air pressure simultaneously at up to eight individual points, while the vehicle (and vehicle combination) is driving. At the same time, the true horizontal brake efficiency (deceleration) of the vehicle (and vehicle combination) is also measured using advanced gyro based technology, which compensates for direction differences of the cabin and the vehicle.
- Multiple on-road testing capabilities
- Measure and report EBS control and regulation
- In-Cabin monitoring
For decades testing of brakes has been successfully conducted using roller brake testers. Modern roller brake testers include features that allow for inspection of the brake system performance against authority regulation. Roller brake testers also provide advanced diagnostic of the air pressure system and brake matching between axles as well as between the powered vehicles and trailers.
However, there is still a need for an efficient tool that can measure and report the EBS control and regulation of the individual axle air pressures.
BM25 SmartTest can measure air pressure simultaneously at up to eight individual points, while the vehicle (and vehicle combination) is driving. At the same time, the true horizontal brake efficiency (deceleration) of the vehicle (and vehicle combination) is also measured using advanced gyro based technology, which compensates for direction differences of the cabin and the vehicle.
The BM25 SmartTest presents the vehicle brake efficiency together with air pressure values from individual axles so the operator can conduct a detailed analysis of the EBS control and regulation. This allows the operator to analyse the actual vehicle brake performance, when being used in a real situation on the road.
The technology of the BM25 SmartTest features other important diagnostic possibilities, which have the potential to increase the return on investment of the equipment.
BM25 SmartTest features:
- On-road EBS testing by analysing the individual axle air pressure control versus vehicle deceleration.
- On-road analysis of EBS regulation of dynamic brake matching between the towing vehicle and the trailer.
- On-road verification of cee corridor compliance.
- Test for leaks in the air pressure system.
- Determination of the air pressure time lag between axles.
- On-road and static diagnosis of the overall air pressure system performance of the vehicle.
The BM25 SmartTest consists of a radio receiver box, which measures the deceleration and receives data from the radio air pressure transducers. The receiver box can easily be placed anywhere in the cabin, as the gyro based technology will ensure a correct measurement of the deceleration.
The BM25 SmartTest is additionally supplied with a Microsoft windows program, which is installed on a notebook PC. The notebook PC is also placed in the cabin and presents real time stamped air pressure and deceleration data from the receiver box wirelessly in real time.
The BM25 SmartTest can be supplied with up to 8 radio air pressure transducers, which can be connected to various air pressure measuring points on the vehicle or vehicle combination. Each radio air pressure sensor is supplied with a 1.5 metre hose and a powerful magnet, which ensures an easy placement of the unit on the vehicle.
The BM25 SmartTest windows program has a very simple, user friendly menu structure, which ensures that the program is easy and efficient to use. The program features registration of the operator, vehicle(s) together with operator comments explaining the test in more detail. All data is saved in a database with support for numerous search functions.
The sampled data are presented graphically together with selected key vehicle information. A number of graphical tools including zoom, axis settings and selection of data to be presented are available to the operator, so the graphical presentation can be customised to suit specific purposes.
The operator can send the graphical presentation to a printer or save it as a pdf file.
After the air pressure sensors have been mounted on the vehicle, the operator brings the battery powered BM25 SmartTest receiver and notebook PC with BM25 SmartTest windows program into the vehicle cabin.
Due to the gyro based technology of the deceleration measurement and the wireless communication between the BM25 SmartTest receiver box and the notebook, there is little restriction to the placement of these two components in the vehicle cabin. The operator can therefore easily and quickly place them on the passenger seat, cabin floor or any other convenient location in the vehicle cabin.
The operator can manually press the “start button” on the BM25 SmartTest Windows program and then start driving the vehicle and conduct brake applications. Alternatively, the BM25 SmartTest can be set to automatically commence data collection, where air pressure or deceleration measurement is used for automatically starting and stopping the data sampling.
The operator can select between several types of tests including a high resolution 8 minutes test or a low resolution test of up to 10 hours. Regardless, the data will be continuously sampled and stored by the BM25 SmartTest windows program in the database for later analysis.
The BM25 SmartTest is operated by only one person. When the on-road test is completed, the operator can use the BM25 SmartTest windows program to select the brake test from the database, which will be presented graphically. The operator can zoom, select and deselect measurements to be presented in this graphic, add cee corridor, make comments and print to either a printer or save to pdf files.
Excessive wear of the brake system is a major contribution to the overall maintenance cost of a vehicle involving component and labour cost, and loss of revenue from the vehicle being out of service.
One of the main reasons for excessive brake wear is often poor brake matching between the towing vehicle and the trailer. BM25 SmartTest is the perfect tool for examining the real life (on-road) brake matching of vehicle combinations.
With the brake match tool of the BM25 SmartTest, the operator selects the separate deceleration measurements of a towing vehicle and a trailer, which are then presented in the same graphic for direct comparison.