Surveying
With the Manual Roughness Counter The MRC has only two states, RUN and HOLD. On reset/power up the MRC is in the RUN state. The HOLD button will change the state to the HOLD state. This freezes the Elapsed Distance and BI displays. It also zeros their counters in the background. With the data frozen, the operator can write down the elapsed distance and the BI counts. Pressing the RELEASE button will return the system to the RUN state allowing the elapsed distance and BI displays to update. It will be noted that while the HOLD button was pressed the system continued recording in the background. At any stage, holding down the HOLD and RELEASE buttons for more than 3 seconds will reset the system, zero all counters and put the system in the RUN state. It is recommended that roughness surveys be executed with the MRC as follows:
The intervals where the HOLD button is pressed are termed sampling intervals. The roughness survey gives the roughness count over these intervals. With manual surveys it is usual to adopt sampling intervals on the order of 1 km. Any more frequent and it becomes difficult for the operator to record the data. If more frequent sampling is required computerised recording using our ROMDAS data logger should be used. There are LEDs adjacent to each BI input as well as the odometer sensor input. These will flash when a pulse is received. If they are not flashing check the cables and connections. |
