Press 2 (Remove / Restore) Allows you to select a suspicious correlation for removal. After pressing 2, use the arrow keys to select the cross on the regression graph for removal (a box appears around the selected cross) then press ENTER. Press 3 (Load data) Retrieves previously stored regression analysis graph results. Press 4 (Save data) Saves the current regression analysis graph results. Press 5 (Delete) Enables the deletion of saved regression analysis files.
Set-up Press 1(Correlate on start-up) Toggles between YES and NO. If set to YES, the control unit will go straight to the correlate screen after turning on. If set to NO, the control unit will go straight to the Main Menu after turning on. Press 2(Default filters) Toggles between CLEAR and RETAIN. If set to CLEAR, in survey mode, the filters will clear each time a new correlation is processed.
Press 6(Power Saving) Press 1 to toggle the System power off between NEVER and 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55 and 60 minutes duration. Press 2 to toggle the Backlight off between NEVER and 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55 and 60 minutes duration. Press 7(Display set-up) Press 1 to incrementally decrease the screen brightness. Press 2 to incrementally increase the screen brightness. Press 3 to incrementally decrease the screen contrast.
Test and Service Press 1(Restore default pipe data) Wait a few seconds and the default pipe data will be restored to the control unit. Press 2(Units are Metric) Toggle between METRIC and IMPERIAL measurement units. Press 3(Time is in milliseconds) Toggles between MILLISECONDS and SECONDS Press 4(Using HP printer) Toggle between HP and EPSON printer. Press 5(Language) Select the required language by using the arrow buttons.
Press 6(Set clock) Set the clock according to the user preferred format. Press 7(Debug Messages are Off) Toggles between ON and OFF. This should normally be set to OFF and is normally only used during fault diagnosis. Press 8(Information) Connect sensors to Out Stations and turn on before pressing 8. This displays the current firmware and software version currently installed on the MC Digital.
Press 9(Diagnostics) Displays a series of numbers. This is only used during fault diagnosis Other System Options The MC Digital is designed for versatility. Pressing 1 will activate the Permalog Patroller Link, changing the MC Digital into a Permalog Patroller.
Correlation Screen A dashed cursor line shows the position of the largest peak (best result). The dashed cursor line can be moved once the correlation has been stopped, by using the arrow keys. Moving the dashed cursor line alters the correlation distance. This screen shows the result of a correlation where the position of the leak is. In this example 63.4 metres from the Red Out Station and 60.6 metres from the Blue Out Station. The time delay is calculated at 2.3 milliseconds.
Pipe data Press 2(Pipe data) To accurately locate a leak position the user must enter the correct information with respect to the physical properties of the pipe. Each section must be entered to be accepted by the system. Press 5 to Add new pipe data. A default setting appears.
Press 1 to enter Length, the distance between the sensors. In this example 124m. Press 2 to enter material type, use the arrow keys to select the required pipe material and press ENTER. In this example cast iron is selected.
Press 3 to enter the diameter of the pipe. In this example 80mm. The velocity column will then automatically be updated. In this example 1.280 m/ms. To add another pipe length for mixed material situations, press 5 to add another pipe. If working on mixed materials, work from the sensor colour displayed at the bottom of the pipe data screen, back to the sensor colour at the top of the screen. Up to 6 mixed materials can be used in one correlation.
To delete a pipe, use the arrow keys to highlight the relevant pipe to remove and press 6. To delete all pipe data press 0. To use a manual velocity the user has calculated, press 4 and type in the new velocity value, this will automatically update the default value for the current correlation only. To enter and store extra user defined velocity’s and diameters, press 2 Materials, then press 1 Edit materials, then press 1 Edit table, then press 3 Add entry.
Zoom Press 5 (Zoom) To see a more enhanced view of the leak centred around the dashed cursor line. Moving the dashed cursor line along the graph to the required point then press 5. Use the arrow keys to zoom in or out stage by stage. For a quicker zoom press 1 to zoom to maximum view or press 5 to zoom to a minimum view.
Peak Suppression Screen Press 6(Peak Suppression) To suppress a section of the time delay range from the current correlation. This may be used to remove known leaks or demand usage that may be hiding unknown leaks. Move the dashed cursor line to the start point of the data to be removed and press 1 to select a start point. A small arrow will appear below the correlation graph. Move the dashed cursor line along the data to select the stop point.
View Settings Press 7 (View Settings) During correlation or after stopping a correlation press 7 to view all pipe data and filter settings currently in use. A pop up box appears to display the information. Press Cancel to remove the display.
Calculate Velocity Press 8(Calc Vel) After stopping correlating the option to calculate velocity appears. A velocity check gives a more accurate velocity of the pipe to be correlated instead of using the default velocity value. To calculate velocity a leak must be present, either real or induced. The leak can either be between the sensors called an “In Bracket” check or outside of the sensors called an “Out of Bracket” check.
A new velocity will be displayed under the correlation graph The control unit then gives you the option to either use the calculated velocity by pressing ENTER or CANCEL to ignore it. By accepting the calculated velocity value, the default velocity value under Pipe Data will be replaced with the new calculated velocity value. A new correlation position may now be displayed using the more accurate velocity value.
Filters If correlating with pipe data entered, the default filter settings will be used depending on the properties of the pipe. Some times this may not be accurate enough to filter out unwanted frequencies, so the user may wish to alter the filer settings to remove certain frequencies that are influencing the current correlation.
Press 1 (Select cursor) This toggles between the two cursor lines. Only the longer dashed cursor line can be moved. Press 2 (Low cut-off) When the left cursor line has be selected the low cut off option is displayed. Move the left cursor to the required position and press 2. This will remove all frequencies to the left of the cursor line. Removed frequencies are displayed in a cyan colour.
Press 3 (Notch) This options allows a “notch” of frequencys to be filtered out. Move the selected cursor to the left of the area of frequency to be removed and press 3. A small arrow appears under the graph. In this example 81Hz is selected. Move the same cursor to the right of the area to be removed and press 3 again. In this example 105Hz. The notch area of filtered out frequencys will change colour to cyan.
Program upgrade (Software and Firmware) The MicroCorr Digital correlator and Out Stations have been designed so that their programs can be upgraded as the latest developments take place. The MicroCorr Digital Software is defined as the user interface within the base station, and the Firmware describes the program that communicates between the correlator base station and the Out Stations. To upgrade the Software and/or Firmware a program must be installed on the PC. This is the MCD Updater Application.
Upgrade Information 5. This field gives the name and location of a firmware update file. These files have the extension .mdf and contain the required information to upgrade a system’s firmware. 6. This button is used to ‘browse’ for a firmware update file on a local/network file system. 7. When a firmware file has been selected, this field displays version information about the file. This allows the user to check that a newer version of firmware is being installed onto the system. 8.
Upgrading a Base Station The following steps should be followed to upgrade the software/firmware within a base station: 1. Connect the PC to the base station via the supplied serial cable. 2. Connect external power to the system. This ensures that the system does not power down while the upgrade is in progress. Then back up all correlation files to the PC. 3. Start the MCDUpdater application and ensure that the ‘port’ is set correctly and ‘unit type’ is set to base. 4.
Technical Specification Base station Process Frequency response Filter selection Full digital correlation 0.1 to 5000Hz Automatic Parametric Filtering Manual setting if required ±0.
Out Station Radio communication Radio frequency Controls Single frequency digital transceiver UHF (local regulations apply) ON/OFF (all functions remotely controlled and monitored from Base station) with LED status light Headphones External antenna (if required) Rechargeable Lithium ion batteries, field replaceable >18 hours Flashing lights (2) External antenna Integral sensor stowage Integral cable wrap 210 x 145 x 305mm 1.
Warranty All equipment is warranted by Palmer Environmental Ltd to be free from defects in materials and workmanship for a period of one year (unless otherwise stated) from the date of shipment to the original customer. This warranty is only valid if the equipment has been installed and used in the correct manner as described in this manual. Repair or replacement (at Palmer Environmental’s option) will be made without charge provided the above conditions have been met.
