Palmer Environmental MCD MicroCorr Digital Leak Detector Base Station User Manual MicroCorr 6 short form manual

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MicroCorr Digital
Users Guide
Ty Coch House
Llantarnam Park Way
Cwmbran
NP44 3AW
United Kingdom
Tel: +44 (0) 1633 489479
Fax: +44 (0) 1633 877857
Email: info@palmer.co.uk
Internet: www.palmer.co.uk
Mcorr Dig UG
Issue 5b
August 2003
Based on SW-042-01-109a
Based on FW-042-02-107a
MicroCorr Digital Users Guide
Introduction and Features.......................................................................................................... 3
New features.............................................................................................................................. 3
Operational Benefits .................................................................................................................. 4
Principle of Correlation .............................................................................................................. 5
System Overview....................................................................................................................... 6
Standard system configuration .................................................................................................. 6
Optional accessories ................................................................................................................. 6
Fully Digital Correlation ............................................................................................................. 7
Features of the correlator unit ................................................................................................... 8
Features of the Out Stations...................................................................................................... 9
MicroCorr® DIGITAL correlator unit operational features ........................................................ 11
Key functions ........................................................................................................................... 11
Using the MicroCorr Digital Correlator................................................................................... 12
BATTERY WARNING.............................................................................................................. 12
Step 1: Charging and installing batteries................................................................................ 12
Step 2: Set up and deployment of Out Stations ..................................................................... 14
Step 3: Switching on the Correlator........................................................................................ 15
Correlating ............................................................................................................................... 16
Main Menu ............................................................................................................................... 17
Correlate ..................................................................................................................... 17
File .............................................................................................................................. 17
Regression Analysis ................................................................................................... 19
Set-up ......................................................................................................................... 22
Test and Service......................................................................................................... 24
Other System Options ................................................................................................ 26
Correlation Screen................................................................................................................... 27
Pipe data..................................................................................................................... 28
Zoom........................................................................................................................... 32
Peak Suppression Screen .......................................................................................... 33
View Settings .............................................................................................................. 34
Calculate Velocity ....................................................................................................... 35
Filters ....................................................................................................................................... 37
Program upgrade (Software and Firmware)............................................................................ 40
Technical Specification............................................................................................................ 43
Warranty .................................................................................................................................. 45
Patents..................................................................................................................................... 45
MicroCorr Digital Users Guide
Introduction and Features
MicroCorr® DIGITAL is the latest model of the world’s leading correlator brand (over 4,000
MicroCorr® units in use worldwide) but is the first fully digital system. This enables it to
achieve performance levels well in excess of previous analogue-based systems, with
important benefits to the user.
• Totally digital system
• Superior leak detection performance on all pipe materials and sizes
• Quick and easy to use, especially for less experienced operators
• Automatic parametric filtering (APF)
• Ergonomically designed – lightweight, compact system
• 1/4 VGA colour display
• Software upgrades via Internet web site
• Optional third Out Station for velocity measurement and rapid survey
• Select dedicated or PC-based models
New features
• Transceiver communication enables all system functions to be controlled centrally,
enabling quicker deployment
• Expert system leak detection algorithms eliminate transient, non-leak effects
• Tricorrelation (optional third Out Station/sensor) automatically calculates sitespecific velocity
• Data replay function allows immediate post-processing or off-line correlation
• Software upgrades downloaded directly from www.palmer.co.uk
• Results transferable into Windows PC for post-processing or export
Best in the field
Leak detection staff require a high performance correlator in order to maximise their
productivity (number of leaks found per hour) and minimise the incidence of “dry” holes, when
excavation reveals no leak to be present. However, because it is used constantly in the field,
the correlator must also be robustly designed.
The Control Unit and Out Station are injection-moulded housings, providing maximum
strength and durability. They are designed to IP65 protection and to survive a 1 metre drop.
The Control Unit incorporates an external antenna and a magmount antenna (optional extra)
may be connected for longer correlation distances if the Control Unit is vehicle-based.
External antennae are used with the Out Stations.
All connectors are military specification and cables are fitted with strain relief to protect
against fatigue damage. The complete system, comprising control unit with two Out Stations
and sensors, is easily carried by one person. The Out Stations have been designed to be
visible over typical correlation distances and allow back-to-back portability.
Operational Benefits
• Pinpoints a higher percentage of leaks...
• ...and a significantly higher percentage of “difficult” leaks (plastic pipes, trunk mains, low
pressure situations)
• Fewer “dry” holes reduces excavation costs
• Improved productivity – more leaks found per hour
• Easier to use – less training required
• Improved reliability with less downtime
• Lightweight and robust
• Easily integrates into Company-specific reporting
• New software versions available from www.palmer.co.uk
• Ground microphone “foot” option to improve versatility
• Permalog “Patroller link” option to improve versatility
• Designed for easy portability
Fully automatic
• Immediate correlation – switch on and go (enter pipe details later)
• Automatic parametric filtering (APF)
• Velocity measurement using (optional) third Out Station/sensor
Easier to Use
• Colour graphical user interface
• Intuitive display and operation
• Quick correlation
• Batteries field-changeable
Reliability to inspire confidence
• All functions self-calibrated automatically on power-up
• In-built power management
• Increased battery life – batteries rechargeable and field replaceable
Principle of Correlation
In the "classic" correlation process, two sensors are deployed on pipe fittings ("dry"
connection) or connected to hydrants ("wet" connection). The sensors are positioned either
side of the suspected leak position. Noise is created by the leak as it escapes from the pipe
under pressure. This noise is conducted in both directions away from the leak through the
pipe wall (as minute vibrations) and through the water column (as a pressure wave). The leak
noise travels at a constant velocity (V), which depends on the material and diameter of the
pipe, and arrives first at the sensor nearer the leak. The arrival time at each sensor is
registered. The difference (Td) between the two arrival times, combined with knowledge of the
pipe type and length, enables the leak position to be calculated by the correlator. Depending
on the environmental conditions, accuracy of leak pinpointing can be to within centimetres.
Principle of correlation: L = ½ (D-(VxTd))
Leak position
V x Td
System Overview
Standard system configuration
The standard MicroCorr Digital system comprises
the following equipment:1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Control Unit
External Antenna for C.U.
Carry strap for C.U.
Red Out Station
Blue Out Station
2 x External Antennae for O/S
2 x Digital Sensors with cables
Headphones (for use with C.U. or O/S)
MicroCorr Digital PC communications
cable
Mains power supply/charger for 2 Out
Stations
Mains power supply/charger for Control
Unit
12V DC power/charge lead for C.U. or
O/S
Operating manual
Optional accessories
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
PC software (for upgrades, diagnostics, PC interface)
Spare battery pack with charge lead
Vehicle magmount antenna with cable
Digital hydrophones with cables (set of 2)
Leak noise CD
Digital microphone foot
Tripod or ground plate for accelerometer (magnetically attached)
Printer cable to standard Epson/HP printer
Rechargeable colour printer with batteries
“Tricorrelation” 3rd (yellow) Out Station and digital sensor, with antenna and
charge lead
Measuring Wheel
Soft carry bags for control unit and Out Station(s)
Hard transit case for all system components.
Permalog Patroller radio unit
Fully Digital Correlation
Digital sensor
• New sensor with improved sensitivity to low frequency noise (for plastic
and large diameter pipes and low pressure situations) - down to 1.0Hz
• Wider dynamic range than any previous sensor - can distinguish leak
noises much quieter than previous sensors
• True 16 bit Σ∆ ADC with 10kHz sampling
• Immediate digitisation of received signal
• Low noise electronics with digital protocol eliminates interference
• Longer sensor cables possible
Digital radio Out Station
• Two-way communication with control unit using transceiver technology
• Virtually no data loss, interference or distortion of the transmitted signal
• Single radio frequency for all Out Stations
• Improved dynamic range over analogue radios
• High speed data transmission using transform
coding techniques
• No directional restrictions
New digital sensor with enhanced low frequency
sensitivity
Features of the correlator unit
Large backlit colour display
with protective screen
Rubber hand grip
Tactile rubber keypad
Carry-strap attachment
Battery compartment
(accessed from underside)
Injection moulded housing
Headphone / charger
connector
External antenna / magmount
connection
Sensor
connector
Communications
connector
Features of the Out Stations
The Out Station consists of a transmitter unit (red, blue – or optionally yellow) and a digital
sensor unit complete with cable to connect to the transmitter. Its design incorporates sensor
stowage and cable wrap.
Detachable
antenna
Sensor
stowage
at rear
Military
specification
connectors
Flashing
hazard
lights
Cable with
strain relief
Injection moulded
housing
Digital
sensor
High
strength
magnet
Battery compartment
(accessed from underside)
Cable wrap
Rear of transmitter
On/Off switch with integral
flashing LED
Sensor stowage
Top view of transmitter – connector covers removed
Headphones / charger connector
Communications connector
Sensor connector
Antenna connector
Top view of transmitter – connector covers fitted
10
MicroCorr® DIGITAL correlator unit operational features
The unit performs accurate leak noise correlations for leak positioning and velocity
measurement. It has listening and surveying facilities and its stored information can be
downloaded to a computer or printer.
Key functions
On / Off
button
Up arrow
Enter button
Down arrow
Keypad
functions
abc
def
CANCEL
ghi
jkl
mno
pqrs
tuv
wxyz
MicroCorr Digital has an alpha-numeric keypad, similar to that of a mobile phone including a
full stop, cancel, enter and up/down arrows.
Navigation through the menus uses
combinations of these keys.
•
UP/DOWN arrows will select items from within a list
•
Numeric to select menu item
•
Enter to accept input
•
Cancel to move back a menu level.
11
Using the MicroCorr Digital Correlator
BATTERY WARNING
All three batteries supplied are rechargeable lithium ion. Do not short circuit these
batteries. Any misuse of these batteries may result in explosion or fire. They must not
be used in any other application or used with any other equipment.
Only
batteries/battery-packs supplied by Palmer Environmental must be used.
The Palmer sealed battery packs contain circuitry to prevent overcharging and
overdischarging.
Step 1: Charging and installing batteries
The battery packs for the correlator and the Out Stations are supplied as separate items and
will need to be fully charged although they are supplied quarter charged.
Two different battery chargers are supplied: one for the correlator and one for both Out
Stations to be charged simultaneously.
All three batteries are identical and are
interchangeable. Charging for all batteries takes up to 4 hours from flat.
Charging the Correlator
1.
To charge the correlator battery, the battery must first be fitted inside the correlator.
Unscrew these
3 quick-release
screws to
remove battery
compartment
panel.
2.
To insert the battery pack into the correlator unscrew the three screws underneath
the unit, remove the cover and packing foam and connect the battery pack, place in the
battery compartment, refit the packing foam, and then replace the cover with the three
screws.
3.
Connect the charge lead from the correlator charger to the headphone / battery
charge connector on the back of the correlator. Plug the charger unit into the mains supply
and switch on. The correlator will turn itself on and display the battery indicator as charging on
the correlation screen.
12
4.
To charge the Out Station batteries they must first be installed. To do this remove the
screws from the battery compartment on the bottom of each Out Station, connect the battery
lead to the connector and insert the battery. Refit the screws and attach the battery charge
lead to the headphone / charge connector on the top of the transmitter. The Out Stations will
turn themselves on to charge.
Unscrew these
2 quick-release
screws to
remove battery
compartment
panel.
Remember to turn control unit and Out Stations off after disconnecting charger cables.
Although the batteries are rechargeable, they may eventually need to be replaced. Only
batteries configured to the correct specification and type must be used. These are available
from Palmer Environmental.
TWO OUT STATIONS CONNECTED VIA CHARGER TO MAINS
13
Step 2: Set up and deployment of Out Stations
1.
Once the batteries have been charged and installed in the correlator and the Out
Stations, connect the antennae, connect a sensor cable and sensor to each Out
Station. Switch on each transmitter by pressing the On / Off button on the back.
2.
Transmitter switch functions
To switch the transmitter on, press the switch on the rear of the transmitter once
momentarily. The beacons will flash once.
To switch the flashing beacons on, press the switch momentarily again.
To switch the flashing beacons off, press the switch momentarily once more.
To switch the transmitter off, press the switch and hold it in for at least 2 seconds.
The beacons will flash three times before the Out Station turns off.
3.
Green LED functions
The switch incorporates a green LED, which provides the following functions:When lit constantly the transmitter is charging.
When flashing rapidly, the transmitter battery is almost fully charged.
When flashing steadily, the transmitter is switched on and performing normally.
When there is a long flash this indicates the battery is discharged and requires
charging.
Deploy each sensor on a water pipe fitting either side of the suspected leak position. The
sensor has a strong magnet that will enable it to remain in position on steel / iron fittings.
Always try to make a debris free contact between sensor and fitting for the best possible
results.
To check sensors are working correctly, connect sensors as normal to Out Station. Connect
headphones to the Out Station and listen while running your finger over sensor magnet. A
clear crisp noise should be heard.
14
Step 3: Switching on the Correlator
Switch the correlator on by pressing the On/Off switch momentarily. A number of system
tests are carried out on power up to ensure the correlator is fully functional. After a few
seconds the main correlation screen will appear on the display as shown below. Note, this is
the default screen on start-up to enable the operator to start correlating immediately. The
Main Menu screen is accessed by pressing Cancel.
To switch the correlator off, press the On/Off button and select 2, to switch off
To turn off the display only, press the On/Off button and select 1, to put into standby. (If
the correlator is not then used for 2 hours it will switch off). To reactivate the screen, press the
On/Off button again.
The top menu bar on the correlate screen shows information for each sensor by displaying in
the relevant colour (except Yellow appears black)
Indicates radio signal
is transmitting
Indicates radio
power setting
Indicates sensor
connected to Out
Station
Space where Yellow
Sensor information
would be displayed if
attached
Indicates battery
charge level
Control unit
information
Correlating function options
15
Date and time
In this situation the Red and
Blue sensors are being used,
they have communication
with the Base unit ok, using
low power
Correlating
The screen shown on page 15 is the first screen that appears on the control unit when it is
switched on. Once the ENTER key is pressed the system will begin to correlate. Correlation
can be stopped by pressing the ENTER key again.
This can be used for quick surveys without having to input any pipe data.
If the Enter key is pressed the control unit will start to correlate as shown below.
Date and time changes to
the run time of the
correlation
Press ENTER to stop correlation, to return to correlator function options
Signal to
Noise Ratio
Time delay
Scrolling arrows
shows correlation
is in progress
There is an option to select either the Correlate screen or the Main Menu screen as the first
screen to appear after turning on. This can be selected by using the Set-up screen (option 4)
from the Main Menu.
16
Main Menu
Correlate
See previous page for quick correlation instructions or Correlation Screen section for more in
depth instructions.
File
Enables the user to load previously saved files or save a current correlation. The control unit
can store approximately 30 files.
17
Press 1(Save) The following screen is displayed. The current correlation information details
can be typed and saved.
Press 2(Load) The saved correlation will be displayed. Arrow over the required saved file and
press 2.
Loaded file
name is
displayed
in green
From a loaded file the control unit can undertake post correlation. Correlating functions such
as pipe data, filters and peak suppression can be changed on the loaded data without having
to return to site to re-correlate. Using new information may correlate a different result.
Press 3(Delete) Deletes a previously saved file. Use the arrow keys to highlight the file for
deletion and press 3.
Press 4(Properties) Displays file information and comments, when the file was saved. Use
the arrow keys to highlight the file to view and press 4.
18
Regression Analysis
Regression Analysis provides an additional way of pinpointing leak positions by using a set of
correlation results, rather than an individual correlation result. This also provides a way of
measuring an accurate velocity.
The time delay / distance relationship of the correlation is linear, as the distance between a
sensor and the leak noise increases, the time taken for the sound to reach the sensor
increases proportionally with the distance. For example, if you move the sensor twice as far
away, the sound will take twice as long to reach it. It is this linear relationship that makes it
possible to predict values for varying time delays / distances when using a set of correlation
results.
Before the regression analysis feature can be used, correlation’s must have been saved on
the control unit. For an accurate result it is recommended to save three correlation’s, but
obeying the following two rules :-
One of the sensors must remain static during the collection of data. Which of the sensors
does not matter.
The pipe material and diameter must be constant for each of the correlation results. This
is validated by the control unit.
Blue Position
Red
Blue Position
Blue Position
Correlation Result 1
Correlation Result 2
Correlation Result 3
Press 3 (Regression Analysis) After correlation results have been saved. Press 1 to Add a
result, the file screen will appear, select the first correlation result saved.
The control unit will then ask for the “Static Out Station” colour. The control unit will store the
material and diameter of the first correlation result and compare with the next results to be
added, this ensures these details remain constant.
A regression analysis graph will appear showing time delay and distance. A cross will appear
on the graph plotting the first correlation result.
19
Then press 1 to add the second correlation result. A second cross will appear and a line will
pass through both. A result will be given on the leak position and velocity, but we recommend
the user add a third result for a more confident result.
Then press 1 to add the third correlation result. A third cross will appear and a best fit line will
pass through or near the three crosses. The result of the leak position and velocity will be
displayed under the graph.
20
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.
Press 6 (Information) Displays correlation information. After pressing 6, use the arrow keys
to select the cross on the regression graph for information to be displayed (a box appears
around the selected cross) then press ENTER
Press 7 (Remove all data) Removes all data currently being used on the regression graph,
you will be prompted to verify your selection.
Press 8 (Static sensor) Allows you to change the colour of the static sensor.
21
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. If set to RETAIN, in
survey mode, the filters will retain a set filter setting (set by the user) for every correlation
processed.
Press 3(Survey mode range) Toggles between 0.8, 2.4 and 4.0 seconds. Each of these
values provides the time delay range over which the correlator will correlate, where the times
in seconds shows twice the range. For example, over longer distances the 4.0 second range
should be used to give +2 seconds to –2 seconds. If entering pipe data, the survey mode
range automatically defaults to the appropriate setting.
Press 4(Correlation sensors) Toggles between the pairs of sensors to be used. Red-Blue,
Red-Yellow, Blue-Yellow, Base-Red, Base-Blue and Base-Yellow.
Press 5(Radio Mode) Toggles between HIGH power and LOW power. LOW power can be
used over shorter distances and HIGH power over longer distances or areas where a signal
can be interrupted by the environment. The correlator will always default to LOW power when
turning on.
22
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.
Press 4 to incrementally increase the screen contrast.
Press 8(Control beacons)
Note. The beacons should be
checked when switched on from the
control unit as they will only switch on
if they are within range to pick up the
signal.
Press 1 to switch On the flashing beacons on the transmitters.
Press 2 to switch Off the flashing beacons on the transmitters.
23
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.
24
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.
25
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. (This is only possible if the Patroller Link
radio has been purchased, not fitted as standard)
26
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.
The correlation shown has a SNR of 29:1. Signal to Noise Ratio (SNR) means the largest
correlation peak is 29x larger than any other displayed peak shown on the correlation graph.
Hence the larger the SNR the more pronounced the peak will be.
Press 1(Listen) Attach the headphones to the control unit before pressing 1. Use the arrow
keys to select the sensor required to listen to; BASE, RED, BLUE or YELLOW. The sound will
transmit in blocks of approx 20 seconds. To stop listening press ENTER, but note the sound
will continue until the 20 seconds elapses.
27
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.
28
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.
29
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. In this example, from the blue sensor the cast iron pipe was
entered first, the ductile iron pipe was second and the PVC pipe was third.
30
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. To restore to factory set
values see Test and Service menu.
31
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.
32
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. Press 1 again and the section of the data to be
suppressed will disappear from the correlation graph as shown below.
Press Enter to accept the data and a new correlation can be carried out without the
suppressed data. To replace the removed data press 2 delete.
33
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.
34
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. Unlike correlation, where the more central the leak is positioned between the
sensors, the more accurate the result. A velocity check requires the leak to be positioned
closer to one of the sensors to create a larger time delay.
The procedure for a velocity check is to position your sensors as described above. Induce
your leak or use the real leak. Correlate as normal entering the correct pipe data. After a good
correlation peak, stop correlating and press 8(Calc vel). The screen below will be displayed.
Enter the position of the leak from the RED Out Station.
If the leak is “In Bracket” between the sensors, then enter the distance from the leak to the
RED sensor. (In this example 92.7m)
If the leak is “Out of Bracket” to the left of the RED sensor, then enter the distance 0
If the leak is “Out of Bracket” to the right of the second sensor, then enter the distance
between the RED sensor and second sensor.
35
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.
36
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 3 (Change Filters) Displays a pox up box with four options :Quick set-metallic
Quick set-non metallic
Clear all
Manual settings
By using the arrow keys highlight the required option and press ENTER
Quick set-metallic removes all frequencies from 0Hz to 405Hz. So the sensors will only
listen to frequencies of 406Hz and above.
Quick set-non metallic removes all frequencies from 696Hz and above. So the sensors will
only listen to frequencies of 695Hz and below.
Clear all removes any filter settings set and will listen to all frequencies.
Manual settings allow the user to view the frequencies and set to the user preference.
The filter screen displays the frequencies heard at the two sensors in use. The bottom axis of
each graph displays the frequency level starting at 0Hz to the left. Two cursor lines are
displayed on each graph and are move by using the arrow keys. The longer dashed cursor
line is the current line selected to move. The lines on each graph will not cross. The position
of the current cursor line is displayed under the second graph, in this example 275Hz.
37
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.
In this example the cursor was moved to 257Hz and a low cut off was selected, so all
frequencies from 0Hz to 257Hz will be removed.
Press 2 (High cut-off) When the right cursor line is selected the high cut off option is
displayed. Move the right cursor to the required position and press 2. This will remove all
frequencies to the right of the cursor line. Removed frequencies are displayed in a cyan
colour. In this example the cursor was moved to 505Hz and high cut off was selected, so all
frequencies from 505Hz and above will be removed. By pressing ENTER to accept the data
would mean frequencies between 258Hz and 504Hz only are being used to process the
current correlation.
38
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. The
current correlation will now ignore frequencys from 81Hz to 105Hz but will use all other
frequencys.
Press 4 (Clear all) This clears all filter settings currently set.
Press 5 (Auto Filter off) This will toggle between Auto Filter OFF and Auto Filter ON. At
present this option is under development and will be released on a future upgrade.
39
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. The base unit requires both software and firmware to operate,
where as the Out Stations only require firmware to operate.
The application, the latest software and the latest firmware are all available as downloads
from the Palmer website www.palmer.co.uk/microcorr.htm
Once all the files have been downloaded to the PC start the MCD Updater Application and
follow the instructions as described below.
Click to
browse
Click to
browse
10
11
12
13
Screen description
The fields of the MCD Updater screen are described by number below.
Current System Information
1. This field gives the boot sector version within a base/out station and cannot be changed
by the user. It can only be used by Palmer engineers for system diagnostics.
2. This field gives the current firmware version within a base/out station.
3. This field gives the software version within a base station only, but will currently state
“Unavailable” before and after upgrading as the field is currently under development.
Note, this information can also be seen on the MicroCorr Digital information screen.
4. The ‘Update’ button is used to refresh the data in fields 1, 2 and 3.
40
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. This field gives the name and location of a software update file. These files have the
extension .mds and contain the required information to upgrade a system’s software.
9. This button is used to ‘browse’ for a software update file on a local/network file system.
10. This field displays version information about the file.
11. If there is a firmware and/or a software file selected clicking this button performs the
upgrade on the connected system.
12. This is a progress bar that indicates the progress of any running operation.
13. This button exits the application.
The File Menu
There is only one option in the file menu, which is ‘Exit’. Selecting this menu option closes the
MCD Updater application.
The Unit Type Menu
This menu allows the user to select the type of unit that is being programmed. The user can
either select ‘Base Station’ or ‘Out Station’.
The Port Settings Menu
This menu allows the user to select the communications port used by the MCDUpdater
application. In this menu there are 4 predefined options COM1 through COM4, and a user
defined port which allows the user to specify the port to use.
Important Notes for upgrading a MicroCorr Digital correlator (August 2003)
When using the upgrade program for the MCD the following points should be noted:
All of the correlation (.ked) files stored on the MicroCorr Digital will be deleted during the
upgrade operation. Therefore the user must save any required correlation files to a PC
before upgrading the software.
Once the upgrade procedure starts the power to the PC and the MCD should not be
interrupted, if it is the MCD will be rendered unusable.
1. Reboot your PC before starting, and ensure the Palmer Upgrade program is the only
application running, this ensures no other application can cause a break in the upgrade
procedure.
2. Ensure the MCD is connected to a charger that is switched on. This ensures a low battery
does not cause a shutdown.
3. Never try to interrupt the upgrade procedure once it is initiated.
41
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. Click on the ‘Update’ button to retrieve the current versions from the system.
5. Click on the ‘Browse Firmware’ and ‘Browse Software’ buttons and locate the firmware
and software update files. If only the software or the firmware is to be upgraded then only
select the required upgrade file.
6. Ensure that the update files are newer than those currently installed on the system. (The
latest version should always be used unless told specifically by your Palmer
representative that an older version should be used).
7. Click on the ‘Program’ button and wait for the operation to complete.
8. Remove the power and reset the system. Wait for the system to fully restart, then click on
the ‘Update’ button and verify that the software/firmware has updated successfully.
9. Switch the unit off completely and then switch back on again.
Upgrading an Out Station
The following steps should be followed to upgrade the firmware within an out station:
1. Connect the PC to the out 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.
3. Start the MCD Updater application and ensure that the ‘port’ is set correctly and ‘unit type’
is set to Out Station.
4. Click on the ‘Update’ button to retrieve the current versions from the system.
5. Click on the ‘Browse Firmware’ button and locate the firmware update file.
6. Ensure that the update file is newer than that currently installed on the system. (The latest
version should always be used unless told specifically by your Palmer representative that
an older version should be used).
7. Click on the ‘Program’ button and wait for the operation to complete.
8. Remove the power and reset the system. Wait for the system to fully restart, then click on
the ‘Update’ button and verify that the firmware has updated successfully.
9. Remember to upgrade both red and blue Out Stations and, if purchased, the optional
yellow Out Station.
Upgrade verification
To verify the latest versions of software have been successfully installed, go to the main
menu on the correlator and select “5 Test and Service”. Then select “8 Information”. This
shows the Information screen, which lists the software and firmware versions.
42
Technical Specification
Base station
Process
Frequency response
Filter selection
Full digital correlation
0.1 to 5000Hz
Automatic Parametric Filtering
Manual setting if required
±0.1m
Backlit colour ¼ VGA
External antenna/magmount
6 sections
Up to 30 files stored
Plug-in memory upgrade for >200 files
For all system units
Rechargeable Lithium ion batteries, field
replaceable
>24 hours continuous use without backlight
14 hours continuous use with backlight
Resolution
Display
Antennae
Mixed material
Correlation files
Battery level indication
Battery type
Battery life
Key functions
Combined correlation/survey mode
Listen (acoustic survey)
Frequency analysis
Peak suppression
Compute
Data replay for post processing
Velocity measurement (tricorrelation option)
User definable pipe types and velocities
Language
Operating software
Printer output
PC download
Dimensions
Weight
Operating temperature
Shock protection
Environmental
Enclosure
Connectors
Diagnostics
Selectable via menu
User upgradable from www.palmer.co.uk
RS232 to parallel printer
Via PC software, Windows compatible
220mm x 250 x 100mm
1.8Kg
-15°C to +50°C
Drop tested to 1 metre
IP65
Fully injection-moulded ABS
Military specification Amphenol
Self-test and auto-calibration on power-on
43
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
1.6kg
IP68
Fully injection-mouled ABS
Military specification Amphenol
Drop tested to 1 metre
Connections
Battery type
Battery life
Hazard indication
Antenna
Portability
Dimensions
Weight
Environmental
Housing
Connectors
Shock protection
Sensor
Type
Digital sensor with integral high strength
magnet
0.1 to 5000Hz
>90dB
180mm x 50mm diameter
1kg
IP68, rubber shroud for shock protection
2m cable with strain relief
Military specification connector
Frequency range
Dynamic range
Dimensions
Weight
Environmental
Connection to Out Station
44
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.
If any problems occur, notify Palmer Environmental Ltd or its authorised representative giving
full details of the problem, and the model and serial number of the equipment. You will
receive technical advice and/or shipping instructions depending upon the nature of the
problem.
Patents
Patents for the MicroCorr Digital are pending. MicroCorr is a registered trade-mark.
Note
Palmer Environmental reserves the right to change products, services or specifications
without notice.
Palmer Environmental Ltd
Ty Coch House
Llantarnam Park Way
Cwmbran
NP44 3AW
United Kingdom
Tel: +44 (0) 1633 489479
Fax: +44 (0) 1633 877857
email: info@palmer.co.uk
http://www.palmer.co.uk
Technical support: support@palmer.co.uk
45

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