Palmer MicroCorr Digital Manual de usuario
1
MicroCorrDigital
Users Guide
Ty Coch House
Llantarnam Park Way
Cwmbran
NP44 3AW
United Kingdom
Tel: +44 (0) 1633 489479
Fax: +44 (0) 1633 877857
Email: [email protected]
Internet: www.palmer.co.uk
Mcorr Dig UG
Issue 5b August 2003
Based on SW-042-01-109a
Based on FW-042-02-107a
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MicroCorrDigital 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 MicroCorrDigital 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
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MicroCorrDigital 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 site-
specific 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.
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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
5
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 L L
D
6
System Overview
Standard system configuration
The standard MicroCorr Digital system comprises
the following equipment:-
1. Control Unit
2. External Antenna for C.U.
3. Carry strap for C.U.
4. Red Out Station
5. Blue Out Station
6. 2 x External Antennae for O/S
7. 2 x Digital Sensors with cables
8. Headphones (for use with C.U. or O/S)
9. MicroCorr Digital PC communications
cable
10. Mains power supply/charger for 2 Out
Stations
11. Mains power supply/charger for Control
Unit
12. 12V DC power/charge lead for C.U. or
O/S
13. Operating manual
Optional accessories
1. PC software (for upgrades, diagnostics, PC interface)
2. Spare battery pack with charge lead
3. Vehicle magmount antenna with cable
4. Digital hydrophones with cables (set of 2)
5. Leak noise CD
6. Digital microphone foot
7. Tripod or ground plate for accelerometer (magnetically attached)
8. Printer cable to standard Epson/HP printer
9. Rechargeable colour printer with batteries
10. “Tricorrelation” 3rd (yellow) Out Station and digital sensor, with antenna and
charge lead
11. Measuring Wheel
12. Soft carry bags for control unit and Out Station(s)
13. Hard transit case for all system components.
14. Permalog Patroller radio unit
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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
8
Features of the correlator unit
Large backlit colour display
with protective screen
Tactile rubber keypad
Rubber hand grip
Carry-strap attachment
External antenna / magmount
connection
Headphone / charger
connector
Injection moulded housing
Sensor
connector
Communications
connector
Battery compartment
(accessed from underside)
9
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.
Sensor
stowage
at rear
Flashing
hazard
lights
Cable with
strain relief
Digital
sensor
High
strength
magnet
Cable wrap
Battery compartment
(accessed from underside)
Injection moulded
housing
Military
specification
connectors
Detachable
antenna
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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
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