Palmer MicroCorr Digital Manuale utente

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: [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

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 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.

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 L L

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

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

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)

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

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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