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www.polatrak.com

   |   

13813 FM 529 Rd, Houston, TX 77041 USA

   |   

Telephone: +1 (713) 983 7117

   |   

Email: [email protected]

©

 2015 Deepwater Corrosion Services Inc. Specifications subject to change without notice

Deep C Meter 300 AD™

 operation manual

5

SMB-001 Deep C Meter 300 AD Manual

4.  LED readout components

The readout unit has three major sub-assemblies: The pressure housing, articulated mount and flying leads.

4.1. Deep C Meter 300 AD™

 

4.1.1. Pressure housing

 - The pressure housing is made from Delrin and is rated for water 

depths of 300 meters (1,000 feet). 

4.1.2. Lens

 - One end of the housing contains an acrylic lens that seals on the pressure housing 

with o-rings. Four stainless-steel screws keep the lens seated in the pressure housing. Access 

to the inside of the pressure housing is gained by pulling the lens. Removing the lens in the field 

should be avoided wherever possible.

4.1.3. Bulkhead connector - 

The back end of the pressure housing is sealed with three bulkhead 

connectors. These connectors thread into the back of the pressure housing and also seal with 

o-rings. It should not be necessary to remove these connectors during normal maintenance. Blank 

(dummy) plugs are provided and should be in place whenever the mating connector is removed.

4.1.4. Voltmeter module -

 The digital voltmeter module is located within the pressure housing. 

The module contains three independent LED displays. Default factory range is ± 2499 mV DC on 

the top two display lines. The lower display line is set to ± 199.9mV DC. The meter is powered by 

24VDC nominal power but will function between 8-36VDC.

Figure 2: 

Front of pressure housing

Figure 3: 

Rear of pressure housing

EFG

ROV-II

Power,

24 VDC 

and 

RS232

Содержание Deep C Meter 300 AD

Страница 1: ...B 001 Deep C Meter 300 AD Manual 2015 Deepwater Corrosion Services Inc Specifications subject to change without notice Deep C Meter 300 AD ROV mounted CP probe Operation manual ROV interfaced cathodic protection monitoring system Can output both contact and EFG probe readings Digital output RS232 standard ASCII string No batteries ROV 24V DC powered ...

Страница 2: ...Deep C Meter AD calibration 8 7 2 Bucket calibration 9 7 3 Subsea calibrations 9 7 4 Online calibration 9 8 Operation 10 8 1 Mounting on ROV 10 9 Taking CP potential readings 11 10 Data interpretation 11 10 1 Removal from ROV 11 11 Maintenance and repair 12 11 1 Tip replacement 12 11 2 Electrode element replacement 12 12 RS232 functions 13 12 1 Data output 13 12 2 Control data input 13 13 Troubles...

Страница 3: ...able 7 List of spare parts 15 1 Overview The Deep C Meter 300 AD is a complete ROV interfaced cathodic protection monitoring system The system comprises five basic parts 1 1 LED readout Triple voltmeters housed in a Delrin pressure housing 1 2 Contact probe Twin element tip contact CP probe Polatrak Model ROV II 1 3 Flying lead Three meter long umbilical that connects the probe to the readout 1 4 ...

Страница 4: ...sure housing to change batteries 2 Documentation The following documents are contained in the appendix 2 1 ROV II Operations Manual 354 MN01 ENG 2 2 EFG 1 Operations Manual 358 MN02 ENG 2 3 RUSS Operation Manual 358 MN04 ENG 2 4 Parker Seals Parker O Lube MSDS O ring lubricant 2 5 Dow Corning 4 Electrical Insulating Compound MSDS connector sealant PLEASE CONTACT YOUR DEEPWATER REPRESENTATIVE FOR A...

Страница 5: ...he inside of the pressure housing is gained by pulling the lens Removing the lens in the field should be avoided wherever possible 4 1 3 Bulkhead connector The back end of the pressure housing is sealed with three bulkhead connectors These connectors thread into the back of the pressure housing and also seal with o rings It should not be necessary to remove these connectors during normal maintenan...

Страница 6: ...C Meter 300 AD to the ROV frame and provide angled adjustment to optimize camera viewing of the displays The mount and all fixing hardware are made of Delrin 4 3 Flying leads 4 3 1 There are three leads supplied per kit each serving a unique function 4 3 2 A full wiring diagram can be found in section 6 0 Figure 4 Meter mount Figure 5 Flying leads ROV II meter side Female 3 pin EFG probe side Male...

Страница 7: ...placeable contact tip it also includes the female connector that attaches to the male pin on the extension cable from the tail unit Tips are made from stainless steel and plated with nickel the nose cone is fabricated from a rugged thermoplastic 5 4 Reference electrode element Two plug in silver silver chloride elements are included Electrode elements are accurate to 5 mV See the operations and ma...

Страница 8: ...he probe tip The upper two display lines on the LED readout should read between 1 030V and 1 070V and be within 0 005V of each other NOTE If the probe has not been used in the past 24 hours it may take 15 30 minutes for the probe to reach equilibrium EFG calibration check only applicable if using the EFG probe 7 2 4 Ensure both sets of holes on the EFG probe are submerged Ensure there is no trappe...

Страница 9: ... 8 1 4 If using zoom cameras position the camera approximately 12 away from the edge of the lens 8 1 5 If using fixed zoom cameras physically position the camera approximately 0 5 to 3 away from the edge of the lens 8 1 6 Ensure that all fasteners are tightly secured and in good condition Verify that all lock nuts and washers are in place on the readout unit mount 8 1 7 Connect and route the power...

Страница 10: ...f problems persist NEVER immerse the system with any connectors un mated unless the dummy plugs are installed 10 Data interpretation 10 1 For carbon steel structures in seawater the readings obtained should be within the ranges specified in Table 3 Exceptions may occur if the probe is stabbed onto an isolated section of a corrosion resistant alloy such as stainless steel copper or nickel In these ...

Страница 11: ...ltmeter set on 2 00 VDC range stab the large pin socket pin 1 with the positive voltmeter lead and stab pin socket 2 first clockwise of large pin with the negative lead note reading Then repeat stabbing pin socket 3 with the negative lead and note the reading The faulty electrode will be the one that gives the lowest least negative reading 11 2 6 Ensure that the probe is drained of seawater 11 2 7...

Страница 12: ...300 AD operation manual 12 SMB 001 Deep C Meter 300 AD Manual 12 RS232 Functions 12 1 Data output 12 1 1 Data string structure Stab 1 Stab 2 EFG For example 1034 1035 12 2 1034 1036 12 2 12 1 2 After each data set there is a line feed and carriage return present The rate is 2 data sets per second Table 4 RS232 communication settings Speed Baud 9600 Data bits 8 Stop bits 1 Parity None Flow control ...

Страница 13: ...n real time Comma separator Command SD Tab separator Command SDHT Analog polarity command SP polarity Sets the polarity of analog voltages being measured by the ADC There is no response for this protocol Positive character sets the common analog ground to the negative side of the converter Positive Command SP Negative Command SP Online calibration Cal Re calibrates the internal AD which takes appr...

Страница 14: ...flying lead is nicked Inspect and repair replace as necessary Displays are blank Whip is cut or power polarity is inverted Check cabling and wiring Displays are too dim or blurry Intensity is set too high or low for the available camera Increase intensity of light shining on meter Adjust the intensity using the command line See Table 5 RS232 Command List Garbled data stream output Ground fault or ...

Страница 15: ...0009 Lens O ring 2 4 GSK0008 Lens backup ring 1 2 FAS0107 Lens retaining screw 4 1 MFR0016 Lens cover 1 0 UWC0038 Power bulkhead dummy plug female 1 0 UWC0044 EFG bulkhead dummy plug male 1 0 UWC0045 ROV II bulkhead dummy plug female 1 0 UWC0041 ROV II flying lead 1 0 UWC0035 Power cable whip 1 0 UWC0061 EFG flying lead Optional Optional MLT0042 EFG probe Optional Optional MLT0026 ROV II probe nos...

Страница 16: ...manual 16 SMB 001 Deep C Meter 300 AD Manual Figure 7 Cell to Zn coupon ROV II calibration wiring schematic Calibration voltmeter display at 2 Volts DC setting Seawater solution Non metallic bucket Step VE VE DC scale Expected result 01 Tip Pin 1 Reference electrode 2 Pin 3 2 V 1 030 to 1 070 02 Tip Pin 1 Reference electrode 1 Pin 2 2 V 1 030 to 1 070 Zn calibration coupon Readings should be withi...

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