Polatrak DEEP C METER 3000 AD User manual

CORROSION TESTING PROBE
Deepwater Corrosion Services Inc.
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DEEP C METER 3000 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
Can be used with
Polatrak’s optional
EFG probe

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Table of contents
1 Overview 3
2 Reference documents 4
3 Health and safety 5
4 LED readout components 5
4.1 Deep C Meter 3000 AD™ 5
4.2 Articulating mount 6
4.3 Flying leads 7
5 Probe unit components 7
6 ROV interface 8
7 Calibration 9
7.1 Deep C Meter AD™ calibration 9
7.2 Bucket calibration 10
7.3 Subsea calibrations 10
7.4 Online calibration 11
8 Operation 11
8.1 Mounting on ROV 11
9 Taking CP potential readings 13
10 Data interpretation 13
10.1 Removal from ROV 14
11 Maintenance and repair 14
11.1 Tip replacement 15
11.2 Electrode element replacement 15
12 RS232 functions 17
12.1 Data output 17
12.2 Control data input 17
13 Troubleshooting 19
13.1 General 19
14 Spare parts and accessories 21

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List of figures
Figure 1 - Overview 4
Figure 2 - Front of pressure housing 6
Figure 3 - Rear of pressure housing 6
Figure 4 - Articulated mount 6
Figure 5 - Flying leads 7
Figure 6 - SEACON RMG-3FS wiring diagram 15
Figure 7 - DC-II™ calibration wiring schematic 23
List of tables
Table 1 - ROV interface pin-outs 8
Table 2 - CP equipment pin-outs 9
Table 3 - Normal cathodic protection ranges
for bare carbon steel in seawater 14
Table 4 - RS232 Communication settings 17
Table 5 - RS232 Command list 18
Table 6 - Troubleshooting quick guide 20
Table 7 - List of spare parts 22
1. Overview
The Deep C Meter 3000 AD™ is a complete ROV-interfaced cathodic
protection monitoring system.
The system comprises ve basic parts:
1.1 LED readout
Triple voltmeters housed in a stainless steel 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 Power whip
Two-meter-long umbilical that interfaces with the ROV for power
and data output.
1.5 EFG probe (optional)
Can be added as an upgrade to the standard package.

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1.6 The Deep C Meter 3000 AD™ has the following upgrades from
previous versions:
• Smaller pressure housing
• Combines ROV-II™ and Polatrak EFG pressure housing
• Programmable ultra-bright LED displays with brightness adjustments
• Digital output (RS232 – standard ASCII string)
• ROV 24V DC powered, which eliminates the need to open the
pressure housing to change batteries
2. Reference documents
Please see the following pages for pertinent MSDS documents; Polatrak®
manuals are available at https://stoprust.com/resources/downloads/
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
https://www.parker.com/literature/O-Ring%20
Division%20Literature/SDS%20Olube.pdf
Figure 1: Deep C Meter 3000 AD™ components
Power
whip
LED
readout
Flying
lead
EFG probe
(optional)
ROV-II™
T-handle
mount
ROV-II™
contact
probe
Mount

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2.5 Dow Corning – 4 Electrical Insulating Compound MSDS – con-
nector sealant
https://3eonline.com/ImageServer/ImageVieweraspx?id=Ri81UOMdRx
GgoF4FuEjOkN0P3wEfJ3v7z4erMlZ0sppEvgQ6PDo5m1aHMUQjBI
HhdsvNZb983T3iNcJosE42sHXQec8cyVyFu525heZiq3Y%3d
PLEASE CONTACT YOUR DEEPWATER REPRESENTATIVE FOR
ANY QUESTIONS AND/OR ISSUES REGARDING THIS MANUAL.
3. Health and safety
It is the intention of Deepwater Corrosion Services that all proce-
dures will be carried out in a safe manner in accordance with the
Health and Safety At Work Act and any other relevant legislation.
If required by the client, Deepwater personnel will attend any site
safety induction courses before carrying out work on site.
4. LED readout components
The readout unit has three major sub-assemblies: The pressure housing,
articulated mount and ying leads.
4.1. Deep C Meter 3000 AD™
4.1.1. Pressure housing - The pressure housing is made from
316 stainless steel and is rated for water depths of 3,000 meters
(10,000 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. Remov-
ing the lens in the eld should be avoided whenever 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 nor-
mal 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

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on the top two display lines.
The lower display line is set
to ± 199.9mV DC. The meter
is powered by 24VDC nomi-
nal power but will function
between 8-36VDC.
4.2. Articulating mount
4.2.1. The articulating mount
is designed to secure the
Deep C Meter 3000 AD™ to
the ROV frame and provide
angled adjustment to opti-
mize camera viewing of the
displays. The mount and all
xing hardware are made of
316 stainless steel.
EFG
MCBH-3F connector
Uses male end of
cable #UWC0043
ROV-II
MCBH-3M connector
Uses female
end of cable
#UWC0042
Power, 24 VDC
and RS232
MCBH-4M connector
Uses female end of
cable #UWC0032
Figure 2: Front of pressure housing Figure 3: Rear of pressure housing
Figure 4: Meter mount (UWC0001)

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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 5: Flying leads
ROV-II meter side
(Female 3 pin)
EFG probe side
(Female 3 pin)
Pin 1 Black +24V
Pin 2 White GND
Pin 3 Red RX
Pin 4 Green TX
EFG meter side
(Male 3 pin)
Two types of cables for EFG:
UWC0047 Both sides male
DCM0061 One side male, one
female (as shown above)
Power lead
(Female 4 pin)
ROV-II
probe side
(Male 3 pin)
5. Probe unit components
The Deep C Meter 3000 AD™ utilizes the popular Polatrak ROV-II™ tip con-
tact probe. More detailed information can be found in the ROV-II™ opera-
tion manual Doc. No. 354-MN01-ENG.
5.1. Housing - The housing provides protection to the reference
electrode elements. It is made from a rugged thermoplastic and is
designed to t the compliant tee handle mount for convenient
manipulator mounting. The holes in the side allow the body to
become free-ooding and are specically engineered to allow for
accurate potential measurements.
UWC0049
UWC0041

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CAUTION
Do not cover or modify the existing holes or add additional holes
in the body.
5.2 Tail assembly - The tail assembly attaches to the main body
section with two (2) stainless steel ¼”-20 allen head cap screws.
The ROV-II ying lead passes through this unit and has a spiral
strain relief tting. The tail unit includes one male connector for
the contact tip and two female connectors for each of the reference
electrodes.
5.3 Nose cone w/ tip - The nose cone assembly is screwed into the
main body section. The cone houses the replaceable 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 stain-
less steel and plated with nickel; the nose cone is fabricated from a
rugged thermoplastic.
5.4 Reference electrode element - Two plug-in silver/silver chlo-
ride elements are included.
Electrode elements are accurate to ± 5 mV. See the operations and
maintenance section for instructions on electrode replacement.
CAUTION
Never handle electrode elements with bare hands or expose ele-
ments to a liquid other than fresh water or seawater, as perma-
nent damage may result.
RS232 cable (serial)
DB9 female connector pin out
Pin Polarity Cable color
2RX 232 Red
3TX 232 White
5Signal GND Black
Pin
1. Data carrier detect
2. Receive data
3. Transmit data
4. Data terminal ready
5. Signal ground
6. Data set ready
7. Request to send
8. Clear to send
9. Ring indicator
GND
DTR
TxD
RxD
DCD
RI
CTS
RTS
DSR
9
8
7
6
4
5
3
2
1
6. ROV Interface
Table 1: ROV interface pin outs

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7. Calibration tests
With all the parts connected, the probe(s) should be tested in a non-me-
tallic bucket as described in section 7.2 to verify that all components are
within calibration prior to deploying the ROV.
7.1. Deep C Meter 3000 AD™ calibration
7.1.1 Power-on the unit and allow approximately 5-10 seconds
for the automatic boot-up calibration process to complete.
7.1.2 Apply a known potential between 0.100V - 2.000V (battery
or portable power supply). Measure the potential directly with a
multimeter.
7.1.3 Measure the potential reading with the Deep C Meter 3000
AD™. These two potentials should be within ± 5 mV. If the dif-
ference is greater, send the calibration command through the
RS232 interface. Please see section 12.2 for further details.
4-pin bulkhead - MCBH-4M
(MCIL-4F male
connector)
Pin Polarity Wire color
1+24 Power VDC Black
2 Pwr/Signal GND White
3RX 232 Red
4TX 232 Green
42
3
1
Uses female
Polatrak cable
#UWC0032
ROVII - MCBH-3M (Male bulkhead)
(MCIL-3F connector)
Pin Polarity Meter Wire color
1Tip White
2Element 1 Top Black
3Element 2 Middle Green
Table 2: CP equipment pin outs
EFG - MCBH-3F (Female bulkhead)
(MCIL-3M connector)
1 3
2
13
2
Uses female
Polatrak cable
#UWC0042
Uses male
Polatrak cable
#UWC0043
Pin Polarity Meter Wire color
1 N/A White
2Element 1 Bottom Black
3Element 2 Bottom Green
Table 1: ROV interface pin outs (continued)

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7.2. Bucket calibration check (Please see figure 7 on page 23)
Contact calibration check
7.2.1 Fill a clean, non-metallic bucket or container with seawa-
ter approximately 16 –18 inches deep. Ensure that the bucket has
been completely degreased and rinsed.
7.2.2 Place the probe in the bucket with the tip at an angle to ll
the body with seawater. The entire probe, including the tip, must
be immersed. Ensure there is no trapped air in the unit.
7.2.3 Attach or stab the zinc coupon rmly onto the 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 sub-
merged. Ensure there is no trapped air in the probe. If the bucket
is too short, remove the tail assembly and place the electrode
directly in the water.
7.2.5 The bottom display line should be less than ± 2 mV. If not,
one of the electrodes may need replacing.
7.2.6 Activate the zinc coupon by removing a small section of
oxide lm with a le or rasp.
7.2.7 Place the zinc coupon directly in front of the probe.
7.2.8 The bottom display line should become more negative.
7.2.9 Remove the zinc coupon. The bottom display line should
return to the original value in step 7.2.5.
7.3. Subsea calibrations
7.3.1 While approximately 30 feet away from surrounding struc-
tures / assets, stab the isolated zinc ROV calibration coupon with
the probe’s contact tip.
7.3.2 The upper two display lines on the readout should read be-
tween (-) 1.030V & (-) 1.070V and be within 0.010V of each other.
Make note of this difference for future readings.

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7.3.3 If the EFG™ probe is connected, the bottom display line
should go more negative as the probe approaches the coupon
and become more positive as the EFG™ probe moves away. If the
EFG™ probe is not connected, the bottom display line should be
disregarded.
7.3.4 It is recommended that this test be performed at the be-
ginning and end of each dive, every two hours or at a pre-deter-
mined calibration period.
7.4. Online subsea check
7.4.1 While free-ying, the top and middle display lines are
reading the potential of the stainless contact tip. This number
will vary depending on ROV speed, time of immersion and wheth-
er a protected structure has been recently stabbed. Normally,
the reading will be in the (-) 0.200V to (-) 0.400V range. However,
both meters should be within 0.010V of each other. This number
should not be more negative than (-) 8.800V.
NOTE: If instrument fails calibration check, go to troubleshooting
section 13 in this manual.
8. Operation
8.1 Mounting on ROV
8.1.1 Create the power lead from the 4 pin open-ended cable
whip and splice on the required connector to interface with the
ROV MUX bottle. See section 6.0 for the correct pin outs.
8.1.2 Verify the whip has power and perform a loop-back test
before attaching the unit directly to ensure the data stream is not
corrupted. See Table 6 if communication cannot be established.
8.1.3 Find a good location on the vehicle to mount the Deep C
Meter 3000 AD™ and attach the articulated mount. Typically, the
display unit should be in view at the same time as the probe unit
to maximize efciency. Alternatively, a second camera can be
dedicated to the display unit. The LED readout must be visible by
the camera; also, having a light source directed at the lens for
optimal visibility is recommended.
8.1.4 If using zoom cameras, position the camera approximately

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12” away from the edge of the lens.
8.1.5 If using xed-zoom cameras, physically position the cam-
era 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 lead.
8.1.8 Insert the probe unit into the T-handle and position in a
manipulator or tool basket that is manipulator accessible.
8.1.9 If the EFG™ probe has been purchased, the unit can be
piggy-backed onto the ROV-II™ probe using the supplied brackets.
8.1.10 Tying a safety lanyard to the T-handle is recommended.
8.1.11 Ensure that lock rings for the ying lead(s) connectors are
properly mounted and secured.
8.1.12 Ensure that all fasteners are tight and the lock nuts are in
place on the T-handle.
8.1.13 Route the ying lead(s) in such a way that they will not be
stressed, entangled or pinched during manipulator operation.
8.1.14 Using the provided connector sealant, apply a small
amount to the shoulder of each ying lead(s) connector, ensur-
ing that no sealant is applied to the copper pin. Connect the
ying lead to the probe lead and tighten the connector lock
ring. Please refer to the MSDS in the appendix before handling
sealant. All appropriate Personal Protective Equipment (PPE)
shall be worn including safety glasses and gloves as a minimum
precaution.
8.1.15 Mount a zinc ROV calibration coupon on the ROV’s front
porch or manipulator in an area the contact tip can easily reach
during subsea calibrations.
8.1.16 Ensure the calibration coupon is electrically isolated from
the ROV (Over 1MΩ).
8.1.17 Remove the lens cover from the instrument.

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8.1.18 Perform a bucket calibration (see section 7.2).
8.1.19 Using a 7/16” (or 10mm) wrench, ensure that the contact
tip is tight on the nose cone.
8.1.20 Ensure that the tip is sharp.
9. Taking CP potential readings
9.1. Stab the contact probe onto the point on the structure where
the reading is required; when a good contact is made, the Deep C
Meter 3000 AD™ will show a steady reading.
CAUTIONS
• Avoid stabbing painted or coated surfaces; whenever possible, try
to take readings on bare steel or on spots specially designated for CP
measurement. CP stab points are typically labeled with “CP”.
• Anodes can be stabbed if necessary; however, it is always best to
stab the anode band where possible, as it is typically grounded to the
structure.
• Avoid trying to stab through heavy, hard marine growth if possible.
• The probe unit should be kept out of the mud to prevent contami-
nation of the electrodes.
• If the readings are not steady or do not match the criteria in Table
3, the most likely cause is a high-resistance contact. DO NOT RECORD
THESE NUMBERS. Continue to stab until readings stabilize and follow
the recommended action. See troubleshooting section 13 if 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 specied in Table 3. Exceptions may oc-
cur if the probe is stabbed onto an isolated section of a corrosion-re-
sistant alloy such as stainless steel, copper or nickel. In these cases,
Table 3 no longer applies and readings less negative than indicated
in the table may be noted. If this is the case, ensure that the readings

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are steady and the electrodes maintain the same potential difference
between each other during the last calibration check.
Table 3 - Normal cathodic protection ranges for bare carbon
steel in seawater
Range (mV) Interpretation Action
-500 or more
positive Error (unless unprotected)
Remake contact & verify
Measure two other points
around the component
-501 to -649 Isolated from cathodic
protection
Remake contact & verify
Record data
-650 to -799 Not cathodically protected
-800 to -849 Marginal cathodic
protection
-850 to -1049 Cathodically protected Record data
-1050 to -1149 Anode potential
-1150 or more
negative Error
Remake contact & verify
Measure two other points
around the component
Note: For brackish or fresh water, please consult Peterson’s Nomogram.
10.2 Removal from ROV
10.2.1 When equipment is removed from the ROV, wash thor-
oughly with fresh water and allow to dry. Soak the ROV-II™ and
EFG™ probe units in fresh water for at least one hour. Replace
lens cover on Deep C Meter 3000 AD™ and place it in the protec-
tive case provided.
11. Maintenance and repair
This section covers general operational maintenance; attempting
any tasks not described in this section may result in damage to
the system.

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11.1 Tip replacement
11.1.1 From time to time, it will be necessary to replace the con-
tact tip. Remove the old tip with a 7/16” or 10mm wrench. Ensure
that the new tip is tight, but do not over-tighten. (Max torque 50
in-lbs)
11.2 Electrode element replacement
11.2.1 Remove the probe from the ROV and un-mate the con-
nector. Install the dummy plug provided onto the exposed ying
lead connector.
11.2.2 Fill a clean, non-metallic bucket or container with sea-
water lled approximately 16 –18 inches deep. Ensure that the
bucket has been completely degreased and rinsed.
11.2.3 Put the probe into the bucket and stab or attach the zinc
to the contact tip.
11.2.4 The contact probe connector is a SEA CON® RMG-3FS
and is wired as shown below.
11.2.5 Using a digital voltmeter set on 2.00 VDC range, stab the
large pin socket (pin 1) with the positive voltmeter lead and stab
pin socket 2 (rst 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.
Pin socket 1: Contact tip
Pin socket 2: Reference electrode #1 (R1)
Pin socket 3: Reference electrode #2 (R2)
Figure 6: SEA CON® RMG-3FS female socket connector pin diagram

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11.2.6 Ensure that the probe is drained of seawater.
11.2.7 Take probe unit to a clean area. Do not handle the small
electrode pellets with bare hands.
11.2.8 Remove the two screws that secure the tail unit and gently
pull out the tail unit to expose the electrode elements. Try to avoid
un-mating the tip connector.
11.2.9 Visually inspect to ensure that the wire is not damaged and
the connector is properly mated.
11.2.10 Remove the bad electrode and discard.
11.2.11 Take the new electrode and carefully place a small
amount of silicone grease on the pin and sealing section of the
connector. Plug the new electrode into the connector.
11.2.12 Check that all connectors are fully mated and carefully
put the electrodes back into the housing and re-attach the tail unit
and nose cone.
11.2.13 Repeat the calibration check as described above. Allow
the probe to soak. (Note: A new dry element may take up to 30
minutes to reach equilibrium)
CAUTION:
Never immerse the connector pin of an electrode element in water.

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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:None
12.2 Control data input
The following functions can be accessed by sending commands
over the RS232 interface from within RUSS or through a standard
serial program.
(See table 5 on following page)

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Table 5: RS232 command list
NOTE: Do not include brackets <> when inputting commands.
Action Input command Modifier Response Result Example
LED
intensity
SI<intensity>!
Where intensity
is a hex number
between 0
and F
Sets the in-
tensity of the
LED display.
The bright-
ness is set
according to
the hexa-
decimal value
placed in the
intensity value
location.
There
is no
response
for this
protocol
The display
will change
intensity in
real time
with no ef-
fect on the
streaming
data.
Lowest
intensity
Command:
SI0!
Half
intensity
Command:
SI8!
Full intensity
Command:
SIF!
Data
stream
delimiter
SD<delimiter>! Sets the out-
put delimiter
in the data
stream to
the user’s
preference.
Separate with
commas or
tabs: (-1020,
-1020, 0.1)
(-1020 -1020
0.1)
There
is no
response
for this
protocol
The delimit-
er character
in the data
stream will
change to
the Comma
or Tab char-
acter in real
time.
Comma
separator
Command:
SD,!
Tab
separator
Command:
SDHT!
Analog
polarity
command
SP<polarity>! Sets the
polarity of
analog volt-
ages 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 ap-
proximately
20 seconds
There
is no
response
for this
protocol.
The data
stream
will be
interrupted
during the
calibration
process.
Command:
Cal!

www.polatrak.com
13813 FM 529 Rd, Houston, TX 77041 | US [phone] | Email: [e-mail]
©2023 Deepwater Corrosion Services Inc.
19SMB-006 Deep C Meter 3000 AD Manual Rev. 2
DEEP-C METER™ MANUAL
13. Troubleshooting
13.1 General
13.1.1 If the top and middle display lines are not within 5 mV
check the following:
• Repeat the bucket calibration check (section 7.2). The electrode
with the more positive reading is probably in error.
• Remove the reference electrode elements and replace with
spares, being careful not to touch the silver/ silver chloride pellet
with bare or greasy hands. Please see section 11.2 for details.
Soak for 30 minutes with new elements.
13.1.2 If the tip wire is damaged, a temporary soft-splice repair
can be made using ScotchKote® sealant (not included) and
splicing tape. However, prolonged operation in this manner is
not recommended. Order a new nose cone assembly as soon as
possible.
13.1.3 After any replacement or repair, recalibrate the instru-
ment by performing a bucket test as described in section 7.2.
If problem persists or is not listed, please call our hotline at
[phone] and ask for Polatrak technical support.

www.polatrak.com
13813 FM 529 Rd, Houston, TX 77041 | US [phone] | Email: [e-mail]
©2023 Deepwater Corrosion Services Inc.
20SMB-006 Deep C Meter 3000 AD Manual Rev. 2
DEEP-C METER™ MANUAL
Symptom Possible problem Action
Instrument will not
pass calibration
tests
(Section 7)
One electrode is bad See section 11.2.
Zinc coupon is passive (more
positive than (-) 1.000V) Remove zinc coupon and clean with le or sandpaper
Readings more positive than
(-) 1.000V Inspect the tip wire for any damage.
Electrodes are dry Allow to soak for 30 minutes and retry
Readings more negative
than (-) 1.100V Issue the Cal! command through the RS232 interface.
Both electrodes
reading low Tip wire damaged Remove probe tail assembly, unplug tip wire, remove nose cone, inspect
tip wire and repair with ScotchKote®
as a temporary measure. Order
replacement nose cone.
Readings are not
steady and continue
to change.
Poor structure contact Re-stab to ensure contact.
One reading
suddenly goes less
negative
Connector is ooded. Check connectors.
Lead wire (ying 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 improper shielding Ensure RS232 signal ground and power ground are tied together
subsea. Ensure RS232 signal
ground is connected topside.
No data stream
output Broken wire in whip Perform a loop-back test to verify communications. Visually inspect
whip for damage.
Incorrect port Perform a loop-back test to verify
communications.
Swapped transmit / receive Try swapping the transmit
and receive wires on topside
connection.
Voltage on transmission line Insert a null modem between ROV
and computer
Table 6: Troubleshooting quick guide