NK CoxBox Mode d'emploi

www.nkrowing.com.au

The Most Relied-Upon

Pocket Weather Instruments

in the World

Making Work & Play

Easier & Safer

COX-BOXTM SYSTEM

INSTALLATION, MAINTENANCE AND

TROUBLESHOOTING GUIDE

Thank you for purchasing this NK CoxBox. PLEASE take a moment to review these instructions before

installiation & use. Your CoxBox system should provide you with years of trouble-free service, but we are

always here to help if a problem arises. To order parts or accessories or obtain technical support, please

call 02 6258 9380. You may also e-mail questions to our support representatives at [email protected]om.au or

visit NK online at www.nk.com.au

www.nkrowing.com.au

COX-BOX OPERATION

On/Off

To use your Cox-Box, simply place the unit in the cup bracket and plug it into the wiring harness.Be sure to align the

plug and receptacle properly! There is an arrow molded into the rubber for help visually aligning the parts.The P5 can

be damaged because of frequent improper alignment.

The large knob turns the unit on and off, and controls the volume.Turn the knob clockwise to turn the Cox-Box on.

Find an appropriate volume so that everyone in the crew can hear the coxswain. Adjusting the speakers slightly may

help with this. Keep the volume as low as possible to prolong the battery life.

Pausing/Stopping Timer

If you do not want the timer to run, ﬂip the toggle switch up to“HOLD”—this freezes the time display—the rate

meter and counter will continue to operate.When ready for the timer to begin or resume, set the toggle switch

back to“RUN.” Putting the unit in hold is useful to start and stop the timer (for example, just prior to or immediately

following a race) or to pause the time (in between pieces or while turning).The timer will not start unless the Cox-Box

is in Ready Mode.

While the timer is running, the unit will store stroke rates in the memory.The data will not store if the unit is in“HOLD”

mode.

If any of these functions do not work properly, review each step of the installation, checking all distances

and alignments. Also review the“Troubleshooting”section for help pinpointing the problem.

If you still are having problems, please contact our Repair Department

on 02 6553 2473 or write to [email protected]m.au

Recalling the Memory

The Cox-Box unit will store stroke rates during a timed piece for up to 25 minutes and 40 seconds (81 points of

memory—in increments of 10 seconds for the ﬁrst minute [0, 10, 20…] then every 20 seconds thereafter).

Each time you push the toggle switch down, the unit will scroll through each of the stored data points.The increments

will continue until the time at which the unit was stopped or 25:40 is reached.

If the Cox-Box unit is turned off and back on again—the memory is not lost.To clear memory, you must press the

toggle switch down and hold it for at least ½ second.

Additional Information

Never attempt to repair the Cox-Box unit yourself. The units are specially sealed to make them watertight.

Breaking this seal often causes very expensive damage and will void the warranty. The only accessory that

we will repair is the microphone. We do encourage and will support experienced individuals to repair and

maintain wiring harnesses and speakers.

www.nkrowing.com.au

CARING FOR YOUR COX-BOX SYSTEM

Nielsen-Kellerman equipment is designed, built and tested to withstand the rigors of everyday use, but it is not

invincible and it can be damaged.The following information is intended to help you maintain your equipment and

prevent unnecessary repairs.

Charging

• Place the unit on charge whenever it is not in use, but do not leave the unit charging indeﬁnitely.The unit should

never be charged continuously for longer than 2 days.

• If the battery light comes on, be sure to charge the unit for at least 12 hours.

• Do not continue to use a unit with the low battery warning light illuminated.Repeated use with the low battery

light on may damage the batteries and unit.

• Under normal conditions, a fully charged battery should last at least 4 hours. If your unit is not providing this much

operational time, it may be time to return it to NK to have new batteries installed.We expect our batteries to need

replacement after three years of normal full-season use.

Care of Your Microphone

Your microphone is shipped attached to a headband and ready for use.The microphone is fully waterproof, and

may be fully immersed, but it will not ﬂoat on its own. Unless it is attached to a Cox-Box, the microphone will

sink. Microphones should be treated with care.

• Do not attempt to bend the aluminum boom or twist the mouthpiece.

• Do not drop the microphone.

• Do not yank or pull on the microphone cable when disconnecting from the Cox-Box.

• Do not tighten the bayonet connector on the microphone to the panel jack on the Cox-Box. Just slip it into

place.

• Do not carry the Cox-Box by the microphone.

Often, when a customer attempts to replace a microphone BNC, the

replacement connector pin is of an incorrect diameter and damages

the center conductor of the Cox-Box panel mount BNC.

NOTE: The NK warranty covers defects in materials and workmanship. It DOES NOT cover damage

caused by abuse, misuse, or attempts to repair the microphone on your own.

www.nkrowing.com.au

REGULAR MAINTENANCE SCHEDULE AND TIPS

Daily Maintenance

1. If you row on salt water, rinse the Cox-Box off with fresh water and dry it after every use.

2. Charge the unit whenever it is not in use, but do not leave the unit on

charge indeﬁnitely.The unit should not be charged for longer than 2

days straight.

3. Slip the metal microphone bayonet on the Cox-Box panel jack

without twisting to lock it. Do not tighten it fully.

4. Inspect the toggle-switch seal for integrity.This is especially

important if you row in salt water and wash your unit regularly.

Once a Month

This maintenance is easy to perform with a Cox-Box Maintenance Kit,

available from NK.

1.Wash the Cox-Box display panel with warm water and mild soap.

Rinse well and dry.

2. Use the drill bit from the Cox-Box Maintenance kit to clean out the metal sockets inside the rubber plug on the

unit. Rotate the bit inside the sockets to dislodge any dirt or debris.

3. Check the inside of the rubber plug on the wiring harness for any dirt. Inspect the wires leading to the plug for

any nicks or cuts.If these exist, contact NK about repairing them.

4. Apply silicone grease to the outside of the rubber plug on the Cox-Box.This helps to minimize the damage done

by repeatedly removing the unit from the boat.Try not to get silicone into the plug itself.

5. Microphone BNC and Panel BNC Connector:You can greatly reduce microphone static with regular maintenance

of these connectors. Use the provided small screwdriver to gently spread the contact ﬁns in the center of the mic

BNC.The Socket Maintenance kit includes instructions and photos of this step. Use the syringe to run a generous

bead of Nyogel on the inside diameter of the BNC connector on the Cox-Box panel.This grease will transfer to the

mic BNC when it is next connected.

6. Inject a small amount of electrical contact grease (Nyogel) into the sockets on the rubber Cox-Box plug. Connect

the unit to the harness.This will coat the pins with Nyogel and push some Nyogel deeper into the sockets,

protecting them as well.

End of the Season

1. Inspect the toggle switch seal. Perform this step before washing the unit.

2.Wash the Cox-Box with fresh water and dry it carefully.

3. Repeat the cleaning and lubricating steps under“Once a Month” maintenance.

4. Fully charge the Cox-Box then unplug it and store it in a cool, dry place.

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Inspecting the Toggle Switch

After several years of use, the gray rubber seal around the ON/OFF toggle switch may crack, tear, or otherwise

lose its ability to properly seal the switch. If this happens, water may enter the unit, potentially doing

permanent damage. Examine this seal regularly for any signs of splitting, tearing, or incomplete sealing

around the toggle lever when it is moved to the two extremes. If such damage is noticed, the unit should be

immediately returned to NK.

Battery Life

The life of your battery depends upon many things: the age of the battery pack, the volume and used by the

coxswain and the extent of charge. Here are some performance guidelines that should help you plan your

Cox-Box use.

• A fully charged battery will power a Cox-Box with NO audio (volume turned all the way down) for 16 hours.

• With the volume turned all the way up, the battery can supply power for 50 minutes of continuous talk.

• Therefore, with an average volume setting and a coxswain talking less than half the time, a fully charged

Cox-Box will provide at least two to three hours of power, and usually more.

• Having the Coxswain turn the volume down as low as possible will help prolong the battery life.

• A fully drained Cox-Box battery requires 12 hours on charge to attain maximum capacity.

• It is not necessary to try to discharge the Cox-Box batteries fully between charging— there is virtually no

memory effect in modern nickel cadmium batteries.

• If your Cox-Box unit is more than three years old, the battery performance will decrease. Simply return the

unit to NK for a new battery replacement.If you would like to determine the age and/or repair history of a unit,

please send an e-mail to [email protected]om.au

Avoid overcharging your Cox-Box. NK chargers are current-limiting and help prevent battery damage from

overcharging. However, leaving the unit plugged in for many days or weeks (past full charge) may still cause

damage. Please be sure to unplug and store your units during your off season breaks.

TROUBLESHOOTING

A Cox-Box system consists of four major components: the Cox-Box unit, the microphone, the wiring and the

speakers. All of these components must function for your system to work properly. If you are having a problem

with your system, the best diagnostic tool is to swap out each component, one at a time, with a working

component.When the problem disappears, you know you have pinpointed the trouble area.

If problems persist after checking the unit against this guide, please call our Repairs Department on

? 02 6553 2473 or e-mail [email protected]

www.nkrowing.com.au

Cox-Box Will Not Take or Hold a Charge

—Is the Cox-Box being charged correctly?

Review the“Charging”section under Maintenance above and conﬁrm that proper procedures are being

observed when charging the Cox-Box.

—Is the correct charger being used?

Our chargers are rated 12VDC and 300mA and are sent to the user with a special plug attached. We

recommend that all chargers be purchased from NK, and that you do not modify a charger purchased

elsewhere for use with a Cox-Box.

—Is the charger working?

• Is the red LED illuminated when the charger is plugged in?

• Is the charger warm? A normal charger will be very warm after less than one hour’s operation. If the

charger is not warm then it is not operating correctly. However, chargers can be warm, but not work

properly.

• Does the unit charge with a different charger? If so, then the ﬁrst charger is bad. If you suspect that your

charger is not working correctly you can perform the following test:

Obtain a multimeter—almost any type will do.Turn the multimeter on and set it at 20 VDC.After

plugging the charger in (be VERY careful, the charger is ON!),

place the positive lead from the multimeter on the plus pin,

and the negative lead from the multimeter onto the ground

pin.The multimeter should read between 13.5V -15V. Any

deviation from this range indicates that the charger is not

working. If you do not get any voltage reading on the multi-

meter, the internal transformer is damaged the charger must

be replaced.

—Have the batteries exceeded their lifespan?

A Cox-Box Battery is expected to provide 3 years of normal use (daily practices for approximately six to nine

months of the year). If you know your unit’s batteries are older than three years, we recommend that the unit

be returned to NK for new batteries and servicing. We can often check our records to determine the age of

your unit’s batteries.

NOTE: NK NO LONGER REPAIRS CHARGERS!

If you wish to repair a charger plug, you may obtain pins and instructions from NK. However, for most

people, the most cost- and time-effective approach is simply replacement.

ground plus

plus

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No Stroke Rate or Intermittent/Incorrect Reading

—Is the switch in the HOLD position?

If the toggle switch is in the HOLD (top) position, the unit will not read. Place the switch in the RUN (middle)

position.

—Is there a problem with the unit?

When there is no reading or there are irregular readings, the problem usually

lies with the sensor, not the unit itself.To test the unit:

• Turn the unit on; clear the memory and place in ready mode.

• Using a bent paperclip (unfolded into a“U” shape) repeatedly poke into

the two exterior holes of the CB plug (“A”& “D”sockets of the P5).

• The stroke rate should update every other poke. If this happens, the Cox-

Box is functioning properly and the problem exists with the rate sensor

in the wiring harness. Order a replacement rate sensor (NK Part No. 0212)

and install it according to the directions supplied.

• If the rate does not update during this test, check the sockets to conﬁrm that they are the same height

within the plug and have not been pushed into the plug.If the sockets have become recessed, gently use

a pair of needle-nose pliers to work the socket out to the same level as the other sockets.

• Use the Socket Maintenance Kit (NK Part No.0242) to clean any imbedded dirt or debris from the sockets

and inject a small amount of Nyogel into the sockets to prevent corrosion and ensure good electrical

contact.

• If the stroke updates, but the timer does not reset, clear the display with the toggle switch. If this does not

solve the problem, your switch may be faulty.

—Is the wiring intact?

Check the wiring for pin alignment and cuts or nicks.Check the sensor and seat magnet placement for proper

positioning and security.

No Audio/Intermittent Audio/Static

—Is the wiring clean of cuts or nicks?

Cuts or nicks in the wiring are the most frequent causes of audio problems. Be sure that all of the connectors

(pins, sockets, plugs, receptacles) are not damaged and are positioned properly.

—Is the microphone working properly?

The microphone may be the cause of failure.Test the system with a microphone you know is good. Note: A

damaged microphone often causes static.

—Are the connectors (pins, sockets, plugs, receptacles) properly positioned?

See installation.

—Are the speakers working properly?

Be sure all of the speakers are plugged in properly and are in working order (replace one at a time with a

known good speaker to test). If you are getting a loud squealing noise, try pointing the speakers away from

the coxswain to minimize feedback.

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Cox-Box Maintenance

If you row, cox or coach a coxed boat, you know the CoxBox is an important part of every practice or race. Though designed to perform in conditions that

would destroy most electronics in minutes, there are a few things you can do to help your CoxBox last longer and perform better. For every waterproof

electronic product, the connections are the potential trouble spots. NK sells a complete Cox-Box Maintenance Kit with everything needed to make it easy to

maintain the connections on your equipment. Follow these steps to keep your Cox-Box, Cox-Vox, Microphones & Wiring static-free and reliable for years.

Cox-Box Panel Connectors - MONTHLY WASH the Cox-Box panel with warm water and mild soap. RINSE well. DRY thoroughly

ROTATE DRILL BIT

inside metal sockets of

rubber P5 connector

to dislodge dirt and

corrosion and lift debris

out of sockets.

APPLY

ELECTRICAL

CONTACT GREASE

from syringe inside

metal sockets. Avoid

over filling sockets or

getting into rubber.

APPLY GREASE

from syringe

inside metal BNC

connector in a small

bead between white

conductor and metal

can.

USE FOAM SWAB to

apply SILICONE from

small plastic tub to...

OUTSIDE OF P5

until a visible film of

SILICONE covers

surface. (Keep foam

swab in provided bag

for future use.)

INSPECT rubber boot

around toggle switch

for tears or damage.

RETURN to NK if

any visible damage.

Tips to Help You Get the Most From Your Cox-Box

· Make sure that the CoxBox is carried by the handle, and NEVER by the microphone. After use, detach the microphone, and do not store the unit with the

mic attached. When attaching the mic to the CoxBox unit, avoid twisting the BNC connection down until it locks. Instead, connect the mic, and twist the

socket just enough to keep it attached.

· Keep your CoxBox clean by rinsing it off after use, ESPECIALLY if you row in salt water.

· Store your CoxBox in a cool, dry place. Avoid leaving it in severe heat or cold (such as the dashboard of a car or an unheated boathouse in the winter)

which can greatly shorten the life of the rechargeable battery pack.

CHARGING

· Recharging: Recharge a regularly-used CoxBox whenever possible to ensure that it will have enough power for the next practice. A fully drained CoxBox

battery pack requires 12 hours on charge to attain maximum capacity. At the end of the season, charge the unit for 12 hours, disconnect the microphone

and charger, and store in a cool dry place until ready to use next season.

· Memory Effect: It is not necessary to try to discharge the CoxBox batteries fully between charging - there is virtually no memory effect in modern nickel

cadmium batteries.

· Avoid Overcharging: NK chargers are current-limiting and help prevent battery damage from overcharging. However, leaving the unit plugged in for

many days or weeks (past full charge) may still cause damage. So PLEASE be sure to unplug and store your units during your off season breaks.

BATTERY LIFE

The life of your battery depends upon many things: the age of the battery pack, the volume and talkativeness of the coxswain, and the extent of charge.

Here are some performance guidelines that should help you plan your CoxBox use.

· A fully charged battery will power a CoxBox with NO audio (volume turned all the way down) for 16 hours.

· With the volume turned all the way up, the battery can supply power for 50 minutes of continuous talk.

· Therefore, with an average volume setting and a coxswain talking less than half the time, a fully-charged CoxBox will provide at least two to three hours of

power, and usually more.

· Having the Coxswain turn the volume down as low as possible will help prolong the battery life.

· If your CoxBox unit is more than three years old, the battery performance will decrease. Simply return the unit to NK for a new battery replacement. If

you're not sure how old your unit is, give the Service Department at NK a call and they can research your unit's serial number to tell you when it was last

serviced.

Visit www.nk.com.au for more maintenance and troubleshooting tips, or contact NK email support on [email protected]om.au

Microphone - MONTHLY or As Needed

GENTLY SPREAD GROUND CONDUCTOR "FINS" of the microphone BNC away from the center white insulator using the small

screwdriver. Aslight gap between the fins and insulators should remain. Slip the BNC onto the greased Cox-Box panel BNC to transfer

grease into the body of the microphone BNC. INSPECT cable for intact heat shrink and connection to BNC. Return to NK for repair

if there is visible damage.

REMEMBER! DO NOT lock the BNC ring when plugging in to the Cox-Box. DO NOT carry the Cox-Box by the microphone. DO

NOT bend the microphone boom, twist the mouthpiece or twist or yank the cable.

ROTATE DRILL BIT

inside metal sockets of

rubber P2 connectors

to dislodge dirt and

corrosion and lift debris

out of sockets.

APPLY ELECTRICAL

CONTACT GREASE

from syringe inside P2

metal sockets. Avoid

over filling sockets or

getting onto rubber.

USE FOAM SWAB

to apply SILICONE to

outside of P2 connectors.

Reconnect all P2/R2

connectors firmly.

Speaker/Harness Connectors - TWICE A YEAR (End of Season)

www.nkrowing.com.au

New from Nielsen-Kellerman: the Coxswain’s Kit. Everything

the prepared coxswain needs for practice. Kit Includes: Custom

Pack with pouch and external CoxBox holder, one adjustable

wrench, one 7/16” wrench, one 10mm wrench, athletic tape,

electrical tape, Blister Medic first aid kit, 2 Carabineers, a tube of

waterproof sun block and lip balm. NK PART 4050

With the growing use of licence free, 2-way radios, NK have made

available a special connector that allows a 2-way radio system to be

used through an existing NK Cox-Box or Cox-Vox system. The radio

to microphone ‘T’ piece connector fits on the BNC microphone

input of the amp unit. One end connects to a 2-way radio, the

other is used to connect the existing microphone.The coach (with

another 2-way radio) can then communicate to the crew discreetly.

With multi-channels available, it is possible for the coach to speak

to a number of crews at once or by switching channels, to just one crew individually.

Charge your Cox-Box from any car or truck cigarette lighter. Great when traveling to

regattas! CAR CHARGER – NK PART 0234 –

SILICONE GREASE – NK PART 0241 –Silicone is the proper grease for lubricating

all rubber plugs and receptacles in your Cox-Box system.This grease will ensure that

the plugs will connect and disconnect easily and will not swell or crack. Note: please

do NOT use petroleum jelly or other lubricants that may cause the rubber to wear

prematurely.

SOCKET MAINTENANCE KIT – NK PART 0242 –

NK developed this kit to make it easy for you to care for the

metal connectors inside your Cox-Box P5 connector as well

as the P2 connectors on the NK speakers.The kit includes a

specially sized drill bit for cleaning corrosion and dirt from

inside the sockets, as well as a syringe loaded with Nyogel

for injecting into the sockets. Regular use of these tools will

ensure long life and reliable performance of the connectors. One kit will allow you to maintain numerous Cox-

Boxes for at least a season.

www.nkrowing.com.au

LAY OUT THE PARTS OF YOUR SYSTEM

Uncoil the wiring harness and lay it out in the shell. If you are installing your COX BOX in a sectional

shell, the harness should be equipped with a plug/receptacle pair which should be within a foot of

the sectional bulkheads.

NSTALL THE STROKE SENSOR (CoxBox system only)

1. Refer to FIGS 1a, 1b. Note the position of the sensor – it should be close to the center of the

seat travel and it MUST be perpendicular to the length of the shell.

It is not necessary for the sensor and magnets to be centered between the rails as shown

in Figure 1a.They may be positioned off center as shown in Fig 1b. It is essential however

that the magnet passes directly over the sensor.

INSTALLING YOUR SYSTEM

Check that you received everything required. If you purchased a complete CoxBox system you should

have received the following items:

Carrying bag .......................................................................................................(1)

CoxBox (or Cox Vox) control unit ...............................................................(1)

microphone.........................................................................................................(1)

charger..................................................................................................................(1)

speakers............................................................................... (as ordered 2 or 3)

mounting cup ....................................................................................................(1)

harness, with sensor installed.......................................................................(1)

“Do’s & Don’ts” card..........................................................................................(1)

hardware pack with magnet ........................................................................(1)

NOTE: The double-sided “VHB” tape provided for mounting is epoxy based and requires 12 hours of cure

time. Do not get this tape wet while curing for best results.

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