Coxmate SRT-std User manual

Coxmate SRT manual Oct 2008 1 of 2 Copyright 2006/7/8
Coxmate SRT User Manual
Both SRT–std and SRT–mag versions
1. Introduction
The Coxmate SRTprovides audio, stroke rate display and stop watch for cox’s. It is a
compact, low cost unit. It utilises the latest in digital electronics to increase battery life by
60%. The unit is available with adjustable magnetic mounting, or conventional mounting
plate. It is a part of the new ‘T’(tough) range. These are made to be tough to withstand
the rigours of rowing. The SRTcan be connected to an existing Coxmate or Nielsen
Kellerman® cable harness and speakers.
2. Getting Started
Charging Unit: Plug the charger unit in. Charging will take up to approx 12 hours if batteries are completely flat.
The display will flash indicating charge status e.g. ‘C56’, indicates the charge level is 56%. When fully charged the
‘Full’ will be displayed. It is good for batteries, if they can be fully charged and discharged for first two cycles. The
batteries may not have been used for some time and this exercising helps restore their capacity. Note: Unit will not
operate while it is being charged.
Fixing Mounting Bracket into boat: Determine position for mounting the adjustable bracket in boat. The exact
location will depend on shape/construction of boat and preference of cox. Examples for mounting are shown; The
first is for a stern coxed boat. The second is a bow coxed boat with the SRT fitted externally on bow cover. The third
shows the unit fitted internally under bow cover. The base of the mounting plate can sit facing up as in external
mounting shown, or facing down as with internal mounting shown. The mounting plate can be attached with either the
double sided tape, or the stainless steel screw sets provided. If you use the tape, make sure the surface is clean and
dry. An alcohol swab is provided for cleaning surface. Once plate is stuck, avoid applying any force on bond, until
tape has had a chance to ‘set’. The unit can still be used but care should be taken for ~24 hours.
The mounting bracket can be simply folded out of the way at the end of a rowing session; either to assist cox getting
in and out of boat, or to avoid mounting bracket getting in the way when boat is racked. For the version with
magnetic electrical contacts, connect the 4 pin rubber connector which is attached to the mounting bracket into
harness –this is only done once, and does not need to be disconnected/ connected each time boat is used.
Getting into boat: Place unit onto Mounting Plate. Once the unit is close to mounting plate, the magnets will take
over. The picture below left, shows the SRT being presented to mounting plate.
Plug microphone into ‘Mic’ socket. Press button to turn unit On. It will
briefly display ‘ON’ and then charge level eg ‘C56’. It will give a short beep
through speakers –this lets you know the speakers are connected. It will
then display stroke rating if seat sensor is activated, eg ’25.8’ means 25.8
strokes per minute. If there is no signal from seat sensor for 12 seconds
‘- - -‘ will be displayed.
To adjust volume, use ‘+’and ‘-` buttons. When these are pressed the
volume will be displayed temporarily eg ‘u67’(volume is 67%). Once set this
volume will be remembered, even if unit is turned Off/On. If you wish the
coach to talk to crew through speaker system, then connect output from radio
into ‘Radio’ input. This connection uses a standard 3.5mm jack plug.
The Stopwatch: The stop watch button starts, stops and resets timer. To reset timer, the button must be held down
for one second. If the stop watch button is pressed the display will show time for two seconds and then revert back

Coxmate SRT manual Oct 2008 2 of 2 Copyright 2006/7/8
to rate. If you want to display time continuously, press the [Display] button –this toggles display between rate and
time. The example display represents 3 minutes and 59 seconds.
If the timer is running whilst the rate is displayed, the timer status will be shown by the ‘:’ symbol. This
symbol flashes when timer is running, is steady when timer has been stopped and is not present if timer
has been reset.
To turn unit off: Removing unit from mounting base will automatically turn it off. The display will flash
‘SP’ for 3 seconds –indicating no speaker harness is connected. Alternatively hold the button down
for 1 second. The unit will display ‘OFF’ when it is off.
3. Battery Management
The unit is fitted with 8 x 900mAh NiMH batteries. The charging circuit automatically switches off when they
are fully charged. This means units can be left permanently on charge without causing battery deterioration.
Charge time is approx 12 hours and the operating time is up to 10 hours. This time will vary depending on
how vocal the cox is. The low battery indication is designed to come on with about 10% of battery capacity
remaining. If you want to check battery status of unit, turn unit on, and charge level, eg ‘C70’ indicating 70%will be
briefly displayed. When battery is very low and voltage drops, the amplifier will become distorted and ‘screech’.
To maximize battery life it is good for the batteries to be fully discharged and charged periodically –every 3-6 months.
This can be achieved by leaving unit ‘on’ and connected to cable harness. When the unit is not being used the batteries
will gradually loose their charge –it takes approximately three months to fully discharge.
When charger is connected to unit, it will be turned off. Unit will not operate whist it is being charged.
4.0 Maintenance and Fault Finding
The only routine maintenance required is the cleaning of the electrical connections, and the washing off of any
salt/impure water with clean fresh water. The contacts on both the magnetic mounting base and the unit should be
kept clean. Smearing a thin coating of silicone grease on these contacts will help prevent corrosion. These contacts are
magnetic and will pick up iron filings and other magnetic particles. These should be removed -a piece of sticky tape is
helpful for this.
The following is a list of potential problems with suggested actions:
PROBLEM
ACTION
No power up
Check unit is charged. If not, charge. If no charge indication, check charger either by trying a
different charger or measuring the voltage on charger jack plug –should be 14-22VDC in
centre referenced to the outside metal surface of the jack plug.
No audio output
Check volume setting is not 0%. Check speakers are connected. Remove unit from mounting
base. The resistance between the two contacts on right side of magnetic mounting base
should be between 2 and 4 ohms. Turn unit on with speakers connected. If there is a beep,
then problem is likely to be microphone. If microphone is not working it can be replaced.
No Stroke Rate
Check contacts on mounting base and unit are clean. Unit can be
checked by disconnecting 4 pin rubber connector from the harness,
and shorting the pins 1 and 4 with a paper clip or similar.
Screeching Sound
Batteries need charging.
Battery will not hold
charge
Check battery charger –14-22VDC in centre referenced to the outside metal surface of the
jack plug. If charger OK and batteries are more than two years old, replace batteries. These
should be same type as original ones, available from www.coxmate.com.au
If the above does not fix problem then contact local agent or email; [e-mail] with details. A response, in
normal circumstances, will be made within 24hrs.
Cox-Vox™ and Cox-Box™ are registered trademarks of Nielsen Kellerman®.
Dual Lock is trademark of 3M