NK SpeedCoach OC 2 Quick Start Manual Download Page 2

WARNING!  LITHIUM-ION POLY BATTERY HAZARDS

Your SpeedCoach OC contains a lithium-ion poly battery pack. Lithium-ion batteries 
contain flammable liquid electrolyte that may vent, ignite and produce sparks when 
subjected to high temperatures or when damaged or overcharged. If ignited, batteries 
may burn rapidly with a flare effect and may produce irritating, corrosive and/or toxic 
gases, including toxic hydrogen fluoride gas, which may cause dizziness or suffocation. 
Contact with battery electrolyte may be irritating to skin, eyes and mucous membranes. 

•  Do not ever subject to fire or temperatures above 140°F | 60°C. NOTE: A car in hot 

sunlight may exceed these temperatures!

•  Do not charge, use, transport or store above 115°F | 45°C.
•  Do not charge below 32°F| 0°C.
•  Do not charge in direct contact with flammable items.
•  Do not puncture or open the unit.
•  If the unit’s internal battery pack is damaged, avoid contact with battery 

electrolyte, which may be irritating to skin, eyes and mucous membranes.

•  In case of battery fire, evacuate the area to avoid inhalation of fumes. If possible, 

cover the battery with sand to extinguish the fire or use a dry ABC- type 
extinguisher.

•  Allow good air circulation around top and sides of unit while charging. 

    SETUP MENU

From the Main Menu select Setup. From there, use the menu navigation steps described above to 
navigate, select, adjust and exit setup options:

BATTERY USE AND CHARGING

A fully charged battery will provide approximately 6-8 hours of operation, depending on backlight 
use. Each bar on the battery indicator represents 20% of battery life, or approximately 1.2 to 1.6 
hours. 
To charge your unit, press it firmly into the charging dock of your SpeedCoach OC charger until 
it clicks and you see “Charging ...” on the screen. The battery indicator will flash and the bars will 
indicate the charge status achieved. The battery indicator will show full and stop flashing after 90% 
charge is achieved, and the display will turn off when the unit is fully charged.  
The SpeedCoach OC can only be charged with the supplied charging dock. The SpeedCoach OC is 
compatible with any USB charging source, including your computer an automotive USB or a cell-
phone standby power source.  A SpeedCoach® XL charger will not charge a SpeedCoach OC.

Your SpeedCoach is equipped with a safety feature that will shut down charging if the 
battery is too hot or too cold. Do not charge below 32°F | 0°C or above 115°F | 45°C. If 
you receive a battery warning on the screen while the unit is within these temperature 
limits, immediately remove the unit from the charging dock and contact NK for  
service. Further attempts to charge may result in fire or permanent damage.

WORKOUTS 

(Training Pack Feature)

Run Last Workout: Runs the last workout. This is a quick way to repeat single distance or single time 
workouts without setting up intervals. 
NOTE : Press 

 to ready the workout. Workout will start when first stroke is detected. Press 

 

to pause a workout. Hold 

 to cancel a workout.

Single Distance: Select this option to run a single distance-based workout at the distance shown.   
Press 

, followed by 

 and 

 to adjust the distance. Then press 

 2x to run the workout.

Single Time:Select this option to run a single time-based workout for the time shown. Press 

,  

followed by 

 and 

  to adjust the time. Then press 

 2x to run the workout.

Intervals… 
Select this option to create a multi-interval based workout (e.g. time, 
distance, and/or rest periods).  You can select from the pre-loaded 
workouts or customize to create your own. Up to 6 custom workouts 
can be programmed. The SPC is loaded with 6 default workouts,  
which are editable. Please note:  Interval workout names are 
automatically generated based on the type of intervals performed.
Creating an Interval Workout 
First select a pre-existing workout to edit. Use 

 and 

 to  

select a field. Press the 

, followed by the 

 and 

 to 

modify the middle column. Press      

 again, followed by 

 

and 

 to adjust the right column value.  Press 

 return to field 

selection. Please note:  pressing the 

 will automatically SAVE 

and exit the workout when finished.

Countdown:  When toggled ON, a countdown timer will start 
when the first stroke is detected.   When the countdown reaches 
zero, the workout will begin. Tip:  The countdown allows the user  
to build to “race pace” before starting their workout.  If countdown 
is toggled OFF, the workout will start immediately when the first  
stroke is detected.
Intervals:  Determines the number of intervals in the workout.   
If you select Equal, all work intervals will be equal in type and 
value and all rest intervals will be equal in type and value.   
If you select Variable, you can create a multi-faceted workout 
of work and rest intervals that can each vary by type and 
duration.
Work: Defines the first work interval of the workout. Work can 
be time based or distance based. If more than one interval is 
being performed, a number will be added to this entry (i.e., Work1,  
Work2, Work3, etc).
Rest: Defines the amount of rest in between work intervals.  
Rest can be time based or distance based. The number shown 
to the right is the rest value per the unit shown.  Similarly if more  
than one rest period is entered in a variable workout, it will be  
followed by a number.
Number of Sets:  Select the number of sets of the proceeding interval workout to run.  For 
example if you have a workout with a work and rest interval, setting this to 2 will run this work 
and rest interval workout twice.
Rest Between Sets:  Only appears if Number of Sets is greater than 1.  Defines the rest period 
between a repeated group of intervals.  

WORKOUTS

SELECT

EXIT

Single Distance

Run Last Workout

Single Time
Intervals...

2000M

00:30:00

NEW INTERVAL WORKOUT

SELECT

EXIT

Countdown

OFF

Run Workout?

Intervals

Equal

Work

Dist

10S

1

100M

Rest

Time

Repeat?

00:02:00

1

Profile 
Adjust the units (lbs/in or kg/cm) then set your height, weight and age for accurate calorie burn 
information.
Display Setup 
Allows you to set the top two windows to display any of the measurements available. 

Accessory Setup

 

Select this option to pair your Heart Rate belt (TP Version only).

HRM Setup*

  Selecting this option will automatically attempt to pair the Heart Rate Monitor (HRM) Belt with the 

unit.  If more than one belt is found, you may need to change locations to isolate belt.   The HRM 
will automatically turn on when attached to your body.  The belt works best with moisture, so if you 
are not getting a reading, place some moisture on the rubber contacts of the belt before attaching 
to your body.  Once the belt has been paired with the unit, you will not need to pair in the future 
(unless you select Forget HRM or change belts).

Speed/Distance Setup 
Options are Speed mode or Split mode.  Speed mode will display your speed in the top left window.  
Split mode will display your pace expressed as a time to cover a distance. Units allows you to change 
the units shown for speed and distance (options are:  M, M/S, /500M, /1000M; KM, KMH, /500M, 
/1000M; or MI, MPH, /MI).
Input 

     

The Speed (and distance) Input setting can be set to GPS or Impeller.  Please note that you will need a 
wiring harness and impeller to use the Impeller mode. 
Auto Pause 
If toggled ON, the unit will stop the timer if it does not detect a stroke within the last 6 seconds.   If 
toggled OFF, the unit will not stop the timer even if no strokes are being detected.  If you would like to 
stop the timer manually, please select the 

 button to start and stop the timer manually.   Please 

note:  the unit will not Auto Pause during the Rest sessions of a Workout.
Auto Shutdown  
When Auto Shutdown is set to 10min, the unit will automatically shut off after 10 minutes of not 
detecting a stroke rate.   If the Auto Shutdown is set to OFF, the unit will only turn off when the user 
manually shuts the unit down.
NOTE: 

Average Speed is always calculated as a function of the distance covered in the elapsed time shown.  

Because the timer will continue to run while you are not rowing, turning Auto Pause “OFF” will impact the 

calculation of your cumulative average speed.

ADVANCED SETUP MENU

Impeller Calibration  
To change your Calibration Value or run the calibration routine (see below).

GPS Spd Smoothing, Strokes  
The Speed Smoothing feature will average the last number of strokes selected. If “2” is selected, for 
example, the Speed/Split displayed will be an average of the last two strokes, updated every stroke.
Stroke Rate Setup 
Options are Timer Start Acceleration, Noise Filtering and Axis. 

Timer Start Acceleration  
Governs the degree of acceleration that must be detected to start the stroke meter. The default value 
is 4. If you increase this value, a more forceful stroke is needed to start the timer. If you decrease this 
value, a less forceful stroke is needed to start the timer. 
Noise Filtering  
Governs the degree to which the accelerometer will register changes in acceleration as a stroke. The 
default value is 3. If you increase this value, more acceleration is needed to register a stroke. If you 
decrease this value, less acceleration is needed to register a stroke. 
Axis 
Allows you to select Front-Back (2) or Any (3).   Front-Back (2) is generally recommended for rowing 
assuming that the unit will be mounted perpendicular to the long axis of the boat.  If mounting at a 
non-perpendicular axis, the recommendation is to toggle to Any (3). 

Time and Date 
Used to change the format of the date and time displayed.  Please note: only time shows on the display, 
date will be shown on data recall screen. Please note in most U.S. locations daylight savings time is ON in 
the summer and OFF in the winter.
Diagnostics 
The Diagnostics screen  provides information about the performance of your unit’s GPS receiver, acceler-
ometer, HRM*, clock, and charging system.   This information assists NK tech support in case your unit is 
not functioning correctly.  

IMPELLER CALIBRATION 

Calibration is only relevant if you are using your SpeedCoach OC with a wiring harness and speed 
impeller. The Calibration Value is an adjustment factor that compensates for any difference between your 
impeller’s distance  measurement and the “standard boat” upon which the SpeedCoach’s calculations 
are based. Calibration applies only when in Impeller mode for speed and distance can average out any 
impact of current or tide to improve the accuracy of the calibration results.

Entering Impeller Calibration
Select “Impeller Calibration” from the Advanced Setup Menu.
Entering a Calibration Value Manually
If you know your boat’s SpeedCoach Calibration Value from previous calibration (it is the same for any 
SpeedCoach), you may enter it manually. From the Calibration Menu, press 

 to select the Calibration 

Value, then press 

 to adjust the value, and 

 to accept the value.

Running the Calibration Routine
The SpeedCoach OC does not need a measured course to be calibrated. Because the SpeedCoach 
OC knows both the GPS and Impeller distance measured, it can self-calibrate. Calibration simply 
involves rowing the selected distance in two directions. Your distance options are 500 to 1000M. 
Although a longer distance will somewhat improve the accuracy of your calibration, is  important to 
choose a calibration distance that you can row in a relatively straight line in both directions. Ideally, it 
will also have relatively consistent current throughout. The Calibration Routine requires that you row 
your course in both directions so the unit can average out any impact of current and tide to improve 
the accuracy of the calibration result through more comparison data.

If you wish to change your calibration distance from 500M, press 

 to move to the distance line, 

 to select, then  to 

 adjust and 

 to accept.

To run the calibration routine, press 

  to highlight Run on the Calibration Menu, then  

to select. From the calibration screen, press 

 to start each calibration leg and follow the screen 

prompts. On each leg, the land distance and water distance will count up until the selected distance 
is reached in the land distance window (bottom left). Note that there will be a three- or four-stroke 
delay at the start of each leg while the GPS and impeller readings are synchronized. At the end of the 
routine, the newly calculated Calibration Value will be displayed.  Press 

 to accept the new value 

and exit the  routine, or press 

  to exit the routine without changing your Calibration Value.  

At any time while running the calibration routine, you can press 

 to exit the routine without 

changing your calibration value.

SPECIFICATIONS

WEIGHT

Control unit and bumper: 5.2oz.(150 gm)

SIZE

Measures 3.6X2.6X1.2 in (92x67x31mm) with bumper.

BUOYANCY

Does not float. Use NK foam float.

WATER RESISTANT

Waterproof (IP-67)

MEMORY

25 hours of memory. Stores every stroke.

BATTERY CAPACITY

One rechargeable lithium-poly battery provides up to 8 hours of battery life.

BATTERY LIFE EXPECTANCY

After 300 full charge and discharge cycles, expected capacity is 80% of original.

COMPLIANCE

The SpeedCoach 

OC

 conforms with Council Directive 2004/108/EC (december 15, 

2004) on electromagnetic compatibility and is CE-marked accordingly.

ENVIRONMENTAL

The SpeedCoach 

OC

 is RoHS (reduction of hazardous substances) compliant and 

marked in accordance with the WEEE (Waste Electrical And Electronic Equipment) 
directive. Please do not dispose of the unit or battery in your household trash. 
Return to NK, an NK dealer or a designated recycling center for proper recycling and 
disposal.

ACCURACY

Speed: +/- 0.1 m/s;  Distance:  +/- 2.5 m over any distance.

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© 2018 Nielsen-Kellerman.   NK, Nielsen-Kellerman, SpeedCoach and the NK and LiNK logos are trademarks of Nielsen-Kellerman Co.

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