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Using Coxmate HC on an NK wiring loom

Simon Janes at Oxford is trying out the Coxmate HC. He is testing it on his NK wiring loom that is already in his boat.

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We got an enquiry from Simon Janes at Oxford about trying out the Coxmate HC. He wanted to test it on his NK wiring loom that is already in his boat.

Ive tried the HC unit with my NK speedcoach mount- it fits fine but the readings dont seem towork, the rate says 99 during the drive a more accurate number during the recovery, also the speed reading says Im doing 5 or 6 minutes per 500 (I hope it is the machine and not me!) I noticed on the back of the HC there are 6 pins but the NK holder only has receptors for 4 pins- my NK unit works with speed coah.gold.XL series, so have i done something wrong with the set up?
Cheers Simon

This is a really iimportant question for us to answer in full. The Coxmate HC is designed to work on the NK wiring loom. Interchangeability is really important and so we thought wed publish the full answer we gave Simon.

About the speed measurement.

The HC is designed to be used with the Coxmate micro-impeller. This spins much faster than your NK impeller and so when used with the NK impeller it gives very far out readings. You need to calibrate the HC against the NK impeller – you can set the HC unit up for NK impeller and use your Speedcoach K value. Do you have a marked distance you can scull and get a reading off? Then adjust the calibration as indicated in the manual.

About the number of connection pins.

The number of pins (6) on the HC is for the HC wiring loom which has a start / stop switch. This is in addition to the four on your NK loom. These four record and measure the same things on Coxmate as HC. Nothing wrong with your set-up.

About the rating. It suggests you are not getting a connection on seat sensor. Make sure HC is fully seated in mount. The seat sensor is the first and second pins from right – as you look down on mount.

About Rebecca Caroe
Rebecca is the host of RowingChat podcast and is a masters athlete and coach. Passionate about helping others enjoy the sport as much as she does. View all posts from Rebecca Caroe
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