www.nkrowing.com.au
4
The vertical spacing between the stroke sensor and the magnet assembly is critical. If the magnet passes too far from the
sensor the sensor may fail to register every stroke, resulting in low readings. If the magnet is too close to the sensor, it may
strike the sensor and knock one or both out of place.
Because the distance between the seat plate and the deck varies considerably from shell to shell, you should start by measur-
ing this distance. Refer to Figure 2.
1/2 Distance
of Seat Travel
FIGURE 1a: SENSOR & MAGNET INSTALLATION
(Sensor Installed on Centerline of Seat)
Sensor
Magnet
Cable Clip
Seat
1/2 Distance
of Seat Travel
FIGURE 1b: SENSOR & MAGNET INSTALLATION
(Sensor Offset Centerline of Seat)
Sensor
Magnet
Cable Clip
Seat
- If the distance measured as in Figure 2 is between 22mm and 28 mm, you may mount the sensor and magnet with no
further adjustment.
- If the distance measured as in Figure 2 is GREATER than 28 mm, you will need to make a spacer of appropriate thickness.
You may choose to shim the sensor or the magnet; whichever is easier. DO NOT use any magnetic material for your shim.
Many boat builders have shims designed to fit their particular seats.
- If the distance measured in Figure 2 is LESS than 22 mm, the magnet
and the sensor will interfere. Try mounting the magnet on the upper side
of the seat plate or the sensor on the underside of the deck. As a last
resort, you will have to remove material from either the seat or the deck
(this almost never needs to be done).
Check that the sensor cable is routed conveniently before mounting the
sensor. You can install the sensor and magnets semi-permanently by using
the 3M VHB (Very High Bond) tape supplied. Should you wish to make a
temporary installation, use electrical tape to affix the sensor. Use the alcohol
prep pad provided to clean the area of the deck to where you will attach the
sensor. Peel away the protective layers of the VHB double-sided tapes, and
firmly press the sensor onto the cleaned area of the deck. Wait 24 hours before
rowing to allow the VHB tape to fully cure.
Using the provided cable tie mounts, secure the sensor wire. If in the future
you need to remove the wire, simply cut the cable tie and later use a new one
to secure the wire.
Install the Magnet:
1) Remove and inspect the seat plate to find an appropriate place to mount
the magnet.
2) Clean the mounting location thoroughly with an alcohol prep pad.
3) Peel the liner from the VHB tape on the magnet.
4) Align the magnet on the mounting location and press firmly.
5) Return the stroke seat to its slide and check that the clearance between the
magnet and sensor is no more than 10 mm (refer to Fig 2). Check also that the
magnets pass directly over the sensor (refer to Figures 1a, 1b).
NOTE: On seats without a sliding carriage (such as shown in the photo), there
may be no seat plate for attaching the magnet. One option in this instance is to
place the flange of the magnet assembly on top of the axle tube and secure the
magnet with a few wraps of electrical tape.
FIGURE 2: SENSOR & MAGNET SPACING
Seat Plate
Deck
Sensor
Magnet
1 1/8" Max
7/8" Min
3/8" Max
3/4" Max
Center-to-Center
