What you might notice
You perform a thrust that feels strong, but the RN-1 records it as a lower force level than expected.

Why this happens
The RN-1 measures force in a single, straight-down direction through the contact point. If part of your thrust is directed off-axis (angled forward, backward, or sideways), that portion of the force is not captured by the device.

What to try
Focus on directing your thrust straight through the contact point.
A more vertical, aligned force will be measured more accurately and often with less effort.

Allowing the RN-1 to sit freely on a smooth surface can also help.
If the device shifts or slips during a thrust, it often indicates that some of the force is being directed off-axis.

Try with a pair of fresh alkaline batteries (not rechargeable batteries)
Make sure batteries are inserted in the correct way.

Batteries might be running low.
Or, you might be in a bright environment that makes the lights look dim.
Try replacing the batteries or moving to a less bright spot.
Rechargeables often don’t put out the same voltage as alkalines or lithium batteries and so lights appear dimmer.

Usually caused by a thrust that’s too light, or a double movement.

Battery power is too low for reliable readings. Replace with fresh batteries.