Bushnell Velocity Speed Gun Problem

I just got my new Bushnell Velocity Speed Gun today. When I point it at a stationary object and pull the trigger, it will display between 80 and 85 mph.

When I point it at a moving object, it will display the current speed correctly. When I let go, it is supposed to display the highest speed it recorded during the time the trigger was pulled. However, mine will only display the highest speed about half the time. The other half, it will display 80-85 mph.

So, my actual questions are the following:

1. When I point my Bushnell Velocity at a stationary object, what is the screen supposed to display? 0 mph?
2. Is there a reason why mine only displays the correct speed after I release the trigger half of the time? Is there an easy way to fix it?

Hi,

Unfortunately, we have seen a few of these come through. Please contact our customer service department to work out an exchange for a unit that works properly.

We have just opened the first two of a batch of eight new velocity speedguns.
Both exhibit the same fault as that posted already - switch on; press trigger and 68 or 70mph appears.
Test with calibrating fork and correct speed is indictaed until trigger released when the display reverts to something obviously incorrect.
Three different sets of batteries tried (dry cells) same result.

However, by replacing the batteries with a pair of NiCads, correct operation results.

I suspect that this is due to the lower terminal voltage of the NiCads - 2 x 1.3v = 2.6v total as compared to the dry cells 2 x 1.5v = 3v total (actually a tad more).
We are going to unpack and test the other six in the batch and will keep you posted.
Barry Morse. South Somerset Community Speedwatch Data Manager
email: southsomerset.csw@hotmail.co.uk

This is very interesting. Please keep me updated with the other models. With this in mind, I will have to do some other testing as well to see if this corrects the majority of the units that are returned for this reason.

I have tested several more radar guns that were returned for these erroneous readings. As it turns out, they all work perfectly with rechargable batteries. This seems to be more of an amperage problem than a voltage problem. You can draw more amperage from a rechargable than from an alkaline. Whatever has recently changed about the radar gun, it is trying to draw too much current. We are currently wrking with Bushnell to find a solution.

Also, can you please verify, were these the Velocity or the Speedster II model?

How do I find out if my gun is correct. I just read Ni cad batteries are probably better. On the 15 of March, I was reading one speed and this other coach with and orange gun was reading about 6 mph faster. How do I find out if my gun needs calibration? My gun is about 10 months old.