Setup FAQ

How far above the trailer roof should I mount the remote sensor?

Four to five ft. above the roof is sufficient.

What should I use for a pole?

The pole need to be 7/8 inch outside diameter (OD). You can use a telescoping fiberglass pole designed for Tractor trailer cleaning or pool cleaning. You can use a pvc pipe, or make an aluminum pole.

How long can the remote sensor cable be?

100 ft is the longest we recommend.

(AC2) Can I get a remote sensor extension cable (serial cable) locally?

No, even if the pin-out is correct you will not have sufficient ground for the sensors and your temperature and RH readings will be artificially high and erratic.

Can I put the antenna up near the remote sensor?

Yes, but you need to mount the antenna on a large piece of metal, at least one ft. square. This is called a reflective ground plane and will help you get the best distance on paging.

Can I make the antenna cable longer?

You do not want any total cable length greater than 35 ft. Even though we supply a quality low-loss cable, adding distance and connections will weaken transmit distance.

How do I mount the J20(AC2) J40(AC4x and 4xR)?

Use an electrical outlet box and cover designed for outdoor use (a deck or an RV) so the connections will be watertight when not in use. The covers can be either 2 separate flip ups or a full face flip up.

How do I orient the Anemometer (wind speed)?

There is a silver mark on the wind sensor that indicates zero degrees, or a direct headwind. For drag racing it should be aligned parallel to the track pointing downtrack. There is a diagram in the manual that illustrates this.


  • What Racers Say:

    "If you're running in the other lane, I'd prefer you get your weather off of the end of your finger .... but if you want to know what you are going to run before the lights come down on the tree, I'd suggest you have an Altalab in the trailer." Jeff White, Crew Chief NHRA Top Dragster