Colored dot on the bottom of a HT1000

[KD8GWD]

Ive asked a few of my radio buddies and they dont know what it means, Can someone help me out? (Its a blue dot on the bottom...)

[Bob KB1MNE]

I'm just speculating but matching dots on radio and battery sometimes indicate that the combination is listed as "intrinsically safe" for use in potentially combustible atmospheres.

[Rayjk110]

The IS dot is Green, don't know about blue.

I see Canadian /\/\ auctions with 1 green and 1 blue sticker next to eachother on them, the same size as IS ones. Mebey it's a customs thing, I don't know.

[RadioSouth]

If it's an IS radio there should be a label in addition to the 'dot'.

[txshooter]

Ive asked a few of my radio buddies and they dont know what it means, Can someone help me out? (Its a blue dot on the bottom...)

I have never seen a blue dot on the base of a Motorola Radio unless it was put there by someone. A green dot as earlier stated would show the radio was intrinisically safe with a matching green dot on the battery. These radios will also have a seperate label marking them as intriniscally safe.

Post a picture so we can see what you are talking about and maybe we may have a better idea.

Someone else may have a better response on this, but from what I understand all of the Public Saftey Tier Motorola Radios are built exactlly the same including the ones that are marked intrinsically safe and that teh major difference is the certification process they go through to be labeled. Anyone else heard this or is this just another vicious rumor?

[motorola_otaku]

Someone else may have a better response on this, but from what I understand all of the Public Saftey Tier Motorola Radios are built exactlly the same including the ones that are marked intrinsically safe and that teh major difference is the certification process they go through to be labeled. Anyone else heard this or is this just another vicious rumor?

Truth. IS is pretty much just legal certification saying "your radio won't cause an explosion in our plant." If you rip an IS radio apart, you'll find that it uses 100% identical parts to its non-IS counterparts.

Now, your XTS3000Rs, on the other hand, are actually injected with an inert gas to keep moisture out. That's what the little spanner screw on the back of the radio is for.



Interestingly enough, a ruggedized XTS need not be IS-certified. I've seen 'em both ways.

[HLA]

IS radios are the same radio, the only difference is it's gone thru tests to guarantee that it's not gonna accidentily cause a spark or interfere with wireless detonators and things like that. but once the radio has been opened to be re-cased or worked on it's suppose to go back to be re-certified, it's not concidered IS anymore, you are not supposed to re-use the sticker if you re-case the radio. and as far as the dot on the bottom, motorola puts different colored dots on the bottom of the low line radios that you get at hunting stores and radio shack and if the dots match then the radios will be able to talk to each other. red is 151.625, purple is 151.955, blue is 154.570, and green is 154.600. but i've never seen one put on a ht like that. i'll bet somebody just put it on there, it's definately not factory.

[Vercomm]

Hi Guys,

I'm located in Canada and the "blue" dot on the bottom of the radio means that the radio is CSA(canadian standards association) intrinsically safe. Many oil companies in Canada are required to use radios that are CSA IS approved and not just FM approved. The blue dot on the radio means it is CSA and you will also require the IS battery, and the radio is to Tx no more than 2 watts. Of course if you don't wish to use the radio as IS, just put on a regular battery and turn the power up to 5watts.

Just to be clear the dot on the bottom is put their by motorola and means the radio is CSA certified IS. I think the American version is a green dot on the bottom of HT1000's.

[Grog]

Now that the post was answered with a correct & serious answer..........

I see Canadian /\/\ auctions with 1 green and 1 blue sticker next to each other on them

They are just bilingual

[Bruce1807]

In Europe the blue dot is the high end CENELEC approved radio. (there is also a green dot which is the basic IS)
Power maximum 1 watt (usually detuned)
When I lived in london we used to sell them to alcohol plants where
the workers walked around in space suits.
The specs claimed that you could change the battery in a methane saturated enviroment without the risk of an explosion.
When I delivered the systems I always said that whilst this is the claim I wouldnt do it!. They are also used incoal mines and other catagories that FM doesnt cover.



It is the European standard

[mr.syntrx]

Power limits for CENELEC/ATEX intrinsically safe radio depends on which standard the radio is accredited to. CENELEC EEx ib IIB T4 radios follow the 1W limit, but you'll also see ATEX Ex II 2 G EEx ib IIB T4 radios at 2W.

Radios I see in use in grain silos here are a mixture of FM IS and CENELEC certifications. (For those who don't know, the dust in grain silos creates a VERY highly explosive atmosphere. During a fire in a silo not far from here last week, a two mile radius of the reasonably small silo was evacuated.)

[Bruce1807]

Also used in mines and the Grain silos in the UK.
Hard to believe but at the corn flake factory they used CENELEC standard radios
Mt Isa in Oz also used CENELEC standard.

[KD8GWD]

Its definetly not something that has been added. I do believe that its a factory Motorola sticker... Next to it it says "See Radio Label" if that means anything...

[wavetar]

Its definetly not something that has been added. I do believe that its a factory Motorola sticker... Next to it it says "See Radio Label" if that means anything...

Your question was answered...I can confirm the blue dot here in Canada means intrisically safe to CSA standards. I can also confirm seeing many CENELEC MTS2000 radios on off-shore oil rigs & such with the blue dot as well. The 'radio label' refers to another sticker which should be located on the back of the radio, which would give the different classifications & groups the radio is approved for use under.

Todd