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Thats good news.

The testo is not an unrestricted path, it has a large bleed resistor incorporated to bleed of any stray voltages. You can measure it if you place a meter lead on the barrel and the meter body.

I guess there is a wire connected to the metal barrel of the sensors that takes the place of the manifold grounding wire they used to have so I was assuming path was thru the manifold.

Originally Posted by itsiceman

Doug you know if the new grounded thermistor temperature sensors from testo would give a unrestricted electrical path across the meter?

It shouldn't if the sensor is isolated physically/electrically inside the sensor.
Ours is inside the barrel and the thermistor is it a glass or epoxy bead???

Doug you know if the new grounded thermistor temperature sensors from testo would give a unrestricted electrical path across the meter?

Originally Posted by meoberry

That explains the crazy readings I was getting the other day. I switched from bead to old pocket thermometer almost throwed bead away but checked air temp and it was reading true. Good advice, thanks.

Meo.......the TC thing IMHO is a 'cheap' trick played on our industry but not a good one to get us viewed as professionals by using the proper equipment....
My apprentice had a 575VAC unit last week that dropped a phase and the we suspected the load side of the contactor on that phase was bleeding to ground.....on a 575 VAC "Y" system that meant that we had somewhere around 300 VAC 'bleeding' to ground.....
That means the copper pipes IF they were a poorer ground than YOU would have meant you 'bled' the power through you/the TC and the meter.....
That's why a thermistor IMHO is better and safer.....

Sent Russ an email on the 09/07/2011 about my SMAN3 and replacement parts came in today. Thanks for the fast reply and shipment free of charge.

Fieldpiece SMAN3

Hay Russell,
Does Fieldpiece plan on a four valve version of the SMAN3 and for that matter a wireless version since they seem to be moving in that direction with their accessory heads?
Thanks
Petie

Emailed Russ last night and he replied this morning to let me know new valves for my Sman 3 were in the mail.
What better service can you get.

Originally Posted by Doug Lockhart

RCB.....I sent out 24 of them for 6 months and got feedback from all of them.....I'll have manifolds soon to beat up in Beta testing....
Problem is all the big wholesalers are afraid to carry my product so my reefer company has to pay for all of this.....and I haven't embarked on a patent defense suit (yet) after having it's challenge held up in Canada and the USA....another $50,000 down the drain....
Remember, I'm a 3-4 man reefer company....not a big boy...I do this for the passion of my trade and the betterment of it/you....hopefully....and average 80-90 hours a week....between the two.

For what it's worth Doug I put some pressure on the boys in nanaimo (Wwg) last week for not carrying your product! I'll be meeting with the regional manager next week will do the same....

i can say the SMAN3 has been very very good to me!

Originally Posted by Doug Lockhart

Use a backup temp sensor to check against as the thermocouples are notorious (obviously) for taking errant voltages right of the copper pipes (static etc) and thus combining the voltages for a false reading. This is not to mention the fact that should you get a whack of static electricity hitting the 'bead' .... it has a direct conduit right into the PCB electronics to where it can either blow it and/or whack the operator.....that's why DC and Testo don't use TCs....

That explains the crazy readings I was getting the other day. I switched from bead to old pocket thermometer almost throwed bead away but checked air temp and it was reading true. Good advice, thanks.

lol Not to mention they can lose themselves in a tool bag real quick! The clamp will be a lot easier to keep up with. I hate fooling with the velcro strap. I picked up a cheap little plastic clamp at the hardware store with the rubber tips and glued a piece of the stiff pipe insulation on the end so I could clamp the bead TC to the pipes and not have to steal an ATC1 from the SMAN. Largest line I have to deal with is only 1 1/8".

Originally Posted by meoberry

The bead TC and velcro is what I have been using. Kinda makes you use foul language on yourself when you......Leave the @#$^ thing in the truck.......... LORD FORGIVE ME I DID IT AGAIN.........

Use a backup temp sensor to check against as the thermocouples are notorious (obviously) for taking errant voltages right of the copper pipes (static etc) and thus combining the voltages for a false reading. This is not to mention the fact that should you get a whack of static electricity hitting the 'bead' .... it has a direct conduit right into the PCB electronics to where it can either blow it and/or whack the operator.....that's why DC and Testo don't use TCs....

Originally Posted by Rcb2875

The ATC2 is about $60 and fits up to a 2 1/4" pipe. Other than that just a good old bead TC and velcro.

The bead TC and velcro is what I have been using. Kinda makes you use foul language on yourself when you......Leave the @#$^ thing in the truck.......... LORD FORGIVE ME I DID IT AGAIN.........

Originally Posted by meoberry

Does any body know if they make a bigger clamp for the sman 3. I work with larger equipment. Need one that will fit up to a 2 inch suction line without setting me back a days pay.

The ATC2 is about $60 and fits up to a 2 1/4" pipe. Other than that just a good old bead TC and velcro.

Bigger pipe clamp.

Does any body know if they make a bigger clamp for the sman 3. I work with larger equipment. Need one that will fit up to a 2 inch suction line without setting me back a days pay.

Originally Posted by knave

I am going to make a prediction here.

If the AK900 is what I hear it is...

Keep in mind that the tech's on H-talk are some of the most well-equipped, with tools and with knowledge.... and have more than a little influence within the companies they work for/own....

My prediction is that the supply house problem will go away within 6 -12 mo. after the AK900 is released....

Evan
You Da Man. I hope you're right buddy.

Originally Posted by Rcb2875

meh.. can't blame a guy for trying right!? Wish the best on rolling out the new unit and sooner or later the big wholesalers will either carry your brand or just lose out on a sale. I am happy with my SMAN3 set and the level of customer service they provide but I hear the same of your products and support on here as well. I plan on ordering another SMAN3 later for next summer and may throw in an AK900 or 1250 just for variety. Any ball park figures on how much the AK may retail for?

We've ripped apart quite a few other manufacturer's units and it's disturbing how many of them use "open" transducers where the silicone die is exposed directly to the refgt/oil/acid along with the connecting wires. There is also no or poor temperature compensation on the sensor itself.
We are getting back the crops that we sowed a decade ago by trying to get a Cadillac but only investing/paying for an Asian knock off.

We'll have a sub $300 c/w a ball valve manifold for our well known Digi-Cool quality. We'll not have a micron gauge built in as all of you know in the industry that vacuum reacts totally differently in a system and her micron gauge should be as far from the vacuum pump as possible.

Originally Posted by Doug Lockhart

Problem is all the big wholesalers are afraid to carry my product
<snip>
Remember, I'm a 3-4 man reefer company....not a big boy...I do this for the passion of my trade and the betterment of it/you....hopefully....and average 80-90 hours a week....between the two.

I am going to make a prediction here.

If the AK900 is what I hear it is...

Keep in mind that the tech's on H-talk are some of the most well-equipped, with tools and with knowledge.... and have more than a little influence within the companies they work for/own....

My prediction is that the supply house problem will go away within 6 -12 mo. after the AK900 is released....