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Sometimes the head wont fit correctly, is there a trick to get it to expand a little bit more to be able to fit into the viaflo?

how do you get your units on the stands for repair?

How long does it take to pull down temp when it’s 18 Celsius and set point is at -70?

VERY INTESTING THIS TYPE OF MACHINE GREAT

Do you have a rebuild kit or list of parts and suppliers?

Woah 😳😳

My name is Paulo Cezar Ziemer Rio de Janeiro.

Good afternoon, I am very pleased with your videos and they are very important for anyone who works in the field. I would like to know if you offer ultrafreezer classes.

Is this for sale?

terribel rolling

What is the purpose of expansion tank and in which stage it is installed? I would really appreciate your response

I have a labconco freeze dryer model freezone 4.5 and when I turn it on, ''pressure high mbar'' appears on the screen and it does not indicate any pressure value before or after turning on the pump. Nothing appears in the manual regarding this message. Does anyone know how to solve this error?

Do you know anyone who will service these instruments? I have one that needs to be calibrated due to skipping/cutting thick sections intermittently. Any advice?

Hi.... I have a burnt compressor in one of those ULT. Do I need to get the exact replacement or something similar could do?

Kozey Vista

I ms fron Rio de Janeiro Brasil

Good afternoon, I would like to know if you offer ultrafreezer classes?

Boa tarde meu nome é Paulo Ziemer e gostaria de saber como adquirir está tecnologia dos ultrafreezer para aplicar aqui no Rio de Janeiro.

Hi my name is Raju I'm allready it' s gas charging but 75.degre rech temperature not rechd -80

Hi my name is Raju i like yours Gas change cen i call you

thanks for all the helpful videos! Ive learned alot about how these things work!

So the two stages have different refrigerants. Stage 1 evaporator cools the stage 2 condenser via the heat exchanger? I think i understand it. A diagram would have been helpful as i don't understand how they can share components. Great video though, very interesting

How many hours need vacum for ult compressor

Basically using the evaporator of one system to cool the condenser of the other system.

That's why i have been getting so many service calls for attempted gasket changes. Why would you have the customer install the most important part of the box.... The sealing of the box....

Iam from India.iam also deep freezer ultra deep freezer service technician.our company mark -80 ultra deep freezers.. Mohammed Yousuf

Emailed you.

I have a hole in the first stage of an ultrafreezer, how do I solve it?

How to use

good

This HM355 you showed doesn’t have the counter, is this a setting you can turn on and off?

Como faco para ajustar setpoint e histerese

Great video - thanks! I've got a Revco Value Plus that runs for 10-11 minutes but quits within 2 seconds after the secondary compressor kicks in (when the low-stage LED illuminates on the main board). It does this every time I try it, requiring a power switch reset. The start relay for the secondary compressor looks fine. Any suggestions on what to test next?

I'm Henry Lamptei from Ghana, I need the email address please

Good evening, please I need your email address

Wow Thank you immensely for the thorough explanation! Your guidance on handling the 'Check the Bath' display has truly saved me from a lot of trial and error. Much appreciated!! ^^

I remember working on one of this Thermo ULT one time, but i do not remember what was the issue! I miss my old job working with lab equipment!

Good day, Sir. Actually we are now doing a research about 2 stage cascade refrigeration system too. And for the pairs of refrigerant, we tested 3 pairs for us to choose which is more suitable to attain a -80 C . May I ask on how we choose the best? what we need to considered? thank you

What is purpose of vaccum in cryostat

Deep freezer The purity of the R-170 is 99.5, 99.9. Which one do you use? And the purity of the R-290 is 99.5, 99.9. Which one do you use?

The purity of the R-170 is 99.5, 99.9. Which one do you use? And the purity of the R-290 is 99.5, 99.9. Which one do you use?

What is the sealant/ adhesive you use?

Error code: Invalid Insertion Solution please

WTF😤

Thank you sir for good detail information...now i understand how to 1stage and 2 stage refrigrant..good sharing..nice to meet you sir...

Hello, how do you weld the oil separator, what type of welding do you use? thank you

Great video but need to edit out the "uuummm" that I heard quite a bit. No hate ❤

Plz upload where cascade located My ult freezer chowking in 2nd stage