Products by Glas-Col

Frequently Asked Questions

We take thousands of phones calls every year with people asking questions regarding the operation of our equipment. the most frequently asked questions are presented here with the answers. If you have a particular question send the engineering department your question for a direct answer and maybe it will show up here.
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FAQ .

Temperature Controllers

My temperature controller keeps blowing fuses. What is wrong with the controller?

Why don't you have Over Temperature Protection build into your temperature controllers?

My controller is giving me a funny message when I turn it on flashing between "INPT" and "OPEN". What's wrong.

My temperature controller is giving me very unstable or erratic readings, it's not my thermocouple because it works great in my hand held digital thermometer.

Temperature Monitors

Can my Over-Temp Probe control the temperature of my reaction?

My Over Temperature cut off cannot not handle the power rating for my oven. Do you make a more powerful model?

My temperature monitor is giving me very unstable or erratic readings, it's not my thermocouple because it works great in my hand held digital thermometer.

Temperature Accessories

Why can't I bend my thermocouple to fit my reaction vessel?

Water flow Monitors

Is there an instrument that will monitor the cooling water through my condenser and shut off power and feed water flow if a hose breaks?

Vacuum Monitor/Controller

I cannot get my MW-1200A vacuum controller to control down to 1 mmHg?

GLOVE BAG™

Is your glove bag air tight?
Can you make a GLOVE BAG to my specifications?
Can I heat a reaction inside your Glove Bag.

Shields and Enclosures

Are your LAB GUARD® safety shields bulletproof?

Lab Devices

What's in a Lead Donut?

 

 

 

 

 

ANSWERS

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My temperature controller keeps blowing fuses. What is wrong with the controller?
This is a question we get most frequently. The first thing the user must understand is that blowing a fuse is the controllers way of telling them that they are over loading it. The general belief is that there something wrong with the controller. It's the heating load that's the problem or an improper rated replacement fuse. If you have made your own heater then I would consider that being the problem first. If you wish to test the controller to see if it has an internal problem then simply disconnect your heating load for the controllers outlet and make sure you have a good , properly rated fuse in the controller. Turn it on for a minute then turn it off and test the fuse. If the fuse is still intact then the problem is outside of the controller. Check with your electrician or the manufacturer of the device you are trying to power to make sure it is properly rated for the controller you are using.

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Why don't you have Over temperature Protection build into your Temperature controllers?
OK. This one is simple. What would happen if the primary controller not only controlled temperature but over temperature and it failed? You would have no over temperature protection. That is the only reason we design redundant system if to decrease the probability of a dual failure in the control function. Think about it. How many people would fly a commercial airplane if it had one engine?

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Can my Over-Temp Probe control the temperature of my reaction?
The Over-Temp Probe line of monitors was designed to act as a high temperature cut-off. These instruments will monitor a temperature and disconnect power to the heating device if the set point temperature has been detected. Unlike a controller they will remain in an inactive state until the user manually resets the instrument.

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Why can't I bend my thermocouple to fit my reaction vessel?
Our thermocouples are constructed inside a stainless steel sheath to protect it from the environment it is submersed in. Bending the thermocouple causes the thermocouple wire to stretch and break inside this sheath rendering the sensor useless.

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Is there an instrument that will monitor the cooling water through my condenser and shut off power and feed water flow if a hose breaks?
Yes. Our line of Water Flow Monitor™ has been designed to perform that task. these unit monitor the water flowing in your system and a set point can be adjusted to give a precise trip point for the power outlets. Power can be disconnected to heating devices and normally closed solenoid valves.

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I cannot get my MW-1200A vacuum controller to control down to 1 mmHg?
The MANO-WATCH 1200A has been designed to operate down to 1 mmHg but you must consider the accuracy of the controller itself and the sensor. These tolerances may prevent you from accurately controlling to ±1 mmHg let alone down to 1 mmHg. the user must also consider the pump being used on the system. Some pumps can actually pulse greater than ± 5 mmHg, this will cause the display to fluctuate. Finally there is always the problem of control itself. most people find the system overshooting and undershooting the set point. This indicates that to much vacuum and venting is being applied. One accessory design to limit that is our MVSA valve assembly. This has a solenoid plumbed in line with a needle valve to reduce the effective orifice size limiting the amount of venting or vacuum being applied during automatic control.

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Is your glove bag air tight?
The glove bag was never really designed to be air tight. It was designed to be inflated and contain messy situations. Although many glove bags will hold air for a period of time we cannot make the claim that it is air tight.

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Are your LAB GUARD® safety shields bulletproof?
NO! This is a question that has come up far too often. These shields were designed to offer a margin of protection in the laboratory from imploding and exploding glass vessels as well as splash protection. We have never tested them for ballistic impact nor do we ever intend to.

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What's in a Lead Donut?
You would not think this question to funny if you saw how many people pick up a lead donut and ask "What's in it? Is it magnetic?" Lead is in a Lead Donut. the outside covering keeps the lead contained so there are no problems with lead contamination.

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My controller is giving me a funny message when I turn it on flashing between "INPT" and "OPEN". What's wrong.
That's not a funny message at all, it's your controllers way of telling you the input is open. Most of the time this is due to an open thermocouple. Try replacing the thermocouple with a known good thermocouple. If that does not work it may be the electronics of the control module itself. In that case you will have to contact the factory. In very, very rare cases we have come across users that have managed to reset the program in the control module. In this case you will still have to contact the factory.

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Can you make a GLOVE BAG™  to my specifications?
It is difficult to modify the basic design of the GLOVE BAG™. We can do small modifications to suite your needs but these are handle on a case by case basis.

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Can I heat a reaction inside your Glove Bag?
We do not recommend that heat anything inside GLOVE BAG™. These chambers are manufactured with Polyethylene film and the melting temperature is very low (see the Specifications page). Even raising the temperature inside will weaken the material itself as well as the seams.

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My Over Temperature cut off cannot not handle the power rating for my oven. Do you make a more powerful model?
We have a series of Heavy Duty Relays on our website that can boost the power handling capabilities of the OTP and our line of temperature controllers up to 4800 watts. Look under temperature accessories for HRD-1 or HDR-2.

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My temperature controller is giving me very unstable or erratic readings, it's not my thermocouple because it works great in my hand held digital thermometer.
This is very common and users tend to assume that all is well with the thermocouple and the instrument is faulty. The reality is that neither is at fault. Hand held digital thermometers use grounded circuitry because they operate from a battery source, therefore the thermocouples used with them are usually grounded. All of our equipment uses ungrounded thermocouples that isolated the sheath from the circuit. Using a grounded thermocouple cause grounding loops inject stray noise into the input appear to the processor as temperature readings.

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Instruments for Research and Industry, Inc maintains the right to change, update and modify information  listed in FAQ without notice 

 
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