Tag Archive | "maintenance"

CETCI’s New 3D Printed Calibration Clip Leaves Both Your Hands Free!


At Critical Environment Technologies Canada Inc, (CETCI), we strive to be innovative, cutting edge and creative in our endeavors to fulfill our customers’ needs. Our latest testament to this is our newly designed calibration clip (or ‘Cal Clip’ as it is called for short). It has been an exciting few months as we have gone through different designs, prototypes, various types of plastics and calibration testing.

Remember the last time you calibrated one of our gas detectors that had a splash guard? The blue or orange calibration adapter cup that you had to hold with one hand over the splash guard while trying to open the gas cylinder with the other, flow gas and keep the cup snug up against the device? And depending on the location of the detector, acrobatics may have been involved, right? Well, those days are gone!

Our engineers have designed a device that easily clips around the splash guard and remains in place by itself, freeing up BOTH your hands to do what they need to do. Perhaps even give a high five to a coworker!

before-now-cal-clip

 

The Cal Clip is made of light, durable ABS/polycarbonate plastic and comes in our signature blue company colour. It is specially designed to allow calibration gas into the sensor vent through a small barb hose fitting attached to standard or Teflon tubing. The barb hose fitting can accommodate two sizes of hose: 1/8” (3.175 mm) ID and 3/16” (4.762 mm) ID. While stored, the tubing can be left attached or removed from the Cal Clip as desired.

The Cal Clip fits around the circular, black splash guard that is factory installed at the time of order on any of our black enclosure gas detectors or self-contained controllers. With the hose barb fitting at the bottom, pointing towards you, simply place the inside edge of the Cal Clip next to the outer edge of the splash guard and gently flex open the top of the other side outwards until it slips and clips around the entire splash guard. To remove, gently open the clip at the top while pulling one of the hooked ends towards yourself and it will slip off. If you pull the device apart too aggressively, overstretching it, the circular formation of the Cal Clip may be compromised. Evidence of this results in whitish bars appearing on the blue plastic (like stretchmarks).

NOTE: Because the Cal Clip is designed to prevent entry or exit of air except via the hose barb fitting, it must be removed from the splash guard during normal operation or else the gas readings will not be accurate.

About Critical Environment Technologies Canada Inc.

Critical Environment Technologies designs and manufacturers indoor air quality and fixed gas detection systems including self-contained systems, controllers and analog and digital transmitters. Applications include commercial HVAC, institutional, municipal and light industrial markets worldwide. Many of these applications are for vehicle exhaust, but areas of specialization include refrigeration applications, food processing plants, manufacturing plants, wastewater treatment plants, fisheries, wineries/breweries, pulp and paper mills, recreational facilities, bakeries, greenhouses, and many more.

For more information about our products, check out our website at www.critical-environment.com or to discuss a tailored gas detection solution for your application, contact us at 1-877-940-8741.

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How often do gas cylinders need to be replaced?


Gas cylinders are made by many different manufacturers, are available in a variety of sizes, can be disposable or refillable and filled with a low, high or pressurized concentration. Generally speaking, the shelf life of calibration gas, (also known as span gas), is dependent on three factors:

  1. Gas Type
  2. Gas Concentration
  3. Gas Cylinder Quality and Size

1. Gas Type

Calibration gases can be divided into two types: reactive and non-reactive. “Reactive” is a broadly used term for chemicals that have some instability under certain conditions and may react with certain materials, moisture, oxygen or other chemicals. Reactive gas mixtures include gases such as ammonia (NH3), chlorine (Cl2), hydrogen sulfide (H2S), sulfur dioxide (SO2), hydrogen chloride (HCl), hydrogen cyanide (HCN), etc. Reactive gas mixtures are normally filled in aluminum cylinders with stainless steel valves that have been treated to minimize reactivity with the reactive gas. These mixtures have a shorter shelf life, typically 6 months to one year, because the concentration of the reactive gas is likely to dissipate over time.

“Non-reactive” is a broadly used terms for chemicals that are stable under most conditions and are not affected by moisture, oxygen or other chemical interactions. Non-reactive gas mixtures include alkane or alkene hydrocarbons (methane (CH4), propane (C3H8), hexane (C6H14), isobutylene (C4H8), etc.), nitrogen (N2), hydrogen (H2), carbon monoxide (CO), carbon dioxide (CO2), etc. Non-reactive gas mixtures are normally filled in steel cylinders and typically have a shelf life of about 3 years.

2. Gas Concentration of Reactive Gases

In some cases, a higher concentration of a reactive gas can have a longer shelf life than a lower concentration. In low concentrations, a few reactions can have a much larger effect on the overall composition of the mixture than the same reactions in a highly concentrated mixture.

3. Gas Cylinder Quality and Size

A well-made gas cylinder will have, on a microscopic level, the smoothest interior walls as possible. If the walls are rough, it allows the gas to come in contact with a larger surface area which increases the likelihood of a reaction with contaminants or the cylinder material itself. The quality of the internal walls and the material of the valves are both factors that affect the shelf life of reactive gases. In addition to the quality of the materials, larger, high pressure cylinders allow for longer shelf life because the ratio of the internal wall surface to gas volume is substantially less and thus there is less potential for a reaction.

Regardless of the type of gas mixture, cylinders that do not bear a legible written, stamped or stenciled identification of the contents should not be used. It is also important to note the expiry date and not to use the gas past that date. If an inappropriate amount of calibration gas is used or if expired gas is used during calibration or bump testing, the result could be improper calibration and may result in a potentially dangerous situation.

For suggestions on gas detection systems, indoor air quality monitors and calibration, please visit www.critical-environment.com

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Six Factors to Consider Prior to Choosing an Electronic Enclosure Pt. 6 of 6


Choosing the right enclosure maybe as important as selecting the right product. An electronic enclosure, also known as housing, helps protect the circuit board allowing it to function properly. Elements (e.g. water, wind, dust, dirt, heat, cold, humidity, and chemicals) in the surrounding environment could damage or deteriorate the product (see Figure 1).

For example, large temperature variations between the inside and outside of the enclosure can result in pressure differences that may create a vacuum and draw water through the fittings or component and gasket seals. Or when moist air reaches its dew point, it can no longer hold its form and forms moisture droplets being formed on any available surfaces. This is called condensation. When temperatures are below freezing, it will condense into frost. After time, corrosion occurs and causes electrical resistance, which in turn generates additional heat, product performance problems, rusting, increasing risk of circuit shorting out, and arcing and sparking incidences.

Here are six factors to think about before choosing an enclosure:

  • Environment
  • Application
  • Thermal management requirements
  • Enclosure performance standards
  • Material
  • Size

————————————————————————————————–

SIZE

When specifying, enclosure size needs to be considered. Some questions to think about are:

  • Where will the equipment be mounted?
  • Does your application have specific enclosure location requirements?

It is essential to look at all six determinants – environment, application, thermal management requirements, enclosure performance standards, material, and size – prior to choosing an enclosure. Understanding all six factors will help you make a better choice when it comes to choosing the correct enclosure for the job. In essence, it will promote safety, define minimum levels of product performance, and minimize future maintenance expenses.

Written by: Teresa Kouch, Marketing

Posted in Enclosures, ProductsComments (7)

Six Factors to Consider Prior to Choosing an Electronic Enclosure Pt. 5 of 6


Choosing the right enclosure maybe as important as selecting the right product. An electronic enclosure, also known as housing, helps protect the circuit board allowing it to function properly. Elements (e.g. water, wind, dust, dirt, heat, cold, humidity, and chemicals) in the surrounding environment could damage or deteriorate the product (see Figure 1).

For example, large temperature variations between the inside and outside of the enclosure can result in pressure differences that may create a vacuum and draw water through the fittings or component and gasket seals. Or when moist air reaches its dew point, it can no longer hold its form and forms moisture droplets being formed on any available surfaces. This is called condensation. When temperatures are below freezing, it will condense into frost. After time, corrosion occurs and causes electrical resistance, which in turn generates additional heat, product performance problems, rusting, increasing risk of circuit shorting out, and arcing and sparking incidences.

Here are six factors to think about before choosing an enclosure:

  • Environment
  • Application
  • Thermal management requirements
  • Enclosure performance standards
  • Material
  • Size

————————————————————————————————–

MATERIAL

Deciding on the appropriate material for the enclosure, potential environmental threats and application location should be considered. Enclosures are constructed of metals (eg. aluminum, steel) or non-metallic materials (eg. plastic, fiberglass), depending on application performance requirements as seen in Table 4. Table 5 describes the advantages and disadvantages of each enclosure material.

Table 4: Application Performance & Enclosure Materials

Table 5: Advantages & Disadvantages of Enclosure Materials

Written by: Teresa Kouch, Marketing

Continue to pt. 6 of 6 >>>

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Six Factors to Consider Prior to Choosing an Electronic Enclosure Pt. 4 of 6


Choosing the right enclosure maybe as important as selecting the right product. An electronic enclosure, also known as housing, helps protect the circuit board allowing it to function properly. Elements (e.g. water, wind, dust, dirt, heat, cold, humidity, and chemicals) in the surrounding environment could damage or deteriorate the product (see Figure 1).

For example, large temperature variations between the inside and outside of the enclosure can result in pressure differences that may create a vacuum and draw water through the fittings or component and gasket seals. Or when moist air reaches its dew point, it can no longer hold its form and forms moisture droplets being formed on any available surfaces. This is called condensation. When temperatures are below freezing, it will condense into frost. After time, corrosion occurs and causes electrical resistance, which in turn generates additional heat, product performance problems, rusting, increasing risk of circuit shorting out, and arcing and sparking incidences.

Here are six factors to think about before choosing an enclosure:

  • Environment
  • Application
  • Thermal management requirements
  • Enclosure performance standards
  • Material
  • Size

————————————————————————————————–

ENCLOSURE PERFORMANCE STANDARDS

It is important to understand the enclosure ratings and the level of protection they provide because a single enclosure does not protect against all the elements equally.

To standardize enclosure performance in North America, the National Electrical Manufacturers Association (NEMA), Underwriters Laboratories Inc. (UL), and Canadian Standards Association (CSA) are the commonly recognized standards organization. To standardize enclosure performance internationally, the International Electrotechnical Commission (IEC) prepares and publishes international standards for all electrical, electronic, and related technologies.

Table 1 describes the NEMA, UL, CSA, and IEC enclosure ratings for both non-hazardous and hazardous locations. For hazardous locations in North America, NEMA has categorized it further and separated it by class, division and groups as seen in Table 2. The class defines the general nature of hazardous material in the surrounding atmosphere, the division defines the probability of hazardous material being present in an ignitable concentration in the surrounding atmosphere, and the group defines the hazardous material in the surrounding atmosphere. The difference between NEMA and UL is that NEMA does not require a third party testing and leaves compliance completely up to the manufacturer.

Table 1: Enclosure Ratings for Non-Hazardous & Hazardous AreasTable 1: Enclosure Ratings for Non-Hazardous & Hazardous Areas

Table 2: NEMA Classes, Divisions & Groups for Hazardous AreasTable 2: NEMA Classes, Divisions & Groups for Hazardous Areas

Table 3: IEC Enclosure RatingsTable 3: IEC Enclosure Ratings

Written by: Teresa Kouch, Marketing

Continue to pt. 5 of 6 >>>

Posted in Enclosures, ProductsComments (8)

Six Factors to Consider Prior to Choosing an Electronic Enclosure Pt. 3 of 6


Choosing the right enclosure maybe as important as selecting the right product. An electronic enclosure, also known as housing, helps protect the circuit board allowing it to function properly. Elements (e.g. water, wind, dust, dirt, heat, cold, humidity, and chemicals) in the surrounding environment could damage or deteriorate the product (see Figure 1).

For example, large temperature variations between the inside and outside of the enclosure can result in pressure differences that may create a vacuum and draw water through the fittings or component and gasket seals. Or when moist air reaches its dew point, it can no longer hold its form and forms moisture droplets being formed on any available surfaces. This is called condensation. When temperatures are below freezing, it will condense into frost. After time, corrosion occurs and causes electrical resistance, which in turn generates additional heat, product performance problems, rusting, increasing risk of circuit shorting out, and arcing and sparking incidences.

Here are six factors to think about before choosing an enclosure:

  • Environment
  • Application
  • Thermal management requirements
  • Enclosure performance standards
  • Material
  • Size

THERMAL MANAGEMENT REQUIREMENTS
To maximize the efficiency and lifecycle of products, it is important to be able to manage heat buildup. Whether it’s to dissipate or to add heat, effective thermal management is vital.

Written by: Teresa Kouch, Marketing

Continue to pt. 4 of 6 >>>

Posted in Enclosures, ProductsComments (4)

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Gas Detectors

CETCI gas detectors are used to detect many different gases. Some of the most common are Carbon Monoxide, Carbon Dioxide, Nitrogen Dioxide, Nitric Oxide, Ammonia, Chlorine, Ozone, Combustible Gases like Methane and Propane, Oxygen, Refrigerants and more.

IAQ Monitors

The YES Series of IAQ Monitors are essential for those responsible for conducting Indoor Air Quality (IAQ) Investigations. These instruments are specifically designed to measure and record the quality of indoor air in offices, buildings, homes, schools, parking garages, ice rinks, etc.