Refrigerant - Handling Safety

This is from liquid refrigerant coming into contact with the skin. This was caused by R22 released onto the fingers when removing the manifold set. This person injured himself and then took over 48 hours to let anyone know. Only then did he seek/receive medical attention. And then a day later we have this! (See picture below)

He had received training on refrigerant safety but ignored the advice.

This is a good opportunity to revisit refrigerant safety and the need for personnel to be aware of the dangers. The South African Refrigeration and Air Conditioning Contractors’ Association (SARACCA)/South African South Qualification and Certification Committee (SAQCC) Gas safe handling training and registration was put in place to address this and many other issues. I will go over the basics with you.

Refrigerant

Refrigerant Definition

Definition: A refrigerant is a compound that can readily absorb heat at one temperature, then compressed by a heat pump to a higher temperature and pressure where it changes phase and discharges the absorbed heat.

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Refrigerant Property Summery

Insulation Testing ~ DhilReefer: Comprehensive Theory And Practical Marine Refrigerated Container Study (Reefer Module)

The Complete Guide to Electrical Insulation Testing

WHAT IS “Good” insulation?

Every electric wire in your plant – whether it’s in a motor, generator, cable, switch, transformer, etc. – is carefully covered with some form of electrical insulation. The wire itself is usually copper or aluminum, which is known to be a good conductor of the electric current that powers your equipment. The insulation must be just the opposite from a conductor: it should resist current and keep the current in its path along the conductor.

To understand insulation testing you really don’t need to go into the mathematics of electricity, but one simple equation – Ohm’s law – can be very helpful in appreciating many aspects. Even if you’ve been exposed to this law before, it may be a good idea to review it in the light of insulation testing.

How to Use a Multimeter ~ Comprehensive Theory And Practical Marine Refrigerated Container Study (Reefer Module)

How to Use a Multimeter

Introduction

So... how do I use a multimeter? This tutorial will show you how to use a digital multimeter (DMM), an indispensable tool that you can use to diagnose circuits, learn about other people's electronic designs, and even test a battery. Hence the 'multi'-'meter' (multiple measurement) name. The most basic things we measure are voltage and current. A multimeter is also great for some basic sanity checks and troubleshooting. Is your circuit not working? Does the switch work? Put a meter on it! The multimeter is your first defense when troubleshooting a system. In this tutorial we will cover measuring voltage, current, resistance and continuity.

Alternating Current (AC) vs. Direct Current (DC) ~ DhilReefer: Comprehensive Theory And Practical Marine Refrigerated Container Study (Reefer Module)

Thunderstruck!

Where did the Australian rock band AC/DC get their name from? Why, Alternating Current and Direct Current, of course! Both AC and DC describe types of current flow in a circuit. In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current (AC), on the other hand, changes direction periodically. The voltage in AC circuits also periodically reverses because the current changes direction.

Most of the digital electronics that you build will use DC. However, it is important to understand some AC concepts. Most homes are wired for AC, so if you plan to connect your Tardis music box project to an outlet, you will need to convert AC to DC. AC also has some useful properties, such as being able to convert voltage levels with a single component (a transformer), which is why AC was chosen as the primary means to transmit electricity over long distances.

What You Will Learn

• The history behind AC and DC
• Different ways to generate AC and DC
• Some examples of AC and DC applications

Electricity Basics ~ Comprehensive Theory And Practical Marine Refrigerated Container Study (Reefer Module)

Electricity Basics

When beginning to explore the world of electricity and electronics, it is vital to start by understanding the basics of voltage, current, and resistance. These are the three basic building blocks required to manipulate and utilize electricity. At first, these concepts can be difficult to understand because we cannot “see” them. One cannot see with the naked eye the energy flowing through a wire or the voltage of a battery sitting on a table. Even the lightning in the sky, while visible, is not truly the energy exchange happening from the clouds to the earth, but a reaction in the air to the energy passing through it. In order to detect this energy transfer, we must use measurement tools such as multimeters, spectrum analyzers, and oscilloscopes to visualize what is happening with the charge in a system. Fear not, however, this tutorial will give you the basic understanding of voltage, current, and resistance and how the three relate to each other.

Georg Ohm

Container Inspections 'GP

Basic Reefer Container Machinery Cycling

Click on image to enlarge

Cool

Credit to www.refrigerationbasics.com/

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