The volt-ohm-milliammeter (YOM) is also called a multimeter. The multimeter is used for all phases of service work including installation, preventive maintenance, and troubleshooting. The…
Category: Instruments & Devices
The alternating current (AC) clamp-on ammeter is used to measure the total AC current being drawn by a system or by the individual loads in…
Acid/moisture kits are one of the methods used to test refrigeration or air conditioning systems for the presence of moisture and/or corrosive acid. Acid/moisture testing…
The vacuum gauge/indicator is used to measure lower-than atmospheric pressures (vacuums). An accurate vacuum gauge is needed to measure the 500-micron deep vacuum levels that…
Air conditioning and heat pump systems are designed to operate with only refrigerant and oil circulating within them. New field-piped systems and systems that have…
Charging cylinders and scales are used to insure that the correct amount of refrigerant is measured into a system when it is being charged. Charging…
One of the most common problems encountered when servicing air conditioning or heat pump equipment is refrigerant loss due to leaks. Leaks usually result from…
Use of recovery/recycle units (Figures 1-8 and l -9) is required by U.S. Environmental Protection Agency (EPA) regulations. Technicians who service and dispose of air…
Psychrometers contain two identical thermometers, one to measure the dry bulb temperature and one to measure the wet bulb temperature. The sensing bulb of the…
Thermometers are used to measure temperatures for a variety of HVAC service tasks. The thermometer is frequently used to determine the suction line or liquid…