The easy to use testo 480 is a high precision digital temperature and humidity meter which allows you to measure, analyze, and log all relevant ventilation and air conditioning parameters with only one device.

This high precision digital temperature and humidity meter provides independent experts, consultants, technical service providers, and service technicians in the field of ventilation and AC with an efficient means of carrying out all their measurements - i.e. norm-compliant setting and adjustment of air conditioning and ventilation systems in offices, residential and industrial buildings - with only one device.

The intelligent concept behind the testo 480 digital temperature and humidity meter

The testo 480 has a built-in high precision pressure difference sensor for pitot static tube measurements and filter / clean room monitoring. There is also a wide range of high quality optional sensors for carrying out the following measurements:

• Air flow and volume flow (also fume cupboard measurements)
• Temperature
• Humidity
• Pressure (difference and absolute pressure)
• CO2
• Illumination intensity
• PMV / PPD
• Heat radiation
• Degree of turbulence
• WBGT Index

The testo 480 has a wide range of optional sensors and accessories (i.e. wireless testo turbo printer for print outs on site) which allow you to customize your meter to suit your budget and needs.

State of the art technology for HVAC technicians and experts

The testo 480 was designed to make your work more efficient, and your life easier. This high quality, easy to use digital temperature and humidity meter can be used to measure all relevant HVAC parameters, and to carry out long term measurements. The mammoth memory can save up to 60 million readings, and a set of integrated programs guide you through the following measurements step by step.

• VAC measurements in compliance with EN 12599
• Degree of turbulence measurements in compliance with EN 12599
• PMV / PPD measurement in compliance with ISO 7730
• WBGT measurement in compliance with ISO 7243

Digital sensors and intelligent calibration concept

The optional testo digital sensors provide you with highly accurate results, as there is no measurement inaccuracy from the meter. In addition, any deviations which are determined during calibration can be saved to the digital sensor. These deviations are compensated automatically, giving you a zero error value. The intelligent sensors alert the user when the next calibration - which can be carried out by hand - is due.

The testo 480 digital temperature and humidity meter has a built-in, high precision pressure difference sensor (measuring range from -1.45 to +1.45 psi) and connection possibilities for three more optional digital and two temperature (type K) sensors.
 

The Testo 480 can be used in a variety of different applications. Please note, probes are sold separately - the examples below show usage with optional items.

 

Measurement of the air and surface temperature For human beings to be comfortable and perform at their best, it is crucial that the rooms they occupy are correctly air conditioned. As well as the structural conditions and personal perception, the following factors also contribute significantly to the existence of a pleasant indoor climate: the indoor air and surface temperature of walls, windows, floors and ceilings. There is a great selection of TE temperature probes available for the testo 480. The surface probe (order no. 0602 0393) and air humidity probe (order no. 0636 9743) can be used to investigate dew point shortfalls and mould.

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Also part of the range: TC temperature probe with T-hinge measuring head and very quick response time for temperature measurements on surfaces (order no. 0614 0195).

Up to two temperature probes specially for measurements on pipes can be connected to the testo 480 to record and show the difference in temperature in a heating system.
 

Volumetric flow measurement at the air outlet Every duct inlet and outlet should only contain the volumetric flow that according to calculations is a basic prerequisite to an efficient functional system. The large vane anemometer with 100 mm diameter is ideal for measuring the volumetric flows at duct outlets (order no. 0635 9343), as it integrates the flow velocity over a larger area thereby determining disturbance from the air grille (loop method).

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To measure the suction or blowing vents of air grilles and plate valves our volumetric flow rate funnel set is ideal (order no. 0563 4170) as is the large 100 mm vane anemometer (order no. 0635 9343) The entire volumetric flow is recorded with the aid of the funnel without the need for conversion on the basis of the flow velocity and area. This method of flow measurement is simple and reliable.

Take reliable measurements at ceiling outlets using the bendable, thermal flow probe (0635 1543).
 

PMV-/PPD value measurement according to ISO 7730 A person's sense of well-being in a room (level of comfort) depends on a series of particular external influencing factors. For example, people are extremely sensitive towards thermal radiation caused by cold walls or windows. We also respond to draughts in a room with thermal discomfort. Thermal comfort is defined by the following main influencing factors: Indoor air temperature and radiation temperature Air velocity Relative humidity of the indoor air

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In turn, the effect of these main influencing factors on a person's sense of comfort depends on his or her (level of) activity and clothing. The international standard ISO 7730 combines all of the parameters in the PMV/PPD measurement (Predicted Mean Vote/Predicted Percentage Dissatisfied). The PMV is an index which predicts the average climate assessment value of a large group of people. The PPD Index provides a quantitative prediction of the number of people that will be dissatisfied with a certain ambient atmosphere.

The measurement program integrated into the testo 480 directly calculates the PMV/PPD value according to ISO 7730 using optional attachment probes. The generated diagram in the measuring instrument helps you to evaluate an indoor climate quickly and objectively. The PMV/PPD measurement protocol records the measurement data for you and your customers.