Data Sheet

AP3203.2
TP3276.2
HP3217.2R
HD32.3
HD40.1
RS232
• Air speed = 0 ÷ 1 m/sec
• Water vapour pressure = 0 ÷ 2,7 kPa
PMV is a particularly suitable index for the evaluation of work places with moderate
microclimate such as houses, schools, offi ces, research laboratories, hospitals, and is
useful to predict the number of people likely to feel uncomfortably warm or cool.
According to ISO 7730 PMV values range between + 0,5 and - 0,5, provides comfort
conditions corresponding to a percentage of dissatisfi ed (PPD) lower than 10%. (see
table below).
Table 1: valuation scale of the thermal environment
PMV PPD % EVALUATION THERMAL ENVIRONMENT
+3 100 Hot
+2 75,7 Warm
+1 26,4 Slightly warm
+0,85 20 Acceptable thermal condition
-0,5 < PMV < +0,5 < 10 Comfortable
-0,85 20 Acceptable thermal condition
-1 26,8 Cool
-2 76,4 Cold
-3 100 Extremely cold
To calculate PMV and PPD indices, it’s necessary to know:
• the working load (energy expenditure);
• the clothing thermal insulation.
Example of immediate data printing of PMV, obtained with HD40.1 printer
NOTES
Reference standard
Instrument model
Version of the instrument fi rmware
Date of the instrument fi rmware
Serial number of the instrument
Identifi cation Code
Description of the probe connected to input 1
Description of the probe connected to input 2
Description of the probe connected to input 3
Date and time
Air speed
Globe thermometer temperature
Dry bulb temperature
Relative humidity
Metabolic expenditure
Resistance of clothing
PMV – Predicted Mean Vote
PPD – Predicted Percentage of Dissatisfi ed
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