6 Using the product
45
- Explorer structure is displayed.
2. Select the desired measuring point.
3. [ ] → New WBGT measurement.
- WBGT measurement is opened.
4. Select the serial number (SN) for the individual probe.
- In the case of digital probes, the probe name appears. As long as
the probe has not been renamed, it is always identified by the last
three digits of the serial number.
- When connecting analog thermocouples, Int [TE1] or Int [TE2]
appears as the serial number, depending on which connector was
selected.
5. Select measuring type and measuring rate.
6. Set criteria for start and end of the measurement.
7. [ ] → Save and start measurement
During the measurement, the values are calculated from
the current measuring values.
After the measurement, a calculation is carried out based
on mean values.
8. [ ] → Save and close
- Measurement protocol is saved under the selected measuring
point.
6.6.12. PMV/PPD measurement
Measurement program available as of firmware version
1.05.
The PMV/PPD measurement determines the comfort level (PMV =
Predicted Mean Vote) and the relative discomfort (PPD = Predicted
Percentage Dissatisfied) e.g. at workstations and is described in
the ISO 7730.
The mean radiation temperature required for determining
PMV/PPD is calculated in the testo 480 from the measurement
parameters of globe temperature, ambient temperature and air
speed. The formula is based on forced convection and applies to
standard bulbs with 150 mm diameter.
2
Necessary measuring values
• Mean radiation temperature in °C = t
r
2
Source: DIN EN ISO 7726
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