Net Measurement - TESTO 400 Instruction Manual

The NET (Normal Effective Temperature) climate index is determined using the 3 function probe in
accordance with DIN 33403. NET is used, for example, in the basic principles of the Professional
Association for High-Temperature Work (G30), to assess the maximum time which can be spent
working in extreme conditions (e.g. steel industry, foundries).
The following ambient variables are included in the calculation:
- Air temperature
- Air moisture
- Air flow
Connect the following to carry out the measurement:
Socket 1: 3 function probe (0635.1540)
Socket 2: Do not connect probe!
Switch on instrument.
Allocate "NET" to one of the function buttons.
Press "NET" to start measurement.
NET is shown in the display:
Location
60.1
%
32.8
38.1
NET
°C
0.2
m/s
NET
Generally, the following data applies to NET measurement:
Ambient temperature:
NET range:
Downloading using testo Comsoft software
Duct assignment is as follows:
Duct: K:1
Unit: %
Assignment:Air
moisture temp.
°C
15-50°C
5-37°C
K:2 K:3 K:4
°C m/s °C
Air Air NET
flow

NET measurement

i
Function buttons
45