TESTO 400 - Switching the IAQ Data Logger on and off; IAQ Data Loggers - General Information

14 IAQ data logger
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14.4 Switching the IAQ data logger on and
off
As soon as the IAQ data logger is supplied with power, it can be used. Separate
activation is not necessary. To ensure reliable instrument detection on the testo
400, first connect the IAQ data logger to the power via the USB port and then
connect it to the testo 400 using the cable attached to the rear.
It will automatically check whether a firmware update is available and if so, this
will be installed straight away.
If the power supply is interrupted while a measurement is ongoing, there will be
a gap in the measurement data recording process. As soon as the power supply
is restored, the IAQ data logger will continue to record measurement data.
14.5 IAQ data loggers – General information
Depending on the measurement period, specific measuring cycles
are feasible:
Duration
Minimum measuring cycle
1 min to 15 min
1 sec
16 min to 2 hours
10 sec
> 2 hours to 1 day
60 sec
> 1 day to 21 days
5 min
With the testo 400 (and the IAQ data logger), a maximum 1 million
readings (with a maximum of 18 channels) can be recorded with one
measurement.
Example 1 (timed measurement):
Result: 9,216 readings
Duration: 8 days
Measuring cycle: 5 minutes
Measurement channels: Temperature, humidity, CO2, flow (4
channels)
Example 2 (manually launched measurement):
Result: 17,700 readings
Duration: 59 minutes
Measuring cycle: 1 second
Measurement channels: Temperature, humidity, CO2, flow, pressure
(5 channels)