Preparing For Measurement; General Measurement Information - TESTO 400 Instruction Manual

9 Operation

Preparing for measurement

9.3

General measurement information

9.3.1
All compatible probes are listed in Section 7.4.
• Depending on the parameter to be measured, certain probes need to be
connected to the instrument (via Bluetooth®, TUC or TC plug).
• Some (thermal) probes require a warming-up phase until they are ready to
measure.
• Before every measurement, wait until the adjustment phase is over. The
adjustment phase ensures that the readings have stabilized.
• For some measurement parameters, additional calculation parameters need
to be set in order to ensure that you get the correct measurement results,
see details in the respective application menus.
To enable reliable data handling, the quantity of measuring values to be
•
saved for each measurement protocol must be restricted to 1 million
individual values.
Depending on the measurement period, specific measuring cycles are
feasible:
Duration:
1 min to 15 min
16 min to 2 hours
> 2 hours to 1 day
> 1 day to 21 days
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: Result: 9,216 readings
Duration: 8 days
Measuring cycle: 5 minutes
Measurement channels: Temperature, humidity, CO2, flow (4 channels)
Example 2: Result: 17,700 readings
Duration: 59 minutes
Measuring cycle: 1 second
Measurement channels: Temperature, humidity, CO2, flow, pressure (5
channels)
Depending on the connected probe, prior to each measurement, individual
parameters for the measurement can be set via the
Point 8), such as the visibility of individual measurement parameters or the units
of the measured values.
26
Minimum measuring cycle:
1 sec
10 sec
60 sec
5 min
icon (see Section 9.1 -