TESTO 480 - Carrying out a Firmware Update

7 Maintaining the product
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The Testo adjustment set provides a reference value to calculate
the offset for a humidity adjustment.
Humidity adjustment is possible with the following probes:
• Humidity probe
• IAQ probe
• Thermal air flow measuring head and humidity probe
When a thermal air flow measuring head and humidity
probe is used, the probe must be deactivated before the
adjustment ([ ] → Switch off flow probe). The probe
can only then be exposed to the reference conditions.
✓ Instrument is switched on and probe is connected.
✓ Probe is already exposed to reference conditions (e.g. salt pot)
for an adequate adjustment time.
• Adjustment time for humidity probe at least 30 min
• Adjustment time for IAQ probe at least 1 h
• Adjustment time for thermal air flow measuring head and
humidity probe at least 3 h
✓ Tab for the relevant probe is activated.
1. [ ] → Probe menu → Humidity adjustment.
2. Select reference value used (11.3%RH/75.3%RH).
3. [ ] → Adjustment.
- A pop-up window with the remaining adjustment time is
displayed.
4. [ ] → End.
- Adjustment menu is closed.
5. Carry out adjustment for the second adjustment point.
7.1.3. Carrying out a firmware update
Updated firmware can be installed on the instrument.
A firmware update can also be carried out with testo
EasyClimate.
✓ Instrument is switched on.
1. Download the current firmware file from
www.testo.com/download-center (registration required).
2. Unzip downloaded zip file.
3. Connect the instrument to the PC with a mini USB cable.
- Instrument is identified by the PC as a USB mass storage
device. The operating system automatically assigns the