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General| Operating temperature | 0 to +50 °C |
|---|---|
| Storage temperature | -20 to +60 °C |
| Accuracy (temperature) | ±0.5 °C |
| Resolution (velocity) | 0.01 m/s |
| Resolution (temperature) | 0.1 °C |
| Display | LCD |
| Resolution (volume flow) | 1 m3/h |
| Type | Flow hood |
| Measurement range (velocity) | 0.4 to 40 m/s |
| Accuracy (velocity) | ±(0.1 m/s + 5% of mv) |
| Battery type | AA batteries |
| Battery life (alternative) | Approx. 20 hours |
| Operating conditions | 0 to +50 °C |
| Storage conditions | -20 to +60 °C |
| Dimensions (alternative) | 220 x 54 x 42 mm |
| Weight (alternative) | Approx. 500 g |
Explains manual usage, symbols, and key safety warnings for proper operation.
Covers crucial safety measures for instrument operation, maintenance, and responsible environmental disposal.
Details the testo 420's applications, interchangeable flow hoods, and smartphone app integration.
Lists all measurable parameters, their units, operating ranges, and available interfaces.
Provides precise specifications for instrument accuracy and measurement resolution across different parameters.
Details instrument response times, operating and storage conditions, and physical dimensions.
Introduces the complete measurement setup, including the instrument, hood, and accessories.
Guides users through inserting batteries and performing initial device configuration.
Step-by-step instructions for pairing the testo 420 with a mobile device via Bluetooth.
Details how to adjust damping, hood calibration, and automatic zeroing intervals for optimal measurements.
Instructions for correctly attaching and setting up the volume flow hood for accurate readings.
Procedures for conducting volume flow, Pitot tube, and differential pressure measurements.
Guides for saving measurement data, managing folders, and transferring files to a PC.
Provides essential guidelines for safely cleaning the testo 420 instrument.
Addresses frequently asked questions and offers solutions for instrument problems.
Lists compatible accessories and spare parts with their corresponding article numbers for purchase.
Presents country-specific product authorizations, certifications, and essential warnings.
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