The document is an instruction manual for testo 945 · testo 946
This manual covers the operation of Testo 945 and 946 temperature measurement instruments, including probe setup, measurement functions, memory management, and technical specifications. It explains how to switch on, configure settings, take measurements, and print data. The device supports thermocouple (Type K, T, S), NTC, and Pt100 probes, with detailed accuracy and operating temperature ranges provided.
The manual also includes safety instructions, such as not measuring on live parts, protecting the instrument from direct sunlight, and proper battery handling. It details how to set location names, date/time, units, and limit values, as well as how to save and print measurements manually or automatically.
| Memory space | Up to 130 measurement logs with one reading or 1 measurement log with 3000 readings |
|---|---|
| Power supply | Battery / rechargeable battery. Alternative: 12 V mains unit |
| Operating temperature | 0 to +50 °C |
| Storage temperature | –20 to +70 °C |
| Weight | Approx. 255 g incl. batteries |
| Accuracy (Type K) | ±0.3 °C or ±0.5 % of reading (the larger value applies) |
| Accuracy (Type T) | ±0.3 °C or ±0.5 % of reading (the larger value applies) |
| Accuracy (NTC) | ±0.2 °C (-25 to +74.9 °C) ±0.4 °C (+75 to +99.9 °C) ±0.5 % of reading (remaining range) |
| Accuracy (Pt100) | ±0.2 °C (-200 to +200 °C) ±0.1 % of reading (remaining range) |
| Resolution | 0.1 °C |
Typical battery life is 40–45 hours with alkaline manganese batteries; reduce by a factor of 5 if using a 9V battery.
The instrument operates between 0 to +50 °C.
Yes, it can print data using a desktop printer connected via RS232, but the distance should not exceed 0.5 m.