TESTO 400 - Questions and Support

15 Questions and answers
135
Integrated sensors (at 22 °C, ±1 digit)
Characteristics Measuring range Accuracy Resolutio
n
Temperature
(TC type K)
1
-200 to +1370 °C
± (0.3 °C + 0.1% of m.v.)
Internal cold junction
measurement:
±0.5°C
0.1 °C
Temperature
(NTC)
-40 to +150 °C
±0.2 °C (-25.0 to
+74.9 °C)
±0.4 °C (-40.0 to -25.1 °C)
±0.4 °C (+75.0 to +99.9
°C)
±0.5% of m.v. (rest)
0.1 °C
15 Questions and answers
Error
Description
WLAN connection – error
message.
If the WLAN reception is not sufficient, the error
message Network disabled appears. Connect
the testo 400 to a better WLAN network.
When updating, make sure that there is a stable
WLAN connection so that the update process
does not abort.
Export option cannot be
selected.
If always is selected for the data export, the
settings can be undone via the icon (see
Section 10.4.5). This means that both export
options will be available again in the future.
1
The accuracy information is valid in adjusted, stable temperature conditions. Plugging in the mains
unit, charging the battery or adding digital probes can distort this temporarily, and additional errors may
occur.