Questions And Answers - TESTO 400 Instruction Manual

Integrated sensors (at 22 °C, ±1 digit)
Characteristics
Temperature
(TC type K) 1
Temperature
(NTC)

15 Questions and answers

Error
WLAN connection – error
message.
Export option cannot be
selected.
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.
Measuring range
-200 to +1370 °C
-40 to +150 °C
Description
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.
If always
settings can be undone via the icon
Section 10.4.5). This means that both export
options will be available again in the future.
15 Questions and answers
Accuracy
± (0.3 °C + 0.1% of m.v.)
Internal cold junction
measurement:
±0.5°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)
is selected for the data export, the
Resolutio
n
0.1 °C
0.1 °C
(see
135