6
3 Technical data
3
Technical data
Temperature range
902428/30, 902428/40
0 to 180 °C
902438/30, 902438/32
0 to 180 °C
The maximum operating temperature of the immersion sleeves must be ob-
served.
Protection type
IP65 (as delivered condition)
In heat applications, it must be ensured that the dew point
is not reached or undershot.
Temperature difference
Minimum
3 K
Maximum
180 K
Maximum pressure
902428/30, 902428/40
PS25 for a water flow velocity of 2 m/s
902438/30, 902438/32
PS25 for a water flow velocity of 2 m/s
Electrical connection
Two-wire, four-wire
Maximum measuring current
The maximum measuring current is calculated using the maximum admissible
power loss of 5 mW.
Depending on the nominal values, this results in the following effective current
values:
Pt100: 1783 µA
Pt500: 797 µA
Pt1000: 564 µA
Response times
Temperature probe, direct mea-
surement
902428/30, 902428/40
t
0.5
≤ 6.0 s
Temperature probe, in immersion
sleeve
902438/30, 902438/32
t
0.5
≤ 12.0 s
Measurement stability
10 years (see also maintenance)
Minimum immersion depth
30 mm
Nominal value
Pt100, Pt500, Pt1000 (see identification marking for temperature probes)
Tolerance
Class B according to DIN EN 60751; restricted tolerances optional
When using two-wire technology, the display will be systematically higher due
to the line resistance (see maximum connection length according to
DIN EN 1434).
