JUMO ATH-EXx Operating Instructions Manual page 23

Switching point
accuracy
Mean ambient
temperature
effect
in % of scale span, referred to the limit value at T
in upper third of scale
TW, TB
at start of scale
in upper third of scale
STW, STB
at start of scale
in % of scale span, referred to the limit value.
A deviation of the ambient temperature at the thermostat head and/or the cap-
illary from the +22°C calibration ambient temperature produces a shift in the
switching point:
higher ambient temperature = lower switching point
lower ambient temperature = higher switching point
Surface-mounting thermostats with end of scale
< +200°C
TW STW
TB STB
effect due to the thermostat head, % per °C
0.08%/K 0.17%/K
effect due to capillary, % per °C per meter
0.047%/K 0.054%/K
6 Instrument description
+0
%
-4
+0
%
-6
+0
%
-5
+0
%
-7
 +200°C  +350°C
TW STW
TB STB
0.06%/K 0.13%/K
0.09%/K 0.11%/K
+22°C.
a
> 350°C
TW
TB
0.14%/K 0.12%/K
0.04%/K 0.03%/K
STW
STB
23