21
6 Instrument description
Switching point
accuracy
(in % of scale span;
referred to setpoint / limit value at T
amb
+22°C)
STB, STW (STB)
in upper third of scale
at start of scale
Mean
ambient
temperature
error
(in % of scale span) referred to the limit value.
A deviation from the ambient temperature at the thermostat head and / or
capillary from the calibration ambient tempe22°C produces a shift of
the switching point.
higher ambient temperature = lower switching point
lower ambient temperature = higher switching point
+0
-5
%
+0
-10
%
For temperatures with end of scale
< +200°C
≥
+200°C
≤
+350°C
on thermostat head, % per °C
0.17
0.13
on capillary, per °C per m length
0.054
0.11
