JUMO ATHf-SW Operating Instructions Manual page 27

Material of
capillary and
probe
Minimum
bending radius
of capillary
Switching point
accuracy
Mean ambient
temperature
error
End of scale
up to +200°C
up to +350°C
up to +500°C
up to +350°C
5 mm
in % of scale span,
referred to setpoint or limit at T
in % of scale span, referred to limit value.
A deviation of the ambient temperature at the thermostat head and / or the
capillary from the calibration ambient temperature of +22°C produces a shift of
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
0.08
due to capillary, % per °C per meter length
0.047
Surface-mounting thermostats with end of scale
TW
0.14
due to capillary, % per °C per meter length
0.04
6 Instrument description
Capillary
copper, Mat. Ref. 2.0090
1.5 mm dia.
copper, Mat. Ref. 2.0090
1.5 mm dia.
st. steel, Mat. Ref. 1.4571
1.5 mm dia.
at extra cost
st. steel, Mat. Ref. 1.4571
1.5 mm dia.
+22°C
amb
in upper third of scale
at scale start
STB/STW (STB)
due to thermostat head, % per °C
0.17
0.054
> +350°C ≤ +500°C
due to thermostat head, % per °C
Probe
copper, Mat. Ref. 2.0090
brazed
st. steel, Mat. Ref. 1.4571
brazed
st. steel, Mat. Ref. 1.4571
welded
st. steel, Mat. Ref. 1.4571
welded
+0
%
-5
+0
%
-10
≥ +200°C ≤ +350°C
TW STB/STW (STB)
0.06 0.13
0.09 0.11
STB/STW (STB)
0.12
0.03
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