12 EasyLine EL3000 Series Data Sheet 10/24-4.10 EN Rev. 9
Thermal conductivity analyzer Caldos27
Measurement principle
Difference in thermal conductivity of various gases
Micromechanical silicon sensor with especially short T
90
time
Sample components and measurement ranges
Sample component
and associated gas
Smallest
Meas. range
Smallest meas. range
with suppr. zero-point
Air in Ar 0–16 vol.-% 94–100 vol.-%
Ar in air 0–16 vol.-% 94–100 vol.-%
Air in CO
2
0–10 vol.-% 90–100 vol.-%
CO
2
in air 0–10 vol.-% 90–100 vol.-%
Air in H
2
0–13 vol.-% –
H
2
in air 0–11 vol.-% –
Air in He 0–13 vol.-% 98–100 vol.-%
He in air 0–12 vol.-% 97–100 vol.-%
Ar in CO
2
– 50–100 vol.-%
CO
2
in Ar 0–50 vol.-% –
Ar in H
2
0–13 vol.-% 99–100 vol.-%
H
2
in Ar 0–11 vol.-% 97–100 vol.-%
Ar in He 0–13 vol.-% 99–100 vol.-%
He in Ar 0–11 vol.-% 97–100 vol.-%
Ar in N
2
0–16 vol.-% 94–100 vol.-%
N
2
in Ar 0–16 vol.-% 94–100 vol.-%
Ar in O
2
0–10 vol.-% 90–100 vol.-%
O
2
in Ar 0–10 vol.-% 90–100 vol.-%
CH
4
in H
2
0–14 vol.-% 99–100 vol.-%
H
2
in CH
4
0–11 vol.-% 96–100 vol.-%
CH
4
in N
2
0–16 vol.-% 94–100 vol.-%
N
2
in CH
4
0–16 vol.-% 94–100 vol.-%
CO in H
2
0–13 vol.-% 99–100 vol.-%
H
2
in CO 0–11 vol.-% 97–100 vol.-%
CO
2
in H
2
0–13 vol.-% 99–100 vol.-%
H
2
in CO
2
0–11 vol.-% 97–100 vol.-%
CO
2
in N
2
0–10 vol.-% 90–100 vol.-%
N
2
in CO
2
0–10 vol.-% 90–100 vol.-%
H
2
in N
2
0–11 vol.-% 97–100 vol.-%
N
2
in H
2
0–13 vol.-% 99–100 vol.-%
H
2
in NH
3
0–10 vol.-% 90–100 vol.-%
NH
3
in H
2
0–10 vol.-% 90–100 vol.-%
He in N
2
0–12 vol.-% 97–100 vol.-%
N
2
in He 0–13 vol.-% 98–100 vol.-%
Measurement ranges for monitoring hydrogen-cooled turbo
generators
Sample component and associated gas Measurement range
CO
2
in air or Ar in air 0–100 vol.-%
H
2
in CO
2
or H
2
in Ar 100–0 vol.-%
H
2
in air 100–80 vol.-%
Other sample components on request.
Measurement range quantity and limits
2 measurement ranges
Measurement ranges are freely adjustable within the limits
shown in the table.
Largest measurement range
0–100 vol.-% or 0 vol.-% to saturation, depending on
measurement task
Measurement ranges should not be set within ignition limits.
Stability
The following data apply only if all influence factors (e.g. flow
rate, temperature, atmospheric pressure) are constant. They
relate to the smallest measurement ranges given in the table.
The deviations may be larger for smaller measurement ranges.
Linearity deviation
≤ 2 % of span
Repeatability
≤ 1 % of span
Zero drift
≤ 2 % of smallest possible measurement range per week
Sensitivity drift
≤ 0.5 % of smallest possible measurement range per week
Output fluctuation (2 σ)
≤ 0.5 % of smallest measurement range span at electronic
T90 time = 0 sec
Detection limit (4 σ)
≤ 1 % of smallest measurement range span at electronic
T90 time = 0 sec
Influence effects
The following data relate to smallest measurement ranges given
in the table. The influence effects will be larger at operating
altitudes > 2000 meters.
Flow effect
≤ 0.5 % of span at a flow change of ±10 l/h. At an identical
flow rate for test and sample gases the flow rate effect is
automatically compensated.
Associated gas effect
The knowledge of the sample gas composition is necessary
for the analyzer configuration. If the sample gas contains
components in addition to the sample component and
associated gas (binary gas mixture), this will result in
erroneous measurements.
Temperature effect
Ambient temperature in the permissible range
at each point in the measurement range: ≤ 1 % of span per
10 °C, based on temperature at the time of calibration
Thermostat temperature = 60 °C
Air pressure effect
≤ 0.25 % of span per 10 hPa for the smallest possible ranges
given; for larger spans the effect is correspondingly lower.
Pressure sensor working range: p
abs
= 600–1250 hPa
Power supply effect
Voltage and frequency in the permissible range: ≤ 0.2 % of
span
Position effect
< 1 % of span up to 30° deviation from horizontal orientation
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