16
OLC(T)100
Technical manual
A special holder is available for mounting the detector on the ceiling (see section
on accessories. In the OLCT100 HT version, only the OLC20 HT removable
detector head can be used at temperatures from -20°C to + 200°C.
Only the OLCT100 HT enclosure can be used in ambient temperatures from -
40°C to + 70°C.
The high temperature cable between the OLCT100 HT enclosure and the OLC20
HT head is integral with the instrument and is not user-replaceable.
The cable should be protected mechanically
Connector cable
The detector shall be connected to the central unit (measurement and automation
unit) by a shielded instrumentation cable, armored if necessary. The choice of
cable will be dictated by the particular
requirements of the installation, distance,
and type of detector (see table below).
018
Figure 8: the cable connecting the detector to the central unit should be chosen
with care.
018
Type of detector
Type of sensor
Maximum length (km) for
cable of cross-section as
indicated
Maximum
load
resistance for
4-20 Ma
0,5 mm²
0,9 mm²
1,5 mm²
Upstream line voltage
(Vcc)
24
24
24
OLCT100 XP
Catalytic or
semiconductor
0,8
1,4
2,4
250
OLCT100 XP (1)
Electrochemical
<4
<4
<4
OLCT100 XP-IR
Infra-red
1,4
2,6
4,4
250
OLCT100 IS (2)
Electrochemical
1,8
3,3
<4
OLCT100 HT
Catalytic, high
temperature
0,8
1,4
2,4
250
(1) for resistance calculations, the assumed load is 120
Ω
for 4-20 Ma.
Central unit
Detector
Connector
cable
