Det-Tronics TXL Series Gas Transmitter - Manual (Page 9)

MODEL TXL-O2
MEASUREMENT RANGE—
0-40% by volume standard (other ranges are field selec-
table).
ACCURACY—
0.5% by volume.
LINEARITY—
±0.5% O
2
.
REPEATABILITY—
±0.5% O
2
.
RESPONSE TIME—
T90 < 20 seconds.
SENSOR CROSS SENSITIVITY—
See Table 10.
TEMPERATURE RANGE—
–15°C to +40°C (+5°F to +104°F).
HUMIDITY RANGE—
15 to 90% (non-condensing).
WARRANTY—
2 years.
IMPORTANT SAFETY AND WIRING NOTES
WARNING
Be sure to read and understand the entire instruc-
tion manual before installing or operating the gas
detection system. Only qualified personnel should
install, maintain or operate the system.
WARNING
The wiring procedures in this manual are intended
to ensure proper functioning of the device under
normal conditions. However, because of the many
variations in wiring codes and regulations, total
compliance with these ordinances cannot be guar-
anteed. Be certain that all wiring complies with the
NEC as well as all local ordinances. If in doubt,
consult the authority having jurisdiction before
wiring the system.
WARNING
Power must be switched off at the source during
all wiring operations. Each TXL detector must be
installed with an approved, power-limiting zener
diode barrier installed in a non-hazardous area.
Only the TXL gas detector may be located within
the hazardous area.
WARNING
To maintain the intrinsically safe approval rating,
the TXL detector wiring must be routed through a
zener diode barrier, which meets the entity para-
meters as described in the Specifications section
of this manual. The selected barrier shall be
approved with intrinsically safe circuits for the haz-
ardous location class and group as appropriate for
the application. The cable capacitance plus the
transmitter capacitance (Ci) must be less than or
equal to the Ca on the barrier. The cable induc-
tance plus the transmitter inductance (Li) must be
less than or equal to the La on the barrier. The
barrier must be located in a non-hazardous area.
WARNING
All intrinsically safe wiring must be kept separate
from non-intrinsically safe wiring. Terminate barri-
er earth ground to the ground bus of the power dis-
tribution panel. Resistance to ground must not be
greater than 1.0 ohm.
WARNING
Electrical apparatus connected to an intrinsically
safe system must not generate more than 250
Vrms with respect to earth ground.
WARNING
Installation must be in accordance with the barrier
manufacturer ’s instructions and with article
504/505 of the National Electrical Code (NEC),
and ANSI/NFPA 70.
WARNING
Barrier enclosure must meet the requirements of
ANSI/ISA S82 for use in non-hazardous or Class 1,
Division 2, Groups A, B, C, D hazardous locations.
Always use a UL listed or NRTL approved dust-
tight enclosure and conduit fitting appropriate for
the environmental protection required in Class II,
Division 2, Groups E, F, G and Class III hazardous
areas.
WARNING
The detector wiring must be in conduit or armored
cable. For Class II, Division 1 and Division 2
installations, use only dust-tight rated conduit fit-
tings or cable glands approved for the application
safety requirements.
7 95-8541 1.1
Gas Level Reading
Carbon Dioxide 5% <0.5% O
2
Reading
Hydrogen 2% <0.1% O
2
Reading
Table 10—Cross Sensitivity of O
2
Sensor