Det-Tronics MOS H2S Gas Sensor - Manual (Page 3)

APPLICATION
The model U9500B Infiniti® Transmitter is designed for
use with Det-Tronics Metal Oxide Semiconductor (MOS)
sensors for detection of hydrogen sulfide gases and
vapors.
Gas concentrations are displayed in ppm on an
alphanumeric display. The transmitter provides a user
selectable isolated/non-isolated 4 to 20 milliampere
output signal that corresponds to the detected gas
concentration. An optional relay package is available to
provide contact outputs for alarm and fault conditions.
The electronics of the Infiniti transmitter is contained in an
explosion-proof housing. The sensor is coupled directly
to the Infiniti housing. The Infiniti offers non-intrusive
calibration by actuating a magnetic reed switch with a
hand-held magnet. It is not necessary to remove the
housing cover to actuate the magnetic reed switch.
Typical Infiniti applications include:
Confined spaces where gas/vapor leaks can –
concentrate.
Known high risk leak locations. –
General open area coverage. –
FEATURES
User-friendly setup. –
Non-intrusive calibration using the internal magnetic –
reed switch, or an externally located pushbutton (not
included).
Automatic fault diagnostics and graphic message –
annunciation.
Sensor sensitivity and end of sensor life indication. –
Optional relay package provides three alarm relays –
(high, low, and auxiliary) and one fault relay.
Variety of multi-port enclosure configurations –
available.
SPECIFICATIONS
Transmitter
INPUT VOLTAGE—
24 vdc. Operating range is 16 to 32 vdc including
ripple.
POWER CONSUMPTION WITH SENSOR—
Infiniti with alarm relays and sensor connected, with 24
Vdc input voltage:
3 watts nominal, 5 watts maximum.
CURRENT OUTPUT—
Linear 4 to 20 ma output.
Maximum loop resistance is 600 ohms at 20 to 32 vdc.
Selectable isolated or non-isolated operation.
Factory set 2.0 ma output indicates unit is in Calibration
mode (field adjustable).
Less than 1.0 ma output indicates fault condition.
DISPLAY—
Eight character alphanumeric display indicates power
on, gas concentration, alarm and fault conditions. It also
enables field adjustment of alarm setpoints.
1.4
©
Detector Electronics Corporation 2007 8/07 95-8532
INSTRUCTIONS
U9500B210X Infiniti® Transmitter and
Metal Oxide Semiconductor (MOS)
H
2
S Gas Sensor