Det-Tronics U9500 Infiniti Gas Transmitter - Manual (Page 3)

APPLICATION
The Infiniti ® Gas Transmitter Model U9500 is designed
for use with Detector Electronics Corporation’s (Det-
Tronics ® ) gas sensors for detection of hazardous gases.
Gas concentrations are displayed on an alphanumeric
display in %LFL or ppm, depending on the type of
gas being detected. 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 transmitter is contained in an
explosion-proof housing. The transmitter is used with
a single sensor, which may be either coupled directly
with the U9500 housing, or remotely located using a
sensor termination box. 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 to explosive or toxic levels or where
oxygen levels need to be monitored (enclosed
processing areas).
– Known high risk leak locations (points within
processing areas, compressor buildings).
– General open area coverage (storage areas).
FEATURES
– Non-intrusive calibration using the internal magnetic
reed switch, or an externally located pushbutton (not
included).
– Automatic fault diagnostics and graphic message
annunciation.
– Optional relay package provides three alarm relays
(high, low, and auxiliary) and one fault relay.
– Models available for use with catalytic combustible
sensor, point infrared combustible, electrochemical
(EC) H
2
S, and CO, CL
2
, SO
2
, and O
2
electrochemical
sensors.
– Variety of multi-port enclosures available.
SPECIFICATIONS
INPUT VOLTAGE—
24 Vdc. Operating range is 18 to 32 Vdc including ripple.
POWER CONSUMPTION WITH SENSOR —
See Table 1.
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, calibration
gas concentration, full scale measurement range and
gas type to be detected.
10.1 © Detector Electronics Corporation 2012 Rev: 4/12 95-8444
INSTRUCTIONS
Infiniti ® Gas Transmitter
Model U9500