Det-Tronics MOS H2S Gas Sensor - Manual (Page 6)

95-8532 1.4 4
Two additional options are available for resetting the
transmitter. A user supplied switch can be wired to the
transmitter terminal block and used to reset the device
from a remote location. In addition, Detector Electronics
offers a special optional enclosure with a pushbutton
pre-installed within a multi-port electrical enclosure for
customers who do not prefer magnetic switches.
The U9500B utilizes a serial EEPROM for storing
configuration data, setpoints, and calibration data.
MODES Of OpERaTION
The U9500B has three main operating modes:
- Normal
- Calibrate
- Setup (also called Configuration).
Normal mode is the default mode (no buttons pushed).
Three minor modes also exist:
- Setpoint display
- Reset
- Power up.
INSTALLATION
WIRING REQUIREMENTS
• Install per local installation practices and in
accordance with local authority having jurisdiction.
• See Figure 2 for wiring size and maximum distance
from the power supply to the transmitter.
IMPORTANT
Proper installation practices must be followed
to ensure that condensation does not enter the
junction box and interfere with the electronic
circuitry. Refer to local installation codes.
WIRING pROCEDURE
The following procedure should be used for installing
and wiring the Infiniti Transmitter.
NOTE
The U9500B with MOS sensor does not support
sensor separation i.e. the sensor must be attached
directly to the sensor housing.
Install the unit in a location that is best suited to cover 1.
the area to be protected. Whenever practical, the
Infiniti should be placed where it is easily accessible
for calibration. For proper operation, sensors
should be pointing down. See Figure 1 for mounting
dimensions.
Remove the transmitter from its packing material and
2.
note the location of the field wiring terminals.
Remove the cover from the enclosure. One conduit
3.
entry is used for mounting the sensor and the other
is for field wiring. The transmitter module slides into
the mounting bracket within the enclosure and all
field and sensor wiring connects to this module. The
sensor connects to a small plug on one side of the
transmitter and all field wiring connects to terminals
on the other side.
The transmitter can be oriented either way within
the bracket (180° difference) and the bracket can
be rotated 90° to achieve the necessary orientation.
See Figure 3 for left and right field wiring entry and
corresponding bracket orientation. Make sure that
the display is oriented correctly, then proceed with
transmitter wiring.
Mount the transmitter enclosure and connect the field 4.
wiring conduit. The enclosure should be electrically
connected to earth ground.
0
DISTANCE (FEET)
2000 4000 6000 8000 10000
12 AWG 14 AWG 16 AWG 18 AWG
POWER SUPPLY VOLTAGE
32
30
28
26
24
22
20
18
16
14
A1672
Figure 2—Wiring Requirements for Transmitters with Relays