Model S4000T
Quick Start Guide
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Sensors used in these areas usually require more frequent calibration checks than
normal, and typically have a shorter life. In many such applications the standard two
year warranty would not apply.
IMPORTANT: Each H
2
S Sensor is shipped with a red plastic cap fitted over the
sensor head. Inside the cap is a dessicant. DO NOT remove this cap until you
have applied power to the sensors. SAVE the cap and RE-CAP the sensor
anytime the system power is off for more than one hour.
WARNING -
General Monitors discourages the painting of sensor assemblies. If the
sensor head is painted over, the gas will not be able to diffuse into the sensor. If the
assembly cover is painted over, the digital display cannot be read.
1.1.2 Remote mounting of the Sensor from the Electronics
If it is necessary to remotely mount the sensor from the electronics and the housing,
the maximum distance can be no greater than 3375 feet (1029) meters, using 14
AWG wire. Sensors that are remotely mounted, must be placed in an explosion-proof
rated sensor housing (GM P/N 10252), and the cable run must be contained in
conduit running from the sensor housing to the electronics. See Section 9.5, for
FMRC approval requirements.
1.2 Mounting and Wiring
1.2.1 Tools Required
1. “5mm” Allen head wrench to remove enclosure lid (included with gas detector).
2. Flat-head screwdriver maximum 3/16” (5 mm) width for terminal block connections
(included with gas detector).
3. Adjustable wrench for conduit or cable gland connections (not included).
WARNING -
The conduit entries should be sealed per the NEC 500-3d, or Canadian
Electrical Code Handbook (Part 1, Section 18-154). Additional benefit of conduit
seals is the prevention of water entering the housing through the conduit entry.
WARNING -
Unused cable entry holes must be sealed with an approved explosion-
proof plug. Red caps supplied by GM are for dust protection only and must not be
left on the unit when installed.
The overall and mounting dimensions for the Model S4000T (Figure 1) should be
used when making installation determinations. A complete list of the mechanical
specifications can be found in Section 9.2.2.
To prevent possible corrosion due to moisture or condensation, it is recommended
that the conduit connected to the Model S4000T housing be sealed or contain a drain
loop.
Each conduit run from a hazardous location to a non-hazardous location should be
sealed so that gases, vapors, and/or flames cannot pass beyond the seal. The
purpose of seals in a Class I hazardous location is to prevent the passage of gases,