Dover OPW SiteSentinel Integra 100, Руководство по установке, Страница: 62 / 101

Doc. # : M1800, Rev. 06
Page 62 of 101
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Hydrocarbon Vapor Sensor
OPW P/N: 30-0235-V
Hydrocarbon Vapor Sensor
The Hydrocarbon Vapor Sensor detects hydrocarbon vapors in dry
monitoring wells. The presence of these vapors could indicate a
potentially dangerous leak that could lead to safety and
environmental problems. The sensor is made from a long-life resistive
element that increases dramatically in resistance in the presence of
hydrocarbon vapors. Detection of vapors will result in an alarm
condition, as will a break in the cable or sensor malfunction.
Hydrocarbon Vapor Sensor Installation
1. Check Dry Monitoring Wells for vapors before installing.
2. Mount Sensor close to the top above the water level, if
applicable.
3. If sensor is submerged in water it will not function.
NOTE : Depending on saturation factor, the sensor may require
up to 30 minutes to return to normal after vapors have
dissipated.
Hydrocarbon Vapor Sensor Specifications
Detects: Hydrocarbon Vapors
Operating Temperature: -40°F to 158°F (-40°C to +70°C)
Dimensions:
Length: 3.5” (8.9 cm), Diameter: 0.9”
(2.3 cm)
Nominal Resistance:
Uncontaminated: 3,000
– 5,000 ohms
Contaminated: 10,000
– 200,000 ohms
Cable Requirements: Belden #88760 or Alpha #55371
Maximum Wiring Length*:
1,000’ (305 m) of field wiring
Multi-Drop Restriction:
16 per I.S. barrier channel (64 per
barrier)
Connections:
Red = Power, Black = Signal, Shield =
Ground
*NOTE : Maximum Wiring Length is the maximum length of cable to
be used to connect all sensors on an individual channel. This length
includes run of cable from I.S. Barrier to each sensor board in the
string.