User's Manual

WEMS Installer’s Guide 8

WEMS Software

Figure 3. Typical Label Found on all Luna

Monitoring Radio-linked Devices.

Guidelines Concerning Solar Panels

All of Luna iMonitoring’s sensor modules and iCCUs employ a single, solar-

assisted battery for power. Properly orienting the solar panels on the WEMS

component achieves a maximum battery life of more than two years. Place the

component in a non-shaded area with the solar panels facing toward the sun.

Also, ensure that the site chosen will not become shaded due to tree growth or

installation of other structures.

Guidelines Concerning Hazardous Environments

Luna iMonitoring sensor modules mount directly onto structures such as a tanks,

pipelines, or wellheads located in hazardous areas. These sensor modules

(iEFM, iTLM-1, and iWPM-T) are, by design, intrinsically safe and meet the

standard for UL-913 certification for Class I, Division 1, Groups C and D

hazardous areas. By definition, an intrinsically safe apparatus is one in which all

the circuits are intrinsically safe; and an intrinsically safe circuit is one in which

any spark or thermal effect is incapable of causing ignition of a mixture of

flammable or combustible material in air under prescribed test conditions,

according to the National Electrical Code.

The iCCU mounts onto structures outside the hazardous zones in the oil field; for

example, an area greater than 3 meters from an oil tank.

Guidelines Concerning iTLM-1 Mounting

The iTLM-1 uses Ultrasonic Sensing Technology to provide tank fluid level

measurements. The sensor projects an ultrasonic beam at the surface of the

liquid in a tank. The beam reflects off the liquid’s surface back to the sensor.

The iTLM-1 acquires the raw measurement and then compensates for the effects

of temperature on the raw data. To properly measure the fluid level in the tank,