ChannelMag
Section 2 Installation
2.1Media
Considerations
The ChannelMag is suitable for such media as water, raw sewage, slurries, algae laden river water, and similar. The minimum media conductivity is 0.5 microS/cm for operation with pulsed AC transmitters. Most water based media has a conductivity of 200 – 800 microS/cm.
The ChannelMag may be permanently coated with sewage grease, algae, calcium carbonate, iron oxides or similar, without affecting accuracy. No cleaning is necessary. If there is non fluidic sediment on the bed of the channel, then the ChannelMag should sit on the channel bed with its
Check the compatibility of the media with the wetted parts before installing. With some media its consistency and operational temperature range can affect this compatibility.
Make sure the pressure of the media acting on the sensor(s) and the operational temperature does not exceed that specified.
2.1Location and Mounting
For lifting the ChannelMag sensor, use the lifting brackets fixed to the sensor, as shown on the drawing in Section 2.4. Use a min. diameter 1/8” (3mm) steel rope looped through the bracket holes for installing the ChannelMag sensors(s). Use the holes in the magnetic enhancement plates ONLY for convenience of removing the sensors from flowing media, since in so doing the enhancement plates may be damaged.
The ChannelMag is highly insensitive to environmental electrical noise, including interference from radio and variable frequency drives. However, it is good practice to locate the ChannelMag and ancillary equipment away from the immediate area of such noisy environments. The ancillary electronics must be located remotely from the ChannelMag sensors. They must not be mounted under direct sunlight, or where they are subject to driving rain, where they cannot be reasonably read or serviced. For such environments they must be protected by a suitable canopy or protective housing. Avoid environments where moisture can accumulate in the electronics. A heated enclosure may be necessary to achieve this.
The ChannelMag sensors are indefinitely submersible to 30 feet (10m)/ 15 psig/1 bar g. They are normally supplied with conduited cables and junction box (see data sheet in this instruction manual for details of lengths). Should the cables be extended then each cable may be spliced, soldered and all cable joint surrounded with shrink sleeves. Shielding must be extended to the same length as all other cable cores. Should a junction box be used to extend cables, it must be absolutely dry, then fi lled with potting compound. We recommend 3M “High Gel” type 4442 two part,
. The typical drying time is 2 – 3 hours, but it never solidifies hard. A metal shield 1/16”
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