Arkon Channelmag instruction manual ChannelMag Installation

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ChannelMag Section 2 Installation

2.3.Straight Lengths of Channel / Pipe

2.3.1Straight Lengths of Channel (CM2)

2.3.2Straight Lengths of Pipe (PM2)

the electrode cables and the energizer coil cable within the junction box. Do not use silicone rubber (RTV) for potting, since it contains acetic acid which can corrode the junction box terminals.

Make sure the serial number of the ChannelMag sensor(s) shown on the cables agrees with the serial number of the transmitter. This is particularly important when more than one ChannelMag flow system has been supplied. If a sensor and transmitter have been supplied separately, then the transmitter range factor has to be adjusted according to the sensor calibration (see transmitter instructions).

Although the ChannelMag sensor is bi-directional, make sure the ChannelMag is installed in the channel with the flow direction arrow consistent with the actual flow direction of the media. If it is not, then the electrode cable terminals in the remote transmitter may be switched around (see separate transmitter instruction manual). The accuracy and flow calibration factor is identical in both directions.

The CM2 ChannelMag must be installed in a channel with a minimum of 7 straight channel widths upstream and 4 straight channels downstream, as shown in the diagram below. For bi-directional use a minimum of 7 straight channel widths are required upstream and downstream.

The straight lengths are measured from the end of the ramps. When ramps are not supplied (and the ChannelMag CM2 sensor(s) is inserted into a recess in the base of the channel), then the straight lengths are measured from the end of the CM2 sensor.

W = channel width (not necessarily the width of the CM2 sensor)7W = upstream minimum length2W = downstream minimum length (must be 7W for bi-directional fl ow)L = overall length with or without ramps

The ChannelMag and installation conforms to German DIN 19559 and German Waste Water Institute (ATV Arbeitsgruppe 1.2.5) requirements.

The ideal location in the pipe is where there is a maximum straight length. The table below provides recommendations of minimum straight lengths of pipe for various pipe configurations. Shorter lengths or other configurations affect published accuracy, dependant on pipe size and velocity range. Consult ARKON or a qualified representative.

Diametrically opposite sensors are either 1 pair or 2 pair.

When an ultrasonic level transducer is used for partially filled pipe applications it must be located at least 8” (200 mm) before or after the ends of the ramps to avoid drops in level due to sub-critical flows, or rises in level due to super-critical flows. When the hydrostatic level transducer is employed its level sensing position is virtually at the start of the upstream ramp and avoids critical flow rises and falls.

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Contents Channelmag Flowmeters Foreword Important Please Read ChannelMag Recommended Spares Introduction Scope ChannelMag CM2Scope ChannelMag PM2 Safety Media Considerations Location and MountingChannelMag Installation Installation, Dimensions and Approx. Weights 1 CM2 Sensors Important NoteChannelMag Installation Installation of 2 x CM2 ChannelMag Sensors 3 CM2/D Dimensions Approximate Weight4 PM2 Sensors in Full Pipes 5 PM2 Sensors in Non-Full Pipes Installation of PM2 Sensors With Magnetic Enhancement Band ChannelMag PM2 Weights Dimensions Grounding ChannelMag PM2 Enhancement Plate Expander MechanismCable Types ChannelMag Junction Box Wiring Diagram ChannelMag Entela Approval Cable Runs From The Junction Box Calibration and Range Factors Cleaning Zero Span Checking Effect of Moisture IngressionSignal Or Indication Swing Recommended Spares

Channelmag specifications

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