CHANNELMAG FLOWMETERS FOR OPEN CHANNELS AND NON- FULL PIPES Instruction Manual RTM- Expolink s.r.o.
FOREWORD This instruction manual is designed to help you gain a thorough understanding of the operation of the equipment. ARKON recommends that you read this manual completely before placing the equipment in service. Although ARKON designs reliability into all equipment, there is always the possibility of a malfunction occurring. You can use this manual to help in diagnosing and repairing the malfunction, if possible.
IMPORTANT – PLEASE READ DANGER The installation and operation of this product may put you at risk of serious injury or even death. Take whatever precautions are necessary to ensure your safety before making an installation or working on one. Never work alone or unsupervised. Install and operate this product in accordance with all applicable safety and health regulations, as well as any appropriate local ordinances. This product may be installed in confined spaces.
ChannelMag Table of Contents Section 1 Introduction 1.1 Scope: ChannelMag CM2 1.2 Scope: ChannelMag PM2 1.3 Safety 66 77 88 Section 2 Installation 2.1 Media Considerations 2.2 Location and Mounting 2.3 Straight Lengths of Channel / Pipe 2.3.1 Straight Lengths of Channel (CM2) 2.3.2 Straight Lengths of Pipe (PM2) 2.3.3 Important Note 2.4 Installation, Dimensions and Approximate Weights 2.4.1 CM2 Sensors 2.4.2 Installation of 2 x CM2 ChannelMag Sensors 2.4.3 CM2/D Dimensions and Approximate Weights 2.4.
Table of Contents 4.8 Erratic Signal 4.9 Signal or Indication “Swing” 24 24 24 24 Section 5 Recommended Spares 5.
ChannelMag Section 1 Introduction 1.1 Scope: ChannelMag CM2 The ChannelMag CM2 is suitable for open channels having diverse cross sectional shapes from 6” to 200 feet (150 mm to 60 m). They meet or exceed the requirements of ISO 9213 and are calibrated in a long open tank, believed to be the largest NIST traceable facility available. The ChannelMags are calibrated in accordance with ISO* approved methods. Each ChannelMag system is normally supplied with a NIST traceable Calibration Certificate.
Chanel Mag Section I Introduccion 1.2 Scope: ChannelMag PM2 The ChannelMag PM2 Series is suitable for full or partially full pipes from 20” to 120” (500 3000 mm). They meet or exceed the requirements of ISO 9213 and are calibrated in a long open tank, believed to be the largest NIST traceable facility available. ChannelMags are calibrated in accordance with ISO approved methods. Each ChannelMag system is normally supplied with a NIST traceable Calibration Certificate.
ChannelMag Section 1 Introduction 1.3 Safety The following warnings are provided for your safety. You should read the general note regarding danger preceding this introduction, as well as these warnings when working with this equipment: DANGER Crush hazard. The flowmeters may be very heavy (net weights from 45 to 450 lb / 20 to 200 kg each). You could be crushed to death, or very seriously injured, if the flowmeter slips during installation and strikes you or falls on you.
ChannelMag Section 2 Installation 2.1 Media 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.
ChannelMag Section 2 Installation 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.
ChannelMag Section 2 Installation Pipe Confi guration 90° bend upstream and downstream After a tee Upstream partially closed valve Multiple Sensors Number of Single Sensor Number of Straight Pipe Diameters D Upstream Downstream Straight Pipe Diameters D Upstream Downstream 10 D 5D 5D 2D 15 D 5D 8D 2D 25 D 5D 15 D 2D Downstream partially closed valve 8D 5D 2.3.
ChannelMag Section 2 Installation Note The height “E” of the magnetic enhancement plates is custom made and normally extends 2” (50mm) below the top of the channel. The width W is adjustable to fit the channel width. W includes the mounting brackets. 1/4” (6.3mm) thick base plates with countersunk 1/4” screws from the bottom Note: A CM2/8” sensor is always supplied with ramps.
ChannelMag Section 2 Installation 2.4.2 Installation of 2 x CM2 ChannelMag Sensors Adjust width before installation into channel 2.00” 50m Lifting brackets. Do not lift by the Actual CM2 Width enhancement plates. For CM2 sensors installed in a recess in the bed of the channel, the installation configuration remains the same. 1/4” (6.
ChannelMag Section 2 Installation 2.4.3 CM2/D Dimensions and Approximate Weight The CM2/D is normally used with a FMX167 hydrostatic level transducer and installed as shown below. A 2-part re-enterable gel type 4442, manufactured by 3M Company, St. Paul, Minnesota, is normally supplied to retain the CM2/D in the hole made for it. The 2-part gel is mixed together in equal amounts. It makes approximately 1 gallon (4.5 liters) of gel, which should suffice for the installation of CM2/D.
ChannelMag Section 2 Installation step should be cemented with an approach angle of not more than 15 degrees. The recess must extend over the full width of the bed of the channel to accommodate the Magnetic Enhancement Plates. Note Note: CM2/8” ChannelMag sensors are normally supplied with ramps. 2.4.4 PM2 Sensors in Full Pipes ChannelMag PM Series sensors are used for full pipe flow measurement from 20” - 120” (500 - 3000 mm) diameter.
ChannelMag Section 2 Installation 2.4.5 PM2 Sensors in Non-Full Pipes The ChannelMag PM Series sensors are used in partially filled pipes from 20” - 120” (500 - 3000 mm) diameter. For pipes 20” - 36” (500 - 915 mm) a single ChannelMag sensor is installed in a retention band at the bottom of a horizontal pipe. For larger pipes two sensors are used at the bottom of the pipe, with their center lines equally dispersed at 15 degrees from the pipe center.
ChannelMag Section 2 Installation 2.4.
ChannelMag Section 2 Installation 2.4.7 ChannelMag PM2 Enhancement Plate Expander Mechanism The expander mechanism incorporates 2 left- hand and right- hand threaded rods, which when turned with a wrench (spanner), secure the enhancement plates and sensor assembly firmly in pipe. Additional fixtures or holes in the pipe are unnecessary. 2.4.8 ChannelMag PM2 Weights and Dimensions 2.5 Grounding The CM2 ChannelMag is equipped with a grounding plate, normally manufactured from AISI 316 stainless steel.
ChannelMag Section 2 Installation 2.6 Cable Types ChannelMags are connected to a junction box normally using cables in flexible 1” (25mm) conduit. See the ChannelMag Sensor Specification for the standard cable and conduit lengths. The cables and conduit are stowed for packing against the side of the Magnetic Enhancement Plates and are marked “coils,” “electrodes,” and “reference.
ChannelMag Section 2 Installation 2.6.
The cable ends and the junction box supplied for multi-Channel Mag systems are to NEMA 6 and IP68 for permanent submersion to 30 feet (10m) water column. As such, the cable ends are supplied with shrink-fit sleeves. It is important not to cut these sleeves off during storage, as they prevent moisture permeating the cables ends. Moisture in the cables causes signal instability. Cut the sleeves off only prior to wiring into the transmitter.
ChannelMag Section 2 Installation For multiple ChannelMag systems, the electrode and reference cables may all run in the same conduit to their respective transmitters, but separated from the exciter coil cables by a minimum of 2 feet (0.5m). Multi-exciter coil cables may all run together in a single conduit, even with other power cables. Again, the multi-exciter coil cables must be separated from the reference and electrode cables by a minimum of 2 feet (0.5m). 3.
ChannelMag Section 4 Maintenance 4.1 Cleaning Under typical operating conditions the ChannelMag sensor requires no maintenance. Due to the uniquely high signal to media noise ratio, the affects of such coatings as algae, sewage grease, calcium carbonate, iron oxides or similar coatings have no affect on published accuracy. As such cleaning of coatings is normally unnecessary. Should there be silt or similar non-fluidic build up, the upper surface of the ChannelMag sensor must be cleaned.
ChannelMag Section 4 Maintenance 4.6 Transmitter Fault Should the resistances referenced above be correct, but the zero and span cannot be achieved, then the fault lies with the transmitter. 4.7 All Checks Good, But No Signal Check wiring in transmitter terminals in accordance with the transmitter instructions. Make sure there is actually flow through the channel. 4.8 Erratic Signal Check the following: a) Make sure the ChannelMag sensor is fully covered with media. b) Check Paragraphs 4.1.4 to 4.1.
ChannelMag Section 5 Recommended Spares 5.1 Recommended Spares Since the ChannelMag sensor is a solid state sensor, completely encapsulated, there are no recommended spares. Make sure when ordering a new ChannelMag sensor or transmitter that the serial number found on the transmitter label is advised. When a new ChannelMag sensor is provided it has a new Calibration Certificate.
