OPERATION GUIDE

Preface Product guarantee This instrument has a guarantee against defects in materials and workmanship for a period of three years from the date of shipment. During this period LTH will, at its own discretion, either repair or replace products that prove to be defective. Limitation of guarantee The foregoing guarantee does not cover damage caused by accidental misuse, abuse, neglect, misapplication or modification. No guarantee of fitness for a particular purpose is offered. The user assumes the entire risk of using the product. Any liability of LTH is limited exclusively to the replacement of...

Manufacturing Standards Electromagnetic compatibility This instrument has been designed to comply with the standards and regulations called up by the European EMC Directives. Safety This instrument has been designed to comply with the standards and regulations called up by the European Low Voltage Directive using BS EN 61010-1 : 1993 Quality This instrument has been manufactured under the following quality standard: ISO 9001:2000. Certificate No: FM 13843 Note: The standards referred to in the design and construction of LTH products are those prevailing at the time of product launch. As the standards...

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1 Introduction The CDM9 can be used with a wide range of LTH conventional conductivity cells to measure and control a broad spectrum of solution conductivity. Two versions of the basic CDM9 are available. The Wall-mount version, and the Panel-mount version. Three measurement ranges can be selected using a combination of switch settings and cell constants (1.0 and 0.1). The ranges are: -♦ 0 - 19.99 pS/cm The CDM9 has an onboard volt-free changeover relay with an adjustable setpoint. It can be set to activate if the conductivity is above or below the setpoint. Therefore, the CDM9 can be used...

Cell types which can be used with the CDM9 Cable length Operating frequency_ Ranges of measurement Conductivity accuracy Linearity Repeatability Ambient temperature Temperature variation Temp. compensation slope Temp. compensation point Temp. compensation base Display Control relay EMC : Immunity EMC :Emissions LVD : Safety standard Power supply Panel-mount housing Panel-mount weight Panel-mount environmental Panel-mount dimensions Wall-mount housing Wall-mount weight Wall-mount environmental Wall-mount dimensions Up to 25 metres. Cell : approx 190Hz, sinusoidal_ -20°C to +50°C for full specification....

2 Installation This chapter describes how to install the wall-mount, rail-mount, pipe-mount and panelmount versions, and how to connect the unit to auxiliary equipment and a power source. Wall-mount version The wall-mount version is designed for fixing to a wall or other flat surface using the brackets provided. Mounting brackets and dimensions The brackets should be attached, either horizontally or vertically, to the back of the CDM9 using the four M4 pan head screws provided.

Rail-mount and pipe-mount versions The rail- & pipe-mount brackets are designed for fixing the wall-mount version to a vertical or horizontal handrail or pipe, of 25 mm min. to 60 mm maximum outside diameter. The rail-mounting kit comprises two channels, two clamps and appropriate studs, nuts and washers, as shown in the exploded view below. To mount the rail-mount version proceed as follows: ♦ ♦ ♦ Attach the four studs to the channels using four pairs of nuts and washers as shown in the following diagram. The studding must not protrude beyond the nut on the flat side of each channel Attach the...

Rail-mount and pipe-mount versions (…continued) Exploded view of the rail and pipe fixing clamp assembly. Note: the brackets can be fitted vertically or horizontally

Panel-mount version The panel-mount version is designed to be flush mounted and sealed in a square cut-out in a panel, and is held in place with the two screw clamps provided. Dimensions of panel-mount unit ♦ The panel cut-out for the unit should be 92 mm x 92 mm (+1.0 – 0.0). ♦ A sealing gasket is supplied: fit it around the edge of the cut-out. ♦ Two screw clamps are supplied and are fitted from the back of the instrument. ♦ Ensure the gasket is correctly positioned before tightening the clamps. ♦ A badly fitted gasket will not give a good seal to the specified IP ra

Special installation instructions Part of the method of EMC compliance is a strict limitation on the way in which all signal, supply and control cables are terminated at both the instrument and source or destination. It is essential that the types of cables which have been recommended (or direct replacements) are used. With the wrong cable fitted, incorrect readings will result. If these installation instructions are followed carefully and precisely, the instrument will achieve and maintain the levels of EMC protection stated in the specification. The equipment to which it is connected must also...

54D CABLE USED ON... CMC1/01 CMC1/10 CMC32/10 CMC34/01 CMC34/10 & CABLE EXTENSIONS

Connections and Controls (Wall-mount version) DISCONNECT the mains power to the instrument and the control relays before making changes to connections under the mains terminal safety cover. CDM9 Wall-mount control and connection details (PCB view)

Wall-mount version connections (general) This applies to all cables and cable glands for all installations. After each cable has been connected up, pull most of the cable slack back through the cable gland to prevent any unwanted RF energy being radiated inside the housing. Make sure you do not tension the cable within the instrument. Tighten the cable gland onto the cable so that it grips sufficiently to seal and to prevent the cable from being pulled back through the gland. Any unused cable glands should be sealed with a blanking plug to maintain the IP rating. Wall-mount version cell input...

Wall-mount version relay connections Remove the plastic mains cover (unless already removed above) as follows. Squeeze the top of the mounting post with fine pliers or similar and then lift the mains cover away from the terminals. The relay contacts are connected to the I/O terminals only and are not powered from the instrument itself. They must be connected in series with a supply, a load and a 5 Amp fuse. An arc suppressor may be required to prevent excessive electrical noise, depending upon the load. To switch more than 5 Amps will require a slave relay . Feed the relay cable through the inner...