240 Series DIN Panel Meters An extensive range of 48, 72, 96 and 144mm DIN style panel meters offering measurement of all electrical and electronic parameters. Meters are shock resistant and vibration proof and supplied with terminal covers. A selection of slide in dials and customised options are available. Movements In Crompton Instruments world-patented Hi-Q taut band suspension, all the delicate parts of the traditional instruments are eliminated. There are no pivots, no jewel bearings, no hair-springs and no air damping vane. Instead, a tough platinum ribbon suspends the moving element between front and rear tension springs. Specially contoured pads are fitted to the ends of the spindle, and the working gap at each end is filled with a high quality silicon fluid. The pads, together with the fluid reservoir, form a system which acts as a resilient built-in shock absorber. This provides both rotational and longitudinal damping as the moving element floats on oil with no bearing friction and is effectively cushioned against shock and vibration. 360 Synchroscopes and power factor meters have robust pivot and jewel bearings Features with oil damping. An extensive range of specialist Dials, Scales and Pointers measuring meters in 4 case sizes Standard dials are matt white with black printed scales and bar knife-edge pointers. Shock resistant taut band suspension Black dials with white or yellow scales and pointers are also available. Vibration-proof Hi-Q damping Interchangeable slide in dials are used on models 242, 243 and 244 90 moving iron, moving coil and frequency meters. Slide in dials for 90current, voltage and General options include red supplementary pointers, red indexes (quadrant scales), frequency on models 242, 243 and 244 red, green or blue lines, bands or segments, finely spaced divisions, multi-scales, Terminal covers supplied as standard special scales and captions to customer requirements. Benefits Illumination Low cost Internal illumination is available in the following models: 244 and 246 shortscale moving coil and moving iron vane. Local indication 243, 244 and 246 longscale moving coil and moving iron vane. Ease of installation Through dial (Translucent) illumination on 244 and 246 models. Minimal training Edge illumination on 243, 244 and 246 models. Low maintenance Replaceable 6, 12 or 24V lamps are used on all models except 243 longscale meters, where the lamps are internal. Customised options and features Specification Applications Performance BSEN60051 Switchgear Measuring Ranges DIN 43701 Distribution systems Accuracy Overload BSEN60051 Dimensions DIN 43700 Generator sets Scale Marking Generally DIN43802 Control panels Magnetic Influence BSEN60051 Energy management Safety IEC414 Terminals Clamp strap M4 up to 25A. Clamp strap M8 over 25A Building management Humidity Range Up to 95% RH (non condensing) Utility power monitoring Test Voltage 50Hz 2kV RMS for 1 minute Process control Overload AC Current x 1.2 continuous x 10 for 5 seconds Overload AC Voltage x 1.2 continuous x 2 for 5 seconds Motor control Frequency See main pages for other instruments Damping Time Less than 3 seconds is standard. More heavily damped Approvals movements are available on request. LRS and BV Approvals. Standard Calibration 23C Operating Temperature -20C to +60C Enclosure Code IP54 as standard (to BSEN60529). IP55 consult factory Terminals IP20B with terminal cover or terminal boots fitted Case Grade UL94V0 Base Grade UL94V1 8240 Series DIN Panel Meters DIN 16257 symbol meaning for Specification Continued calibration position Case Dimensions and panel cutout conform to IEC473, DIN 43700. Models 242, 243 and 244 have cases and bezels injection moulded in flame retardant engineering Vertical thermoplastic, recognised by Underwriters Laboratory materials specification. All 246 models have pressed steel cases. Bezel Slim-line DIN43802 black as standard Horizontal Bezel Window Standard sheet glass, with zero adjusters where appropriate. Non reflecting glass or polycarbonate shatterproof windows are available. Installation Installations in switchboard panel or mosaic Inclined 60 arrangement on equipment or machine with a panel thickness of up to 40mm in a horizontal or vertical plane. Installation Category III Inclination of dial surface to the Fixing on Panel Models 242, 243 and 244 2 corner fixing clamps and horizontal e.g 60. tensioning thumb screws Model 242 available with a one piece push on clamp. Required orientation must always be stated when ordering if other than Model 246 - 2 side fixing spring clips vertical mounting is required. Mounting Position Normal vertical mounting or as indicated on the scale in accordance with DIN 16257. A deviation of 15 is permissible Approvals Lloyds Shipping (LRS), Bureau Veritas (BV), EMC and LVD Dimensions Model 242 243 244 246 Bezel A 48 x 48 72 x 72 96 x 96 144 x 144 Panel cut-out B 45 x 45 68 x 68 92 x 92 138 x 138 Scale Length: 90 42 65 94 145 Scale Length: 240 72 112 150 230 Maximum overall depth C: Ammeters and Voltmeters A.C. & D.C.* 64 64 64 60 Ammeters and Voltmeters with switch* 64 Dual Meters* 64 C Elapsed Time Meter/Hours Run* 64 64 64 Maximum Demand Indicator* 64 64 60 Combined MDI & MI Indicator* 64 60 Maximum Demand Indicator with relay* 90 Frequency Meter 90* 64 64 64 60 Frequency Meter 240* 120 125 A Phase Angle, Power Factor Meter 90* 107 240* 107 M.C. Indicator with separate transducer* 64 64 64 60 Dynamometer 360 Synchroscope* 120 125 Dynamometer 360 Power Factor Meter* 120 A Phase Sequence Indicator* 64 64 Position Indicator* 120 125 Speed Indicator* 64 64 64 60 Temperature Indicators* 120 125 Quadra Meters* 64 Panel cut-out Impulse Counters* 64 64 64 Wattmeter, Varmeter 90 107 125 B Maximum Panel Wattmeter, Varmeter 240 107 125 Model 244-21Y & 244-21Z 142 thickness 10mm LED Synchroscope & Synchro Check Relay 80 LED 360 Synchroscope 80 Indicator Only * If separate terminal cover is used add 20 mm to dimension C B Not available 9