MEGGITT CITEC POTENTIOMETERS INDUCTORS, SURFACE MOUNT DEVICES SWITCHES, NETWORKS ENCODERS, SENSORS Spindle Operated Potentiometers TYPE M SERIES This is one of Meggitt Citec s most popular ranges and is available with cermet or co-moulded carbon resistance elements. This choice means that components offer excellent electrical and thermal stability, reliability, low noise and long life which makes them most suitable for the majority of professional applications. The MC Series is used in the Tornado Project and is the standard single turn general purpose panel control used for most military applications in the UK and in Europe. MEGGITT CITEC KEY FEATURES CERMET OR CO-MOULDED ELEMENT PROVEN RELIABILITY BS AND CECC APPROVED 2W RATING AT 70C IN CERMET STRONG CONSTRUCTION SEALED TO MILITARY STANDARD PANEL AND CONTAINER SEALED (MC1, MH1) RUGGED TERMINATIONS SALES ACTION DESK MEGGITT ELECTRONIC TEL: (01793 611666) FAX: (01793 511513) COMPONENTS LOG No MO109 ISSUE 4 04-98SPECIFICATION MH1 MC1 MCU ELECTRICAL Element Technology: Co moulded Carbon Cermet Cermet Std. Resistance 100 Ohms to 2M2 100 Ohms to 2M2 10 Ohms to 1M Ohm Range & Laws: Linear Linear Linear 1 K. Ohm to 2M2 Log Approved Resistance 1 K. Ohm to 2M2 100 Ohms to 1 M Ohm Range & Laws: Linear Linear Resistance Values: 1,2,2 and 4.7 in each decade 1,2,2 and 4.7 in each decade 1,2,2 and 4.7 in each decade Selection Tolerance: 20% 10% 10% Rated Dissipation at 70C: 0.25W Linear 2W 2W 0.125W Non Linear Limiting Element Voltage: 250 Vdc 315 Vdc 315 Vdc Isolation Voltage: 355 Vdc 450 Vdc 450 Vdc Electrical Rotation: 260 210 210 Terminal Resiastance: < 50 Ohms for values < 3 Ohm < 3 Ohms over 1 Kohm < 25 Ohms for values below 1 K Ohm Noise (E.N.R.): 2% of resistance 3% Max. 3 Ohms or 3% Insulation Resistance: > 5 G Ohms > 5 G Ohms > 1 G Ohms Terminal Resistance: 500 V ac peak 630 V ac peak 630 V ac peak MECHANICAL Starting Torque: < 85 mNm < 85 mNm < 40 mNm Mechanical Rotation: 300 270 270 End Stop Torque: 800 mNm 800 mNm 800 mNm ENVIRONMENTAL Limits of Resistance Change: 15% (after 1000 hrs) 15% (after 1000 hrs) 15% (after 1000 hrs) Temperature Coefficient: 5% 5% 5% Bump Severity: 390 m/s, 4000 bumps 390 m/s, 4000 bumps 390 m/s, 4000 bumps Vibration Severity: 10-500 Hz 98 m/s 10-500 Hz 98 m/s 10-500 Hz 98 m/s Climatic Category: 40/070/56 40/070/56 40/070/56 Mechanical Endurance: 25000 operations Min. 25000 operations Min. 25000 operations Min. Sealing: Panel/Container sealed Panel/Container sealed DIMENSIONS See Below 21.0 Dia M F MH1 1.59 Dia MH1 2.50 Faston 5.56 P.C.R. 2.38 60 0.375 Dia. 0.80 10 x 32 T.P.I. Whit. Form R.H. 28.0 MC1/MCU 8.45 MC1/MCU 8.38 Wire Terminations 4.00 Standard Spindles Spindle Details 3.80 CRS. Type Plain Slotted Drilled Slotted Drilled 0.85 Hole 3.18 0.80 Dia. Pins MH1 25.4,38.1,50.8 15.9,19.05,25.4 25.4 1.53 Deep Dia. 5.08 x 1.53 Wide 25 16, 20, 25 25 MC1 From End MCU 25 16, 20, 25 25 of Spindle HOW TO ORDER Please specify type, resistance value, tolerance, law and spindle details. Add inspection requirement where appropriate. e.g. MH1 10K 10% LINEAR, PLAIN 25.4mm We will advise an MEC Citec part number against this description Meggitt Electronic Components Ltd. Ohmic House, Westmead Industrial Estate, Swindon, Wilts. SN5 7US Telephone: (01793)487301 (Admin.) (01793) 611666 (Sales) Telex:449112 Citec G Fax:(01793) 610217 or 511513 This publication is issued to provide outline information only and (unless specifically agreed to the contrary by the Company in writing) is not to form part of any order or be regarded as a representation relating to the products or service concerned. We reserve the right to alter without notice the specification, design, price or conditions of supply of any product or service. Whilst Meggitt Electronic Components products are of the very highest quality and reliability, all electronic components can occasionally be subject to failure. Where failure of a Meggitt Electronic Components product could result in life threatening consequences, then the circuit and application must be discussed with the Company. Such areas might include ECG, respiratory. and other medical and nuclear applications and any non fail safe applications circuit. 5.10 CRS 4.90 6.34 6.31