Resistance Decades & Standards 005/6/8 VERY HIGH ACCURACY DECADE BOXES WITH VERSATILE WIDE OHM RANGE A versatile range of resistance decade boxes available in 5, 6 & 8 key feature 005/6/8 High accuracy 0.01% and high performance n decades. High Accuracy and wide range 0.001 ohm to Suitable for Pt100 and tranducer simulation n 11 Mega ohm are combined in a compact lightweight metal 5, 6 and 8 Decades n case. The switches have gold plated contacts to ensure a low Long term stability 20ppm/year n Low temperature co-efficient 3ppm/C to + 85 C n contact resistance and negligible thermal E.M.F. Some models Gold-plated switch contacts and solid copper n employ the Waidner Wolf technique to eliminate the errors switch input terminals Negligible thermal E.M.F.s n contact resistance and are particularly suited to Pt100 simulation Light weight / small size n with resolution as low as 0.001 ohm ( 0.0025C). With certificate of conformity n In-house test figures optional n Bracken Hill, South West Industrial Estate, Peterlee, County Durham, SR8 2SW United Kingdom Tel: +44 (0) 191 586 3511 Fax: +44 (0) 191 586 0227 Email: sales cropico.com Web: www.cropico.com005/6/8 SPECIFICATIONS 008-C 008-B 008-A 006-C 006-B 006-A 005-B Decade Accuracy Current Max n n 10 x 0.001 2% 1.4A n n n n n 1% 1.4A 10 x 0.01 n n n n n n n 10 x 0.1 0.5% 1.4A n n n n n n n 0.2% 300mA 10 x 1 n n n n n n n 10 x 10 0.01% 100mA n n n n n n n 0.01% 30mA 10 x 100 n n n n n 10 x 1k 0.01% 18mA n n n n 0.01% 5mA 10 x 10k n n 10 x 100k 0.01% 1.8mA n 0.05% 0.3mA 10 x 1M Sutable for Resolution C when Residual Model No. Decades Total Resistance Resolution Pt100 Simulation Simulating Pt100 Resistance 005-B 5 1,112.10 0.01 n 0.025 1 006-A 6 1,112.11 0.001 0.0025 1 n 006-B 6 11,112.10 0.01 0.025 1 n 006-C 6 111,111 0.1 70m 008-A 8 111,112.11 0.001 0.0025 1 n 008-B 8 1,111,112.1 0.01 0.025 1 n 008-C 8 11,111,111 0.1 80m CCaalliibbrraattiioonn Maximum Continuous Working Voltage: Up to 250 V dc Calibration certificates including UKAS traceable are available on request Noise: Essentially non-measurable <1.5 mV/C SSwwiittcchheess Thermal E.M.F: Contact material gold plated brass <0.4mV/C typical Contact resistance = 5 milli ohm Encapsulation: Insulation Resistance (all paths = 10 giga ohm) Moulded epoxy Proof voltage 1kV Windings: Exclusive air cushioned technique provides virtually stressless RReessiissttoorrss elements for improved performance. Non inductively wound. Temperature Co-efficient: Direction of winding reversed at half turns point 3ppm / +20C to + 85C 5ppm maximum over 55C to +125C 0.1, 0.01, & 0.001 dials 10ppm/C WWeeiigghhtt Full Load Stability: 005 - 0.5kg 35ppm/10,000 hours 006 - 0.6kg 50ppm/26,000 hours 008 - 0.8kg No Load Stability: 25ppm/10,000 hours SSiizzee 35ppm/26,000 hours 350mm x 100mm x 80mm (W H D) approx (all models) Over full temperature range: -50C to +125C Power Rating: 0.33 watt (+85C) 0.25 watt (+110C) Seaward test and measurement companies include: SEAWARD CLARE CROPICO RIGEL SEAWARD GROUP INDUSTRIAL SAFETY INSTRUMENTS PRECISION INSTRUMENTS MEDICAL PORTABLE ELECTRICAL SAFETY INSTRUMENTS