Cropico CM5-N Datasheet0 pages

CM5-N
5 DECADE CAPACITANCE COMPENSATION BOX TO
COMPLIMENT THE RM6-N
Capacitance Decades
Dimensions
330mm x 240mm x 200mm (W H D) approx
Mass
6.5kg
Resistors
Metal film 0.6 ohm at 70 °C
Temperature coefficient ±100 p.p.m. / °C
Switches
Contact material silver plated brass. Contact resistance = 10 milli ohm
with positive click mechanism. Insulation Resistance = 50,000 Mega ohm
Resistance
Temperature Co-efficient: ±3ppm / +20°C to +85°C ±5ppm max
over –55°C to + 125°C 0.1, 0.01, & 0.001 dials 10ppm/°C
Full Load Stability: ±35ppm/10,000 hours
±50ppm/26,000 hours
No Load Stability: ±25ppm/10,000 hours
±35ppm/26,000 hours
Over full temperature range; -50°C to +125°C
Power Rating: 0.33 watt (+85°C) 0.25 watt (+110°C)
Maximum Continuous Working Voltage:
Up to 250 V dc
Noise: Essentially non-measurable <1.5 mV/°C
Thermal E.M.F.: <0.4mV/°C typical
Encapsulation: Moulded epoxy
Windings: Exclusive 'air cushioned' technique provides virtually
stressless elements for improved performance. Non inductively
wound. Direction of winding reversed at half turns point
A five decade capacitance box to compliment the RM6-N range
of resistance decades. Styled in the same ergonomic desk case,
the CM5-N is a useful addition to any laboratory, as well as for
industrial and educational use. The required capacitance is set by
means of rotary switches with skirted knobs and stators giving a
clear indication of the dial setting. The capacitors are a
combination of polycarbonate and polystyrene, generously rated
minimum 160 Vdc with a good dissipation factor and high
insulation. A useful feature of this unit is the residual capacitance
being compensated for on the 10 x 100pF and
10 x 1nF dials so that the actual value of the dial setting appears
at the terminals.
Decades Accuracy
10 x 100pF
10 x 1nF
10 x 10nF
10 x 100nF
10 x 1mF
± 5%
± 5%
± 5%
± 5%
± 5%
CM5-N SPECIFICATIONS
key feature CM5-N
5 decades n
Range 100 pF to 11.111 uF n
Accuracy 5% n
Residual capacitance 30 pF at zero setting n
Residual capacitance compensation 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.com