RBB decade resistance boxes improve calibration
A
Cropico product story
Edited by the Engineeringtalk editorial team
Jun 3, 2009
Cropico is offering the RBB decade resistance boxes, which improve the calibration of instruments used in the offshore industry.
The RBB series features a re-engineered lightweight case designed for high-impact resistance and protection and offers 0.05 per cent calibration accuracy over a range of 0.001ohm to 11Mohm.
RBB series boxes feature a re-engineered lightweight case designed for impact resistance and protection
Five- and six-decade versions are available; these use Cropico maintenance-free switches with gold-plated contacts to ensure a low contact resistance and negligible thermal EMF.
The boxes give long-term stability of +/-3ppm per year and have a low temperature co-efficient of +/-3ppm/C to 85C.
Units come in models ideal for temperature and insulation-resistance simulation.
Some models employ the Waidner Wolf technique to eliminate switch contact resistance errors.
With resolution as low as 0.0001ohm (0.0025C), these are particularly suited to PT100 simulation.
Another option is in-house test figures.
A range of Cropico precision measurement instrumentation is available from the Seaward Group.
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Contact Cropico
Tel +44 191 587 8748
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Cropico has introduced the digital ohmmeter D07Plus, designed to improve the accuracy to which low resistance can be measured.
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