Data Sheet

Omeg Limited
RH19 1RJ
Registration No. 600441
http://www.omeg.co.uk
[e-mail]
Tel: [phone]
This information is supplied in good faith but the customer is politely reminded that it is their responsibility to check the suitability of
our products for their particular application, production techniques and processes. Please note that all dimensions are for reference
purposes only and, as it is the Company's policy to continuously improve our products, we reserve the right to incorporate changes
without notice. Please read our terms and conditions before purchasing our products. Published 01-04- 2018
Linearity
As a basis of assessing Linearity Tolerance the independent method is the most practical,
permitting as it does, the reference curve to be aligned as near as possible to the actual output
curve. This avoids the use of the theoretical starting and finishing points, it is normal for the
customer to realign the achieved curve with series trimmers at each end of the device if
required.
Linearity Tolerance is 4% over the Nominal Resistance range of 1K0 to 1M0. The Linearity
Tolerance is measured on at least 70% of the effective rotation range.
Note. In the case of Terminal and Zero-based linearity, both present constraints which increase
the manufacturing difficulty and in consequence have an adverse effect on the product's price
and availability.
Potentiometer linearity
Matching Tolerance (For Tandem Stereo Potentiometers)
Tandem Potentiometers have two identical resistor units with the same variation law. The mismatching
of the two resistor units, expressed in dB, is measured by the difference between the attenuations
introduced by each resistor unit at various points of travel.
• Law A: 4 dB at Attenuation range 0 - 20 dB
• Law B and C: 3 dB at Attenuation range 0 - 20 dB