Static-Voltmeter
Static-Voltmeter R-4021
Electronic instrument with a choice of electrodes for measuring the electrostatic charges of synthetic fibers, yarns, foils and sheets. Measurements of body loads.
- Measuring range 1-50'00 Volt, -input resistance 10x10 (17) Ohm
- Special electrodes for resistance measurements of yarns, flocky material, ribbons and sheets
- Display of positive and negative values
- Measurements of specific resistance charges
- Measurements of body loads
- Efficiency tests of antistatic preparations, can be combined with measurements of the F-Meter
- Processing of statistic data, graph displays and evaluation on the PC
Electrostatic charges on synthetic materials often cause great difficulties to producers, processors and users ( public and industrial ) . The materials charged electro statically are difficult to process and handle, contaminate quicker and can even cause explosions by sparks ( ammunition and firework plants ) The ROTHSCHILD STATIC-VOLTMETER has been designed to offset these drawbacks and help to overcome all electrostatically related problems.
With the ROTHSCHILD STATIC-VOLTMETER exact and and efficient checking of electrostatic charges are possible during and after production and processing of à synthetic fibres à plastics à foils and sheets à granulates With the INTERFACE /SOFTWARE 4021A/d all measured data are statistically processed and evaluated and graphically presented on the PC ( WINDOWS 2000 up / EXCEL ) .
The ROTHSCHILD STATIC-VOLTMETER has the following
- measurements 1 – 50 000 volts static à automatic measuring range switch
- 9 measuring ranges à measuring of static fields from 1 v/cm up
- surface tension measurements à built in overload protection
- measurement of specific static loads à body load measurements
- polarity reading à electrodes for all applications (yarn, staple fibre,carpets etc.)
- resistance, conductivity measurements à checking of antistatic finishes
- for R+D and quality control à international standards ( US – norm )
Measuring Principle
Unlike other instruments known to date the ROTHSCHILD STATIC-VOLTMETER uses a vibrating reed condenser. This condenser, whose dialectic is air and which is placed at the highly insulated measuring input , changes its capacity at a specific frequency. The amplitude of the generated alternating voltage is changed by charge variations at the measuring input. After amplification a proportional voltage can be read on the galvanometer and be evaluated in a data processor.
This measuring system has a very high input resistance of 10 x 16 ohms which allows the measurement of all kinds of electrostatic loads.