Variable-Speed Viscometer Model 286 Part No. 28600
The Variable-Speed Electronic Viscometer is a precision rotational viscometer built for conveniently field testing the rheological properties of drilling fluids.
Speeds can be selected in one of two modes. The variable mode allows continuous speeds from 3 to 600 rpm, while the second mode offers settings at conventionally used speeds of 100, 200, 300, 600 rpm and gel strength (3 rpm). Closed loop speed control allows accurate testing of shear thinning fluids because the speed remains locked at the desired speed throughout testing. The rpm readout resolution is 1 rpm on a digital display. The indicator dial is read through a cover-mounted magnifier and uses a conventional torsion spring.
A 12-volt DC circuit, or 115- or 230-volts AC, 50-60 Hz normal drilling rig voltage, can power the unit and frequency variations do not affect the rheometer.
A cantilever frame supports this instrument and allows tilting for sample cup cleaning and changes. The plastic viscosity and yield point of the fluid being tested can be obtained by plotting a graph.
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