Fluke 190 Series II ScopeMeter® Test Tool The first four- and two-channel scopes built for CAT IV industrial environments Extend your arsenal of troubleshooting capabilities by visually inspecting signals amplitude, time, shape and disturbance or distortion characteristics. The Fluke 190 series combines the power of a high performance oscilloscope, multimeter and paperless recorder in an easy to use test tool you will come to rely on in the field.