Fluke ScopeMeter 190 Series III Portable Oscilloscope (2 or 4 isolated channels)

Portable ScopeMeter oscilloscope for measurements in power and control circuits, featuring an integrated multimeter in two-channel versions and a trend recorder for measurements over several days. Each input is isolated from the other channels and ground, allowing connections to points at different potentials without the risk of short-circuiting through a reference lead.

Unlike bench oscilloscopes, it features a high measurement safety category and a dust-resistant, splash-resistant and shock-resistant housing. Connect-and-View triggering automatically adjusts the time base and trigger level; ScopeRecord captures slow waveforms, while TrendPlot provides electronic data logging.

In rolling stock and substations, the oscilloscope supports converter diagnostics: inverter output waveforms, transistor control signals, battery charger waveforms and interference on control buses. Model selection depends on bandwidth and channel count; three-phase measurements require a four-channel version.

Specifications (from the 190 Series III datasheet):

• Models - 190-062 (60 MHz, 2 channels), 190-102 (100 MHz, 2 channels), 190-202 (200 MHz, 2 channels), 190-502 (500 MHz, 2 channels), 190-104 (100 MHz, 4 channels), 190-204 (200 MHz, 4 channels), 190-504 (500 MHz, 4 channels)
• Measurement category (CAT) - CAT III 1000 V / CAT IV 600 V, inputs isolated up to 1000 V
• Real-time sampling - up to 5 GS/s (depending on the model and number of channels in use)
• Waveform memory - 10,000 samples per channel; ScopeRecord mode 30,000 points per channel
• Multimeter - 5,000 counts (two-channel models)
• TrendPlot recorder - up to 11 days of recording
• Battery operation - up to 7 h with the BP291 battery
• Operating temperature (on battery power) - 0 °C to +40 °C; IP51 rating
• Shock and vibration - 30 g, 3 g sinusoidal (MIL-PRF-28800F Class 2)
• Weight with battery - 2.1 kg (2 channels), 2.2 kg (4 channels)