Fluke 289 Industrial Logging Multimeter (true RMS, TrendCapture)

Industrial true-RMS multimeter with data logging for diagnostics of automation systems, power distribution and electromechanical equipment. Recorded readings can be displayed as a graph directly on the instrument (TrendCapture), without a computer.

Unlike a basic multimeter, it includes an event logger with change thresholds, a low-pass filter for measurements downstream of a frequency inverter, a low-impedance input to eliminate ghost voltages, and a low-resistance range with milliohm resolution for comparing windings and contacts.

In rolling-stock workshops and substations, the instrument can be left connected to log battery voltage drops, control-signal interruptions and auxiliary-circuit overloads that only occur during operation or under load. Direct current measurement is limited to the ampere range stated in the datasheet.

Specifications (Fluke 289, from the datasheet):

• DC/AC voltage - up to 1000 V; basic accuracy 0.025% (DC), 0.4% (AC true RMS)
• DC/AC current - up to 10 A (20 A for 30 seconds)
• Resistance - up to 500 MΩ; 50 Ω range with 1 mΩ resolution; conductance 50 nS
• Capacitance - up to 100 mF; frequency - up to 999.99 kHz; temperature - –200 °C to +1350 °C (with probe)
• AC bandwidth - 100 kHz; peak capture - 250 µs
• Logging - up to 15,000 events, on-screen review (TrendCapture)
• Maximum voltage between terminal and earth - 1000 V
• Display - 50,000 counts, backlit ¼ VGA dot-matrix
• Operating temperature - –20 °C to +55 °C; vibration MIL-PRF-28800F Class 2; 1 m drop
• Power - 6 AA batteries (100 h, 200 h in logging mode); weight 871 g