Fluke 1910A Digital Multi-Counter 5Hz-125MHz Frequency Period Counter Benchtop

Fluke 1910A Digital Multi-Counter 5Hz-125MHz Frequency Period Counter Benchtop

The Fluke 1910A is a benchtop digital multi-counter capable of frequency measurement from 5Hz to 125MHz, period measurement from 5Hz to 2MHz, and totalizing. It features a single-channel BNC input with selectable attenuation and a front-panel trigger level/preset control, along with a multi-function LED display showing overflow, MHz, kHz, and µs indicators. This unit powers on and the display illuminates, but the left side of the LED display flickers and does not function correctly. It is being sold AS-IS for parts or repair only.

Specifications & What's Included

• Manufacturer: John Fluke Mfg. Co., Inc. — Made in USA
• Model: 1910A Digital Multi-Counter
• Frequency measurement range: 5Hz – 125MHz
• Period measurement range: 5Hz – 2MHz
• Totalizing range: 5Hz – 125MHz
• Channel A input sensitivity: 15mV (5Hz–100MHz); 25mV (100MHz–125MHz)
• Attenuator: 10:1
• Input impedance: 1MΩ, 25pF typical
• Max input: 250V rms to 1kHz, decreasing to 10V rms at 10kHz
• Display: Multi-digit LED (7-segment); left side flickers — see photos
• Front panel: Trigger Level/Preset knob, ATTEN button, FREQ/PER/TOT/CHK function buttons, RESOLUTION (AUTO, 100Hz, 10Hz, 1Hz) buttons, PER AVCO buttons, RESET, POWER ON/OFF
• Rear panel: IEC AC power inlet, BNC external clock input, INT/ADJ clock toggle switch, fuse block
• Fuse ratings: 100V–1/4A; 115V–1/8A; 230V–1/6A; SB 250V
• Power: 100V / 115V / 230V AC, 48–440Hz, 8W max
• Form factor: Benchtop with integrated carrying handle
• Includes: Unit with carrying handle only — no power cord, cables, or manual

Applications

The Fluke 1910A is a general-purpose frequency/period counter from the 1970s–1980s era of Fluke's bench test instrument line, designed for laboratory, service bench, and production testing environments where frequency, period, and totalizing measurements are needed up to 125MHz. Counters of this type are used to measure the frequency of oscillators, signal generators, clock circuits, and RF sources, and to verify period and pulse-count in electronic design and repair. The 1910A shares its specification platform with the 1911A (which adds a second channel for higher-frequency inputs to 250MHz). Units like this remain useful as repair candidates or parts donors for other 1910A/1911A instruments, and can be attractive to technicians comfortable with display or driver board repair.