Home Products F/V UNIT 8940

F/V UNIT 8940

Frequency, Rotation, Pulse, and Current waveforms measurement

Discontinued

Key Features

  • Frequency, Integration, Pulse duty ratio, Voltage, and Current measurement (using with optional current sensor)
  • 12-bit A/D resolution measurement
  • Pulse counting for the encoder
  • For the motor rotation, pules integration, duty ratio, and pulse width measurement

Model No. (Order Code)

8940 For the 8860-50, 8861-50, and similar products
Note: This module must be used with the Memory HiCorder. Input cords and current sensors are not supplied. Please purchase the appropriate sensors for the intended application.

Basic specifications

Accuracy guaranteed: 1 year
Measurement functions Number of channels: 2, for voltage input based frequency measurement, integration, pulse duty ratio, current (with optional clamp-on sensor), and voltage measurement
Input connectors Metallic BNC connector (input impedance 1MΩ, input capacitance 60pF), sensor connector (dedicated connector for clamp-on sensor via conversion cable, common ground with recorder), Max. rated voltage to earth: 30Vrms or 60V DC (with input isolated from the unit, the maximum voltage that can be applied between input channel and chassis and between input channels without damage)
Compatible current sensors 9270, 9271, 9272, 9277, 9278, 9279, 3273, 3273-50
Measurement range Frequency: DC to 100kHz, with 0.05Hz to 5kHz/DIV, 11 ranges, 5 (r/min) to 500 (r/min)/DIV, 5ranges, P50Hz (40 to 60Hz), P60Hz (50 to 70Hz) * Power line frequency measurement requires the DIFFERENTIAL PROBE 9322 or PT 9303, Accuracy: ±0.2% of full scale (except 5kHz/DIV range), ±0.7% of full scale (5kHz/DIV range), ±0.032Hz (P50Hz, P60Hz range)
Integration: DC to 90kHz, with 5counts to 500kcounts/DIV, 11 ranges
Pulse duty ratio: 10Hz to 100kHz, with 100% of full scale, 1 range, Accuracy: ±1% of full scale (10Hz to 10kHz)
Threshold: -10 to +10V (settable in 0.2V steps)
Full scale: 20DIV, Max. allowable input: 30Vrms or 60V DC (the maximum voltage that can be applied across input pins without damage)
Measurement range Voltage: 0.5mV to 2V/DIV, 12 ranges
Current: 5mA to 100A/DIV, 10 ranges, using current sensor (powered from the 8940, max. 4 sensors total)
DC amplitude accuracy: ±0.4% of full scale, zero position ±0.15% of full scale (current measurement accuracy dependent on sensor accuracy/characteristics)
Frequency characteristics: DC to 400kHz ±3dB
Full scale: 20DIV, Max. allowable input: 30Vrms or 60V DC (the maximum voltage that can be applied across input pins without damage)
Measurement resolution 1/80 of measurement range (installed in 8860 series, excluding current range when using 9279)
Highest sampling rate 1MS/s (2-channel simultaneous sampling), (frequency/duty ratio measurement: 1.125μs cycle)
Other functions Voltage input pull-up: ON (10kΩ)/OFF, input coupling: DC, GND, AC (voltage/current), DC (others), low-pass filter: 5Hz/500Hz/5kHz/100kHz
Dimensions and mass 170 mm (6.69 in)W × 20 mm (0.79 in)H × 148.5 mm (5.85 in)D, 300 g (10.6 oz)
Included accessories None
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