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15.2 Analog Inputs
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Measurement ranges 1, 2, 5, 10, 20, 50, 100, 200, 500 mV, 1, 2, 5 V/DIV
DC amplitude accuracy ±0.4% f.s.
Zero position accuracy ±0.15% f.s.
Temperature characteristic Gain: ±0.02%f.s./℃
Zero position: ±0.03%f.s./℃ (after zero adjustment)
Frequency characteristic DC to 400 kHz (+1/-3 dB) (DC coupling)
1 to 400 kHz (+1/-3 dB) (AC coupling, low cut-off frequency: 1 Hz±50%)
(in 1 to 5 mV/DIV range)
Noise 75 μVp-p typical, 120 μVp-p max. (in 1 mV/DIV range)
Low-pass filter 5, 500, 5 k, 100 k ±50% (Hz) (-3 dB)
Input resistance 1MΩ±1%
Input capacitance 200 pF max. (at 100 kHz)
Input coupling DC, GND, AC
Maximum input voltage 30 V rms or 60 V DC
Maximum rated voltage to
earth
30 V rms or 60 V DC
Input terminal BNC terminal
Number of input channels 2 (switching mode: select from electrical charge input, preamplifier input
voltage input or by channel.)
Input type Unbalanced (input interval floating, floating between input and main
unit GND, common input between voltage input GND and charge input
GND)
Zero position setting range -50 to 150% f.s. (in full-size representation of the vertical axis)
Common mode rejection ratio 80 dB minimum (at 50/60 Hz and with signal source resistance
100 Ω maximum)
Anti-aliasing filter Cutoff frequency (fc) of 20, 40, 80, 200, 400, 800, 2 k, 4 k, 8 k, 20 k,
40 kHz (ON/OFF possible, automatic setting synchronized with time axis
and frequency axis range)
Attenuation is -66 dB min. at 1.5 fc.
Maximum sampling speed 1 MS/s
A/D resolution 12 bits
Operating place Same as the MEMORY HiCORDER in which the 8947 is installed
Operational ranges for
temperature and humidity
(Same as the MEMORY HiCORDER in which the 8947 is installed)
Temperature and humidity
ranges for storage
Temperature: -10℃ to 50℃ (14
F to 122
F)
Relative humidity: 80%RH maximum (with no condensation)
Dielectric strength One minute at 400 VAC between the 8947 and the main unit, and
between the 8947 and the input unit
Dimensions Approx. 170W×20H×148.5D mm (6.69"W×0.79"H×5.85"D) (excluding
projections)
Mass Approx. 310 g (10.9 oz.)
Effect of radiated radio-
frequency electromagnetic
field
±10% f.s. at 3V/m (in the 10 mV/DIV range)
Standards applying EMC EN61326 ClassA
Safety EN61010
Pollution Degree 2, Measurement Category
(anticipated transient overvoltage: 330 V)
Voltage input
Common specifications
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