User Manual

5.2 Analog Input Section
95
5.2.7 Model 8947 Charge Unit
General Specifications
Temperature and humidity
range for guaranteed
accuracy
Period of guaranteed
accuracy
23 ±5°C(73±9°F), 35 to 80% RH (when zero adjustment is executed 1 hour after power
on)
1 year
The number of input
channels
2 channels (switchable)
Charge input, internal preamp input, voltage input (select one for each channel)
Input type Unbalanced input (floating between input terminals, and floating input terminals to chas-
sis ground, voltage input terminals and charge input terminal ground)
Common mode refection
ratio
80 dB minimum (at 50/60 Hz and with signal source resistance 100 ɹ maximum)
Anti-aliasing filter Cutoff frequency (fc) 20, 40, 80, 200, 400, 800, 2 k, 4 k, 8 k, 20 k, 40 k (Hz)
(ON/OFF, auto setting corresponding to the time axis and frequency axis range)
Attenuation: -66 dB min at 1.5 fc
Maximum sampling speed 1 MS/s
A/D resolution 12 bits
Operating temperature and
humidity ranges
Same as the host Memory HiCorder
Operating environment Same as the host Memory HiCorder
Storage temperature and
humidity ranges
-10 to 50°C (14 to 122°F), 80% RH or less (non-condensating)
Effect of radiated radio-
frequency electromagnetic
field
±10%f.s. at 3 V/m max. (in 5-mV/div range)
Effect of conducted radio-
frequency electromagnetic
field
±5%f.s. at 3 V max. (100 mV/div with 1 V DC input)
Dimensions Approx. 170 W x 20 H x 148.5 D mm (6.69" W x 0.79" H x 5.85" D) (sans protrusions)
Mass Approx. 310 g (10.9 oz)
Applicable Standards
Safety
EMC
EN 61010 Pollution degree 2,
Measurement category I (anticipated transient overvoltage 330 V)
EN 61326 Class A
Charge Input
Compatible converter Charge-output type piezoelectric accelerator pickup sensor
Measurement sensitivity 0.1 to 10 pC/(m/s
2
)
Measurement range 2, 5, 10, 20, 50, 100, 200, 500, 1k, 2k, 5k, 10k (m/s
2
)/div
(Measurement sensitivity: 0.1 to 0.25 pC/(m/s
2
))
1, 2, 5, 10, 20, 50, 100, 200, 500, 1k, 2k, 5k (m/s
2
)/div
(Measurement sensitivity: 0.251 to 0.5 pC/(m/s
2
))
500m, 1, 2, 5, 10, 20, 50, 100, 200, 500, 1k, 2k (m/s
2
)/div
(Measurement sensitivity: 0.501 to 1.0 pC/(m/s
2
))
200m, 500m, 1, 2, 5, 10, 20, 50, 100, 200, 500, 1k (m/s
2
)/div
(Measurement sensitivity: 1.01 to 2.5 pC/(m/s
2
))
100m, 200m, 500m, 1, 2, 5, 10, 20, 50, 100, 200, 500 (m/s
2
)/div
(Measurement sensitivity: 2.51 to 5.0 pC/(m/s
2
))
50m, 100m, 200m, 500m, 1, 2, 5, 10, 20, 50, 100, 200 (m/s
2
)/div
(Measurement sensitivity: 5.01 to 10.0 pC/(m/s
2
))
Amplitude accuracy ±2%f.s.